Bump v10.3.2

chore: cherry-pick 36abafa0a316 from v8 (#27623 )
chore: Chromium backports M87-1 (#26932 )
2026-02-19 03:14:51 -05:00 · 2021-02-05 10:08:23 -08:00 · 2021-02-05 09:43:16 -08:00 · 2021-02-04 13:46:08 -05:00 · 2021-02-03 16:29:09 +09:00 · 2021-01-29 12:44:12 -08:00
1830 changed files with 95201 additions and 56949 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -6,9 +6,11 @@
    "browser": true
  },
  "rules": {
+    "semi": ["error", "always"],
    "no-var": "error",
    "no-unused-vars": 0,
    "no-global-assign": 0,
+    "guard-for-in": 2,
    "@typescript-eslint/no-unused-vars": ["error", {
      "vars": "all",
      "args": "after-used",
@@ -17,18 +19,34 @@
    "prefer-const": ["error", {
      "destructuring": "all"
    }],
+    "standard/no-callback-literal": "off",
    "node/no-deprecated-api": 0
  },
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module"
  },
+  "globals": {
+    "standardScheme": "readonly",
+    "BUILDFLAG": "readonly",
+    "ENABLE_DESKTOP_CAPTURER": "readonly",
+    "ENABLE_REMOTE_MODULE": "readonly",
+    "ENABLE_VIEWS_API": "readonly",
+    "BigInt": "readonly"
+  },
  "overrides": [
    {
      "files": "*.js",
      "rules": {
          "@typescript-eslint/no-unused-vars": "off"
      }
+    },
+    {
+      "files": "*.d.ts",
+      "rules": {
+          "no-useless-constructor": "off",
+          "@typescript-eslint/no-unused-vars": "off"
+      }
    }
  ]
 }
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,3 +1,14 @@
 # `git apply` and friends don't understand CRLF, even on windows. Force those
 # files to be checked out with LF endings even if core.autocrlf is true.
 *.patch text eol=lf
+patches/**/.patches merge=union
+
+# Source code and markdown files should always use LF as line ending.
+*.cc text eol=lf
+*.mm text eol=lf
+*.h text eol=lf
+*.js text eol=lf
+*.ts text eol=lf
+*.py text eol=lf
+*.ps1 text eol=lf
+*.md text eol=lf
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -3,20 +3,10 @@
 # https://help.github.com/articles/about-codeowners
 # https://git-scm.com/docs/gitignore

-# Most stuff in here is owned by the Community & Safety WG...
-/.github/*                              @electron/wg-community
-
-# ...except the Admin WG maintains this file.
-/.github/CODEOWNERS                     @electron/wg-admin
-
 # Upgrades WG
 /patches/                               @electron/wg-upgrades
 DEPS                                    @electron/wg-upgrades

-# Docs & Tooling WG
-/default_app/ @electron/wg-docs-tools
-/docs/                                  @electron/wg-docs-tools
-
 # Releases WG
 /npm/                                   @electron/wg-releases
-/script/release                         @electron/wg-releases
+/script/release                         @electron/wg-releases
--- a/.github/ISSUE_TEMPLATE/security_report.md
+++ b/.github/ISSUE_TEMPLATE/security_report.md
@@ -1,10 +0,0 @@
---
-name: Security report
-about: Do not create an issue for security reports, send an email to security@electronjs.org
-
---
-
-### Notice 
-
-**DO NOT** create an issue for security reports.
-Send an email to: **security@electronjs.org**.
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -18,4 +18,4 @@ Contributors guide: https://github.com/electron/electron/blob/master/CONTRIBUTIN

 #### Release Notes

-Notes: <!-- Please add a one-line description for app developers to read in the release notes, or `no-notes` if no notes relevant to app developers. Examples and help on special cases: https://github.com/electron/clerk/blob/master/README.md#examples -->
+Notes: <!-- Please add a one-line description for app developers to read in the release notes, or 'none' if no notes relevant to app developers. Examples and help on special cases: https://github.com/electron/clerk/blob/master/README.md#examples -->
--- a/.github/config.yml
+++ b/.github/config.yml
@@ -33,6 +33,7 @@ authorizedUsers:
  - codebytere
  - deepak1556
  - jkleinsc
+  - loc
  - MarshallOfSound
  - miniak
  - nornagon
--- a/.gitignore
+++ b/.gitignore
@@ -65,3 +65,4 @@ ts-gen

 # Used to accelerate CI builds
 .depshash
+.depshash-target
--- a/BUILD.gn
+++ b/BUILD.gn
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -1,46 +1,135 @@
-# Contributor Covenant Code of Conduct:
+# Code of Conduct

-## Our Pledge
+As a member project of the OpenJS Foundation, Electron uses [Contributor Covenant v2.0](https://contributor-covenant.org/version/2/0/code_of_conduct) as their code of conduct. The full text is included [below](#contributor-covenant-code-of-conduct) in English, and translations are available from the Contributor Covenant organisation:

-In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+- [contributor-covenant.org/translations](https://www.contributor-covenant.org/translations)
+- [github.com/ContributorCovenant](https://github.com/ContributorCovenant/contributor_covenant/tree/release/content/version/2/0)

-## Our Standards
+## Contributor Covenant Code of Conduct

-Examples of behavior that contributes to creating a positive environment include:
+### Our Pledge

-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.

-Examples of unacceptable behavior by participants include:
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.

-* The use of sexualized language or imagery and unwelcome sexual attention or advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
+### Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
 * Public or private harassment
-* Publishing others' private information, such as a physical or electronic address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a professional setting
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting

-## Our Responsibilities
+### Enforcement Responsibilities

-Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.

-Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.

-## Scope
+### Scope

-This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.

-## Enforcement
+### Enforcement

-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at [coc@electronjs.org](mailto:coc@electronjs.org). All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+[coc@electronjs.org](mailto:coc@electronjs.org).
+All complaints will be reviewed and investigated promptly and fairly.

-Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.

-## Attribution
+### Enforcement Guidelines

-This Code of Conduct is adapted from the [Contributor-Covenant][homepage], version 1.4, available at [https://contributor-covenant.org/version/1/4][version]
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:

-[homepage]: https://contributor-covenant.org
-[version]: https://contributor-covenant.org/version/1/4/
+#### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+#### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+#### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+#### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+### Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.
--- a/18
+++ b/18
@@ -5,17 +5,20 @@ gclient_gn_args = [
  'checkout_android_native_support',
  'checkout_libaom',
  'checkout_nacl',
+  'checkout_pgo_profiles',
  'checkout_oculus_sdk',
-  'checkout_openxr'
+  'checkout_openxr',
+  'checkout_google_benchmark',
+  'mac_xcode_version',
 ]

 vars = {
  'chromium_version':
-    'c3a0220e7bde049d599a8332b9b2785b0178be74',
+    '85.0.4183.121',
  'node_version':
-    'v12.13.0',
+    'v12.16.3',
  'nan_version':
-    '2ee313aaca52e2b478965ac50eb5082520380d1b',
+    '2c4ee8a32a299eada3cd6e468bbd0a473bfea96d',

  'boto_version': 'f7574aa6cc2c819430c1f05e9a1a1a666ef8169b',
  'pyyaml_version': '3.12',
@@ -41,6 +44,7 @@ vars = {
  'checkout_chromium': True,
  'checkout_node': True,
  'checkout_nan': True,
+  'checkout_pgo_profiles': True,

  # It's only needed to parse the native tests configurations.
  'checkout_pyyaml': False,
@@ -48,6 +52,8 @@ vars = {
  # Python "requests" module is used for releases only.
  'checkout_requests': False,

+  'mac_xcode_version': 'default',
+
  # To allow running hooks without parsing the DEPS tree
  'process_deps': True,

@@ -69,6 +75,8 @@ vars = {
    False,
  'checkout_android_native_support':
    False,
+  'checkout_google_benchmark':
+    False,
 }

 deps = {
@@ -114,7 +122,7 @@ hooks = [
    'pattern': 'src/electron/script/update-external-binaries.py',
    'condition': 'download_external_binaries',
    'action': [
-      'python',
+      'python3',
      'src/electron/script/update-external-binaries.py',
    ],
  },
--- a/50
+++ b/50
@@ -1,50 +0,0 @@
-FROM ubuntu:18.04
-
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
-
-# Set up TEMP directory
-ENV TEMP=/tmp
-RUN chmod a+rwx /tmp
-
-# Install Linux packages
-ADD build/install-build-deps.sh /setup/install-build-deps.sh
-RUN echo ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true | debconf-set-selections
-RUN dpkg --add-architecture i386
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
-    curl \
-    libnotify-bin \
-    locales \
-    lsb-release \
-    nano \
-    python-dbus \
-    python-pip \
-    python-setuptools \
-    sudo \
-    vim-nox \
-    wget \
-    g++-multilib \
-    libgl1:i386 \
-  && /setup/install-build-deps.sh --syms --no-prompt --no-chromeos-fonts --lib32 --arm \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install Node.js
-RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
-  && DEBIAN_FRONTEND=noninteractive apt-get install -y nodejs \
-  && rm -rf /var/lib/apt/lists/*
-
-# crcmod is required by gsutil, which is used for filling the gclient git cache
-RUN pip install -U crcmod
-
-# dbusmock is needed for Electron tests
-RUN pip install python-dbusmock
-
-RUN mkdir /tmp/workspace
-RUN chown builduser:builduser /tmp/workspace
-
-# Add xvfb init script
-ADD tools/xvfb-init.sh /etc/init.d/xvfb
-RUN chmod a+x /etc/init.d/xvfb
-
-USER builduser
-WORKDIR /home/builduser
--- a/Dockerfile.arm32v7
+++ b/Dockerfile.arm32v7
@@ -1,59 +0,0 @@
-FROM arm32v7/ubuntu:18.04
-
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
-
-# Set up TEMP directory
-ENV TEMP=/tmp
-RUN chmod a+rwx /tmp
-
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
- bison \
- build-essential \
- clang \
- curl \
- gperf \
- git \
- libasound2 \
- libasound2-dev \
- libcap-dev \
- libcups2-dev \
- libdbus-1-dev \
- libgnome-keyring-dev \
- libgtk2.0-0 \
- libgtk2.0-dev \
- libgtk-3-0 \
- libgtk-3-dev \
- libnotify-bin \
- libnss3 \
- libnss3-dev \
- libxss1 \
- libxtst-dev \
- libxtst6 \
- lsb-release \
- locales \
- nano \
- python-setuptools \
- python-pip \
- python-dbusmock \
- sudo \
- unzip \
- wget \
- xvfb \
-&& rm -rf /var/lib/apt/lists/*
-
-# Install Node.js
-RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
-  && DEBIAN_FRONTEND=noninteractive apt-get install -y nodejs \
-  && rm -rf /var/lib/apt/lists/*
-
-# crcmod is required by gsutil, which is used for filling the gclient git cache
-RUN pip install -U crcmod
-
-ADD tools/xvfb-init.sh /etc/init.d/xvfb
-RUN chmod a+x /etc/init.d/xvfb
-
-RUN usermod -aG sudo builduser
-RUN echo 'builduser ALL=(ALL:ALL) NOPASSWD:ALL' >> /etc/sudoers
-
-WORKDIR /home/builduser
--- a/Dockerfile.arm64v8
+++ b/Dockerfile.arm64v8
@@ -1,65 +0,0 @@
-FROM arm64v8/ubuntu:18.04
-
-RUN groupadd --gid 1000 builduser \
-  && useradd --uid 1000 --gid builduser --shell /bin/bash --create-home builduser
-
-# Set up TEMP directory
-ENV TEMP=/tmp
-RUN chmod a+rwx /tmp
-
-RUN dpkg --add-architecture armhf
-
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
- bison \
- build-essential \
- clang \
- curl \
- gperf \
- git \
- libasound2 \
- libasound2-dev \
- libc6:armhf \
- libcap-dev \
- libcups2-dev \
- libdbus-1-dev \
- libgnome-keyring-dev \
- libgtk2.0-0 \
- libgtk2.0-dev \
- libgtk-3-0 \
- libgtk-3-dev \
- libnotify-bin \
- libnss3 \
- libnss3-dev \
- libstdc++6:armhf \
- libxss1 \
- libxtst-dev \
- libxtst6 \
- lsb-release \
- locales \
- nano \
- python-setuptools \
- python-pip \
- sudo \
- unzip \
- wget \
- xvfb \
-&& rm -rf /var/lib/apt/lists/*
-
-# Install Node.js
-RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
-  && DEBIAN_FRONTEND=noninteractive apt-get install -y nodejs \
-  && rm -rf /var/lib/apt/lists/*
-
-# crcmod is required by gsutil, which is used for filling the gclient git cache
-RUN pip install -U crcmod
-
-# dbusmock is needed for Electron tests
-RUN pip install python-dbusmock
-
-ADD tools/xvfb-init.sh /etc/init.d/xvfb
-RUN chmod a+x /etc/init.d/xvfb
-
-RUN usermod -aG sudo builduser
-RUN echo 'builduser ALL=(ALL:ALL) NOPASSWD:ALL' >> /etc/sudoers
-
-WORKDIR /home/builduser
--- a/2
+++ b/2
@@ -1 +1 @@
-8.0.0-nightly.20191023
+10.3.2
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-Copyright (c) 2013-2019 GitHub Inc.
+Copyright (c) 2013-2020 GitHub Inc.

 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
--- a/README.md
+++ b/README.md
@@ -28,15 +28,12 @@ The preferred method is to install Electron as a development dependency in your
 app:

 ```sh
-npm install electron --save-dev [--save-exact]
+npm install electron --save-dev
 ```

-The `--save-exact` flag is recommended for Electron prior to version 2, as it does not follow semantic
-versioning. As of version 2.0.0, Electron follows semver, so you don't need `--save-exact` flag. For info on how to manage Electron versions in your apps, see
-[Electron versioning](docs/tutorial/electron-versioning.md).
-
 For more installation options and troubleshooting tips, see
-[installation](docs/tutorial/installation.md).
+[installation](docs/tutorial/installation.md). For info on how to manage Electron versions in your apps, see
+[Electron versioning](docs/tutorial/electron-versioning.md).

 ## Quick start & Electron Fiddle

--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 # The config expects the following environment variables to be set:
-#  - "GN_CONFIG" Build type. One of {'debug', 'testing', 'release'}.
+#  - "GN_CONFIG" Build type. One of {'testing', 'release'}.
 #  - "GN_EXTRA_ARGS" Additional gn arguments for a build config,
 #      e.g. 'target_cpu="x86"' to build for a 32bit platform.
 #      https://gn.googlesource.com/gn/+/master/docs/reference.md#target_cpu
@@ -28,8 +28,8 @@
 #  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))

 version: 1.0.{build}
-build_cloud: libcc-20
-image: vs2017-15.9-10.0.18362
+build_cloud: electron-16-core
+image: vs2019bt-16.6.2
 environment:
  GIT_CACHE_PATH: C:\Users\electron\libcc_cache
  ELECTRON_OUT_DIR: Default
@@ -50,6 +50,14 @@ build_script:
  - ps: >-
      if(($env:APPVEYOR_PULL_REQUEST_HEAD_REPO_NAME -split "/")[0] -eq ($env:APPVEYOR_REPO_NAME -split "/")[0]) {
        Write-warning "Skipping PR build for branch"; Exit-AppveyorBuild
+      } else {
+        node script/yarn.js install --frozen-lockfile
+
+        $result = node script/doc-only-change.js --prNumber=$env:APPVEYOR_PULL_REQUEST_NUMBER --prBranch=$env:APPVEYOR_REPO_BRANCH
+        Write-Output $result
+        if ($result.ExitCode -eq 0) {
+          Write-warning "Skipping build for doc only change"; Exit-AppveyorBuild
+        }
      }
  - echo "Building $env:GN_CONFIG build"
  - git config --global core.longpaths true
@@ -70,23 +78,93 @@ build_script:
      --unmanaged
      %GCLIENT_EXTRA_ARGS%
      "https://github.com/electron/electron"
-  - gclient sync --with_branch_heads --with_tags --reset
+  - ps: >-
+      if ($env:GN_CONFIG -eq 'release') {
+        $env:RUN_GCLIENT_SYNC="true"
+      } else {
+        cd src\electron
+        node script\generate-deps-hash.js
+        $depshash = Get-Content .\.depshash -Raw 
+        $zipfile = "Z:\$depshash.7z"
+        cd ..\..
+        if (Test-Path -Path $zipfile) {
+          # file exists, unzip and then gclient sync
+          7z x -y $zipfile -mmt=30 -aoa
+          if (-not (Test-Path -Path "src\buildtools")) {
+            # the zip file must be corrupt - resync
+            $env:RUN_GCLIENT_SYNC="true"
+            if ($env:TARGET_ARCH -ne 'ia32') {
+              # only save on x64/woa to avoid contention saving
+              $env:SAVE_GCLIENT_SRC="true"
+            }
+          } else {
+            # update external binaries
+            python src/electron/script/update-external-binaries.py
+          }
+        } else {    
+          # file does not exist, gclient sync, then zip
+          $env:RUN_GCLIENT_SYNC="true"
+          if ($env:TARGET_ARCH -ne 'ia32') {
+            # only save on x64/woa to avoid contention saving
+            $env:SAVE_GCLIENT_SRC="true"
+          }
+        }
+      }
+  - if "%RUN_GCLIENT_SYNC%"=="true" ( gclient sync --with_branch_heads --with_tags --ignore_locks)
+  - ps: >-
+      if ($env:SAVE_GCLIENT_SRC -eq 'true') {
+        # archive current source for future use 
+        # only run on x64/woa to avoid contention saving
+        if ($(7z a $zipfile src -xr!android_webview -xr!electron -xr'!*\.git' -xr!third_party\WebKit\LayoutTests! -xr!third_party\blink\web_tests -xr!third_party\blink\perf_tests -slp -t7z -mmt=30;$LASTEXITCODE -ne 0)) {
+          Write-warning "Could not save source to shared drive; continuing anyway"
+        }
+        # build time generation of file gen/angle/commit.h depends on
+        # third_party/angle/.git/HEAD.
+        # https://chromium-review.googlesource.com/c/angle/angle/+/2074924
+        if ($(7z a $zipfile src\third_party\angle\.git\HEAD;$LASTEXITCODE -ne 0)) {
+          Write-warning "Failed to add third_party\angle\.git\HEAD; continuing anyway"
+        }
+      }
+  - ps: >-
+      if ($env:GN_CONFIG -ne 'release') {
+        if (Test-Path 'env:RAW_GOMA_AUTH') {
+          $env:GOMA_OAUTH2_CONFIG_FILE = "$pwd\.goma_oauth2_config"
+          $env:RAW_GOMA_AUTH | Set-Content $env:GOMA_OAUTH2_CONFIG_FILE      
+        }
+        git clone https://github.com/electron/build-tools.git
+        cd build-tools
+        npm install
+        mkdir third_party
+        node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
+        $env:GN_GOMA_FILE = node -e "console.log(require('./src/utils/goma.js').gnFilePath)"
+        $env:LOCAL_GOMA_DIR = node -e "console.log(require('./src/utils/goma.js').dir)"
+        cd ..
+        .\src\electron\script\start-goma.ps1 -gomaDir $env:LOCAL_GOMA_DIR
+      }
  - cd src
-  - ps: $env:BUILD_CONFIG_PATH="//electron/build/args/%GN_CONFIG%.gn"
-  - gn gen out/Default "--args=import(\"%BUILD_CONFIG_PATH%\") %GN_EXTRA_ARGS%"
+  - set BUILD_CONFIG_PATH=//electron/build/args/%GN_CONFIG%.gn 
+  - if DEFINED GN_GOMA_FILE (gn gen out/Default "--args=import(\"%BUILD_CONFIG_PATH%\") import(\"%GN_GOMA_FILE%\") %GN_EXTRA_ARGS% ") else (gn gen out/Default "--args=import(\"%BUILD_CONFIG_PATH%\") %GN_EXTRA_ARGS% cc_wrapper=\"%SCCACHE_PATH%\"")
  - gn check out/Default //electron:electron_lib
  - gn check out/Default //electron:electron_app
  - gn check out/Default //electron:manifests
  - gn check out/Default //electron/shell/common/api:mojo
-  - ninja -C out/Default electron:electron_app
-  - if "%GN_CONFIG%"=="testing" ( python C:\Users\electron\depot_tools\post_build_ninja_summary.py -C out\Default )  
+  - if DEFINED GN_GOMA_FILE (ninja -j 300 -C out/Default electron:electron_app) else (ninja -C out/Default electron:electron_app)
+  - if "%GN_CONFIG%"=="testing" ( python C:\depot_tools\post_build_ninja_summary.py -C out\Default )
  - gn gen out/ffmpeg "--args=import(\"//electron/build/args/ffmpeg.gn\") %GN_EXTRA_ARGS%"
  - ninja -C out/ffmpeg electron:electron_ffmpeg_zip
  - ninja -C out/Default electron:electron_dist_zip
  - ninja -C out/Default shell_browser_ui_unittests
+  - gn desc out/Default v8:run_mksnapshot_default args > out/Default/mksnapshot_args
  - ninja -C out/Default electron:electron_mksnapshot_zip
+  - cd out\Default
+  - 7z a mksnapshot.zip mksnapshot_args gen\v8\embedded.S
+  - cd ..\..
+  - ninja -C out/Default electron:hunspell_dictionaries_zip
  - ninja -C out/Default electron:electron_chromedriver_zip
  - ninja -C out/Default third_party/electron_node:headers
+  - if "%GN_CONFIG%"=="testing" ( python %LOCAL_GOMA_DIR%\goma_ctl.py stat )
+  - python electron/build/profile_toolchain.py --output-json=out/Default/windows_toolchain_profile.json
+  - appveyor PushArtifact out/Default/windows_toolchain_profile.json
  - appveyor PushArtifact out/Default/dist.zip
  - appveyor PushArtifact out/Default/shell_browser_ui_unittests.exe
  - appveyor PushArtifact out/Default/chromedriver.zip
@@ -94,6 +172,7 @@ build_script:
  - 7z a node_headers.zip out\Default\gen\node_headers
  - appveyor PushArtifact node_headers.zip
  - appveyor PushArtifact out/Default/mksnapshot.zip
+  - appveyor PushArtifact out/Default/hunspell_dictionaries.zip
  - appveyor PushArtifact out/Default/electron.lib
  - ps: >-
      if ($env:GN_CONFIG -eq 'release') {
@@ -104,12 +183,12 @@ build_script:
  - ps: >-
      if ($env:GN_CONFIG -eq 'release') {
        python electron\script\zip-symbols.py
-        appveyor PushArtifact out/Default/symbols.zip
+        appveyor-retry appveyor PushArtifact out/Default/symbols.zip
      } else {
        # It's useful to have pdb files when debugging testing builds that are
        # built on CI.
        7z a pdb.zip out\Default\*.pdb
-        appveyor PushArtifact pdb.zip
+        appveyor-retry appveyor PushArtifact pdb.zip
      }
  - python electron/script/zip_manifests/check-zip-manifest.py out/Default/dist.zip electron/script/zip_manifests/dist_zip.win.%TARGET_ARCH%.manifest
 test_script:
@@ -127,22 +206,24 @@ test_script:
        echo "Skipping tests for $env:GN_CONFIG build"
      }
  - cd electron
-  - if "%RUN_TESTS%"=="true" ( echo Running test suite & node script/yarn test -- --ci --enable-logging)
+  - if "%RUN_TESTS%"=="true" ( echo Running test suite & node script/yarn test -- --trace-uncaught --enable-logging)
  - cd ..
  - if "%RUN_TESTS%"=="true" ( echo Verifying non proprietary ffmpeg & python electron\script\verify-ffmpeg.py --build-dir out\Default --source-root %cd% --ffmpeg-path out\ffmpeg )
  - echo "About to verify mksnapshot"
  - if "%RUN_TESTS%"=="true" ( echo Verifying mksnapshot & python electron\script\verify-mksnapshot.py --build-dir out\Default --source-root %cd% )
  - echo "Done verifying mksnapshot"
+  - if "%RUN_TESTS%"=="true" ( echo Verifying chromedriver & python electron\script\verify-chromedriver.py --build-dir out\Default --source-root %cd% )
+  - echo "Done verifying chromedriver"
 deploy_script:
  - cd electron
  - ps: >-
      if (Test-Path Env:\ELECTRON_RELEASE) {
        if (Test-Path Env:\UPLOAD_TO_S3) {
          Write-Output "Uploading Electron release distribution to s3"
-          & python script\release\uploaders\upload.py --upload_to_s3
+          & python script\release\uploaders\upload.py --verbose --upload_to_s3
        } else {
          Write-Output "Uploading Electron release distribution to github releases"
-          & python script\release\uploaders\upload.py
+          & python script\release\uploaders\upload.py --verbose
        }
      } elseif (Test-Path Env:\TEST_WOA) {
        node script/release/ci-release-build.js --job=electron-woa-testing --ci=VSTS --armTest --appveyorJobId=$env:APPVEYOR_JOB_ID $env:APPVEYOR_REPO_BRANCH
--- a/azure-pipelines-woa.yml
+++ b/azure-pipelines-woa.yml
@@ -63,7 +63,7 @@ steps:
    set npm_config_nodedir=%cd%\out\Default\gen\node_headers
    set npm_config_arch=arm64
    cd electron
-    node script/yarn test -- --ci --enable-logging --verbose
+    node script/yarn test -- --enable-logging --verbose
  displayName: 'Run Electron tests'
  env:
    ELECTRON_OUT_DIR: Default
@@ -87,6 +87,11 @@ steps:

 - powershell: |
    Get-Process | Where Name –Like "electron*" | Stop-Process
-    Get-Process | Where Name –Like "MicrosoftEdge*" | Stop-Process
+    Get-Process | Where Name –Like "msedge*" | Stop-Process
  displayName: 'Kill processes left running from last test run'
-  condition: always()
+  condition: always()
+
+- powershell: |
+    Remove-Item -path $env:APPDATA/Electron* -Recurse
+  displayName: 'Delete user app data directories'
+  condition: always()
--- a/build/args/all.gn
+++ b/build/args/all.gn
@@ -1,9 +1,8 @@
 is_electron_build = true
-use_jumbo_build = true
 root_extra_deps = [ "//electron" ]

 # Registry of NMVs --> https://github.com/nodejs/node/blob/master/doc/abi_version_registry.json
-node_module_version = 76
+node_module_version = 82

 v8_promise_internal_field_count = 1
 v8_typed_array_max_size_in_heap = 0
@@ -18,12 +17,6 @@ ffmpeg_branding = "Chrome"

 enable_basic_printing = true
 angle_enable_vulkan_validation_layers = false
+dawn_enable_vulkan_validation_layers = false

 is_cfi = false
-
-# TODO: Remove this and update CI to contain 10.14 SDK once
-# crbug.com/986701 is fixed.
-mac_sdk_min = "10.13"
-
-# TODO: disabled due to crashes. re-enable.
-enable_osr = false
--- a/build/args/debug.gn
+++ b/build/args/debug.gn
@@ -1,10 +0,0 @@
-import("all.gn")
-is_debug = true
-is_component_build = true
-
-# This may be guarded behind is_chrome_branded alongside
-# proprietary_codecs https://webrtc-review.googlesource.com/c/src/+/36321,
-# explicitly override here to build OpenH264 encoder/FFmpeg decoder.
-# The initialization of the decoder depends on whether ffmpeg has
-# been built with H.264 support.
-rtc_use_h264 = proprietary_codecs
--- a/build/args/native_tests.gn
+++ b/build/args/native_tests.gn
@@ -5,4 +5,3 @@ is_debug = false
 is_component_build = false
 is_component_ffmpeg = false
 symbol_level = 1
-use_jumbo_build = true
--- a/build/extract_symbols.gni
+++ b/build/extract_symbols.gni
@@ -34,9 +34,7 @@ template("extract_symbols") {
      dump_syms_binary,
    ]
    stamp_file = "${target_gen_dir}/${target_name}.stamp"
-    outputs = [
-      stamp_file,
-    ]
+    outputs = [ stamp_file ]
    args = [
      "./" + rebase_path(dump_syms_binary, root_build_dir),
      rebase_path(invoker.binary, root_build_dir),
--- a/build/npm.gni
+++ b/build/npm.gni
@@ -10,9 +10,7 @@ template("npm_action") {
    ]
    script = "//electron/build/npm-run.py"

-    outputs = [
-      "$target_gen_dir/npm_pre_stamps/" + target_name + ".stamp",
-    ]
+    outputs = [ "$target_gen_dir/npm_pre_stamps/" + target_name + ".stamp" ]

    args = [
      "--silent",
--- a/build/profile_toolchain.py
+++ b/build/profile_toolchain.py
@@ -0,0 +1,98 @@
+from __future__ import with_statement
+import contextlib
+import sys
+import os
+import optparse
+import json
+
+sys.path.append("%s/../../build" % os.path.dirname(os.path.realpath(__file__)))
+
+import find_depot_tools
+from vs_toolchain import \
+    SetEnvironmentAndGetRuntimeDllDirs, \
+    SetEnvironmentAndGetSDKDir, \
+    GetVisualStudioVersion, \
+    NormalizePath
+
+sys.path.append("%s/win_toolchain" % find_depot_tools.add_depot_tools_to_path())
+
+from get_toolchain_if_necessary import CalculateHash
+
+
+@contextlib.contextmanager
+def cwd(dir):
+    curdir = os.getcwd()
+    try:
+        os.chdir(dir)
+        yield
+    finally:
+        os.chdir(curdir)
+
+
+def calculate_hash(root):
+    with cwd(root):
+        return CalculateHash('.', None)
+
+def windows_installed_software():
+    import win32com.client
+    strComputer = "."
+    objWMIService = win32com.client.Dispatch("WbemScripting.SWbemLocator")
+    objSWbemServices = objWMIService.ConnectServer(strComputer, "root\cimv2")
+    colItems = objSWbemServices.ExecQuery("Select * from Win32_Product")
+    items = []
+
+    for objItem in colItems:
+        item = {}
+        if objItem.Caption:
+            item['caption'] = objItem.Caption
+        if objItem.Caption:
+            item['description'] = objItem.Description
+        if objItem.InstallDate:
+            item['install_date'] = objItem.InstallDate
+        if objItem.InstallDate2:
+            item['install_date_2'] = objItem.InstallDate2
+        if objItem.InstallLocation:
+            item['install_location'] = objItem.InstallLocation
+        if objItem.Name:
+            item['name'] = objItem.Name
+        if objItem.SKUNumber:
+            item['sku_number'] = objItem.SKUNumber
+        if objItem.Vendor:
+            item['vendor'] = objItem.Vendor
+        if objItem.Version:
+            item['version'] = objItem.Version
+        items.append(item)
+
+    return items
+
+
+def windows_profile():
+    runtime_dll_dirs = SetEnvironmentAndGetRuntimeDllDirs()
+    win_sdk_dir = SetEnvironmentAndGetSDKDir()
+    path = NormalizePath(os.environ['GYP_MSVS_OVERRIDE_PATH'])
+
+    return {
+        'pwd': os.getcwd(), # since current windows executable are symbols path dependant, profile the current directory too
+        'installed_software': windows_installed_software(),
+        'sdks': [
+            {'name': 'vs', 'path': path, 'hash': calculate_hash(path)},
+            {'name': 'wsdk', 'path': win_sdk_dir, 'hash': calculate_hash(win_sdk_dir)}
+        ],
+        'runtime_lib_dirs': runtime_dll_dirs,
+    }
+
+
+def main(options):
+    if sys.platform == 'win32':
+        with open(options.output_json, 'wb') as f:
+            json.dump(windows_profile(), f)
+    else:
+        raise OSError("Unsupported OS")
+
+
+if __name__ == '__main__':
+  parser = optparse.OptionParser()
+  parser.add_option('--output-json', metavar='FILE', default='profile.json',
+                    help='write information about toolchain to FILE')
+  options, args = parser.parse_args()
+  sys.exit(main(options))
--- a/build/rules.gni
+++ b/build/rules.gni
@@ -1,9 +1,50 @@
 import("//build/config/mac/mac_sdk.gni")

-# This is imported from /ios becuase this functionality was moved
-# after Chromium stopped using xib files for macOS menu functionality
-# See https://chromium-review.googlesource.com/c/chromium/src/+/1648695
-import("//build/config/ios/rules.gni")
+# Template to compile .xib and .storyboard files.
+# (copied from src/build/config/ios/rules.gni)
+#
+# Arguments
+#
+#     sources:
+#         list of string, sources to compile
+#
+#     ibtool_flags:
+#         (optional) list of string, additional flags to pass to the ibtool
+template("compile_ib_files") {
+  action_foreach(target_name) {
+    forward_variables_from(invoker,
+                           [
+                             "testonly",
+                             "visibility",
+                           ])
+    assert(defined(invoker.sources),
+           "sources must be specified for $target_name")
+    assert(defined(invoker.output_extension),
+           "output_extension must be specified for $target_name")
+
+    ibtool_flags = []
+    if (defined(invoker.ibtool_flags)) {
+      ibtool_flags = invoker.ibtool_flags
+    }
+
+    _output_extension = invoker.output_extension
+
+    script = "//build/config/ios/compile_ib_files.py"
+    sources = invoker.sources
+    outputs = [
+      "$target_gen_dir/$target_name/{{source_name_part}}.$_output_extension",
+    ]
+    args = [
+      "--input",
+      "{{source}}",
+      "--output",
+      rebase_path(
+          "$target_gen_dir/$target_name/{{source_name_part}}.$_output_extension",
+          root_build_dir),
+    ]
+    args += ibtool_flags
+  }
+}

 # Template is copied here from Chromium but was removed in
 # https://chromium-review.googlesource.com/c/chromium/src/+/1637981
@@ -40,9 +81,7 @@ template("mac_xib_bundle_data") {
                             "visibility",
                           ])

-    public_deps = [
-      ":$_compile_target_name",
-    ]
+    public_deps = [ ":$_compile_target_name" ]
    sources = get_target_outputs(":$_compile_target_name")

    _output_path = "{{bundle_resources_dir}}"
@@ -50,8 +89,6 @@ template("mac_xib_bundle_data") {
      _output_path = invoker.output_path
    }

-    outputs = [
-      "$_output_path/{{source_file_part}}",
-    ]
+    outputs = [ "$_output_path/{{source_file_part}}" ]
  }
 }
--- a/build/templated_file.gni
+++ b/build/templated_file.gni
@@ -15,12 +15,8 @@ template("templated_file") {
                             "inputs",
                             "outputs",
                           ])
-    inputs = [
-      invoker.template,
-    ]
-    outputs = [
-      invoker.output,
-    ]
+    inputs = [ invoker.template ]
+    outputs = [ invoker.output ]
    script = "//electron/build/generate-template.py"
    args = [
      rebase_path(invoker.template),
--- a/build/webpack/run-compiler.js
+++ b/build/webpack/run-compiler.js
@@ -1,3 +1,4 @@
+const fs = require('fs');
 const path = require('path')
 const webpack = require('webpack')

@@ -9,7 +10,9 @@ config.output = {
  filename: path.basename(outPath)
 }

-webpack(config, (err, stats) => {
+const { wrapInitWithProfilingTimeout, wrapInitWithTryCatch, ...webpackConfig } = config;
+
+webpack(webpackConfig, (err, stats) => {
  if (err) {
    console.error(err)
    process.exit(1)
@@ -17,6 +20,26 @@ webpack(config, (err, stats) => {
    console.error(stats.toString('normal'))
    process.exit(1)
  } else {
+    let contents = fs.readFileSync(outPath, 'utf8');
+    if (wrapInitWithTryCatch) {
+      contents = `try {
+${contents}
+} catch (err) {
+  console.error('Electron ${webpackConfig.output.filename} script failed to run');
+  console.error(err);
+}`;
+    }
+    if (wrapInitWithProfilingTimeout) {
+      contents = `function ___electron_webpack_init__() {
+${contents}
+};
+if ((globalThis.process || binding.process).argv.includes("--profile-electron-init")) {
+  setTimeout(___electron_webpack_init__, 0);
+} else {
+  ___electron_webpack_init__();
+}`;
+    }
+    fs.writeFileSync(outPath, contents)
    process.exit(0)
  }
 })
--- a/build/webpack/webpack.config.base.js
+++ b/build/webpack/webpack.config.base.js
@@ -1,6 +1,7 @@
 const fs = require('fs')
 const path = require('path')
 const webpack = require('webpack')
+const TerserPlugin = require('terser-webpack-plugin');

 const electronRoot = path.resolve(__dirname, '../..')

@@ -20,11 +21,56 @@ class AccessDependenciesPlugin {
  }
 }

+const defines = {
+  BUILDFLAG: onlyPrintingGraph ? '(a => a)' : ''
+}
+
+const buildFlagsPrefix = '--buildflags='
+const buildFlagArg = process.argv.find(arg => arg.startsWith(buildFlagsPrefix));
+
+if (buildFlagArg) {
+  const buildFlagPath = buildFlagArg.substr(buildFlagsPrefix.length)
+
+  const flagFile = fs.readFileSync(buildFlagPath, 'utf8')
+  for (const line of flagFile.split(/(\r\n|\r|\n)/g)) {
+    const flagMatch = line.match(/#define BUILDFLAG_INTERNAL_(.+?)\(\) \(([01])\)/)
+    if (flagMatch) {
+      const [, flagName, flagValue] = flagMatch;
+      defines[flagName] = JSON.stringify(Boolean(parseInt(flagValue, 10)));
+    }
+  }
+}
+
+const ignoredModules = []
+
+if (defines['ENABLE_DESKTOP_CAPTURER'] === 'false') {
+  ignoredModules.push(
+    '@electron/internal/browser/desktop-capturer',
+    '@electron/internal/browser/api/desktop-capturer',
+    '@electron/internal/renderer/api/desktop-capturer'
+  )
+}
+
+if (defines['ENABLE_REMOTE_MODULE'] === 'false') {
+  ignoredModules.push(
+    '@electron/internal/browser/remote/server',
+    '@electron/internal/renderer/api/remote'
+  )
+}
+
+if (defines['ENABLE_VIEWS_API'] === 'false') {
+  ignoredModules.push(
+    '@electron/internal/browser/api/views/image-view.js'
+  )
+}
+
 module.exports = ({
  alwaysHasNode,
  loadElectronFromAlternateTarget,
  targetDeletesNodeGlobals,
-  target
+  target,
+  wrapInitWithProfilingTimeout,
+  wrapInitWithTryCatch
 }) => {
  let entry = path.resolve(electronRoot, 'lib', target, 'init.ts')
  if (!fs.existsSync(entry)) {
@@ -33,29 +79,37 @@ module.exports = ({

  return ({
    mode: 'development',
-    devtool: 'inline-source-map',
+    devtool: false,
    entry,
    target: alwaysHasNode ? 'node' : 'web',
    output: {
      filename: `${target}.bundle.js`
    },
+    wrapInitWithProfilingTimeout,
+    wrapInitWithTryCatch,
    resolve: {
      alias: {
        '@electron/internal': path.resolve(electronRoot, 'lib'),
        'electron': path.resolve(electronRoot, 'lib', loadElectronFromAlternateTarget || target, 'api', 'exports', 'electron.ts'),
-        // Force timers to resolve to our dependency that doens't use window.postMessage
+        // Force timers to resolve to our dependency that doesn't use window.postMessage
        'timers': path.resolve(electronRoot, 'node_modules', 'timers-browserify', 'main.js')
      },
      extensions: ['.ts', '.js']
    },
    module: {
      rules: [{
+        test: (moduleName) => !onlyPrintingGraph && ignoredModules.includes(moduleName),
+        loader: 'null-loader',
+      }, {
        test: /\.ts$/,
        loader: 'ts-loader',
        options: {
          configFile: path.resolve(electronRoot, 'tsconfig.electron.json'),
          transpileOnly: onlyPrintingGraph,
-          ignoreDiagnostics: [6059]
+          ignoreDiagnostics: [
+            // File '{0}' is not under 'rootDir' '{1}'.
+            6059,
+          ]
        }
      }]
    },
@@ -66,6 +120,17 @@ module.exports = ({
      // one of our renderer bundles should import it from the 'timers' package
      setImmediate: false,
    },
+    optimization: {
+      minimize: true,
+      minimizer: [
+        new TerserPlugin({
+          terserOptions: {
+            keep_classnames: true,
+            keep_fnames: true,
+          },
+        }),
+      ],
+    },
    plugins: [
      new AccessDependenciesPlugin(),
      ...(targetDeletesNodeGlobals ? [
@@ -74,7 +139,11 @@ module.exports = ({
          global: ['@electron/internal/renderer/webpack-provider', '_global'],
          Buffer: ['@electron/internal/renderer/webpack-provider', 'Buffer'],
        })
-      ] : [])
+      ] : []),
+      new webpack.ProvidePlugin({
+        Promise: ['@electron/internal/common/webpack-globals-provider', 'Promise'],
+      }),
+      new webpack.DefinePlugin(defines),
    ]
  })
-}
+}
--- a/build/webpack/webpack.config.content_script.js
+++ b/build/webpack/webpack.config.content_script.js
@@ -1,4 +0,0 @@
-module.exports = require('./webpack.config.base')({
-  target: 'content_script',
-  alwaysHasNode: false
-})
--- a/build/webpack/webpack.config.isolated_renderer.js
+++ b/build/webpack/webpack.config.isolated_renderer.js
@@ -1,4 +1,5 @@
 module.exports = require('./webpack.config.base')({
  target: 'isolated_renderer',
-  alwaysHasNode: false
+  alwaysHasNode: false,
+  wrapInitWithTryCatch: true
 })
--- a/build/webpack/webpack.config.renderer.js
+++ b/build/webpack/webpack.config.renderer.js
@@ -1,5 +1,7 @@
 module.exports = require('./webpack.config.base')({
  target: 'renderer',
  alwaysHasNode: true,
-  targetDeletesNodeGlobals: true
+  targetDeletesNodeGlobals: true,
+  wrapInitWithProfilingTimeout: true,
+  wrapInitWithTryCatch: true
 })
--- a/build/webpack/webpack.config.sandboxed_renderer.js
+++ b/build/webpack/webpack.config.sandboxed_renderer.js
@@ -1,4 +1,6 @@
 module.exports = require('./webpack.config.base')({
  target: 'sandboxed_renderer',
-  alwaysHasNode: false
+  alwaysHasNode: false,
+  wrapInitWithProfilingTimeout: true,
+  wrapInitWithTryCatch: true
 })
--- a/build/webpack/webpack.config.worker.js
+++ b/build/webpack/webpack.config.worker.js
@@ -2,5 +2,6 @@ module.exports = require('./webpack.config.base')({
  target: 'worker',
  loadElectronFromAlternateTarget: 'renderer',
  alwaysHasNode: true,
-  targetDeletesNodeGlobals: true
+  targetDeletesNodeGlobals: true,
+  wrapInitWithTryCatch: true
 })
--- a/build/webpack/webpack.gni
+++ b/build/webpack/webpack.gni
@@ -16,6 +16,7 @@ template("webpack_build") {
    inputs = [
               invoker.config_file,
               "//electron/build/webpack/webpack.config.base.js",
+               "//electron/build/webpack/run-compiler.js",
               "//electron/tsconfig.json",
               "//electron/yarn.lock",
               "//electron/typings/internal-ambient.d.ts",
@@ -25,10 +26,10 @@ template("webpack_build") {
    args = [
      rebase_path(invoker.config_file),
      rebase_path(invoker.out_file),
+      "--buildflags=" + rebase_path("$target_gen_dir/buildflags/buildflags.h"),
    ]
+    deps += [ "buildflags" ]

-    outputs = [
-      invoker.out_file,
-    ]
+    outputs = [ invoker.out_file ]
  }
 }
--- a/build/zip.py
+++ b/build/zip.py
@@ -9,6 +9,7 @@ EXTENSIONS_TO_SKIP = [
  '.pdb',
  '.mojom.js',
  '.mojom-lite.js',
+  '.info'
 ]

 PATHS_TO_SKIP = [
@@ -16,10 +17,21 @@ PATHS_TO_SKIP = [
  './libVkICD_mock_', #Skipping because these are outputs that we don't need
  './VkICD_mock_', #Skipping because these are outputs that we don't need

+  # Skipping because its an output of create_bundle from //build/config/mac/rules.gni
+  # that we don't need
+  'Electron.dSYM',
+
  # //chrome/browser:resources depends on this via
  # //chrome/browser/resources/ssl/ssl_error_assistant, but we don't need to
  # ship it.
  'pyproto',
+
+  # On Windows, this binary doesn't exist (the crashpad handler is built-in).
+  # On MacOS, the binary is called 'chrome_crashpad_handler' and is inside the
+  # app bundle.
+  # On Linux, we don't use crashpad, but this binary is still built for some
+  # reason. Exclude it from the zip.
+  './crashpad_handler',
 ]

 def skip_path(dep, dist_zip, target_cpu):
@@ -46,19 +58,19 @@ def execute(argv):
    raise e

 def main(argv):
-  dist_zip, runtime_deps, target_cpu, target_os = argv
+  dist_zip, runtime_deps, target_cpu, target_os, flatten_val = argv
+  should_flatten = flatten_val == "true"
  dist_files = set()
  with open(runtime_deps) as f:
    for dep in f.readlines():
      dep = dep.strip()
-      dist_files.add(dep)
-  if sys.platform == 'darwin':
+      if not skip_path(dep, dist_zip, target_cpu):
+        dist_files.add(dep)
+  if sys.platform == 'darwin' and not should_flatten:
    execute(['zip', '-r', '-y', dist_zip] + list(dist_files))
  else:
    with zipfile.ZipFile(dist_zip, 'w', zipfile.ZIP_DEFLATED, allowZip64=True) as z:
      for dep in dist_files:
-        if skip_path(dep, dist_zip, target_cpu):
-          continue
        if os.path.isdir(dep):
          for root, dirs, files in os.walk(dep):
            for file in files:
@@ -67,7 +79,7 @@ def main(argv):
          basename = os.path.basename(dep)
          dirname = os.path.dirname(dep)
          arcname = os.path.join(dirname, 'chrome-sandbox') if basename == 'chrome_sandbox' else dep
-          z.write(dep, arcname)
+          z.write(dep, os.path.basename(arcname) if should_flatten else arcname)

 if __name__ == '__main__':
  sys.exit(main(sys.argv[1:]))
--- a/buildflags/BUILD.gn
+++ b/buildflags/BUILD.gn
@@ -13,13 +13,15 @@ buildflag_header("buildflags") {
    "ENABLE_RUN_AS_NODE=$enable_run_as_node",
    "ENABLE_OSR=$enable_osr",
    "ENABLE_REMOTE_MODULE=$enable_remote_module",
-    "ENABLE_VIEW_API=$enable_view_api",
+    "ENABLE_VIEWS_API=$enable_views_api",
    "ENABLE_PEPPER_FLASH=$enable_pepper_flash",
    "ENABLE_PDF_VIEWER=$enable_pdf_viewer",
    "ENABLE_TTS=$enable_tts",
    "ENABLE_COLOR_CHOOSER=$enable_color_chooser",
    "ENABLE_ELECTRON_EXTENSIONS=$enable_electron_extensions",
+    "ENABLE_BUILTIN_SPELLCHECKER=$enable_builtin_spellchecker",
    "ENABLE_PICTURE_IN_PICTURE=$enable_picture_in_picture",
+    "ENABLE_WIN_DARK_MODE_WINDOW_UI=$enable_win_dark_mode_window_ui",
    "OVERRIDE_LOCATION_PROVIDER=$enable_fake_location_provider",
  ]
 }
--- a/buildflags/buildflags.gni
+++ b/buildflags/buildflags.gni
@@ -12,9 +12,9 @@ declare_args() {

  enable_remote_module = true

-  enable_view_api = false
+  enable_views_api = true

-  enable_pdf_viewer = false
+  enable_pdf_viewer = true

  enable_tts = true

@@ -32,5 +32,11 @@ declare_args() {
  enable_pepper_flash = true

  # Enable Chrome extensions support.
-  enable_electron_extensions = false
+  enable_electron_extensions = true
+
+  # Enable Spellchecker support
+  enable_builtin_spellchecker = true
+
+  # Undocumented Windows dark mode API
+  enable_win_dark_mode_window_ui = false
 }
--- a/chromium_src/BUILD.gn
+++ b/chromium_src/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.

 import("//build/config/ui.gni")
+import("//components/spellcheck/spellcheck_build_features.gni")
 import("//electron/buildflags/buildflags.gni")
 import("//printing/buildflags/buildflags.gni")
 import("//third_party/widevine/cdm/widevine.gni")
@@ -13,6 +14,8 @@ static_library("chrome") {
  sources = [
    "//chrome/browser/browser_process.cc",
    "//chrome/browser/browser_process.h",
+    "//chrome/browser/crash_upload_list/crash_upload_list_crashpad.cc",
+    "//chrome/browser/crash_upload_list/crash_upload_list_crashpad.h",
    "//chrome/browser/devtools/devtools_contents_resizing_strategy.cc",
    "//chrome/browser/devtools/devtools_contents_resizing_strategy.h",
    "//chrome/browser/devtools/devtools_embedder_message_dispatcher.cc",
@@ -31,6 +34,8 @@ static_library("chrome") {
    "//chrome/browser/icon_loader_win.cc",
    "//chrome/browser/icon_manager.cc",
    "//chrome/browser/icon_manager.h",
+    "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.h",
+    "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.mm",
    "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.cc",
    "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.h",
    "//chrome/browser/net/proxy_config_monitor.cc",
@@ -39,6 +44,8 @@ static_library("chrome") {
    "//chrome/browser/net/proxy_service_factory.h",
    "//chrome/browser/predictors/preconnect_manager.cc",
    "//chrome/browser/predictors/preconnect_manager.h",
+    "//chrome/browser/predictors/predictors_features.cc",
+    "//chrome/browser/predictors/predictors_features.h",
    "//chrome/browser/predictors/proxy_lookup_client_impl.cc",
    "//chrome/browser/predictors/proxy_lookup_client_impl.h",
    "//chrome/browser/predictors/resolve_host_client_impl.cc",
@@ -46,10 +53,12 @@ static_library("chrome") {
    "//chrome/browser/ssl/security_state_tab_helper.cc",
    "//chrome/browser/ssl/security_state_tab_helper.h",
    "//chrome/browser/ssl/tls_deprecation_config.cc",
-    "//chrome/browser/ui/autofill/popup_view_common.cc",
-    "//chrome/browser/ui/autofill/popup_view_common.h",
+    "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.cc",
+    "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.h",
    "//chrome/browser/win/chrome_process_finder.cc",
    "//chrome/browser/win/chrome_process_finder.h",
+    "//chrome/child/v8_crashpad_support_win.cc",
+    "//chrome/child/v8_crashpad_support_win.h",
    "//extensions/browser/app_window/size_constraints.cc",
    "//extensions/browser/app_window/size_constraints.h",
  ]
@@ -63,7 +72,9 @@ static_library("chrome") {
  ]
  deps = [
    "//chrome/browser:resource_prefetch_predictor_proto",
+    "//chrome/services/speech:buildflags",
    "//components/feature_engagement:buildflags",
+    "//components/optimization_guide/proto:optimization_guide_proto",
  ]

  if (is_linux) {
@@ -82,6 +93,14 @@ static_library("chrome") {
    ]
  }

+  if (is_win) {
+    sources += [
+      "//chrome/browser/win/icon_reader_service.cc",
+      "//chrome/browser/win/icon_reader_service.h",
+    ]
+    public_deps += [ "//chrome/services/util_win:lib" ]
+  }
+
  if (enable_desktop_capturer) {
    sources += [
      "//chrome/browser/media/webrtc/desktop_media_list.h",
@@ -104,11 +123,15 @@ static_library("chrome") {
    ]

    if (use_aura) {
-      sources += [
-        "//chrome/browser/platform_util_aura.cc",
-        "//chrome/browser/ui/views/color_chooser_aura.cc",
-        "//chrome/browser/ui/views/color_chooser_aura.h",
-      ]
+      sources += [ "//chrome/browser/platform_util_aura.cc" ]
+
+      if (!is_win) {
+        sources += [
+          "//chrome/browser/ui/views/color_chooser_aura.cc",
+          "//chrome/browser/ui/views/color_chooser_aura.h",
+        ]
+      }
+
      deps += [ "//components/feature_engagement" ]
    }

@@ -138,13 +161,6 @@ static_library("chrome") {
    }
  }

-  if (enable_tts) {
-    sources += [
-      "//chrome/browser/speech/tts_controller_delegate_impl.cc",
-      "//chrome/browser/speech/tts_controller_delegate_impl.h",
-    ]
-  }
-
  if (enable_widevine) {
    sources += [
      "//chrome/renderer/media/chrome_key_systems.cc",
@@ -179,9 +195,9 @@ static_library("chrome") {
      "//chrome/services/printing:lib",
      "//components/printing/browser",
      "//components/printing/renderer",
-      "//components/services/pdf_compositor",
-      "//components/services/pdf_compositor/public/cpp",
-      "//components/services/pdf_compositor/public/mojom",
+      "//components/services/print_compositor",
+      "//components/services/print_compositor/public/cpp",
+      "//components/services/print_compositor/public/mojom",
    ]

    deps += [
@@ -224,4 +240,165 @@ static_library("chrome") {
      "//components/vector_icons:vector_icons",
    ]
  }
+
+  if (enable_electron_extensions) {
+    sources += [
+      "//chrome/browser/extensions/chrome_url_request_util.cc",
+      "//chrome/browser/extensions/chrome_url_request_util.h",
+      "//chrome/browser/plugins/plugin_response_interceptor_url_loader_throttle.cc",
+      "//chrome/browser/plugins/plugin_response_interceptor_url_loader_throttle.h",
+      "//chrome/renderer/extensions/extension_hooks_delegate.cc",
+      "//chrome/renderer/extensions/extension_hooks_delegate.h",
+      "//chrome/renderer/extensions/tabs_hooks_delegate.cc",
+      "//chrome/renderer/extensions/tabs_hooks_delegate.h",
+    ]
+
+    if (enable_pdf_viewer) {
+      sources += [
+        "//chrome/browser/pdf/pdf_extension_util.cc",
+        "//chrome/browser/pdf/pdf_extension_util.h",
+        "//chrome/renderer/pepper/chrome_pdf_print_client.cc",
+        "//chrome/renderer/pepper/chrome_pdf_print_client.h",
+      ]
+    }
+  }
+}
+
+source_set("plugins") {
+  sources = []
+  deps = []
+  libs = []
+
+  # browser side
+  sources += [
+    "//chrome/browser/renderer_host/pepper/chrome_browser_pepper_host_factory.cc",
+    "//chrome/browser/renderer_host/pepper/chrome_browser_pepper_host_factory.h",
+    "//chrome/browser/renderer_host/pepper/pepper_broker_message_filter.cc",
+    "//chrome/browser/renderer_host/pepper/pepper_broker_message_filter.h",
+    "//chrome/browser/renderer_host/pepper/pepper_isolated_file_system_message_filter.cc",
+    "//chrome/browser/renderer_host/pepper/pepper_isolated_file_system_message_filter.h",
+  ]
+  deps += [
+    "//media:media_buildflags",
+    "//ppapi/buildflags",
+    "//ppapi/proxy:ipc",
+    "//services/device/public/mojom",
+  ]
+  if (enable_pdf_viewer) {
+    deps += [ "//components/pdf/browser" ]
+  }
+  if (enable_pepper_flash) {
+    sources += [
+      "//chrome/browser/renderer_host/pepper/pepper_flash_browser_host.cc",
+      "//chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h",
+      "//chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.cc",
+      "//chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.h",
+      "//chrome/browser/renderer_host/pepper/pepper_flash_drm_host.cc",
+      "//chrome/browser/renderer_host/pepper/pepper_flash_drm_host.h",
+    ]
+    if (is_mac) {
+      sources += [
+        "//chrome/browser/renderer_host/pepper/monitor_finder_mac.h",
+        "//chrome/browser/renderer_host/pepper/monitor_finder_mac.mm",
+      ]
+      libs += [ "CoreGraphics.framework" ]
+    }
+    if (is_linux) {
+      deps += [ "//components/services/font/public/cpp" ]
+    }
+  }
+
+  # renderer side
+  sources += [
+    "//chrome/renderer/pepper/chrome_renderer_pepper_host_factory.cc",
+    "//chrome/renderer/pepper/chrome_renderer_pepper_host_factory.h",
+    "//chrome/renderer/pepper/pepper_shared_memory_message_filter.cc",
+    "//chrome/renderer/pepper/pepper_shared_memory_message_filter.h",
+  ]
+  if (enable_pepper_flash) {
+    sources += [
+      "//chrome/renderer/pepper/pepper_flash_drm_renderer_host.cc",
+      "//chrome/renderer/pepper/pepper_flash_drm_renderer_host.h",
+      "//chrome/renderer/pepper/pepper_flash_fullscreen_host.cc",
+      "//chrome/renderer/pepper/pepper_flash_fullscreen_host.h",
+      "//chrome/renderer/pepper/pepper_flash_menu_host.cc",
+      "//chrome/renderer/pepper/pepper_flash_menu_host.h",
+      "//chrome/renderer/pepper/pepper_flash_renderer_host.cc",
+      "//chrome/renderer/pepper/pepper_flash_renderer_host.h",
+    ]
+  }
+  if (enable_pepper_flash || enable_pdf_viewer) {
+    sources += [
+      "//chrome/renderer/pepper/pepper_flash_font_file_host.cc",
+      "//chrome/renderer/pepper/pepper_flash_font_file_host.h",
+    ]
+    if (enable_pdf_viewer) {
+      deps += [ "//components/pdf/renderer" ]
+    }
+  }
+  deps += [
+    "//components/strings",
+    "//media:media_buildflags",
+    "//ppapi/host",
+    "//ppapi/proxy",
+    "//ppapi/proxy:ipc",
+    "//ppapi/shared_impl",
+    "//skia",
+  ]
+}
+
+# This source set is just so we don't have to depend on all of //chrome/browser
+# You may have to add new files here during the upgrade if //chrome/browser/spellchecker
+# gets more files
+source_set("chrome_spellchecker") {
+  sources = []
+  deps = []
+  libs = []
+
+  if (enable_builtin_spellchecker) {
+    sources += [
+      "//chrome/browser/spellchecker/spell_check_host_chrome_impl.cc",
+      "//chrome/browser/spellchecker/spell_check_host_chrome_impl.h",
+      "//chrome/browser/spellchecker/spellcheck_custom_dictionary.cc",
+      "//chrome/browser/spellchecker/spellcheck_custom_dictionary.h",
+      "//chrome/browser/spellchecker/spellcheck_factory.cc",
+      "//chrome/browser/spellchecker/spellcheck_factory.h",
+      "//chrome/browser/spellchecker/spellcheck_hunspell_dictionary.cc",
+      "//chrome/browser/spellchecker/spellcheck_hunspell_dictionary.h",
+      "//chrome/browser/spellchecker/spellcheck_language_blacklist_policy_handler.cc",
+      "//chrome/browser/spellchecker/spellcheck_language_blacklist_policy_handler.h",
+      "//chrome/browser/spellchecker/spellcheck_language_policy_handler.cc",
+      "//chrome/browser/spellchecker/spellcheck_language_policy_handler.h",
+      "//chrome/browser/spellchecker/spellcheck_service.cc",
+      "//chrome/browser/spellchecker/spellcheck_service.h",
+      "//chrome/common/pref_names.h",
+    ]
+
+    if (has_spellcheck_panel) {
+      sources += [
+        "//chrome/browser/spellchecker/spell_check_panel_host_impl.cc",
+        "//chrome/browser/spellchecker/spell_check_panel_host_impl.h",
+      ]
+    }
+
+    if (use_browser_spellchecker) {
+      sources += [
+        "//chrome/browser/spellchecker/spelling_request.cc",
+        "//chrome/browser/spellchecker/spelling_request.h",
+      ]
+    }
+
+    deps += [
+      "//base:base_static",
+      "//components/language/core/browser",
+      "//components/spellcheck:buildflags",
+      "//components/sync",
+    ]
+  }
+
+  public_deps = [
+    "//components/spellcheck/browser",
+    "//components/spellcheck/common",
+    "//components/spellcheck/renderer",
+  ]
 }
--- a/chromium_src/chrome/browser/certificate_manager_model.cc
+++ b/chromium_src/chrome/browser/certificate_manager_model.cc
@@ -36,11 +36,10 @@ net::NSSCertDatabase* GetNSSCertDatabaseForResourceContext(
    // Linux has only a single persistent slot compared to ChromeOS's separate
    // public and private slot.
    // Redirect any slot usage to this persistent slot on Linux.
+    crypto::EnsureNSSInit();
    g_nss_cert_database = new net::NSSCertDatabase(
-        crypto::ScopedPK11Slot(
-            crypto::GetPersistentNSSKeySlot()) /* public slot */,
-        crypto::ScopedPK11Slot(
-            crypto::GetPersistentNSSKeySlot()) /* private slot */);
+        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* public slot */,
+        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* private slot */);
  }
  return g_nss_cert_database;
 }
@@ -71,12 +70,12 @@ net::NSSCertDatabase* GetNSSCertDatabaseForResourceContext(

 // static
 void CertificateManagerModel::Create(content::BrowserContext* browser_context,
-                                     const CreationCallback& callback) {
+                                     CreationCallback callback) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  base::PostTask(
-      FROM_HERE, {BrowserThread::IO},
-      base::BindOnce(&CertificateManagerModel::GetCertDBOnIOThread,
-                     browser_context->GetResourceContext(), callback));
+  base::PostTask(FROM_HERE, {BrowserThread::IO},
+                 base::BindOnce(&CertificateManagerModel::GetCertDBOnIOThread,
+                                browser_context->GetResourceContext(),
+                                std::move(callback)));
 }

 CertificateManagerModel::CertificateManagerModel(
@@ -131,17 +130,17 @@ bool CertificateManagerModel::Delete(CERTCertificate* cert) {
 void CertificateManagerModel::DidGetCertDBOnUIThread(
    net::NSSCertDatabase* cert_db,
    bool is_user_db_available,
-    const CreationCallback& callback) {
+    CreationCallback callback) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  std::unique_ptr<CertificateManagerModel> model(
      new CertificateManagerModel(cert_db, is_user_db_available));
-  callback.Run(std::move(model));
+  std::move(callback).Run(std::move(model));
 }

 // static
 void CertificateManagerModel::DidGetCertDBOnIOThread(
-    const CreationCallback& callback,
+    CreationCallback callback,
    net::NSSCertDatabase* cert_db) {
  DCHECK_CURRENTLY_ON(BrowserThread::IO);

@@ -149,17 +148,24 @@ void CertificateManagerModel::DidGetCertDBOnIOThread(
  base::PostTask(
      FROM_HERE, {BrowserThread::UI},
      base::BindOnce(&CertificateManagerModel::DidGetCertDBOnUIThread, cert_db,
-                     is_user_db_available, callback));
+                     is_user_db_available, std::move(callback)));
 }

 // static
 void CertificateManagerModel::GetCertDBOnIOThread(
    content::ResourceContext* context,
-    const CreationCallback& callback) {
+    CreationCallback callback) {
  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  net::NSSCertDatabase* cert_db = GetNSSCertDatabaseForResourceContext(
-      context, base::BindOnce(&CertificateManagerModel::DidGetCertDBOnIOThread,
-                              callback));
+
+  auto did_get_cert_db_callback = base::AdaptCallbackForRepeating(
+      base::BindOnce(&CertificateManagerModel::DidGetCertDBOnIOThread,
+                     std::move(callback)));
+
+  net::NSSCertDatabase* cert_db =
+      GetNSSCertDatabaseForResourceContext(context, did_get_cert_db_callback);
+
+  // If the NSS database was already available, |cert_db| is non-null and
+  // |did_get_cert_db_callback| has not been called. Call it explicitly.
  if (cert_db)
-    DidGetCertDBOnIOThread(callback, cert_db);
+    did_get_cert_db_callback.Run(cert_db);
 }
--- a/chromium_src/chrome/browser/certificate_manager_model.h
+++ b/chromium_src/chrome/browser/certificate_manager_model.h
@@ -24,14 +24,14 @@ class ResourceContext;
 // manager dialog, and processes changes from the view.
 class CertificateManagerModel {
 public:
-  typedef base::Callback<void(std::unique_ptr<CertificateManagerModel>)>
-      CreationCallback;
+  using CreationCallback =
+      base::OnceCallback<void(std::unique_ptr<CertificateManagerModel>)>;

  // Creates a CertificateManagerModel. The model will be passed to the callback
  // when it is ready. The caller must ensure the model does not outlive the
  // |browser_context|.
  static void Create(content::BrowserContext* browser_context,
-                     const CreationCallback& callback);
+                     CreationCallback callback);

  ~CertificateManagerModel();

@@ -100,11 +100,11 @@ class CertificateManagerModel {
  // file for details.
  static void DidGetCertDBOnUIThread(net::NSSCertDatabase* cert_db,
                                     bool is_user_db_available,
-                                     const CreationCallback& callback);
-  static void DidGetCertDBOnIOThread(const CreationCallback& callback,
+                                     CreationCallback callback);
+  static void DidGetCertDBOnIOThread(CreationCallback callback,
                                     net::NSSCertDatabase* cert_db);
  static void GetCertDBOnIOThread(content::ResourceContext* context,
-                                  const CreationCallback& callback);
+                                  CreationCallback callback);

  net::NSSCertDatabase* cert_db_;
  // Whether the certificate database has a public slot associated with the
--- a/chromium_src/chrome/browser/process_singleton_posix.cc
+++ b/chromium_src/chrome/browser/process_singleton_posix.cc
@@ -56,7 +56,7 @@
 #include <stddef.h>

 #include "shell/browser/browser.h"
-#include "shell/common/atom_command_line.h"
+#include "shell/common/electron_command_line.h"

 #include "base/base_paths.h"
 #include "base/bind.h"
@@ -68,7 +68,6 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
@@ -826,11 +825,10 @@ ProcessSingleton::NotifyResult ProcessSingleton::NotifyOtherProcessWithTimeout(
    return PROCESS_NONE;
  to_send.append(current_dir.value());

-  const std::vector<std::string>& argv = electron::AtomCommandLine::argv();
-  for (std::vector<std::string>::const_iterator it = argv.begin();
-       it != argv.end(); ++it) {
+  const std::vector<std::string>& argv = electron::ElectronCommandLine::argv();
+  for (const auto& arg : argv) {
    to_send.push_back(kTokenDelimiter);
-    to_send.append(*it);
+    to_send.append(arg);
  }

  // Send the message
--- a/chromium_src/chrome/browser/process_singleton_win.cc
+++ b/chromium_src/chrome/browser/process_singleton_win.cc
@@ -197,7 +197,7 @@ ProcessSingleton::NotifyResult ProcessSingleton::NotifyOtherProcess() {
    return PROCESS_NONE;
  }

-  switch (chrome::AttemptToNotifyRunningChrome(remote_window_, false)) {
+  switch (chrome::AttemptToNotifyRunningChrome(remote_window_)) {
    case chrome::NOTIFY_SUCCESS:
      return PROCESS_NOTIFIED;
    case chrome::NOTIFY_FAILED:
--- a/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc
+++ b/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc
@@ -24,18 +24,18 @@ GlobalMenuBarRegistrarX11* GlobalMenuBarRegistrarX11::GetInstance() {
  return base::Singleton<GlobalMenuBarRegistrarX11>::get();
 }

-void GlobalMenuBarRegistrarX11::OnWindowMapped(unsigned long xid) {
-  live_xids_.insert(xid);
+void GlobalMenuBarRegistrarX11::OnWindowMapped(x11::Window window) {
+  live_windows_.insert(window);

  if (registrar_proxy_)
-    RegisterXID(xid);
+    RegisterXWindow(window);
 }

-void GlobalMenuBarRegistrarX11::OnWindowUnmapped(unsigned long xid) {
+void GlobalMenuBarRegistrarX11::OnWindowUnmapped(x11::Window window) {
  if (registrar_proxy_)
-    UnregisterXID(xid);
+    UnregisterXWindow(window);

-  live_xids_.erase(xid);
+  live_windows_.erase(window);
 }

 GlobalMenuBarRegistrarX11::GlobalMenuBarRegistrarX11()
@@ -63,9 +63,9 @@ GlobalMenuBarRegistrarX11::~GlobalMenuBarRegistrarX11() {
  }
 }

-void GlobalMenuBarRegistrarX11::RegisterXID(unsigned long xid) {
+void GlobalMenuBarRegistrarX11::RegisterXWindow(x11::Window window) {
  DCHECK(registrar_proxy_);
-  std::string path = electron::GlobalMenuBarX11::GetPathForWindow(xid);
+  std::string path = electron::GlobalMenuBarX11::GetPathForWindow(window);

  ANNOTATE_SCOPED_MEMORY_LEAK;  // http://crbug.com/314087
  // TODO(erg): The mozilla implementation goes to a lot of callback trouble
@@ -76,13 +76,13 @@ void GlobalMenuBarRegistrarX11::RegisterXID(unsigned long xid) {
  // I don't see any reason why we should care if "RegisterWindow" completes or
  // not.
  g_dbus_proxy_call(registrar_proxy_, "RegisterWindow",
-                    g_variant_new("(uo)", xid, path.c_str()),
+                    g_variant_new("(uo)", window, path.c_str()),
                    G_DBUS_CALL_FLAGS_NONE, -1, nullptr, nullptr, nullptr);
 }

-void GlobalMenuBarRegistrarX11::UnregisterXID(unsigned long xid) {
+void GlobalMenuBarRegistrarX11::UnregisterXWindow(x11::Window window) {
  DCHECK(registrar_proxy_);
-  std::string path = electron::GlobalMenuBarX11::GetPathForWindow(xid);
+  std::string path = electron::GlobalMenuBarX11::GetPathForWindow(window);

  ANNOTATE_SCOPED_MEMORY_LEAK;  // http://crbug.com/314087
  // TODO(erg): The mozilla implementation goes to a lot of callback trouble
@@ -93,7 +93,7 @@ void GlobalMenuBarRegistrarX11::UnregisterXID(unsigned long xid) {
  // I don't see any reason why we should care if "UnregisterWindow" completes
  // or not.
  g_dbus_proxy_call(registrar_proxy_, "UnregisterWindow",
-                    g_variant_new("(u)", xid), G_DBUS_CALL_FLAGS_NONE, -1,
+                    g_variant_new("(u)", window), G_DBUS_CALL_FLAGS_NONE, -1,
                    nullptr, nullptr, nullptr);
 }

@@ -120,10 +120,9 @@ void GlobalMenuBarRegistrarX11::OnProxyCreated(GObject* source,

 void GlobalMenuBarRegistrarX11::OnNameOwnerChanged(GObject* /* ignored */,
                                                   GParamSpec* /* ignored */) {
-  // If the name owner changed, we need to reregister all the live xids with
-  // the system.
-  for (std::set<unsigned long>::const_iterator it = live_xids_.begin();
-       it != live_xids_.end(); ++it) {
-    RegisterXID(*it);
+  // If the name owner changed, we need to reregister all the live x11::Window
+  // with the system.
+  for (const auto& window : live_windows_) {
+    RegisterXWindow(window);
  }
 }
--- a/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h
+++ b/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.h
@@ -12,19 +12,20 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "ui/base/glib/glib_signal.h"
+#include "ui/gfx/x/xproto.h"

 // Advertises our menu bars to Unity.
 //
 // GlobalMenuBarX11 is responsible for managing the DbusmenuServer for each
-// XID. We need a separate object to own the dbus channel to
+// x11::Window. We need a separate object to own the dbus channel to
 // com.canonical.AppMenu.Registrar and to register/unregister the mapping
-// between a XID and the DbusmenuServer instance we are offering.
+// between a x11::Window and the DbusmenuServer instance we are offering.
 class GlobalMenuBarRegistrarX11 {
 public:
  static GlobalMenuBarRegistrarX11* GetInstance();

-  void OnWindowMapped(unsigned long xid);
-  void OnWindowUnmapped(unsigned long xid);
+  void OnWindowMapped(x11::Window window);
+  void OnWindowUnmapped(x11::Window window);

 private:
  friend struct base::DefaultSingletonTraits<GlobalMenuBarRegistrarX11>;
@@ -33,8 +34,8 @@ class GlobalMenuBarRegistrarX11 {
  ~GlobalMenuBarRegistrarX11();

  // Sends the actual message.
-  void RegisterXID(unsigned long xid);
-  void UnregisterXID(unsigned long xid);
+  void RegisterXWindow(x11::Window window);
+  void UnregisterXWindow(x11::Window window);

  CHROMEG_CALLBACK_1(GlobalMenuBarRegistrarX11,
                     void,
@@ -49,9 +50,9 @@ class GlobalMenuBarRegistrarX11 {

  GDBusProxy* registrar_proxy_;

-  // Window XIDs which want to be registered, but haven't yet been because
+  // x11::Window which want to be registered, but haven't yet been because
  // we're waiting for the proxy to become available.
-  std::set<unsigned long> live_xids_;
+  std::set<x11::Window> live_windows_;

  DISALLOW_COPY_AND_ASSIGN(GlobalMenuBarRegistrarX11);
 };
--- a/components/pepper_flash/BUILD.gn
+++ b/components/pepper_flash/BUILD.gn
@@ -1,62 +0,0 @@
-# Copyright (c) 2018 GitHub, Inc.
-# Use of this source code is governed by the MIT license that can be
-# found in the LICENSE file.
-
-component("pepper_flash") {
-  visibility = [ "//electron:electron_lib" ]
-  defines = [ "IS_PEPPER_FLASH_IMPL" ]
-  sources = [
-    "//chrome/browser/renderer_host/pepper/chrome_browser_pepper_host_factory.cc",
-    "//chrome/browser/renderer_host/pepper/chrome_browser_pepper_host_factory.h",
-    "//chrome/browser/renderer_host/pepper/pepper_broker_message_filter.cc",
-    "//chrome/browser/renderer_host/pepper/pepper_broker_message_filter.h",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_browser_host.cc",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.cc",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_clipboard_message_filter.h",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_drm_host.cc",
-    "//chrome/browser/renderer_host/pepper/pepper_flash_drm_host.h",
-    "//chrome/browser/renderer_host/pepper/pepper_isolated_file_system_message_filter.cc",
-    "//chrome/browser/renderer_host/pepper/pepper_isolated_file_system_message_filter.h",
-    "//chrome/renderer/pepper/chrome_renderer_pepper_host_factory.cc",
-    "//chrome/renderer/pepper/chrome_renderer_pepper_host_factory.h",
-    "//chrome/renderer/pepper/pepper_flash_drm_renderer_host.cc",
-    "//chrome/renderer/pepper/pepper_flash_drm_renderer_host.h",
-    "//chrome/renderer/pepper/pepper_flash_font_file_host.cc",
-    "//chrome/renderer/pepper/pepper_flash_font_file_host.h",
-    "//chrome/renderer/pepper/pepper_flash_fullscreen_host.cc",
-    "//chrome/renderer/pepper/pepper_flash_fullscreen_host.h",
-    "//chrome/renderer/pepper/pepper_flash_menu_host.cc",
-    "//chrome/renderer/pepper/pepper_flash_menu_host.h",
-    "//chrome/renderer/pepper/pepper_flash_renderer_host.cc",
-    "//chrome/renderer/pepper/pepper_flash_renderer_host.h",
-    "//chrome/renderer/pepper/pepper_helper.cc",
-    "//chrome/renderer/pepper/pepper_helper.h",
-    "//chrome/renderer/pepper/pepper_shared_memory_message_filter.cc",
-    "//chrome/renderer/pepper/pepper_shared_memory_message_filter.h",
-  ]
-  deps = [
-    "//content/public/browser",
-    "//content/public/renderer",
-    "//media:media_buildflags",
-    "//ppapi/host",
-    "//ppapi/proxy",
-    "//ppapi/proxy:ipc",
-    "//ppapi/shared_impl",
-    "//services/device/public/mojom",
-    "//skia",
-    "//third_party/adobe/flash:flapper_version_h",
-    "//ui/base",
-    "//ui/base/clipboard",
-  ]
-  if (is_mac) {
-    sources += [
-      "//chrome/browser/renderer_host/pepper/monitor_finder_mac.h",
-      "//chrome/browser/renderer_host/pepper/monitor_finder_mac.mm",
-    ]
-    libs = [ "CoreGraphics.framework" ]
-  }
-  if (is_linux) {
-    deps += [ "//components/services/font/public/cpp" ]
-  }
-}
--- a/default_app/default_app.ts
+++ b/default_app/default_app.ts
@@ -1,54 +1,54 @@
-import { app, dialog, BrowserWindow, shell, ipcMain } from 'electron'
-import * as path from 'path'
+import { app, dialog, BrowserWindow, shell, ipcMain } from 'electron';
+import * as path from 'path';
+import * as url from 'url';

-let mainWindow: BrowserWindow | null = null
+let mainWindow: BrowserWindow | null = null;

 // Quit when all windows are closed.
 app.on('window-all-closed', () => {
-  app.quit()
-})
+  app.quit();
+});

 function decorateURL (url: string) {
  // safely add `?utm_source=default_app
-  const parsedUrl = new URL(url)
-  parsedUrl.searchParams.append('utm_source', 'default_app')
-  return parsedUrl.toString()
+  const parsedUrl = new URL(url);
+  parsedUrl.searchParams.append('utm_source', 'default_app');
+  return parsedUrl.toString();
 }

 // Find the shortest path to the electron binary
-const absoluteElectronPath = process.execPath
-const relativeElectronPath = path.relative(process.cwd(), absoluteElectronPath)
+const absoluteElectronPath = process.execPath;
+const relativeElectronPath = path.relative(process.cwd(), absoluteElectronPath);
 const electronPath = absoluteElectronPath.length < relativeElectronPath.length
  ? absoluteElectronPath
-  : relativeElectronPath
+  : relativeElectronPath;

-const indexPath = path.resolve(app.getAppPath(), 'index.html')
+const indexPath = path.resolve(app.getAppPath(), 'index.html');

 function isTrustedSender (webContents: Electron.WebContents) {
  if (webContents !== (mainWindow && mainWindow.webContents)) {
-    return false
+    return false;
  }

-  const parsedUrl = new URL(webContents.getURL())
-  const urlPath = process.platform === 'win32'
-    // Strip the prefixed "/" that occurs on windows
-    ? path.resolve(parsedUrl.pathname.substr(1))
-    : parsedUrl.pathname
-  return parsedUrl.protocol === 'file:' && urlPath === indexPath
+  try {
+    return url.fileURLToPath(webContents.getURL()) === indexPath;
+  } catch {
+    return false;
+  }
 }

 ipcMain.handle('bootstrap', (event) => {
-  return isTrustedSender(event.sender) ? electronPath : null
-})
+  return isTrustedSender(event.sender) ? electronPath : null;
+});

 async function createWindow () {
-  await app.whenReady()
+  await app.whenReady();

  const options: Electron.BrowserWindowConstructorOptions = {
-    width: 900,
-    height: 600,
+    width: 960,
+    height: 620,
    autoHideMenuBar: true,
-    backgroundColor: '#FFFFFF',
+    backgroundColor: '#2f3241',
    webPreferences: {
      preload: path.resolve(__dirname, 'preload.js'),
      contextIsolation: true,
@@ -57,46 +57,46 @@ async function createWindow () {
    },
    useContentSize: true,
    show: false
-  }
+  };

  if (process.platform === 'linux') {
-    options.icon = path.join(__dirname, 'icon.png')
+    options.icon = path.join(__dirname, 'icon.png');
  }

-  mainWindow = new BrowserWindow(options)
-  mainWindow.on('ready-to-show', () => mainWindow!.show())
+  mainWindow = new BrowserWindow(options);
+  mainWindow.on('ready-to-show', () => mainWindow!.show());

  mainWindow.webContents.on('new-window', (event, url) => {
-    event.preventDefault()
-    shell.openExternal(decorateURL(url))
-  })
+    event.preventDefault();
+    shell.openExternal(decorateURL(url));
+  });

  mainWindow.webContents.session.setPermissionRequestHandler((webContents, permission, done) => {
-    const parsedUrl = new URL(webContents.getURL())
+    const parsedUrl = new URL(webContents.getURL());

    const options: Electron.MessageBoxOptions = {
      title: 'Permission Request',
      message: `Allow '${parsedUrl.origin}' to access '${permission}'?`,
      buttons: ['OK', 'Cancel'],
      cancelId: 1
-    }
+    };

    dialog.showMessageBox(mainWindow!, options).then(({ response }) => {
-      done(response === 0)
-    })
-  })
+      done(response === 0);
+    });
+  });

-  return mainWindow
+  return mainWindow;
 }

 export const loadURL = async (appUrl: string) => {
-  mainWindow = await createWindow()
-  mainWindow.loadURL(appUrl)
-  mainWindow.focus()
-}
+  mainWindow = await createWindow();
+  mainWindow.loadURL(appUrl);
+  mainWindow.focus();
+};

 export const loadFile = async (appPath: string) => {
-  mainWindow = await createWindow()
-  mainWindow.loadFile(appPath)
-  mainWindow.focus()
-}
+  mainWindow = await createWindow();
+  mainWindow.loadFile(appPath);
+  mainWindow.focus();
+};
--- a/default_app/main.ts
+++ b/default_app/main.ts
@@ -1,8 +1,8 @@
-import { app, dialog } from 'electron'
+import { app, dialog } from 'electron';

-import * as fs from 'fs'
-import * as path from 'path'
-import * as url from 'url'
+import * as fs from 'fs';
+import * as path from 'path';
+import * as url from 'url';

 type DefaultAppOptions = {
  file: null | string;
@@ -14,10 +14,10 @@ type DefaultAppOptions = {
  modules: string[];
 }

-const Module = require('module')
+const Module = require('module');

 // Parse command line options.
-const argv = process.argv.slice(1)
+const argv = process.argv.slice(1);

 const option: DefaultAppOptions = {
  file: null,
@@ -27,50 +27,50 @@ const option: DefaultAppOptions = {
  interactive: false,
  abi: false,
  modules: []
-}
+};

-let nextArgIsRequire = false
+let nextArgIsRequire = false;

 for (const arg of argv) {
  if (nextArgIsRequire) {
-    option.modules.push(arg)
-    nextArgIsRequire = false
-    continue
+    option.modules.push(arg);
+    nextArgIsRequire = false;
+    continue;
  } else if (arg === '--version' || arg === '-v') {
-    option.version = true
-    break
+    option.version = true;
+    break;
  } else if (arg.match(/^--app=/)) {
-    option.file = arg.split('=')[1]
-    break
+    option.file = arg.split('=')[1];
+    break;
  } else if (arg === '--interactive' || arg === '-i' || arg === '-repl') {
-    option.interactive = true
+    option.interactive = true;
  } else if (arg === '--test-type=webdriver') {
-    option.webdriver = true
+    option.webdriver = true;
  } else if (arg === '--require' || arg === '-r') {
-    nextArgIsRequire = true
-    continue
+    nextArgIsRequire = true;
+    continue;
  } else if (arg === '--abi' || arg === '-a') {
-    option.abi = true
-    continue
+    option.abi = true;
+    continue;
  } else if (arg === '--no-help') {
-    option.noHelp = true
-    continue
+    option.noHelp = true;
+    continue;
  } else if (arg[0] === '-') {
-    continue
+    continue;
  } else {
-    option.file = arg
-    break
+    option.file = arg;
+    break;
  }
 }

 if (nextArgIsRequire) {
-  console.error('Invalid Usage: --require [file]\n\n"file" is required')
-  process.exit(1)
+  console.error('Invalid Usage: --require [file]\n\n"file" is required');
+  process.exit(1);
 }

 // Set up preload modules
 if (option.modules.length > 0) {
-  Module._preloadModules(option.modules)
+  Module._preloadModules(option.modules);
 }

 function loadApplicationPackage (packagePath: string) {
@@ -79,102 +79,102 @@ function loadApplicationPackage (packagePath: string) {
    configurable: false,
    enumerable: true,
    value: true
-  })
+  });

  try {
    // Override app name and version.
-    packagePath = path.resolve(packagePath)
-    const packageJsonPath = path.join(packagePath, 'package.json')
-    let appPath
+    packagePath = path.resolve(packagePath);
+    const packageJsonPath = path.join(packagePath, 'package.json');
+    let appPath;
    if (fs.existsSync(packageJsonPath)) {
-      let packageJson
+      let packageJson;
      try {
-        packageJson = require(packageJsonPath)
+        packageJson = require(packageJsonPath);
      } catch (e) {
-        showErrorMessage(`Unable to parse ${packageJsonPath}\n\n${e.message}`)
-        return
+        showErrorMessage(`Unable to parse ${packageJsonPath}\n\n${e.message}`);
+        return;
      }

      if (packageJson.version) {
-        app.setVersion(packageJson.version)
+        app.setVersion(packageJson.version);
      }
      if (packageJson.productName) {
-        app.name = packageJson.productName
+        app.name = packageJson.productName;
      } else if (packageJson.name) {
-        app.name = packageJson.name
+        app.name = packageJson.name;
      }
-      appPath = packagePath
+      appPath = packagePath;
    }

    try {
-      const filePath = Module._resolveFilename(packagePath, module, true)
-      app._setDefaultAppPaths(appPath || path.dirname(filePath))
+      const filePath = Module._resolveFilename(packagePath, module, true);
+      app._setDefaultAppPaths(appPath || path.dirname(filePath));
    } catch (e) {
-      showErrorMessage(`Unable to find Electron app at ${packagePath}\n\n${e.message}`)
-      return
+      showErrorMessage(`Unable to find Electron app at ${packagePath}\n\n${e.message}`);
+      return;
    }

    // Run the app.
-    Module._load(packagePath, module, true)
+    Module._load(packagePath, module, true);
  } catch (e) {
-    console.error('App threw an error during load')
-    console.error(e.stack || e)
-    throw e
+    console.error('App threw an error during load');
+    console.error(e.stack || e);
+    throw e;
  }
 }

 function showErrorMessage (message: string) {
-  app.focus()
-  dialog.showErrorBox('Error launching app', message)
-  process.exit(1)
+  app.focus();
+  dialog.showErrorBox('Error launching app', message);
+  process.exit(1);
 }

 async function loadApplicationByURL (appUrl: string) {
-  const { loadURL } = await import('./default_app')
-  loadURL(appUrl)
+  const { loadURL } = await import('./default_app');
+  loadURL(appUrl);
 }

 async function loadApplicationByFile (appPath: string) {
-  const { loadFile } = await import('./default_app')
-  loadFile(appPath)
+  const { loadFile } = await import('./default_app');
+  loadFile(appPath);
 }

 function startRepl () {
  if (process.platform === 'win32') {
-    console.error('Electron REPL not currently supported on Windows')
-    process.exit(1)
+    console.error('Electron REPL not currently supported on Windows');
+    process.exit(1);
  }

  // prevent quitting
-  app.on('window-all-closed', () => {})
+  app.on('window-all-closed', () => {});

-  const repl = require('repl')
+  const repl = require('repl');
  repl.start('> ').on('exit', () => {
-    process.exit(0)
-  })
+    process.exit(0);
+  });
 }

 // Start the specified app if there is one specified in command line, otherwise
 // start the default app.
 if (option.file && !option.webdriver) {
-  const file = option.file
-  const protocol = url.parse(file).protocol
-  const extension = path.extname(file)
+  const file = option.file;
+  const protocol = url.parse(file).protocol;
+  const extension = path.extname(file);
  if (protocol === 'http:' || protocol === 'https:' || protocol === 'file:' || protocol === 'chrome:') {
-    loadApplicationByURL(file)
+    loadApplicationByURL(file);
  } else if (extension === '.html' || extension === '.htm') {
-    loadApplicationByFile(path.resolve(file))
+    loadApplicationByFile(path.resolve(file));
  } else {
-    loadApplicationPackage(file)
+    loadApplicationPackage(file);
  }
 } else if (option.version) {
-  console.log('v' + process.versions.electron)
-  process.exit(0)
+  console.log('v' + process.versions.electron);
+  process.exit(0);
 } else if (option.abi) {
-  console.log(process.versions.modules)
-  process.exit(0)
+  console.log(process.versions.modules);
+  process.exit(0);
 } else if (option.interactive) {
-  startRepl()
+  startRepl();
 } else {
  if (!option.noHelp) {
    const welcomeMessage = `
@@ -192,10 +192,10 @@ Options:
  -i, --interactive     Open a REPL to the main process.
  -r, --require         Module to preload (option can be repeated).
  -v, --version         Print the version.
-  -a, --abi             Print the Node ABI version.`
+  -a, --abi             Print the Node ABI version.`;

-    console.log(welcomeMessage)
+    console.log(welcomeMessage);
  }

-  loadApplicationByFile('index.html')
+  loadApplicationByFile('index.html');
 }
--- a/default_app/preload.ts
+++ b/default_app/preload.ts
@@ -1,53 +1,53 @@
-import { ipcRenderer, contextBridge } from 'electron'
+import { ipcRenderer, contextBridge } from 'electron';

 async function getOcticonSvg (name: string) {
  try {
-    const response = await fetch(`octicon/${name}.svg`)
-    const div = document.createElement('div')
-    div.innerHTML = await response.text()
-    return div
+    const response = await fetch(`octicon/${name}.svg`);
+    const div = document.createElement('div');
+    div.innerHTML = await response.text();
+    return div;
  } catch {
-    return null
+    return null;
  }
 }

 async function loadSVG (element: HTMLSpanElement) {
  for (const cssClass of element.classList) {
    if (cssClass.startsWith('octicon-')) {
-      const icon = await getOcticonSvg(cssClass.substr(8))
+      const icon = await getOcticonSvg(cssClass.substr(8));
      if (icon) {
        for (const elemClass of element.classList) {
-          icon.classList.add(elemClass)
+          icon.classList.add(elemClass);
        }
-        element.before(icon)
-        element.remove()
-        break
+        element.before(icon);
+        element.remove();
+        break;
      }
    }
  }
 }

 async function initialize () {
-  const electronPath = await ipcRenderer.invoke('bootstrap')
+  const electronPath = await ipcRenderer.invoke('bootstrap');

  function replaceText (selector: string, text: string) {
-    const element = document.querySelector<HTMLElement>(selector)
+    const element = document.querySelector<HTMLElement>(selector);
    if (element) {
-      element.innerText = text
+      element.innerText = text;
    }
  }

-  replaceText('.electron-version', `Electron v${process.versions.electron}`)
-  replaceText('.chrome-version', `Chromium v${process.versions.chrome}`)
-  replaceText('.node-version', `Node v${process.versions.node}`)
-  replaceText('.v8-version', `v8 v${process.versions.v8}`)
-  replaceText('.command-example', `${electronPath} path-to-app`)
+  replaceText('.electron-version', `Electron v${process.versions.electron}`);
+  replaceText('.chrome-version', `Chromium v${process.versions.chrome}`);
+  replaceText('.node-version', `Node v${process.versions.node}`);
+  replaceText('.v8-version', `v8 v${process.versions.v8}`);
+  replaceText('.command-example', `${electronPath} path-to-app`);

  for (const element of document.querySelectorAll<HTMLSpanElement>('.octicon')) {
-    loadSVG(element)
+    loadSVG(element);
  }
 }

 contextBridge.exposeInMainWorld('electronDefaultApp', {
  initialize
-})
+});
--- a/default_app/styles.css
+++ b/default_app/styles.css
@@ -8,7 +8,7 @@ body {
 }

 .container {
-  margin: 15px 30px 30px 30px;
+  margin: 15px 30px;
  background-color: #2f3241;
  flex: 1;
  display: flex;
--- a/docs-translations/README.md
+++ b/docs-translations/README.md
@@ -1,33 +0,0 @@
-## Docs Translations
-
-This directory once contained unstructured translations of Electron's 
-documentation, but has been deprecated in favor of a new translation process 
-using [Crowdin], a GitHub-friendly platform for collaborative translation.
-
-For more details, visit the [electron/i18n] repo.
-
-## Contributing
-
-If you're interested in helping translate Electron's docs, visit 
-[Crowdin] and log in with your GitHub account. And thanks!
-
-## Offline Docs
-
-If you miss having access to Electron's raw markdown files in your preferred
-language, don't fret! You can still get raw docs, they're just in a 
-different place now. See [electron/i18n/tree/master/content]
-
-To more easily view and browse offline docs in your language, clone the repo and use [vmd], 
-an Electron-based GitHub-styled markdown viewer:
-
-```sh
-npm i -g vmd
-git clone https://github.com/electron/i18n
-vmd electron-i18n/content/zh-CN
-```
-
-[crowdin.com/project/electron]: https://crowdin.com/project/electron
-[Crowdin]: https://crowdin.com/project/electron
-[electron/i18n]: https://github.com/electron/i18n#readme
-[electron/i18n/tree/master/content]: https://github.com/electron/i18n/tree/master/content
-[vmd]: http://ghub.io/vmd
--- a/docs/README.md
+++ b/docs/README.md
@@ -18,7 +18,6 @@ an issue:

 ## Guides and Tutorials

-* [About Electron](tutorial/about.md)
 * [Setting up the Development Environment](tutorial/development-environment.md)
  * [Setting up macOS](tutorial/development-environment.md#setting-up-macos)
  * [Setting up Windows](tutorial/development-environment.md#setting-up-windows)
@@ -39,6 +38,7 @@ an issue:
  * [Using Electron's APIs](tutorial/application-architecture.md#using-electron-apis)
  * [Using Node.js APIs](tutorial/application-architecture.md#using-nodejs-apis)
  * [Using Native Node.js Modules](tutorial/using-native-node-modules.md)
+  * [Performance Strategies](tutorial/performance.md)
 * Adding Features to Your App
  * [Notifications](tutorial/notifications.md)
  * [Recent Documents](tutorial/recent-documents.md)
@@ -52,6 +52,7 @@ an issue:
  * [Native File Drag & Drop](tutorial/native-file-drag-drop.md)
  * [Offscreen Rendering](tutorial/offscreen-rendering.md)
  * [Supporting macOS Dark Mode](tutorial/mojave-dark-mode-guide.md)
+  * [Web embeds in Electron](tutorial/web-embeds.md)
 * [Accessibility](tutorial/accessibility.md)
  * [Spectron](tutorial/accessibility.md#spectron)
  * [Devtron](tutorial/accessibility.md#devtron)
@@ -110,7 +111,8 @@ These individual tutorials expand on topics discussed in the guide above.
 * [Process Object](api/process.md)
 * [Supported Command Line Switches](api/command-line-switches.md)
 * [Environment Variables](api/environment-variables.md)
-* [Breaking API Changes](api/breaking-changes.md)
+* [Chrome Extensions Support](api/extensions.md)
+* [Breaking API Changes](breaking-changes.md)

 ### Custom DOM Elements:

--- a/docs/api/accelerator.md
+++ b/docs/api/accelerator.md
@@ -18,7 +18,7 @@ method, i.e.
 ```javascript
 const { app, globalShortcut } = require('electron')

-app.on('ready', () => {
+app.whenReady().then(() => {
  // Register a 'CommandOrControl+Y' shortcut listener.
  globalShortcut.register('CommandOrControl+Y', () => {
    // Do stuff when Y and either Command/Control is pressed.
@@ -54,7 +54,7 @@ The `Super` key is mapped to the `Windows` key on Windows and Linux and
 * `0` to `9`
 * `A` to `Z`
 * `F1` to `F24`
-* Punctuations like `~`, `!`, `@`, `#`, `$`, etc.
+* Punctuation like `~`, `!`, `@`, `#`, `$`, etc.
 * `Plus`
 * `Space`
 * `Tab`
--- a/docs/api/app.md
+++ b/docs/api/app.md
@@ -32,12 +32,14 @@ In most cases, you should do everything in the `ready` event handler.

 Returns:

-* `launchInfo` unknown _macOS_
+* `event` Event
+* `launchInfo` Record<string, any> _macOS_

-Emitted when Electron has finished initializing. On macOS, `launchInfo` holds
-the `userInfo` of the `NSUserNotification` that was used to open the application,
-if it was launched from Notification Center. You can call `app.isReady()` to
-check if this event has already fired.
+Emitted once, when Electron has finished initializing. On macOS, `launchInfo`
+holds the `userInfo` of the `NSUserNotification` that was used to open the
+application, if it was launched from Notification Center. You can also call
+`app.isReady()` to check if this event has already fired and `app.whenReady()`
+to get a Promise that is fulfilled when Electron is initialized.

 ### Event: 'window-all-closed'

@@ -74,7 +76,7 @@ Returns:
 * `event` Event

 Emitted when all windows have been closed and the application will quit.
-Calling `event.preventDefault()` will prevent the default behaviour, which is
+Calling `event.preventDefault()` will prevent the default behavior, which is
 terminating the application.

 See the description of the `window-all-closed` event for the differences between
@@ -203,7 +205,7 @@ Returns:
  [`NSUserActivity.activityType`][activity-type].
 * `userInfo` unknown - Contains app-specific state stored by the activity.

-Emitted when [Handoff][handoff] is about to be resumed on another device. If you need to update the state to be transferred, you should call `event.preventDefault()` immediately, construct a new `userInfo` dictionary and call `app.updateCurrentActiviy()` in a timely manner. Otherwise, the operation will fail and `continue-activity-error` will be called.
+Emitted when [Handoff][handoff] is about to be resumed on another device. If you need to update the state to be transferred, you should call `event.preventDefault()` immediately, construct a new `userInfo` dictionary and call `app.updateCurrentActivity()` in a timely manner. Otherwise, the operation will fail and `continue-activity-error` will be called.

 ### Event: 'new-window-for-tab' _macOS_

@@ -314,10 +316,8 @@ Returns:

 * `event` Event
 * `webContents` [WebContents](web-contents.md)
-* `request` Object
-  * `method` String
+* `authenticationResponseDetails` Object
  * `url` URL
-  * `referrer` URL
 * `authInfo` Object
  * `isProxy` Boolean
  * `scheme` String
@@ -325,8 +325,8 @@ Returns:
  * `port` Integer
  * `realm` String
 * `callback` Function
-  * `username` String
-  * `password` String
+  * `username` String (optional)
+  * `password` String (optional)

 Emitted when `webContents` wants to do basic auth.

@@ -337,12 +337,16 @@ should prevent the default behavior with `event.preventDefault()` and call
 ```javascript
 const { app } = require('electron')

-app.on('login', (event, webContents, request, authInfo, callback) => {
+app.on('login', (event, webContents, details, authInfo, callback) => {
  event.preventDefault()
  callback('username', 'secret')
 })
 ```

+If `callback` is called without a username or password, the authentication
+request will be cancelled and the authentication error will be returned to the
+page.
+
 ### Event: 'gpu-info-update'

 Emitted whenever there is a GPU info update.
@@ -356,7 +360,7 @@ Returns:

 Emitted when the GPU process crashes or is killed.

-### Event: 'renderer-process-crashed'
+### Event: 'renderer-process-crashed' _Deprecated_

 Returns:

@@ -366,6 +370,30 @@ Returns:

 Emitted when the renderer process of `webContents` crashes or is killed.

+**Deprecated:** This event is superceded by the `render-process-gone` event
+which contains more information about why the render process dissapeared. It
+isn't always because it crashed.  The `killed` boolean can be replaced by
+checking `reason === 'killed'` when you switch to that event.
+
+#### Event: 'render-process-gone'
+
+Returns:
+
+* `event` Event
+* `webContents` [WebContents](web-contents.md)
+* `details` Object
+  * `reason` String - The reason the render process is gone.  Possible values:
+    * `clean-exit` - Process exited with an exit code of zero
+    * `abnormal-exit` - Process exited with a non-zero exit code
+    * `killed` - Process was sent a SIGTERM or otherwise killed externally
+    * `crashed` - Process crashed
+    * `oom` - Process ran out of memory
+    * `launch-failed` - Process never successfully launched
+    * `integrity-failure` - Windows code integrity checks failed
+
+Emitted when the renderer process unexpectedly dissapears.  This is normally
+because it was crashed or killed.
+
 ### Event: 'accessibility-support-changed' _macOS_ _Windows_

 Returns:
@@ -411,6 +439,8 @@ and `workingDirectory` is its current working directory. Usually
 applications respond to this by making their primary window focused and
 non-minimized.

+**Note:** If the second instance is started by a different user than the first, the `argv` array will not include the arguments.
+
 This event is guaranteed to be emitted after the `ready` event of `app`
 gets emitted.

@@ -485,18 +515,6 @@ Emitted when `remote.getCurrentWebContents()` is called in the renderer process
 Calling `event.preventDefault()` will prevent the object from being returned.
 Custom value can be returned by setting `event.returnValue`.

-### Event: 'remote-get-guest-web-contents'
-
-Returns:
-
-* `event` Event
-* `webContents` [WebContents](web-contents.md)
-* `guestWebContents` [WebContents](web-contents.md)
-
-Emitted when `<webview>.getWebContents()` is called in the renderer process of `webContents`.
-Calling `event.preventDefault()` will prevent the object from being returned.
-Custom value can be returned by setting `event.returnValue`.
-
 ## Methods

 The `app` object has the following methods:
@@ -555,6 +573,7 @@ app.exit(0)
 ### `app.isReady()`

 Returns `Boolean` - `true` if Electron has finished initializing, `false` otherwise.
+See also `app.whenReady()`.

 ### `app.whenReady()`

@@ -562,11 +581,17 @@ Returns `Promise<void>` - fulfilled when Electron is initialized.
 May be used as a convenient alternative to checking `app.isReady()`
 and subscribing to the `ready` event if the app is not ready yet.

-### `app.focus()`
+### `app.focus([options])`
+
+* `options` Object (optional)
+  * `steal` Boolean _macOS_ - Make the receiver the active app even if another app is
+  currently active.

 On Linux, focuses on the first visible window. On macOS, makes the application
 the active app. On Windows, focuses on the application's first window.

+You should seek to use the `steal` option as sparingly as possible.
+
 ### `app.hide()` _macOS_

 Hides all application windows without minimizing them.
@@ -608,8 +633,10 @@ Returns `String` - The current application directory.
  * `music` Directory for a user's music.
  * `pictures` Directory for a user's pictures.
  * `videos` Directory for a user's videos.
+  * `recent` Directory for the user's recent files (Windows only).
  * `logs` Directory for your app's log folder.
  * `pepperFlashSystemPlugin` Full path to the system version of the Pepper Flash plugin.
+  * `crashDumps` Directory where crash dumps are stored.

 Returns `String` - A path to a special directory or file associated with `name`. On
 failure, an `Error` is thrown.
@@ -667,8 +694,6 @@ to the npm modules spec. You should usually also specify a `productName`
 field, which is your application's full capitalized name, and which will be
 preferred over `name` by Electron.

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.setName(name)`

 * `name` String
@@ -677,8 +702,6 @@ Overrides the current application's name.

 **Note:** This function overrides the name used internally by Electron; it does not affect the name that the OS uses.

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.getLocale()`

 Returns `String` - The current application locale. Possible return values are documented [here](locales.md).
@@ -711,34 +734,34 @@ Clears the recent documents list.

 ### `app.setAsDefaultProtocolClient(protocol[, path, args])`

-* `protocol` String - The name of your protocol, without `://`. If you want your
-  app to handle `electron://` links, call this method with `electron` as the
-  parameter.
-* `path` String (optional) _Windows_ - Defaults to `process.execPath`
-* `args` String[] (optional) _Windows_ - Defaults to an empty array
+* `protocol` String - The name of your protocol, without `://`. For example,
+  if you want your app to handle `electron://` links, call this method with
+  `electron` as the parameter.
+* `path` String (optional) _Windows_ - The path to the Electron executable.
+  Defaults to `process.execPath`
+* `args` String[] (optional) _Windows_ - Arguments passed to the executable.
+  Defaults to an empty array

 Returns `Boolean` - Whether the call succeeded.

-This method sets the current executable as the default handler for a protocol
-(aka URI scheme). It allows you to integrate your app deeper into the operating
-system. Once registered, all links with `your-protocol://` will be opened with
-the current executable. The whole link, including protocol, will be passed to
-your application as a parameter.
-
-On Windows, you can provide optional parameters path, the path to your executable,
-and args, an array of arguments to be passed to your executable when it launches.
+Sets the current executable as the default handler for a protocol (aka URI
+scheme). It allows you to integrate your app deeper into the operating system.
+Once registered, all links with `your-protocol://` will be opened with the
+current executable. The whole link, including protocol, will be passed to your
+application as a parameter.

 **Note:** On macOS, you can only register protocols that have been added to
-your app's `info.plist`, which can not be modified at runtime. You can however
-change the file with a simple text editor or script during build time.
-Please refer to [Apple's documentation][CFBundleURLTypes] for details.
+your app's `info.plist`, which cannot be modified at runtime. However, you can
+change the file during build time via [Electron Forge][electron-forge],
+[Electron Packager][electron-packager], or by editing `info.plist` with a text
+editor. Please refer to [Apple's documentation][CFBundleURLTypes] for details.

 **Note:** In a Windows Store environment (when packaged as an `appx`) this API
 will return `true` for all calls but the registry key it sets won't be accessible
 by other applications.  In order to register your Windows Store application
 as a default protocol handler you must [declare the protocol in your manifest](https://docs.microsoft.com/en-us/uwp/schemas/appxpackage/uapmanifestschema/element-uap-protocol).

-The API uses the Windows Registry and LSSetDefaultHandlerForURLScheme internally.
+The API uses the Windows Registry and `LSSetDefaultHandlerForURLScheme` internally.

 ### `app.removeAsDefaultProtocolClient(protocol[, path, args])` _macOS_ _Windows_

@@ -757,10 +780,8 @@ protocol (aka URI scheme). If so, it will remove the app as the default handler.
 * `path` String (optional) _Windows_ - Defaults to `process.execPath`
 * `args` String[] (optional) _Windows_ - Defaults to an empty array

-Returns `Boolean`
-
-This method checks if the current executable is the default handler for a protocol
-(aka URI scheme). If so, it will return true. Otherwise, it will return false.
+Returns `Boolean` - Whether the current executable is the default handler for a
+protocol (aka URI scheme).

 **Note:** On macOS, you can use this method to check if the app has been
 registered as the default protocol handler for a protocol. You can also verify
@@ -768,7 +789,22 @@ this by checking `~/Library/Preferences/com.apple.LaunchServices.plist` on the
 macOS machine. Please refer to
 [Apple's documentation][LSCopyDefaultHandlerForURLScheme] for details.

-The API uses the Windows Registry and LSCopyDefaultHandlerForURLScheme internally.
+The API uses the Windows Registry and `LSCopyDefaultHandlerForURLScheme` internally.
+
+### `app.getApplicationNameForProtocol(url)`
+
+* `url` String - a URL with the protocol name to check. Unlike the other
+  methods in this family, this accepts an entire URL, including `://` at a
+  minimum (e.g. `https://`).
+
+Returns `String` - Name of the application handling the protocol, or an empty
+  string if there is no handler. For instance, if Electron is the default
+  handler of the URL, this could be `Electron` on Windows and Mac. However,
+  don't rely on the precise format which is not guaranteed to remain unchanged.
+  Expect a different format on Linux, possibly with a `.desktop` suffix.
+
+This method returns the application name of the default handler for the protocol
+(aka URI scheme) of a URL.

 ### `app.setUserTasks(tasks)` _Windows_

@@ -930,7 +966,7 @@ if (!gotTheLock) {
  })

  // Create myWindow, load the rest of the app, etc...
-  app.on('ready', () => {
+  app.whenReady().then(() => {
  })
 }
 ```
@@ -987,6 +1023,17 @@ Updates the current activity if its type matches `type`, merging the entries fro

 Changes the [Application User Model ID][app-user-model-id] to `id`.

+### `app.setActivationPolicy(policy)` _macOS_
+
+* `policy` String - Can be 'regular', 'accessory', or 'prohibited'.
+
+Sets the activation policy for a given app.
+
+Activation policy types:
+* 'regular' - The application is an ordinary app that appears in the Dock and may have a user interface.
+* 'accessory' - The application doesn’t appear in the Dock and doesn’t have a menu bar, but it may be activated programmatically or by clicking on one of its windows.
+* 'prohibited' - The application doesn’t appear in the Dock and may not create windows or be activated.
+
 ### `app.importCertificate(options, callback)` _Linux_

 * `options` Object
@@ -1009,7 +1056,7 @@ This method can only be called before app is ready.

 By default, Chromium disables 3D APIs (e.g. WebGL) until restart on a per
 domain basis if the GPU processes crashes too frequently. This function
-disables that behaviour.
+disables that behavior.

 This method can only be called before app is ready.

@@ -1073,14 +1120,10 @@ On macOS, it shows on the dock icon. On Linux, it only works for Unity launcher.
 **Note:** Unity launcher requires the existence of a `.desktop` file to work,
 for more information please read [Desktop Environment Integration][unity-requirement].

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.getBadgeCount()` _Linux_ _macOS_

 Returns `Integer` - The current value displayed in the counter badge.

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.isUnityRunning()` _Linux_

 Returns `Boolean` - Whether the current desktop environment is Unity launcher.
@@ -1155,8 +1198,6 @@ technologies, such as screen readers, has been detected. See
 https://www.chromium.org/developers/design-documents/accessibility for more
 details.

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.setAccessibilitySupportEnabled(enabled)` _macOS_ _Windows_

 * `enabled` Boolean - Enable or disable [accessibility tree](https://developers.google.com/web/fundamentals/accessibility/semantics-builtin/the-accessibility-tree) rendering
@@ -1168,8 +1209,6 @@ This API must be called after the `ready` event is emitted.

 **Note:** Rendering accessibility tree can significantly affect the performance of your app. It should not be enabled by default.

-**[Deprecated](modernization/property-updates.md)**
-
 ### `app.showAboutPanel()`

 Show the app's about panel options. These options can be overridden with `app.setAboutPanelOptions(options)`.
@@ -1186,8 +1225,9 @@ Show the app's about panel options. These options can be overridden with `app.se
  * `website` String (optional) _Linux_ - The app's website.
  * `iconPath` String (optional) _Linux_ _Windows_ - Path to the app's icon. On Linux, will be shown as 64x64 pixels while retaining aspect ratio.

-Set the about panel options. This will override the values defined in the app's
-`.plist` file on MacOS. See the [Apple docs][about-panel-options] for more details. On Linux, values must be set in order to be shown; there are no defaults.
+Set the about panel options. This will override the values defined in the app's `.plist` file on macOS. See the [Apple docs][about-panel-options] for more details. On Linux, values must be set in order to be shown; there are no defaults.
+
+If you do not set `credits` but still wish to surface them in your app, AppKit will look for a file named "Credits.html", "Credits.rtf", and "Credits.rtfd", in that order, in the bundle returned by the NSBundle class method main. The first file found is used, and if none is found, the info area is left blank. See Apple [documentation](https://developer.apple.com/documentation/appkit/nsaboutpaneloptioncredits?language=objc) for more information.

 ### `app.isEmojiPanelSupported()`

@@ -1214,9 +1254,9 @@ stopAccessingSecurityScopedResource()

 Start accessing a security scoped resource. With this method Electron applications that are packaged for the Mac App Store may reach outside their sandbox to access files chosen by the user. See [Apple's documentation](https://developer.apple.com/library/content/documentation/Security/Conceptual/AppSandboxDesignGuide/AppSandboxInDepth/AppSandboxInDepth.html#//apple_ref/doc/uid/TP40011183-CH3-SW16) for a description of how this system works.

-### `app.enableSandbox()` _Experimental_
+### `app.enableSandbox()`

-Enables full sandbox mode on the app.
+Enables full sandbox mode on the app. This means that all renderers will be launched sandboxed, regardless of the value of the `sandbox` flag in WebPreferences.

 This method can only be called before app is ready.

@@ -1228,7 +1268,7 @@ systems Application folder. Use in combination with `app.moveToApplicationsFolde
 ### `app.moveToApplicationsFolder([options])` _macOS_

 * `options` Object (optional)
-  * `conflictHandler` Function<Boolean> (optional) - A handler for potential conflict in move failure.
+  * `conflictHandler` Function\<Boolean> (optional) - A handler for potential conflict in move failure.
    * `conflictType` String - The type of move conflict encountered by the handler; can be `exists` or `existsAndRunning`, where `exists` means that an app of the same name is present in the Applications directory and `existsAndRunning` means both that it exists and that it's presently running.

 Returns `Boolean` - Whether the move was successful. Please note that if
@@ -1265,6 +1305,25 @@ app.moveToApplicationsFolder({

 Would mean that if an app already exists in the user directory, if the user chooses to 'Continue Move' then the function would continue with its default behavior and the existing app will be trashed and the active app moved into its place.

+### `app.isSecureKeyboardEntryEnabled()` _macOS_
+
+Returns `Boolean` - whether `Secure Keyboard Entry` is enabled.
+
+By default this API will return `false`.
+
+### `app.setSecureKeyboardEntryEnabled(enabled)` _macOS_
+
+* `enabled` Boolean - Enable or disable `Secure Keyboard Entry`
+
+Set the `Secure Keyboard Entry` is enabled in your application.
+
+By using this API, important information such as password and other sensitive information can be prevented from being intercepted by other processes.
+
+See [Apple's documentation](https://developer.apple.com/library/archive/technotes/tn2150/_index.html) for more
+details.
+
+**Note:** Enable `Secure Keyboard Entry` only when it is needed and disable it when it is no longer needed.
+
 ## Properties

 ### `app.accessibilitySupportEnabled` _macOS_ _Windows_
@@ -1291,6 +1350,9 @@ On macOS, setting this with any nonzero integer shows on the dock icon. On Linux
 **Note:** Unity launcher requires the existence of a `.desktop` file to work,
 for more information please read [Desktop Environment Integration][unity-requirement].

+**Note:** On macOS, you need to ensure that your application has the permission
+to display notifications for this property to take effect.
+
 ### `app.commandLine` _Readonly_

 A [`CommandLine`](./command-line.md) object that allows you to read and manipulate the
@@ -1298,7 +1360,7 @@ command line arguments that Chromium uses.

 ### `app.dock` _macOS_ _Readonly_

-A [`Dock`](./dock.md) object that allows you to perform actions on your app icon in the user's
+A [`Dock`](./dock.md) `| undefined` object that allows you to perform actions on your app icon in the user's
 dock on macOS.

 ### `app.isPackaged` _Readonly_
@@ -1308,6 +1370,8 @@ A `Boolean` property that returns  `true` if the app is packaged, `false` otherw
 [dock-menu]:https://developer.apple.com/macos/human-interface-guidelines/menus/dock-menus/
 [tasks]:https://msdn.microsoft.com/en-us/library/windows/desktop/dd378460(v=vs.85).aspx#tasks
 [app-user-model-id]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd378459(v=vs.85).aspx
+[electron-forge]: https://www.electronforge.io/
+[electron-packager]: https://github.com/electron/electron-packager
 [CFBundleURLTypes]: https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html#//apple_ref/doc/uid/TP40009249-102207-TPXREF115
 [LSCopyDefaultHandlerForURLScheme]: https://developer.apple.com/library/mac/documentation/Carbon/Reference/LaunchServicesReference/#//apple_ref/c/func/LSCopyDefaultHandlerForURLScheme
 [handoff]: https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/Handoff/HandoffFundamentals/HandoffFundamentals.html
@@ -1340,7 +1404,7 @@ in your app's initialization to ensure that your overridden value is used.

 A `Boolean` which when `true` disables the overrides that Electron has in place
 to ensure renderer processes are restarted on every navigation.  The current
-default value for this property is `false`.
+default value for this property is `true`.

 The intention is for these overrides to become disabled by default and then at
 some point in the future this property will be removed.  This property impacts
--- a/docs/api/breaking-changes-ns.md
+++ b/docs/api/breaking-changes-ns.md
@@ -1,61 +0,0 @@
-# Breaking changes (NetworkService) (Draft)
-
-This document describes changes to Electron APIs after migrating network code
-to NetworkService API.
-
-We don't currently have an estimate of when we will enable `NetworkService` by
-default in Electron, but as Chromium is already removing non-`NetworkService`
-code, we might switch before Electron 10.
-
-The content of this document should be moved to `breaking-changes.md` once we have
-determined when to enable `NetworkService` in Electron.
-
-## Planned Breaking API Changes
-
-### `protocol.unregisterProtocol`
-### `protocol.uninterceptProtocol`
-
-The APIs are now synchronous and the optional callback is no longer needed.
-
-```javascript
-// Deprecated
-protocol.unregisterProtocol(scheme, () => { /* ... */ })
-// Replace with
-protocol.unregisterProtocol(scheme)
-```
-
-### `protocol.registerFileProtocol`
-### `protocol.registerBufferProtocol`
-### `protocol.registerStringProtocol`
-### `protocol.registerHttpProtocol`
-### `protocol.registerStreamProtocol`
-### `protocol.interceptFileProtocol`
-### `protocol.interceptStringProtocol`
-### `protocol.interceptBufferProtocol`
-### `protocol.interceptHttpProtocol`
-### `protocol.interceptStreamProtocol`
-
-The APIs are now synchronous and the optional callback is no longer needed.
-
-```javascript
-// Deprecated
-protocol.registerFileProtocol(scheme, handler, () => { /* ... */ })
-// Replace with
-protocol.registerFileProtocol(scheme, handler)
-```
-
-The registered or intercepted protocol does not have effect on current page
-until navigation happens.
-
-### `protocol.isProtocolHandled`
-
-This API is deprecated and users should use `protocol.isProtocolRegistered`
-and `protocol.isProtocolIntercepted` instead.
-
-```javascript
-// Deprecated
-protocol.isProtocolHandled(scheme).then(() => { /* ... */ })
-// Replace with
-const isRegistered = protocol.isProtocolRegistered(scheme)
-const isIntercepted = protocol.isProtocolIntercepted(scheme)
-```
--- a/docs/api/breaking-changes.md
+++ b/docs/api/breaking-changes.md
@@ -1,601 +0,0 @@
-# Breaking Changes
-
-Breaking changes will be documented here, and deprecation warnings added to JS code where possible, at least [one major version](../tutorial/electron-versioning.md#semver) before the change is made.
-
-## `FIXME` comments
-
-The `FIXME` string is used in code comments to denote things that should be fixed for future releases. See https://github.com/electron/electron/search?q=fixme
-
-## Planned Breaking API Changes (8.0)
-
-### Values sent over IPC are now serialized with Structured Clone Algorithm
-
-The algorithm used to serialize objects sent over IPC (through
-`ipcRenderer.send`, `ipcRenderer.sendSync`, `WebContents.send` and related
-methods) has been switched from a custom algorithm to V8's built-in [Structured
-Clone Algorithm][SCA], the same algorithm used to serialize messages for
-`postMessage`. This brings about a 2x performance improvement for large
-messages, but also brings some breaking changes in behavior.
-
- Sending Functions, Promises, WeakMaps, WeakSets, or objects containing any
-  such values, over IPC will now throw an exception, instead of silently
-  converting the functions to `undefined`.
-```js
-// Previously:
-ipcRenderer.send('channel', { value: 3, someFunction: () => {} })
-// => results in { value: 3 } arriving in the main process
-
-// From Electron 8:
-ipcRenderer.send('channel', { value: 3, someFunction: () => {} })
-// => throws Error("() => {} could not be cloned.")
-```
- `NaN`, `Infinity` and `-Infinity` will now be correctly serialized, instead
-  of being converted to `null`.
- Objects containing cyclic references will now be correctly serialized,
-  instead of being converted to `null`.
- `Set`, `Map`, `Error` and `RegExp` values will be correctly serialized,
-  instead of being converted to `{}`.
- `BigInt` values will be correctly serialized, instead of being converted to
-  `null`.
- Sparse arrays will be serialized as such, instead of being converted to dense
-  arrays with `null`s.
- `Date` objects will be transferred as `Date` objects, instead of being
-  converted to their ISO string representation.
- Typed Arrays (such as `Uint8Array`, `Uint16Array`, `Uint32Array` and so on)
-  will be transferred as such, instead of being converted to Node.js `Buffer`.
- Node.js `Buffer` objects will be transferred as `Uint8Array`s. You can
-  convert a `Uint8Array` back to a Node.js `Buffer` by wrapping the underlying
-  `ArrayBuffer`:
-```js
-Buffer.from(value.buffer, value.byteOffset, value.byteLength)
-```
-
-Sending any objects that aren't native JS types, such as DOM objects (e.g.
-`Element`, `Location`, `DOMMatrix`), Node.js objects (e.g. `process.env`,
-`Stream`), or Electron objects (e.g. `WebContents`, `BrowserWindow`,
-`WebFrame`) is deprecated. In Electron 8, these objects will be serialized as
-before with a DeprecationWarning message, but starting in Electron 9, sending
-these kinds of objects will throw a 'could not be cloned' error.
-
-[SCA]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
-
-## Planned Breaking API Changes (7.0)
-
-### Node Headers URL
-
-This is the URL specified as `disturl` in a `.npmrc` file or as the `--dist-url`
-command line flag when building native Node modules.  Both will be supported for
-the foreseeable future but it is recommended that you switch.
-
-Deprecated: https://atom.io/download/electron
-
-Replace with: https://electronjs.org/headers
-
-### `session.clearAuthCache(options)`
-
-The `session.clearAuthCache` API no longer accepts options for what to clear, and instead unconditionally clears the whole cache.
-
-```js
-// Deprecated
-session.clearAuthCache({ type: 'password' })
-// Replace with
-session.clearAuthCache()
-```
-
-### `powerMonitor.querySystemIdleState`
-
-```js
-// Removed in Electron 7.0
-powerMonitor.querySystemIdleState(threshold, callback)
-// Replace with synchronous API
-const idleState = getSystemIdleState(threshold)
-```
-
-### `powerMonitor.querySystemIdleTime`
-
-```js
-// Removed in Electron 7.0
-powerMonitor.querySystemIdleTime(callback)
-// Replace with synchronous API
-const idleTime = getSystemIdleTime()
-```
-
-### webFrame Isolated World APIs
-
-```js
-// Removed in Elecron 7.0
-webFrame.setIsolatedWorldContentSecurityPolicy(worldId, csp)
-webFrame.setIsolatedWorldHumanReadableName(worldId, name)
-webFrame.setIsolatedWorldSecurityOrigin(worldId, securityOrigin)
-// Replace with
-webFrame.setIsolatedWorldInfo(
-  worldId,
-  {
-    securityOrigin: 'some_origin',
-    name: 'human_readable_name',
-    csp: 'content_security_policy'
-  })
-```
-
-### Removal of deprecated `marked` property on getBlinkMemoryInfo
-
-This property was removed in Chromium 77, and as such is no longer available.
-
-## Planned Breaking API Changes (6.0)
-
-### `win.setMenu(null)`
-
-```js
-// Deprecated
-win.setMenu(null)
-// Replace with
-win.removeMenu()
-```
-
-### `contentTracing.getTraceBufferUsage()`
-
-```js
-// Deprecated
-contentTracing.getTraceBufferUsage((percentage, value) => {
-  // do something
-})
-// Replace with
-contentTracing.getTraceBufferUsage().then(infoObject => {
-  // infoObject has percentage and value fields
-})
-```
-
-### `electron.screen` in renderer process
-
-```js
-// Deprecated
-require('electron').screen
-// Replace with
-require('electron').remote.screen
-```
-
-### `require` in sandboxed renderers
-
-```js
-// Deprecated
-require('child_process')
-// Replace with
-require('electron').remote.require('child_process')
-
-// Deprecated
-require('fs')
-// Replace with
-require('electron').remote.require('fs')
-
-// Deprecated
-require('os')
-// Replace with
-require('electron').remote.require('os')
-
-// Deprecated
-require('path')
-// Replace with
-require('electron').remote.require('path')
-```
-
-### `powerMonitor.querySystemIdleState`
-
-```js
-// Deprecated
-powerMonitor.querySystemIdleState(threshold, callback)
-// Replace with synchronous API
-const idleState = getSystemIdleState(threshold)
-```
-
-### `powerMonitor.querySystemIdleTime`
-
-```js
-// Deprecated
-powerMonitor.querySystemIdleTime(callback)
-// Replace with synchronous API
-const idleTime = getSystemIdleTime()
-```
-
-### `app.enableMixedSandbox`
-
-```js
-// Deprecated
-app.enableMixedSandbox()
-```
-
-Mixed-sandbox mode is now enabled by default.
-
-### `Tray`
-
-Under macOS Catalina our former Tray implementation breaks.
-Apple's native substitute doesn't support changing the highlighting behavior.
-
-```js
-// Deprecated
-tray.setHighlightMode(mode)
-// API will be removed in v7.0 without replacement.
-```
-
-## Planned Breaking API Changes (5.0)
-
-### `new BrowserWindow({ webPreferences })`
-
-The following `webPreferences` option default values are deprecated in favor of the new defaults listed below.
-
-| Property | Deprecated Default | New Default |
-|----------|--------------------|-------------|
-| `contextIsolation` | `false` | `true` |
-| `nodeIntegration` | `true` | `false` |
-| `webviewTag` | `nodeIntegration` if set else `true` | `false` |
-
-E.g. Re-enabling the webviewTag
-
-```js
-const w = new BrowserWindow({
-  webPreferences: {
-    webviewTag: true
-  }
-})
-```
-
-### `nativeWindowOpen`
-
-Child windows opened with the `nativeWindowOpen` option will always have Node.js integration disabled, unless `nodeIntegrationInSubFrames` is `true.
-
-### Privileged Schemes Registration
-
-Renderer process APIs `webFrame.setRegisterURLSchemeAsPrivileged` and `webFrame.registerURLSchemeAsBypassingCSP` as well as browser process API `protocol.registerStandardSchemes` have been removed.
-A new API, `protocol.registerSchemesAsPrivileged` has been added and should be used for registering custom schemes with the required privileges. Custom schemes are required to be registered before app ready.
-
-### webFrame Isolated World APIs
-
-```js
-// Deprecated
-webFrame.setIsolatedWorldContentSecurityPolicy(worldId, csp)
-webFrame.setIsolatedWorldHumanReadableName(worldId, name)
-webFrame.setIsolatedWorldSecurityOrigin(worldId, securityOrigin)
-// Replace with
-webFrame.setIsolatedWorldInfo(
-  worldId,
-  {
-    securityOrigin: 'some_origin',
-    name: 'human_readable_name',
-    csp: 'content_security_policy'
-  })
-```
-
-## `webFrame.setSpellCheckProvider`
-The `spellCheck` callback is now asynchronous, and `autoCorrectWord` parameter has been removed.
-```js
-// Deprecated
-webFrame.setSpellCheckProvider('en-US', true, {
-  spellCheck: (text) => {
-    return !spellchecker.isMisspelled(text)
-  }
-})
-// Replace with
-webFrame.setSpellCheckProvider('en-US', {
-  spellCheck: (words, callback) => {
-    callback(words.filter(text => spellchecker.isMisspelled(text)))
-  }
-})
-```
-
-## Planned Breaking API Changes (4.0)
-
-The following list includes the breaking API changes made in Electron 4.0.
-
-### `app.makeSingleInstance`
-
-```js
-// Deprecated
-app.makeSingleInstance((argv, cwd) => {
-  /* ... */
-})
-// Replace with
-app.requestSingleInstanceLock()
-app.on('second-instance', (event, argv, cwd) => {
-  /* ... */
-})
-```
-
-### `app.releaseSingleInstance`
-
-```js
-// Deprecated
-app.releaseSingleInstance()
-// Replace with
-app.releaseSingleInstanceLock()
-```
-
-### `app.getGPUInfo`
-
-```js
-app.getGPUInfo('complete')
-// Now behaves the same with `basic` on macOS
-app.getGPUInfo('basic')
-```
-
-### `win_delay_load_hook`
-
-When building native modules for windows, the `win_delay_load_hook` variable in
-the module's `binding.gyp` must be true (which is the default). If this hook is
-not present, then the native module will fail to load on Windows, with an error
-message like `Cannot find module`. See the [native module
-guide](/docs/tutorial/using-native-node-modules.md) for more.
-
-## Breaking API Changes (3.0)
-
-The following list includes the breaking API changes in Electron 3.0.
-
-### `app`
-
-```js
-// Deprecated
-app.getAppMemoryInfo()
-// Replace with
-app.getAppMetrics()
-
-// Deprecated
-const metrics = app.getAppMetrics()
-const { memory } = metrics[0] // Deprecated property
-```
-
-### `BrowserWindow`
-
-```js
-// Deprecated
-let optionsA = { webPreferences: { blinkFeatures: '' } }
-let windowA = new BrowserWindow(optionsA)
-// Replace with
-let optionsB = { webPreferences: { enableBlinkFeatures: '' } }
-let windowB = new BrowserWindow(optionsB)
-
-// Deprecated
-window.on('app-command', (e, cmd) => {
-  if (cmd === 'media-play_pause') {
-    // do something
-  }
-})
-// Replace with
-window.on('app-command', (e, cmd) => {
-  if (cmd === 'media-play-pause') {
-    // do something
-  }
-})
-```
-
-### `clipboard`
-
-```js
-// Deprecated
-clipboard.readRtf()
-// Replace with
-clipboard.readRTF()
-
-// Deprecated
-clipboard.writeRtf()
-// Replace with
-clipboard.writeRTF()
-
-// Deprecated
-clipboard.readHtml()
-// Replace with
-clipboard.readHTML()
-
-// Deprecated
-clipboard.writeHtml()
-// Replace with
-clipboard.writeHTML()
-```
-
-### `crashReporter`
-
-```js
-// Deprecated
-crashReporter.start({
-  companyName: 'Crashly',
-  submitURL: 'https://crash.server.com',
-  autoSubmit: true
-})
-// Replace with
-crashReporter.start({
-  companyName: 'Crashly',
-  submitURL: 'https://crash.server.com',
-  uploadToServer: true
-})
-```
-
-### `nativeImage`
-
-```js
-// Deprecated
-nativeImage.createFromBuffer(buffer, 1.0)
-// Replace with
-nativeImage.createFromBuffer(buffer, {
-  scaleFactor: 1.0
-})
-```
-
-### `process`
-
-```js
-// Deprecated
-const info = process.getProcessMemoryInfo()
-```
-
-### `screen`
-
-```js
-// Deprecated
-screen.getMenuBarHeight()
-// Replace with
-screen.getPrimaryDisplay().workArea
-```
-
-### `session`
-
-```js
-// Deprecated
-ses.setCertificateVerifyProc((hostname, certificate, callback) => {
-  callback(true)
-})
-// Replace with
-ses.setCertificateVerifyProc((request, callback) => {
-  callback(0)
-})
-```
-
-### `Tray`
-
-```js
-// Deprecated
-tray.setHighlightMode(true)
-// Replace with
-tray.setHighlightMode('on')
-
-// Deprecated
-tray.setHighlightMode(false)
-// Replace with
-tray.setHighlightMode('off')
-```
-
-### `webContents`
-
-```js
-// Deprecated
-webContents.openDevTools({ detach: true })
-// Replace with
-webContents.openDevTools({ mode: 'detach' })
-
-// Removed
-webContents.setSize(options)
-// There is no replacement for this API
-```
-
-### `webFrame`
-
-```js
-// Deprecated
-webFrame.registerURLSchemeAsSecure('app')
-// Replace with
-protocol.registerStandardSchemes(['app'], { secure: true })
-
-// Deprecated
-webFrame.registerURLSchemeAsPrivileged('app', { secure: true })
-// Replace with
-protocol.registerStandardSchemes(['app'], { secure: true })
-```
-
-### `<webview>`
-
-```js
-// Removed
-webview.setAttribute('disableguestresize', '')
-// There is no replacement for this API
-
-// Removed
-webview.setAttribute('guestinstance', instanceId)
-// There is no replacement for this API
-
-// Keyboard listeners no longer work on webview tag
-webview.onkeydown = () => { /* handler */ }
-webview.onkeyup = () => { /* handler */ }
-```
-
-### Node Headers URL
-
-This is the URL specified as `disturl` in a `.npmrc` file or as the `--dist-url`
-command line flag when building native Node modules.
-
-Deprecated: https://atom.io/download/atom-shell
-
-Replace with: https://atom.io/download/electron
-
-## Breaking API Changes (2.0)
-
-The following list includes the breaking API changes made in Electron 2.0.
-
-### `BrowserWindow`
-
-```js
-// Deprecated
-let optionsA = { titleBarStyle: 'hidden-inset' }
-let windowA = new BrowserWindow(optionsA)
-// Replace with
-let optionsB = { titleBarStyle: 'hiddenInset' }
-let windowB = new BrowserWindow(optionsB)
-```
-
-### `menu`
-
-```js
-// Removed
-menu.popup(browserWindow, 100, 200, 2)
-// Replaced with
-menu.popup(browserWindow, { x: 100, y: 200, positioningItem: 2 })
-```
-
-### `nativeImage`
-
-```js
-// Removed
-nativeImage.toPng()
-// Replaced with
-nativeImage.toPNG()
-
-// Removed
-nativeImage.toJpeg()
-// Replaced with
-nativeImage.toJPEG()
-```
-
-### `process`
-
-* `process.versions.electron` and `process.version.chrome` will be made
-  read-only properties for consistency with the other `process.versions`
-  properties set by Node.
-
-### `webContents`
-
-```js
-// Removed
-webContents.setZoomLevelLimits(1, 2)
-// Replaced with
-webContents.setVisualZoomLevelLimits(1, 2)
-```
-
-### `webFrame`
-
-```js
-// Removed
-webFrame.setZoomLevelLimits(1, 2)
-// Replaced with
-webFrame.setVisualZoomLevelLimits(1, 2)
-```
-
-### `<webview>`
-
-```js
-// Removed
-webview.setZoomLevelLimits(1, 2)
-// Replaced with
-webview.setVisualZoomLevelLimits(1, 2)
-```
-
-### Duplicate ARM Assets
-
-Each Electron release includes two identical ARM builds with slightly different
-filenames, like `electron-v1.7.3-linux-arm.zip` and
-`electron-v1.7.3-linux-armv7l.zip`. The asset with the `v7l` prefix was added
-to clarify to users which ARM version it supports, and to disambiguate it from
-future armv6l and arm64 assets that may be produced.
-
-The file _without the prefix_ is still being published to avoid breaking any
-setups that may be consuming it. Starting at 2.0, the unprefixed file will
-no longer be published.
-
-For details, see
-[6986](https://github.com/electron/electron/pull/6986)
-and
-[7189](https://github.com/electron/electron/pull/7189).
--- a/docs/api/browser-view.md
+++ b/docs/api/browser-view.md
@@ -15,12 +15,9 @@ relative to its owning window. It is meant to be an alternative to the
 // In the main process.
 const { BrowserView, BrowserWindow } = require('electron')

-let win = new BrowserWindow({ width: 800, height: 600 })
-win.on('closed', () => {
-  win = null
-})
+const win = new BrowserWindow({ width: 800, height: 600 })

-let view = new BrowserView()
+const view = new BrowserView()
 win.setBrowserView(view)
 view.setBounds({ x: 0, y: 0, width: 300, height: 300 })
 view.webContents.loadURL('https://electronjs.org')
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -11,10 +11,7 @@ const { BrowserWindow } = require('electron')
 // Or use `remote` from the renderer process.
 // const { BrowserWindow } = require('electron').remote

-let win = new BrowserWindow({ width: 800, height: 600 })
-win.on('closed', () => {
-  win = null
-})
+const win = new BrowserWindow({ width: 800, height: 600 })

 // Load a remote URL
 win.loadURL('https://github.com')
@@ -180,7 +177,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
  * `simpleFullscreen` Boolean (optional) - Use pre-Lion fullscreen on macOS. Default is `false`.
  * `skipTaskbar` Boolean (optional) - Whether to show the window in taskbar. Default is
    `false`.
-  * `kiosk` Boolean (optional) - The kiosk mode. Default is `false`.
+  * `kiosk` Boolean (optional) - Whether the window is in kiosk mode. Default is `false`.
  * `title` String (optional) - Default window title. Default is `"Electron"`. If the HTML tag `<title>` is defined in the HTML file loaded by `loadURL()`, this property will be ignored.
  * `icon` ([NativeImage](native-image.md) | String) (optional) - The window icon. On Windows it is
    recommended to use `ICO` icons to get best visual effects, you can also
@@ -215,6 +212,10 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
    Default is `false`. On Windows, does not work unless the window is frameless.
  * `type` String (optional) - The type of window, default is normal window. See more about
    this below.
+  * `visualEffectState` String (optional) - Specify how the material appearance should reflect window activity state on macOS. Must be used with the `vibrancy` property. Possible values are:
+    * `followWindow` - The backdrop should automatically appear active when the window is active, and inactive when it is not. This is the default.
+    * `active` - The backdrop should always appear active.
+    * `inactive` - The backdrop should always appear inactive.
  * `titleBarStyle` String (optional) - The style of window title bar.
    Default is `default`. Possible values are:
    * `default` - Results in the standard gray opaque Mac title
@@ -229,6 +230,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      unless hovered over in the top left of the window. These custom buttons prevent
      issues with mouse events that occur with the standard window toolbar buttons.
      **Note:** This option is currently experimental.
+  * `trafficLightPosition` [Point](structures/point.md) (optional) - Set a custom position for the traffic light buttons. Can only be used with `titleBarStyle` set to `hidden`
  * `fullscreenWindowTitle` Boolean (optional) - Shows the title in the
    title bar in full screen mode on macOS for all `titleBarStyle` options.
    Default is `false`.
@@ -272,10 +274,8 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      OS-level sandbox and disabling the Node.js engine. This is not the same as
      the `nodeIntegration` option and the APIs available to the preload script
      are more limited. Read more about the option [here](sandbox-option.md).
-      **Note:** This option is currently experimental and may change or be
-      removed in future Electron releases.
    * `enableRemoteModule` Boolean (optional) - Whether to enable the [`remote`](remote.md) module.
-      Default is `true`.
+      Default is `false`.
    * `session` [Session](session.md#class-session) (optional) - Sets the session used by the
      page. Instead of passing the Session object directly, you can also choose to
      use the `partition` option instead, which accepts a partition string. When
@@ -293,7 +293,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      between the web pages even when you specified different values for them,
      including but not limited to `preload`, `sandbox` and `nodeIntegration`.
      So it is suggested to use exact same `webPreferences` for web pages with
-      the same `affinity`. _This property is experimental_
+      the same `affinity`. _Deprecated_
    * `zoomFactor` Number (optional) - The default zoom factor of the page, `3.0` represents
      `300%`. Default is `1.0`.
    * `javascript` Boolean (optional) - Enables JavaScript support. Default is `true`.
@@ -352,6 +352,9 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      You can access this context in the dev tools by selecting the
      'Electron Isolated Context' entry in the combo box at the top of the
      Console tab.
+    * `worldSafeExecuteJavaScript` Boolean (optional) - If true, values returned from `webFrame.executeJavaScript` will be sanitized to ensure JS values
+      can't unsafely cross between worlds when using `contextIsolation`.  The default
+      is `false`. In Electron 12, the default will be changed to `true`. _Deprecated_
    * `nativeWindowOpen` Boolean (optional) - Whether to use native
      `window.open()`. Defaults to `false`. Child windows will always have node
      integration disabled unless `nodeIntegrationInSubFrames` is true. **Note:** This option is currently
@@ -373,6 +376,8 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      consecutive dialog protection is triggered. If not defined the default
      message would be used, note that currently the default message is in
      English and not localized.
+    * `disableDialogs` Boolean (optional) - Whether to disable dialogs
+      completely. Overrides `safeDialogs`. Default is `false`.
    * `navigateOnDragDrop` Boolean (optional) - Whether dragging and dropping a
      file or link onto the page causes a navigation. Default is `false`.
    * `autoplayPolicy` String (optional) - Autoplay policy to apply to
@@ -385,6 +390,17 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
    * `accessibleTitle` String (optional) - An alternative title string provided only
      to accessibility tools such as screen readers. This string is not directly
      visible to users.
+    * `spellcheck` Boolean (optional) - Whether to enable the builtin spellchecker.
+      Default is `true`.
+    * `enableWebSQL` Boolean (optional) - Whether to enable the [WebSQL api](https://www.w3.org/TR/webdatabase/).
+      Default is `true`.
+    * `v8CacheOptions` String (optional) - Enforces the v8 code caching policy
+      used by blink. Accepted values are
+      * `none` - Disables code caching
+      * `code` - Heuristic based code caching
+      * `bypassHeatCheck` - Bypass code caching heuristics but with lazy compilation
+      * `bypassHeatCheckAndEagerCompile` - Same as above except compilation is eager.
+      Default policy is `code`.

 When setting minimum or maximum window size with `minWidth`/`maxWidth`/
 `minHeight`/`maxHeight`, it only constrains the users. It won't prevent you from
@@ -515,7 +531,7 @@ Emitted when the window is restored from a minimized state.
 Returns:

 * `event` Event
-* `newBounds` [`Rectangle`](structures/rectangle.md) - Size the window is being resized to.
+* `newBounds` [Rectangle](structures/rectangle.md) - Size the window is being resized to.

 Emitted before the window is resized. Calling `event.preventDefault()` will prevent the window from being resized.

@@ -530,7 +546,7 @@ Emitted after the window has been resized.
 Returns:

 * `event` Event
-* `newBounds` [`Rectangle`](structures/rectangle.md) - Location the window is being moved to.
+* `newBounds` [Rectangle](structures/rectangle.md) - Location the window is being moved to.

 Emitted before the window is moved. On Windows, calling `event.preventDefault()` will prevent the window from being moved.

@@ -623,6 +639,12 @@ Returns:

 Emitted on 3-finger swipe. Possible directions are `up`, `right`, `down`, `left`.

+The method underlying this event is built to handle older macOS-style trackpad swiping,
+where the content on the screen doesn't move with the swipe. Most macOS trackpads are not
+configured to allow this kind of swiping anymore, so in order for it to emit properly the
+'Swipe between pages' preference in `System Preferences > Trackpad > More Gestures` must be
+set to 'Swipe with two or three fingers'.
+
 #### Event: 'rotate-gesture' _macOS_

 Returns:
@@ -679,7 +701,7 @@ Returns `BrowserWindow | null` - The window that owns the given `browserView`. I

 Returns `BrowserWindow` - The window with the given `id`.

-#### `BrowserWindow.addExtension(path)`
+#### `BrowserWindow.addExtension(path)` _Deprecated_

 * `path` String

@@ -690,7 +712,10 @@ The method will also not return if the extension's manifest is missing or incomp
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

-#### `BrowserWindow.removeExtension(name)`
+**Note:** This method is deprecated. Instead, use
+[`ses.loadExtension(path)`](session.md#sesloadextensionpath).
+
+#### `BrowserWindow.removeExtension(name)` _Deprecated_

 * `name` String

@@ -699,7 +724,10 @@ Remove a Chrome extension by name.
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

-#### `BrowserWindow.getExtensions()`
+**Note:** This method is deprecated. Instead, use
+[`ses.removeExtension(extension_id)`](session.md#sesremoveextensionextensionid).
+
+#### `BrowserWindow.getExtensions()` _Deprecated_

 Returns `Record<String, ExtensionInfo>` - The keys are the extension names and each value is
 an Object containing `name` and `version` properties.
@@ -707,7 +735,10 @@ an Object containing `name` and `version` properties.
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

-#### `BrowserWindow.addDevToolsExtension(path)`
+**Note:** This method is deprecated. Instead, use
+[`ses.getAllExtensions()`](session.md#sesgetallextensions).
+
+#### `BrowserWindow.addDevToolsExtension(path)` _Deprecated_

 * `path` String

@@ -723,7 +754,10 @@ The method will also not return if the extension's manifest is missing or incomp
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

-#### `BrowserWindow.removeDevToolsExtension(name)`
+**Note:** This method is deprecated. Instead, use
+[`ses.loadExtension(path)`](session.md#sesloadextensionpath).
+
+#### `BrowserWindow.removeDevToolsExtension(name)` _Deprecated_

 * `name` String

@@ -732,7 +766,10 @@ Remove a DevTools extension by name.
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

-#### `BrowserWindow.getDevToolsExtensions()`
+**Note:** This method is deprecated. Instead, use
+[`ses.removeExtension(extension_id)`](session.md#sesremoveextensionextensionid).
+
+#### `BrowserWindow.getDevToolsExtensions()` _Deprecated_

 Returns `Record<string, ExtensionInfo>` - The keys are the extension names and each value is
 an Object containing `name` and `version` properties.
@@ -749,6 +786,9 @@ console.log(installed)
 **Note:** This API cannot be called before the `ready` event of the `app` module
 is emitted.

+**Note:** This method is deprecated. Instead, use
+[`ses.getAllExtensions()`](session.md#sesgetallextensions).
+
 ### Instance Properties

 Objects created with `new BrowserWindow` have the following properties:
@@ -770,7 +810,7 @@ events.

 #### `win.id` _Readonly_

-A `Integer` property representing the unique ID of the window.
+A `Integer` property representing the unique ID of the window. Each ID is unique among all `BrowserWindow` instances of the entire Electron application.

 #### `win.autoHideMenuBar`

@@ -779,6 +819,51 @@ A `Boolean` property that determines whether the window menu bar should hide its
 If the menu bar is already visible, setting this property to `true` won't
 hide it immediately.

+#### `win.simpleFullScreen`
+
+A `Boolean` property that determines whether the window is in simple (pre-Lion) fullscreen mode.
+
+#### `win.fullScreen`
+
+A `Boolean` property that determines whether the window is in fullscreen mode.
+
+#### `win.visibleOnAllWorkspaces`
+
+A `Boolean` property that determines whether the window is visible on all workspaces.
+
+**Note:** Always returns false on Windows.
+
+#### `win.shadow`
+
+A `Boolean` property that determines whether the window has a shadow.
+
+#### `win.menuBarVisible` _Windows_ _Linux_
+
+A `Boolean` property that determines whether the menu bar should be visible.
+
+**Note:** If the menu bar is auto-hide, users can still bring up the menu bar by pressing the single `Alt` key.
+
+####  `win.kiosk`
+
+A `Boolean` property that determines whether the window is in kiosk mode.
+
+#### `win.documentEdited` _macOS_
+
+A `Boolean` property that specifies whether the window’s document has been edited.
+
+The icon in title bar will become gray when set to `true`.
+
+#### `win.representedFilename` _macOS_
+
+A `String` property that determines the pathname of the file the window represents,
+and the icon of the file will show in window's title bar.
+
+#### `win.title`
+
+A `String` property that determines the title of the native window.
+
+**Note:** The title of the web page can be different from the title of the native window.
+
 #### `win.minimizable`

 A `Boolean` property that determines whether the window can be manually minimized by user.
@@ -934,7 +1019,7 @@ Returns `Boolean` - Whether the window is in fullscreen mode.

 Enters or leaves simple fullscreen mode.

-Simple fullscreen mode emulates the native fullscreen behavior found in versions of Mac OS X prior to Lion (10.7).
+Simple fullscreen mode emulates the native fullscreen behavior found in versions of macOS prior to Lion (10.7).

 #### `win.isSimpleFullScreen()` _macOS_

@@ -944,11 +1029,11 @@ Returns `Boolean` - Whether the window is in simple (pre-Lion) fullscreen mode.

 Returns `Boolean` - Whether the window is in normal state (not maximized, not minimized, not in fullscreen mode).

-#### `win.setAspectRatio(aspectRatio[, extraSize])` _macOS_
+#### `win.setAspectRatio(aspectRatio[, extraSize])` _macOS_ _Linux_

 * `aspectRatio` Float - The aspect ratio to maintain for some portion of the
 content view.
-* `extraSize` [Size](structures/size.md) (optional) - The extra size not to be included while
+ * `extraSize` [Size](structures/size.md) (optional) _macOS_ - The extra size not to be included while
 maintaining the aspect ratio.

 This will make a window maintain an aspect ratio. The extra size allows a
@@ -961,13 +1046,10 @@ Perhaps there are 15 pixels of controls on the left edge, 25 pixels of controls
 on the right edge and 50 pixels of controls below the player. In order to
 maintain a 16:9 aspect ratio (standard aspect ratio for HD @1920x1080) within
 the player itself we would call this function with arguments of 16/9 and
-[ 40, 50 ]. The second argument doesn't care where the extra width and height
+{ width: 40, height: 50 }. The second argument doesn't care where the extra width and height
 are within the content view--only that they exist. Sum any extra width and
 height areas you have within the overall content view.

-Calling this function with a value of `0` will remove any previously set aspect
-ratios.
-
 #### `win.setBackgroundColor(backgroundColor)`

 * `backgroundColor` String - Window's background color as a hexadecimal value,
@@ -1017,6 +1099,11 @@ console.log(win.getBounds())

 Returns [`Rectangle`](structures/rectangle.md) - The `bounds` of the window as `Object`.

+#### `win.getBackgroundColor()`
+
+Returns `String` - Gets the background color of the window. See [Setting
+`backgroundColor`](#setting-backgroundcolor).
+
 #### `win.setContentBounds(bounds[, animate])`

 * `bounds` [Rectangle](structures/rectangle.md)
@@ -1043,7 +1130,7 @@ Disable or enable the window.

 #### `win.isEnabled()`

-Returns Boolean - whether the window is enabled.
+Returns `Boolean` - whether the window is enabled.

 #### `win.setSize(width, height[, animate])`

@@ -1095,15 +1182,11 @@ Returns `Integer[]` - Contains the window's maximum width and height.

 * `resizable` Boolean

-Sets whether the window can be manually resized by user.
-
-**[Deprecated](modernization/property-updates.md)**
+Sets whether the window can be manually resized by the user.

 #### `win.isResizable()`

-Returns `Boolean` - Whether the window can be manually resized by user.
-
-**[Deprecated](modernization/property-updates.md)**
+Returns `Boolean` - Whether the window can be manually resized by the user.

 #### `win.setMovable(movable)` _macOS_ _Windows_

@@ -1111,41 +1194,29 @@ Returns `Boolean` - Whether the window can be manually resized by user.

 Sets whether the window can be moved by user. On Linux does nothing.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.isMovable()` _macOS_ _Windows_

 Returns `Boolean` - Whether the window can be moved by user.

 On Linux always returns `true`.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.setMinimizable(minimizable)` _macOS_ _Windows_

 * `minimizable` Boolean

-Sets whether the window can be manually minimized by user. On Linux does
-nothing.
-
-**[Deprecated](modernization/property-updates.md)**
+Sets whether the window can be manually minimized by user. On Linux does nothing.

 #### `win.isMinimizable()` _macOS_ _Windows_

-Returns `Boolean` - Whether the window can be manually minimized by user
+Returns `Boolean` - Whether the window can be manually minimized by the user.

 On Linux always returns `true`.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.setMaximizable(maximizable)` _macOS_ _Windows_

 * `maximizable` Boolean

-Sets whether the window can be manually maximized by user. On Linux does
-nothing.
-
-**[Deprecated](modernization/property-updates.md)**
+Sets whether the window can be manually maximized by user. On Linux does nothing.

 #### `win.isMaximizable()` _macOS_ _Windows_

@@ -1153,23 +1224,15 @@ Returns `Boolean` - Whether the window can be manually maximized by user.

 On Linux always returns `true`.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.setFullScreenable(fullscreenable)`

 * `fullscreenable` Boolean

-Sets whether the maximize/zoom window button toggles fullscreen mode or
-maximizes the window.
-
-**[Deprecated](modernization/property-updates.md)**
+Sets whether the maximize/zoom window button toggles fullscreen mode or maximizes the window.

 #### `win.isFullScreenable()`

-Returns `Boolean` - Whether the maximize/zoom window button toggles fullscreen mode or
-maximizes the window.
-
-**[Deprecated](modernization/property-updates.md)**
+Returns `Boolean` - Whether the maximize/zoom window button toggles fullscreen mode or maximizes the window.

 #### `win.setClosable(closable)` _macOS_ _Windows_

@@ -1177,16 +1240,12 @@ maximizes the window.

 Sets whether the window can be manually closed by user. On Linux does nothing.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.isClosable()` _macOS_ _Windows_

 Returns `Boolean` - Whether the window can be manually closed by user.

 On Linux always returns `true`.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.setAlwaysOnTop(flag[, level][, relativeLevel])`

 * `flag` Boolean
@@ -1284,7 +1343,7 @@ Makes the window not show in the taskbar.

 * `flag` Boolean

-Enters or leaves the kiosk mode.
+Enters or leaves kiosk mode.

 #### `win.isKiosk()`

@@ -1579,7 +1638,7 @@ Same as `webContents.showDefinitionForSelection()`.

 #### `win.setIcon(icon)` _Windows_ _Linux_

-* `icon` [NativeImage](native-image.md)
+* `icon` [NativeImage](native-image.md) | String

 Changes window icon.

@@ -1598,23 +1657,17 @@ This cannot be called when `titleBarStyle` is set to `customButtonsOnHover`.
 Sets whether the window menu bar should hide itself automatically. Once set the
 menu bar will only show when users press the single `Alt` key.

-If the menu bar is already visible, calling `setAutoHideMenuBar(true)` won't
-hide it immediately.
-
-**[Deprecated](modernization/property-updates.md)**
+If the menu bar is already visible, calling `setAutoHideMenuBar(true)` won't hide it immediately.

 #### `win.isMenuBarAutoHide()`

 Returns `Boolean` - Whether menu bar automatically hides itself.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `win.setMenuBarVisibility(visible)` _Windows_ _Linux_

 * `visible` Boolean

-Sets whether the menu bar should be visible. If the menu bar is auto-hide, users
-can still bring up the menu bar by pressing the single `Alt` key.
+Sets whether the menu bar should be visible. If the menu bar is auto-hide, users can still bring up the menu bar by pressing the single `Alt` key.

 #### `win.isMenuBarVisible()`

@@ -1733,7 +1786,18 @@ will remove the vibrancy effect on the window.
 Note that `appearance-based`, `light`, `dark`, `medium-light`, and `ultra-dark` have been
 deprecated and will be removed in an upcoming version of macOS.

-#### `win.setTouchBar(touchBar)` _macOS_ _Experimental_
+#### `win.setTrafficLightPosition(position)` _macOS_
+
+* `position` [Point](structures/point.md)
+
+Set a custom position for the traffic light buttons. Can only be used with `titleBarStyle` set to `hidden`.
+
+#### `win.getTrafficLightPosition()` _macOS_
+
+Returns `Point` - The current position for the traffic light buttons. Can only be used with `titleBarStyle`
+set to `hidden`.
+
+#### `win.setTouchBar(touchBar)` _macOS_

 * `touchBar` TouchBar | null

--- a/docs/api/client-request.md
+++ b/docs/api/client-request.md
@@ -22,6 +22,9 @@ which the request is associated.
  with which the request is associated. Defaults to the empty string. The
 `session` option prevails on `partition`. Thus if a `session` is explicitly
 specified, `partition` is ignored.
+  * `useSessionCookies` Boolean (optional) - Whether to send cookies with this
+    request from the provided session.  This will make the `net` request's
+    cookie behavior match a `fetch` request. Default is `false`.
  * `protocol` String (optional) - The protocol scheme in the form 'scheme:'.
 Currently supported values are 'http:' or 'https:'. Defaults to 'http:'.
  * `host` String (optional) - The server host provided as a concatenation of
@@ -32,8 +35,8 @@ the hostname and the port number 'hostname:port'.
  * `redirect` String (optional) - The redirect mode for this request. Should be
 one of `follow`, `error` or `manual`. Defaults to `follow`. When mode is `error`,
 any redirection will be aborted. When mode is `manual` the redirection will be
-deferred until [`request.followRedirect`](#requestfollowredirect) is invoked. Listen for the [`redirect`](#event-redirect) event in
-this mode to get more details about the redirect request.
+cancelled unless [`request.followRedirect`](#requestfollowredirect) is invoked
+synchronously during the [`redirect`](#event-redirect) event.

 `options` properties such as `protocol`, `host`, `hostname`, `port` and `path`
 strictly follow the Node.js model as described in the
@@ -70,8 +73,8 @@ Returns:
  * `port` Integer
  * `realm` String
 * `callback` Function
-  * `username` String
-  * `password` String
+  * `username` String (optional)
+  * `password` String (optional)

 Emitted when an authenticating proxy is asking for user credentials.

@@ -136,8 +139,11 @@ Returns:
 * `redirectUrl` String
 * `responseHeaders` Record<String, String[]>

-Emitted when there is redirection and the mode is `manual`. Calling
-[`request.followRedirect`](#requestfollowredirect) will continue with the redirection.
+Emitted when the server returns a redirect response (e.g. 301 Moved
+Permanently). Calling [`request.followRedirect`](#requestfollowredirect) will
+continue with the redirection.  If this event is handled,
+[`request.followRedirect`](#requestfollowredirect) must be called
+**synchronously**, otherwise the request will be cancelled.

 ### Instance Properties

@@ -214,7 +220,8 @@ response object,it will emit the `aborted` event.

 #### `request.followRedirect()`

-Continues any deferred redirection request when the redirection mode is `manual`.
+Continues any pending redirection. Can only be called during a `'redirect'`
+event.

 #### `request.getUploadProgress()`

--- a/docs/api/command-line-switches.md
+++ b/docs/api/command-line-switches.md
@@ -11,85 +11,75 @@ const { app } = require('electron')
 app.commandLine.appendSwitch('remote-debugging-port', '8315')
 app.commandLine.appendSwitch('host-rules', 'MAP * 127.0.0.1')

-app.on('ready', () => {
+app.whenReady().then(() => {
  // Your code here
 })
 ```

-## --ignore-connections-limit=`domains`
+## Electron CLI Flags

-Ignore the connections limit for `domains` list separated by `,`.
+### --auth-server-whitelist=`url`

-## --disable-http-cache
-
-Disables the disk cache for HTTP requests.
-
-## --disable-http2
-
-Disable HTTP/2 and SPDY/3.1 protocols.
-
-## --lang
-
-Set a custom locale.
-
-## --inspect=`port` and --inspect-brk=`port`
-
-Debug-related flags, see the [Debugging the Main Process][debugging-main-process] guide for details.
-
-## --remote-debugging-port=`port`
-
-Enables remote debugging over HTTP on the specified `port`.
-
-## --disk-cache-size=`size`
-
-Forces the maximum disk space to be used by the disk cache, in bytes.
-
-## --js-flags=`flags`
-
-Specifies the flags passed to the Node.js engine. It has to be passed when starting
-Electron if you want to enable the `flags` in the main process.
-
-```sh
-$ electron --js-flags="--harmony_proxies --harmony_collections" your-app
-```
-
-See the [Node.js documentation][node-cli] or run `node --help` in your terminal for a list of available flags. Additionally, run `node --v8-options` to see a list of flags that specifically refer to Node.js's V8 JavaScript engine.
-
-## --proxy-server=`address:port`
-
-Use a specified proxy server, which overrides the system setting. This switch
-only affects requests with HTTP protocol, including HTTPS and WebSocket
-requests. It is also noteworthy that not all proxy servers support HTTPS and
-WebSocket requests. The proxy URL does not support username and password
-authentication [per Chromium issue](https://bugs.chromium.org/p/chromium/issues/detail?id=615947).
-
-## --proxy-bypass-list=`hosts`
-
-Instructs Electron to bypass the proxy server for the given semi-colon-separated
-list of hosts. This flag has an effect only if used in tandem with
-`--proxy-server`.
+A comma-separated list of servers for which integrated authentication is enabled.

 For example:

-```javascript
-const { app } = require('electron')
-app.commandLine.appendSwitch('proxy-bypass-list', '<local>;*.google.com;*foo.com;1.2.3.4:5678')
+```sh
+--auth-server-whitelist='*example.com, *foobar.com, *baz'
 ```

-Will use the proxy server for all hosts except for local addresses (`localhost`,
-`127.0.0.1` etc.), `google.com` subdomains, hosts that contain the suffix
-`foo.com` and anything at `1.2.3.4:5678`.
+then any `url` ending with `example.com`, `foobar.com`, `baz` will be considered
+for integrated authentication. Without `*` prefix the URL has to match exactly.

-## --proxy-pac-url=`url`
+### --auth-negotiate-delegate-whitelist=`url`

-Uses the PAC script at the specified `url`.
+A comma-separated list of servers for which delegation of user credentials is required.
+Without `*` prefix the URL has to match exactly.

-## --no-proxy-server
+### --disable-ntlm-v2

-Don't use a proxy server and always make direct connections. Overrides any other
-proxy server flags that are passed.
+Disables NTLM v2 for posix platforms, no effect elsewhere.

-## --host-rules=`rules`
+### --disable-http-cache
+
+Disables the disk cache for HTTP requests.
+
+### --disable-http2
+
+Disable HTTP/2 and SPDY/3.1 protocols.
+
+### --disable-renderer-backgrounding
+
+Prevents Chromium from lowering the priority of invisible pages' renderer
+processes.
+
+This flag is global to all renderer processes, if you only want to disable
+throttling in one window, you can take the hack of
+[playing silent audio][play-silent-audio].
+
+### --disk-cache-size=`size`
+
+Forces the maximum disk space to be used by the disk cache, in bytes.
+
+### --enable-api-filtering-logging
+
+Enables caller stack logging for the following APIs (filtering events):
+- `desktopCapturer.getSources()` / `desktop-capturer-get-sources`
+- `remote.require()` / `remote-require`
+- `remote.getGlobal()` / `remote-get-builtin`
+- `remote.getBuiltin()` / `remote-get-global`
+- `remote.getCurrentWindow()` / `remote-get-current-window`
+- `remote.getCurrentWebContents()` / `remote-get-current-web-contents`
+
+### --enable-logging
+
+Prints Chromium's logging into console.
+
+This switch can not be used in `app.commandLine.appendSwitch` since it is parsed
+earlier than user's app is loaded, but you can set the `ELECTRON_ENABLE_LOGGING`
+environment variable to achieve the same effect.
+
+### --host-rules=`rules`

 A comma-separated list of `rules` that control how hostnames are mapped.

@@ -107,69 +97,96 @@ These mappings apply to the endpoint host in a net request (the TCP connect
 and host resolver in a direct connection, and the `CONNECT` in an HTTP proxy
 connection, and the endpoint host in a `SOCKS` proxy connection).

-## --host-resolver-rules=`rules`
+### --host-resolver-rules=`rules`

 Like `--host-rules` but these `rules` only apply to the host resolver.

-## --auth-server-whitelist=`url`
-
-A comma-separated list of servers for which integrated authentication is enabled.
-
-For example:
-
-```sh
--auth-server-whitelist='*example.com, *foobar.com, *baz'
-```
-
-then any `url` ending with `example.com`, `foobar.com`, `baz` will be considered
-for integrated authentication. Without `*` prefix the URL has to match exactly.
-
-## --auth-negotiate-delegate-whitelist=`url`
-
-A comma-separated list of servers for which delegation of user credentials is required.
-Without `*` prefix the URL has to match exactly.
-
-## --ignore-certificate-errors
+### --ignore-certificate-errors

 Ignores certificate related errors.

-## --ppapi-flash-path=`path`
+### --ignore-connections-limit=`domains`

-Sets the `path` of the pepper flash plugin.
+Ignore the connections limit for `domains` list separated by `,`.

-## --ppapi-flash-version=`version`
+### --js-flags=`flags`

-Sets the `version` of the pepper flash plugin.
+Specifies the flags passed to the Node.js engine. It has to be passed when starting
+Electron if you want to enable the `flags` in the main process.

-## --log-net-log=`path`
+```sh
+$ electron --js-flags="--harmony_proxies --harmony_collections" your-app
+```
+
+See the [Node.js documentation][node-cli] or run `node --help` in your terminal for a list of available flags. Additionally, run `node --v8-options` to see a list of flags that specifically refer to Node.js's V8 JavaScript engine.
+
+### --lang
+
+Set a custom locale.
+
+### --log-net-log=`path`

 Enables net log events to be saved and writes them to `path`.

-## --disable-renderer-backgrounding
+### --no-proxy-server

-Prevents Chromium from lowering the priority of invisible pages' renderer
-processes.
+Don't use a proxy server and always make direct connections. Overrides any other
+proxy server flags that are passed.

-This flag is global to all renderer processes, if you only want to disable
-throttling in one window, you can take the hack of
-[playing silent audio][play-silent-audio].
+### --no-sandbox

-## --enable-logging
+Disables Chromium sandbox, which is now enabled by default.
+Should only be used for testing.

-Prints Chromium's logging into console.
+### --proxy-bypass-list=`hosts`

-This switch can not be used in `app.commandLine.appendSwitch` since it is parsed
-earlier than user's app is loaded, but you can set the `ELECTRON_ENABLE_LOGGING`
-environment variable to achieve the same effect.
+Instructs Electron to bypass the proxy server for the given semi-colon-separated
+list of hosts. This flag has an effect only if used in tandem with
+`--proxy-server`.

-## --v=`log_level`
+For example:
+
+```javascript
+const { app } = require('electron')
+app.commandLine.appendSwitch('proxy-bypass-list', '<local>;*.google.com;*foo.com;1.2.3.4:5678')
+```
+
+Will use the proxy server for all hosts except for local addresses (`localhost`,
+`127.0.0.1` etc.), `google.com` subdomains, hosts that contain the suffix
+`foo.com` and anything at `1.2.3.4:5678`.
+
+### --proxy-pac-url=`url`
+
+Uses the PAC script at the specified `url`.
+
+### --proxy-server=`address:port`
+
+Use a specified proxy server, which overrides the system setting. This switch
+only affects requests with HTTP protocol, including HTTPS and WebSocket
+requests. It is also noteworthy that not all proxy servers support HTTPS and
+WebSocket requests. The proxy URL does not support username and password
+authentication [per Chromium issue](https://bugs.chromium.org/p/chromium/issues/detail?id=615947).
+
+### --remote-debugging-port=`port`
+
+Enables remote debugging over HTTP on the specified `port`.
+
+### --ppapi-flash-path=`path`
+
+Sets the `path` of the pepper flash plugin.
+
+### --ppapi-flash-version=`version`
+
+Sets the `version` of the pepper flash plugin.
+
+### --v=`log_level`

 Gives the default maximal active V-logging level; 0 is the default. Normally
 positive values are used for V-logging levels.

 This switch only works when `--enable-logging` is also passed.

-## --vmodule=`pattern`
+### --vmodule=`pattern`

 Gives the per-module maximal V-logging levels to override the value given by
 `--v`. E.g. `my_module=2,foo*=3` would change the logging level for all code in
@@ -181,21 +198,46 @@ logging level for all code in the source files under a `foo/bar` directory.

 This switch only works when `--enable-logging` is also passed.

-## --enable-api-filtering-logging
+### --force_high_performance_gpu

-Enables caller stack logging for the following APIs (filtering events):
- `desktopCapturer.getSources()` / `desktop-capturer-get-sources`
- `remote.require()` / `remote-require`
- `remote.getGlobal()` / `remote-get-builtin`
- `remote.getBuiltin()` / `remote-get-global`
- `remote.getCurrentWindow()` / `remote-get-current-window`
- `remote.getCurrentWebContents()` / `remote-get-current-web-contents`
- `remote.getGuestWebContents()` / `remote-get-guest-web-contents`
+Force using discrete GPU when there are multiple GPUs available.

-## --no-sandbox
+### --force_low_power_gpu

-Disables Chromium sandbox, which is now enabled by default.
-Should only be used for testing.
+Force using integrated GPU when there are multiple GPUs available.
+
+## Node.js Flags
+
+Electron supports some of the [CLI flags][node-cli] supported by Node.js.
+
+**Note:** Passing unsupported command line switches to Electron when it is not running in `ELECTRON_RUN_AS_NODE` will have no effect.
+
+### --inspect-brk[=[host:]port]
+
+Activate inspector on host:port and break at start of user script. Default host:port is 127.0.0.1:9229.
+
+Aliased to `--debug-brk=[host:]port`.
+
+### --inspect-port=[host:]port
+
+Set the `host:port` to be used when the inspector is activated. Useful when activating the inspector by sending the SIGUSR1 signal. Default host is `127.0.0.1`.
+
+Aliased to `--debug-port=[host:]port`.
+
+### --inspect[=[host:]port]
+
+Activate inspector on `host:port`. Default is `127.0.0.1:9229`.
+
+V8 inspector integration allows tools such as Chrome DevTools and IDEs to debug and profile Electron instances. The tools attach to Electron instances via a TCP port and communicate using the [Chrome DevTools Protocol](https://chromedevtools.github.io/devtools-protocol/).
+
+See the [Debugging the Main Process][debugging-main-process] guide for more details.
+
+Aliased to `--debug[=[host:]port`.
+
+### --inspect-publish-uid=stderr,http
+Specify ways of the inspector web socket url exposure.
+
+By default inspector websocket url is available in stderr and under /json/list endpoint on http://host:port/json/list.

 [app]: app.md
 [append-switch]: app.md#appcommandlineappendswitchswitch-value
--- a/docs/api/content-tracing.md
+++ b/docs/api/content-tracing.md
@@ -13,7 +13,7 @@ module is emitted.
 ```javascript
 const { app, contentTracing } = require('electron')

-app.on('ready', () => {
+app.whenReady().then(() => {
  (async () => {
    await contentTracing.startRecording({
      include_categories: ['*']
@@ -38,6 +38,9 @@ Get a set of category groups. The category groups can change as new code paths
 are reached. See also the [list of built-in tracing
 categories](https://chromium.googlesource.com/chromium/src/+/master/base/trace_event/builtin_categories.h).

+> **NOTE:** Electron adds a non-default tracing category called `"electron"`.
+> This category can be used to capture Electron-specific tracing events.
+
 ### `contentTracing.startRecording(options)`

 * `options` ([TraceConfig](structures/trace-config.md) | [TraceCategoriesAndOptions](structures/trace-categories-and-options.md))
--- a/docs/api/context-bridge.md
+++ b/docs/api/context-bridge.md
@@ -28,13 +28,14 @@ window.electron.doThing()

 ### Main World

-The "Main World" is the javascript context that your main renderer code runs in.  By default the page you load in your renderer
-executes code in this world.
+The "Main World" is the JavaScript context that your main renderer code runs in. By default, the
+page you load in your renderer executes code in this world.

 ### Isolated World

-When `contextIsolation` is enabled in your `webPreferences` your `preload` scripts run in an "Isolated World".  You can read more about
-context isolation and what it affects in the [BrowserWindow](browser-window.md) docs.
+When `contextIsolation` is enabled in your `webPreferences`, your `preload` scripts run in an
+"Isolated World".  You can read more about context isolation and what it affects in the
+[security](../tutorial/security.md#3-enable-context-isolation-for-remote-content) docs.

 ## Methods

@@ -50,12 +51,12 @@ The `contextBridge` module has the following methods:
 ### API Objects

 The `api` object provided to [`exposeInMainWorld`](#contextbridgeexposeinmainworldapikey-api-experimental) must be an object
-whose keys are strings and values are a `Function`, `String`, `Number`, `Array`, `Boolean` or another nested object that meets the same conditions.
+whose keys are strings and values are a `Function`, `String`, `Number`, `Array`, `Boolean`, or another nested object that meets the same conditions.

-`Function` values are proxied to the other context and all other values are **copied** and **frozen**.  I.e. Any data / primitives sent in
+`Function` values are proxied to the other context and all other values are **copied** and **frozen**. Any data / primitives sent in
 the API object become immutable and updates on either side of the bridge do not result in an update on the other side.

-An example of a complex API object is shown below.
+An example of a complex API object is shown below:

 ```javascript
 const { contextBridge } = require('electron')
@@ -90,22 +91,22 @@ results in some key limitations that we've outlined below.

 #### Parameter / Error / Return Type support

-Because parameters, errors and return values are **copied** when they are sent over the bridge there are only certain types that can be used.
-At a high level if the type you want to use can be serialized and un-serialized into the same object it will work.  A table of type support
-has been included below for completeness.
+Because parameters, errors and return values are **copied** when they are sent over the bridge, there are only certain types that can be used.
+At a high level, if the type you want to use can be serialized and deserialized into the same object it will work.  A table of type support
+has been included below for completeness:

 | Type | Complexity | Parameter Support | Return Value Support | Limitations |
 | ---- | ---------- | ----------------- | -------------------- | ----------- |
 | `String` | Simple | ✅ | ✅ | N/A |
 | `Number` | Simple | ✅ | ✅ | N/A |
 | `Boolean` | Simple | ✅ | ✅ | N/A |
-| `Object` | Complex | ✅ | ✅ | Keys must be supported "Simple" types in this table.  Values must be supported in this table.  Prototype modifications are dropped.  Sending custom classes will copy values but not the prototype. |
+| `Object` | Complex | ✅ | ✅ | Keys must be supported using only "Simple" types in this table.  Values must be supported in this table.  Prototype modifications are dropped.  Sending custom classes will copy values but not the prototype. |
 | `Array` | Complex | ✅ | ✅ | Same limitations as the `Object` type |
 | `Error` | Complex | ✅ | ✅ | Errors that are thrown are also copied, this can result in the message and stack trace of the error changing slightly due to being thrown in a different context |
-| `Promise` | Complex | ✅ | ✅ | Promises are only proxied if they are a the return value or exact parameter.  Promises nested in arrays or obejcts will be dropped. |
+| `Promise` | Complex | ✅ | ✅ | Promises are only proxied if they are the return value or exact parameter.  Promises nested in arrays or objects will be dropped. |
 | `Function` | Complex | ✅ | ✅ | Prototype modifications are dropped.  Sending classes or constructors will not work. |
 | [Cloneable Types](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm) | Simple | ✅ | ✅ | See the linked document on cloneable types |
 | `Symbol` | N/A | ❌ | ❌ | Symbols cannot be copied across contexts so they are dropped |


-If the type you care about is not in the above table it is probably not supported.
+If the type you care about is not in the above table, it is probably not supported.
--- a/docs/api/cookies.md
+++ b/docs/api/cookies.md
@@ -96,6 +96,7 @@ the response.
  * `expirationDate` Double (optional) - The expiration date of the cookie as the number of
    seconds since the UNIX epoch. If omitted then the cookie becomes a session
    cookie and will not be retained between sessions.
+  * `sameSite` String (optional) - The [Same Site](https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies#SameSite_cookies) policy to apply to this cookie.  Can be `unspecified`, `no_restriction`, `lax` or `strict`.  Default is `no_restriction`.

 Returns `Promise<void>` - A promise which resolves when the cookie has been set

--- a/docs/api/crash-reporter.md
+++ b/docs/api/crash-reporter.md
@@ -4,18 +4,13 @@

 Process: [Main](../glossary.md#main-process), [Renderer](../glossary.md#renderer-process)

-The following is an example of automatically submitting a crash report to a
-remote server:
+The following is an example of setting up Electron to automatically submit
+crash reports to a remote server:

 ```javascript
 const { crashReporter } = require('electron')

-crashReporter.start({
-  productName: 'YourName',
-  companyName: 'YourCompany',
-  submitURL: 'https://your-domain.com/url-to-submit',
-  uploadToServer: true
-})
+crashReporter.start({ submitURL: 'https://your-domain.com/url-to-submit' })
 ```

 For setting up a server to accept and process crash reports, you can use
@@ -30,11 +25,19 @@ Or use a 3rd party hosted solution:
 * [Sentry](https://docs.sentry.io/clients/electron)
 * [BugSplat](https://www.bugsplat.com/docs/platforms/electron)

-Crash reports are saved locally in an application-specific temp directory folder.
-For a `productName` of `YourName`, crash reports will be stored in a folder
-named `YourName Crashes` inside the temp directory. You can customize this temp
-directory location for your app by calling the `app.setPath('temp', '/my/custom/temp')`
-API before starting the crash reporter.
+Crash reports are stored temporarily before being uploaded in a directory
+underneath the app's user data directory (called 'Crashpad' on Windows and Mac,
+or 'Crash Reports' on Linux). You can override this directory by calling
+`app.setPath('crashDumps', '/path/to/crashes')` before starting the crash
+reporter.
+
+On Windows and macOS, Electron uses
+[crashpad](https://chromium.googlesource.com/crashpad/crashpad/+/master/README.md)
+to monitor and report crashes. On Linux, Electron uses
+[breakpad](https://chromium.googlesource.com/breakpad/breakpad/+/master/). This
+is an implementation detail driven by Chromium, and it may change in future. In
+particular, crashpad is newer and will likely eventually replace breakpad on
+all platforms.

 ## Methods

@@ -43,40 +46,67 @@ The `crashReporter` module has the following methods:
 ### `crashReporter.start(options)`

 * `options` Object
-  * `companyName` String
  * `submitURL` String - URL that crash reports will be sent to as POST.
  * `productName` String (optional) - Defaults to `app.name`.
-  * `uploadToServer` Boolean (optional) - Whether crash reports should be sent to the server. Default is `true`.
-  * `ignoreSystemCrashHandler` Boolean (optional) - Default is `false`.
-  * `extra` Record<String, String> (optional) - An object you can define that will be sent along with the
-    report. Only string properties are sent correctly. Nested objects are not
-    supported. When using Windows, the property names and values must be fewer than 64 characters.
-  * `crashesDirectory` String (optional) - Directory to store the crash reports temporarily (only used when the crash reporter is started via `process.crashReporter.start`).
+  * `companyName` String (optional) _Deprecated_ - Deprecated alias for
+    `{ globalExtra: { _companyName: ... } }`.
+  * `uploadToServer` Boolean (optional) - Whether crash reports should be sent
+    to the server. If false, crash reports will be collected and stored in the
+    crashes directory, but not uploaded. Default is `true`.
+  * `ignoreSystemCrashHandler` Boolean (optional) - If true, crashes generated
+    in the main process will not be forwarded to the system crash handler.
+    Default is `false`.
+  * `rateLimit` Boolean (optional) _macOS_ _Windows_ - If true, limit the
+    number of crashes uploaded to 1/hour. Default is `false`.
+  * `compress` Boolean (optional) - If true, crash reports will be compressed
+    and uploaded with `Content-Encoding: gzip`. Default is `false`.
+  * `extra` Record<String, String> (optional) - Extra string key/value
+    annotations that will be sent along with crash reports that are generated
+    in the main process. Only string values are supported. Crashes generated in
+    child processes will not contain these extra
+    parameters to crash reports generated from child processes, call
+    [`addExtraParameter`](#crashreporteraddextraparameterkey-value) from the
+    child process.
+  * `globalExtra` Record<String, String> (optional) - Extra string key/value
+    annotations that will be sent along with any crash reports generated in any
+    process. These annotations cannot be changed once the crash reporter has
+    been started. If a key is present in both the global extra parameters and
+    the process-specific extra parameters, then the global one will take
+    precedence. By default, `productName` and the app version are included, as
+    well as the Electron version.

-You are required to call this method before using any other `crashReporter` APIs
-and in each process (main/renderer) from which you want to collect crash reports.
-You can pass different options to `crashReporter.start` when calling from different processes.
+This method must be called before using any other `crashReporter` APIs. Once
+initialized this way, the crashpad handler collects crashes from all
+subsequently created processes. The crash reporter cannot be disabled once
+started.

-**Note** Child processes created via the `child_process` module will not have access to the Electron modules.
-Therefore, to collect crash reports from them, use `process.crashReporter.start` instead. Pass the same options as above
-along with an additional one called `crashesDirectory` that should point to a directory to store the crash
-reports temporarily. You can test this out by calling `process.crash()` to crash the child process.
+This method should be called as early as possible in app startup, preferably
+before `app.on('ready')`. If the crash reporter is not initialized at the time
+a renderer process is created, then that renderer process will not be monitored
+by the crash reporter.

-**Note:** If you need send additional/updated `extra` parameters after your
-first call `start` you can call `addExtraParameter` on macOS or call `start`
-again with the new/updated `extra` parameters on Linux and Windows.
+**Note:** You can test out the crash reporter by generating a crash using
+`process.crash()`.

-**Note:** On macOS and windows, Electron uses a new `crashpad` client for crash collection and reporting.
-If you want to enable crash reporting, initializing `crashpad` from the main process using `crashReporter.start` is required
-regardless of which process you want to collect crashes from. Once initialized this way, the crashpad handler collects
-crashes from all processes. You still have to call `crashReporter.start` from the renderer or child process, otherwise crashes from
-them will get reported without `companyName`, `productName` or any of the `extra` information.
+**Note:** If you need to send additional/updated `extra` parameters after your
+first call `start` you can call `addExtraParameter`.
+
+**Note:** Parameters passed in `extra`, `globalExtra` or set with
+`addExtraParameter` have limits on the length of the keys and values. Key names
+must be at most 39 bytes long, and values must be no longer than 127 bytes.
+Keys with names longer than the maximum will be silently ignored. Key values
+longer than the maximum length will be truncated.
+
+**Note:** Calling this method from the renderer process is deprecated.

 ### `crashReporter.getLastCrashReport()`

-Returns [`CrashReport`](structures/crash-report.md):
+Returns [`CrashReport`](structures/crash-report.md) - The date and ID of the
+last crash report. Only crash reports that have been uploaded will be returned;
+even if a crash report is present on disk it will not be returned until it is
+uploaded. In the case that there are no uploaded reports, `null` is returned.

-Returns the date and ID of the last crash report. Only crash reports that have been uploaded will be returned; even if a crash report is present on disk it will not be returned until it is uploaded. In the case that there are no uploaded reports, `null` is returned.
+**Note:** Calling this method from the renderer process is deprecated.

 ### `crashReporter.getUploadedReports()`

@@ -85,43 +115,67 @@ Returns [`CrashReport[]`](structures/crash-report.md):
 Returns all uploaded crash reports. Each report contains the date and uploaded
 ID.

+**Note:** Calling this method from the renderer process is deprecated.
+
 ### `crashReporter.getUploadToServer()`

 Returns `Boolean` - Whether reports should be submitted to the server. Set through
 the `start` method or `setUploadToServer`.

-**Note:** This API can only be called from the main process.
+**Note:** Calling this method from the renderer process is deprecated.

 ### `crashReporter.setUploadToServer(uploadToServer)`

-* `uploadToServer` Boolean _macOS_ - Whether reports should be submitted to the server.
+* `uploadToServer` Boolean - Whether reports should be submitted to the server.

 This would normally be controlled by user preferences. This has no effect if
 called before `start` is called.

-**Note:** This API can only be called from the main process.
+**Note:** Calling this method from the renderer process is deprecated.

-### `crashReporter.addExtraParameter(key, value)` _macOS_ _Windows_
+### `crashReporter.getCrashesDirectory()` _Deprecated_

-* `key` String - Parameter key, must be less than 64 characters long.
-* `value` String - Parameter value, must be less than 64 characters long.
+Returns `String` - The directory where crashes are temporarily stored before being uploaded.

-Set an extra parameter to be sent with the crash report. The values
-specified here will be sent in addition to any values set via the `extra` option when `start` was called. This API is only available on macOS and windows, if you need to add/update extra parameters on Linux after your first call to `start` you can call `start` again with the updated `extra` options.
+**Note:** This method is deprecated, use `app.getPath('crashDumps')` instead.

-### `crashReporter.removeExtraParameter(key)` _macOS_ _Windows_
+### `crashReporter.addExtraParameter(key, value)`

-* `key` String - Parameter key, must be less than 64 characters long.
+* `key` String - Parameter key, must be no longer than 39 bytes.
+* `value` String - Parameter value, must be no longer than 127 bytes.

-Remove a extra parameter from the current set of parameters so that it will not be sent with the crash report.
+Set an extra parameter to be sent with the crash report. The values specified
+here will be sent in addition to any values set via the `extra` option when
+`start` was called.
+
+Parameters added in this fashion (or via the `extra` parameter to
+`crashReporter.start`) are specific to the calling process. Adding extra
+parameters in the main process will not cause those parameters to be sent along
+with crashes from renderer or other child processes. Similarly, adding extra
+parameters in a renderer process will not result in those parameters being sent
+with crashes that occur in other renderer processes or in the main process.
+
+**Note:** Parameters have limits on the length of the keys and values. Key
+names must be no longer than 39 bytes, and values must be no longer than 20320
+bytes. Keys with names longer than the maximum will be silently ignored. Key
+values longer than the maximum length will be truncated.
+
+**Note:** On linux values that are longer than 127 bytes will be chunked into
+multiple keys, each 127 bytes in length.  E.g. `addExtraParameter('foo', 'a'.repeat(130))`
+will result in two chunked keys `foo__1` and `foo__2`, the first will contain
+the first 127 bytes and the second will contain the remaining 3 bytes.  On
+your crash reporting backend you should stitch together keys in this format.
+
+### `crashReporter.removeExtraParameter(key)`
+
+* `key` String - Parameter key, must be no longer than 39 bytes.
+
+Remove a extra parameter from the current set of parameters. Future crashes
+will not include this parameter.

 ### `crashReporter.getParameters()`

-See all of the current parameters being passed to the crash reporter.
-
-### `crashReporter.getCrashesDirectory()`
-
-Returns `String` - The directory where crashes are temporarily stored before being uploaded.
+Returns `Record<String, String>` - The current 'extra' parameters of the crash reporter.

 ## Crash Report Payload

--- a/docs/api/debugger.md
+++ b/docs/api/debugger.md
@@ -52,6 +52,8 @@ Returns:
 * `method` String - Method name.
 * `params` any - Event parameters defined by the 'parameters'
   attribute in the remote debugging protocol.
+* `sessionId` String - Unique identifier of attached debugging session,
+   will match the value sent from `debugger.sendCommand`.

 Emitted whenever the debugging target issues an instrumentation event.

@@ -74,11 +76,16 @@ Returns `Boolean` - Whether a debugger is attached to the `webContents`.

 Detaches the debugger from the `webContents`.

-#### `debugger.sendCommand(method[, commandParams])`
+#### `debugger.sendCommand(method[, commandParams, sessionId])`

 * `method` String - Method name, should be one of the methods defined by the
   [remote debugging protocol][rdp].
 * `commandParams` any (optional) - JSON object with request parameters.
+* `sessionId` String (optional) - send command to the target with associated
+   debugging session id. The initial value can be obtained by sending
+   [Target.attachToTarget][attachToTarget] message.
+
+[attachToTarget]: https://chromedevtools.github.io/devtools-protocol/tot/Target/#method-attachToTarget

 Returns `Promise<any>` - A promise that resolves with the response defined by
 the 'returns' attribute of the command description in the remote debugging protocol
--- a/docs/api/desktop-capturer.md
+++ b/docs/api/desktop-capturer.md
@@ -3,7 +3,7 @@
 > Access information about media sources that can be used to capture audio and
 > video from the desktop using the [`navigator.mediaDevices.getUserMedia`] API.

-Process: [Renderer](../glossary.md#renderer-process)
+Process: [Main](../glossary.md#main-process), [Renderer](../glossary.md#renderer-process)

 The following example shows how to capture video from a desktop window whose
 title is `Electron`:
@@ -91,7 +91,11 @@ The `desktopCapturer` module has the following methods:

 Returns `Promise<DesktopCapturerSource[]>` - Resolves with an array of [`DesktopCapturerSource`](structures/desktop-capturer-source.md) objects, each `DesktopCapturerSource` represents a screen or an individual window that can be captured.

+**Note** Capturing the screen contents requires user consent on macOS 10.15 Catalina or higher,
+which can detected by [`systemPreferences.getMediaAccessStatus`].
+
 [`navigator.mediaDevices.getUserMedia`]: https://developer.mozilla.org/en/docs/Web/API/MediaDevices/getUserMedia
+[`systemPreferences.getMediaAccessStatus`]: system-preferences.md#systempreferencesgetmediaaccessstatusmediatype-macos

 ## Caveats

--- a/docs/api/dialog.md
+++ b/docs/api/dialog.md
@@ -120,7 +120,7 @@ Returns `Promise<Object>` - Resolve with an object containing the following:

 * `canceled` Boolean - whether or not the dialog was canceled.
 * `filePaths` String[] - An array of file paths chosen by the user. If the dialog is cancelled this will be an empty array.
-* `bookmarks` String[] (optional) _macOS_ _mas_ - An array matching the `filePaths` array of base64 encoded strings which contains security scoped bookmark data. `securityScopedBookmarks` must be enabled for this to be populated.
+* `bookmarks` String[] (optional) _macOS_ _mas_ - An array matching the `filePaths` array of base64 encoded strings which contains security scoped bookmark data. `securityScopedBookmarks` must be enabled for this to be populated. (For return values, see [table here](#bookmarks-array).)

 The `browserWindow` argument allows the dialog to attach itself to a parent window, making it modal.

@@ -215,7 +215,7 @@ The `filters` specifies an array of file types that can be displayed, see
 Returns `Promise<Object>` - Resolve with an object containing the following:
  * `canceled` Boolean - whether or not the dialog was canceled.
  * `filePath` String (optional) - If the dialog is canceled, this will be `undefined`.
-  * `bookmark` String (optional) _macOS_ _mas_ - Base64 encoded string which contains the security scoped bookmark data for the saved file. `securityScopedBookmarks` must be enabled for this to be present.
+  * `bookmark` String (optional) _macOS_ _mas_ - Base64 encoded string which contains the security scoped bookmark data for the saved file. `securityScopedBookmarks` must be enabled for this to be present. (For return values, see [table here](#bookmarks-array).)

 The `browserWindow` argument allows the dialog to attach itself to a parent window, making it modal.

@@ -269,6 +269,7 @@ Shows a message box, it will block the process until the message box is closed.
 It returns the index of the clicked button.

 The `browserWindow` argument allows the dialog to attach itself to a parent window, making it modal.
+If `browserWindow` is not shown dialog will not be attached to it. In such case It will be displayed as independed window.

 ### `dialog.showMessageBox([browserWindow, ]options)`

@@ -350,6 +351,17 @@ On Windows the options are more limited, due to the Win32 APIs used:
 * The `browserWindow` argument is ignored since it is not possible to make
   this confirmation dialog modal.

+## Bookmarks array
+
+`showOpenDialog`, `showOpenDialogSync`, `showSaveDialog`, and `showSaveDialogSync` will return a `bookmarks` array.
+
+| Build Type | securityScopedBookmarks boolean | Return Type | Return Value                   |
+|------------|---------------------------------|:-----------:|--------------------------------|
+| macOS mas  | True                            |   Success   | `['LONGBOOKMARKSTRING']`       |
+| macOS mas  | True                            |    Error    | `['']` (array of empty string) |
+| macOS mas  | False                           |      NA     | `[]` (empty array)             |
+| non mas    | any                             |      NA     | `[]` (empty array)             |
+
 ## Sheets

 On macOS, dialogs are presented as sheets attached to a window if you provide
--- a/docs/api/download-item.md
+++ b/docs/api/download-item.md
@@ -82,16 +82,12 @@ The API is only available in session's `will-download` callback function.
 If user doesn't set the save path via the API, Electron will use the original
 routine to determine the save path; this usually prompts a save dialog.

-**[Deprecated](modernization/property-updates.md): use the `savePath` property instead.**
-
 #### `downloadItem.getSavePath()`

 Returns `String` - The save path of the download item. This will be either the path
 set via `downloadItem.setSavePath(path)` or the path selected from the shown
 save dialog.

-**[Deprecated](modernization/property-updates.md): use the `savePath` property instead.**
-
 #### `downloadItem.setSaveDialogOptions(options)`

 * `options` SaveDialogOptions - Set the save file dialog options. This object has the same
--- a/docs/api/environment-variables.md
+++ b/docs/api/environment-variables.md
@@ -44,20 +44,32 @@ Unsupported options are:
 --use-openssl-ca
 ```

-`NODE_OPTIONS` are explicitly disallowed in packaged apps.
+`NODE_OPTIONS` are explicitly disallowed in packaged apps, except for the following:
+
+```sh
+--max-http-header-size
+--http-parser
+```

 ### `GOOGLE_API_KEY`

-You can provide an API key for making requests to Google's geocoding webservice. To do this, place the following code in your main process
-file, before opening any browser windows that will make geocoding requests:
+Geolocation support in Electron requires the use of Google Cloud Platform's
+geolocation webservice. To enable this feature, acquire a
+[Google API key](https://developers.google.com/maps/documentation/geolocation/get-api-key)
+and place the following code in your main process file, before opening any
+browser windows that will make geolocation requests:

 ```javascript
 process.env.GOOGLE_API_KEY = 'YOUR_KEY_HERE'
 ```

-For instructions on how to acquire a Google API key, visit [this page](https://developers.google.com/maps/documentation/javascript/get-api-key).
-By default, a newly generated Google API key may not be allowed to make
-geocoding requests. To enable geocoding requests, visit [this page](https://developers.google.com/maps/documentation/geocoding/get-api-key).
+By default, a newly generated Google API key may not be allowed to make geolocation requests.
+To enable the geolocation webservice for your project, enable it through the
+[API library](https://console.cloud.google.com/apis/library).
+
+N.B. You will need to add a
+[Billing Account](https://cloud.google.com/billing/docs/how-to/payment-methods#add_a_payment_method)
+to the project associated to the API key for the geolocation webservice to work.

 ### `ELECTRON_NO_ASAR`

@@ -68,6 +80,18 @@ and spawned child processes that set `ELECTRON_RUN_AS_NODE`.

 Starts the process as a normal Node.js process.

+In this mode, you will be able to pass [cli options](https://nodejs.org/api/cli.html) to Node.js as
+you would when running the normal Node.js executable, with the exception of the following flags:
+
+* "--openssl-config"
+* "--use-bundled-ca"
+* "--use-openssl-ca",
+* "--force-fips"
+* "--enable-fips"
+
+These flags are disabled owing to the fact that Electron uses BoringSSL instead of OpenSSL when building Node.js'
+`crypto` module, and so will not work as designed.
+
 ### `ELECTRON_NO_ATTACH_CONSOLE` _Windows_

 Don't attach to the current console session.
@@ -121,5 +145,16 @@ the `electron` command to use the specified build of Electron instead of
 the one downloaded by `npm install`. Usage:

 ```sh
-export ELECTRON_OVERRIDE_DIST_PATH=/Users/username/projects/electron/out/Debug
+export ELECTRON_OVERRIDE_DIST_PATH=/Users/username/projects/electron/out/Testing
 ```
+
+## Set By Electron
+
+Electron sets some variables in your environment at runtime.
+
+### `ORIGINAL_XDG_CURRENT_DESKTOP`
+
+This variable is set to the value of `XDG_CURRENT_DESKTOP` that your application
+originally launched with.  Electron sometimes modifies the value of `XDG_CURRENT_DESKTOP`
+to affect other logic within Chromium so if you want access to the _original_ value
+you should look up this environment variable instead.
--- a/docs/api/extensions.md
+++ b/docs/api/extensions.md
@@ -0,0 +1,122 @@
+# Chrome Extension Support
+
+Electron supports a subset of the [Chrome Extensions
+API][chrome-extensions-api-index], primarily to support DevTools extensions and
+Chromium-internal extensions, but it also happens to support some other
+extension capabilities.
+
+[chrome-extensions-api-index]: https://developer.chrome.com/extensions/api_index
+
+> **Note:** Electron does not support arbitrary Chrome extensions from the
+> store, and it is a **non-goal** of the Electron project to be perfectly
+> compatible with Chrome's implementation of Extensions.
+
+## Loading extensions
+
+Electron only supports loading unpacked extensions (i.e., `.crx` files do not
+work). Extensions are installed per-`session`. To load an extension, call
+[`ses.loadExtension`](session.md#sesloadextensionpath):
+
+```js
+const { session } = require('electron')
+
+session.loadExtension('path/to/unpacked/extension').then(({ id }) => {
+  // ...
+})
+```
+
+Loaded extensions will not be automatically remembered across exits; if you do
+not call `loadExtension` when the app runs, the extension will not be loaded.
+
+Note that loading extensions is only supported in persistent sessions.
+Attempting to load an extension into an in-memory session will throw an error.
+
+See the [`session`](session.md) documentation for more information about
+loading, unloading, and querying active extensions.
+
+## Supported Extensions APIs
+
+We support the following extensions APIs, with some caveats. Other APIs may
+additionally be supported, but support for any APIs not listed here is
+provisional and may be removed.
+
+### `chrome.devtools.inspectedWindow`
+
+All features of this API are supported.
+
+### `chrome.devtools.network`
+
+All features of this API are supported.
+
+### `chrome.devtools.panels`
+
+All features of this API are supported.
+
+### `chrome.extension`
+
+The following properties of `chrome.extension` are supported:
+
+- `chrome.extension.lastError`
+
+The following methods of `chrome.extension` are supported:
+
+- `chrome.extension.getURL`
+- `chrome.extension.getBackgroundPage`
+
+### `chrome.runtime`
+
+The following properties of `chrome.runtime` are supported:
+
+- `chrome.runtime.lastError`
+- `chrome.runtime.id`
+
+The following methods of `chrome.runtime` are supported:
+
+- `chrome.runtime.getBackgroundPage`
+- `chrome.runtime.getManifest`
+- `chrome.runtime.getURL`
+- `chrome.runtime.connect`
+- `chrome.runtime.sendMessage`
+
+The following events of `chrome.runtime` are supported:
+
+- `chrome.runtime.onStartup`
+- `chrome.runtime.onInstalled`
+- `chrome.runtime.onSuspend`
+- `chrome.runtime.onSuspendCanceled`
+- `chrome.runtime.onConnect`
+- `chrome.runtime.onMessage`
+
+### `chrome.storage`
+
+Only `chrome.storage.local` is supported; `chrome.storage.sync` and
+`chrome.storage.managed` are not.
+
+### `chrome.tabs`
+
+The following methods of `chrome.tabs` are supported:
+
+- `chrome.tabs.sendMessage`
+- `chrome.tabs.executeScript`
+
+> **Note:** In Chrome, passing `-1` as a tab ID signifies the "currently active
+> tab". Since Electron has no such concept, passing `-1` as a tab ID is not
+> supported and will raise an error.
+
+### `chrome.management`
+
+The following methods of `chrome.management` are supported:
+
+- `chrome.management.getAll`
+- `chrome.management.get`
+- `chrome.management.getSelf`
+- `chrome.management.getPermissionWarningsById`
+- `chrome.management.getPermissionWarningsByManifest`
+- `chrome.management.onEnabled`
+- `chrome.management.onDisabled`
+
+### `chrome.webRequest`
+
+All features of this API are supported.
+
+> **NOTE:** Electron's [`webRequest`](web-request.md) module takes precedence over `chrome.webRequest` if there are conflicting handlers.
--- a/docs/api/frameless-window.md
+++ b/docs/api/frameless-window.md
@@ -52,7 +52,7 @@ win.show()
 Uses custom drawn close, and miniaturize buttons that display
 when hovering in the top left of the window. The fullscreen button
 is not available due to restrictions of frameless windows as they
-interface with Apple's MacOS window masks. These custom buttons prevent
+interface with Apple's macOS window masks. These custom buttons prevent
 issues with mouse events that occur with the standard window toolbar buttons.
 This option is only applicable for frameless windows.

@@ -158,7 +158,7 @@ buttons in titlebar non-draggable.

 ## Text selection

-In a frameless window the dragging behaviour may conflict with selecting text.
+In a frameless window the dragging behavior may conflict with selecting text.
 For example, when you drag the titlebar you may accidentally select the text on
 the titlebar. To prevent this, you need to disable text selection within a
 draggable area like this:
--- a/docs/api/global-shortcut.md
+++ b/docs/api/global-shortcut.md
@@ -9,13 +9,13 @@ with the operating system so that you can customize the operations for various
 shortcuts.

 **Note:** The shortcut is global; it will work even if the app does
-not have the keyboard focus. You should not use this module until the `ready`
+not have the keyboard focus. This module cannot be used before the `ready`
 event of the app module is emitted.

 ```javascript
 const { app, globalShortcut } = require('electron')

-app.on('ready', () => {
+app.whenReady().then(() => {
  // Register a 'CommandOrControl+X' shortcut listener.
  const ret = globalShortcut.register('CommandOrControl+X', () => {
    console.log('CommandOrControl+X is pressed')
--- a/docs/api/in-app-purchase.md
+++ b/docs/api/in-app-purchase.md
@@ -40,11 +40,17 @@ Retrieves the product descriptions.

 ### `inAppPurchase.canMakePayments()`

-Returns `Boolean`, whether a user can make a payment.
+Returns `Boolean` - whether a user can make a payment.
+
+### `inAppPurchase.restoreCompletedTransactions()`
+
+Restores finished transactions. This method can be called either to install purchases on additional devices, or to restore purchases for an application that the user deleted and reinstalled.
+
+[The payment queue](https://developer.apple.com/documentation/storekit/skpaymentqueue?language=objc) delivers a new transaction for each previously completed transaction that can be restored. Each transaction includes a copy of the original transaction.

 ### `inAppPurchase.getReceiptURL()`

-Returns `String`, the path to the receipt.
+Returns `String` - the path to the receipt.

 ### `inAppPurchase.finishAllTransactions()`

--- a/docs/api/incoming-message.md
+++ b/docs/api/incoming-message.md
@@ -51,12 +51,17 @@ A `String` representing the HTTP status message.

 #### `response.headers`

-An `Record<string, string[]>` representing the response HTTP headers. The `headers` object is
+A `Record<string, string | string[]>` representing the HTTP response headers. The `headers` object is
 formatted as follows:

 * All header names are lowercased.
-* Each header name produces an array-valued property on the headers object.
-* Each header value is pushed into the array associated with its header name.
+* Duplicates of `age`, `authorization`, `content-length`, `content-type`,
+`etag`, `expires`, `from`, `host`, `if-modified-since`, `if-unmodified-since`,
+`last-modified`, `location`, `max-forwards`, `proxy-authorization`, `referer`,
+`retry-after`, `server`, or `user-agent` are discarded.
+* `set-cookie` is always an array. Duplicates are added to the array.
+* For duplicate `cookie` headers, the values are joined together with '; '.
+* For all other headers, the values are joined together with ', '.

 #### `response.httpVersion`

--- a/docs/api/ipc-main.md
+++ b/docs/api/ipc-main.md
@@ -77,6 +77,7 @@ only the next time a message is sent to `channel`, after which it is removed.

 * `channel` String
 * `listener` Function
+  * `...args` any[]

 Removes the specified `listener` from the listener array for the specified
 `channel`.
@@ -90,7 +91,7 @@ Removes listeners of the specified `channel`.
 ### `ipcMain.handle(channel, listener)`

 * `channel` String
-* `listener` Function<Promise<void> | any>
+* `listener` Function<Promise\<void> | any>
  * `event` IpcMainInvokeEvent
  * `...args` any[]

@@ -122,7 +123,7 @@ WebContents is the source of the invoke request.
 ### `ipcMain.handleOnce(channel, listener)`

 * `channel` String
-* `listener` Function<Promise<void> | any>
+* `listener` Function<Promise\<void> | any>
  * `event` IpcMainInvokeEvent
  * `...args` any[]

--- a/docs/api/ipc-renderer.md
+++ b/docs/api/ipc-renderer.md
@@ -57,17 +57,25 @@ Removes all listeners, or those of the specified `channel`.

 Send an asynchronous message to the main process via `channel`, along with
 arguments. Arguments will be serialized with the [Structured Clone
-Algorithm][SCA], just like [`postMessage`][], so prototype chains will not be
+Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will not be
 included. Sending Functions, Promises, Symbols, WeakMaps, or WeakSets will
 throw an exception.

-> **NOTE**: Sending non-standard JavaScript types such as DOM objects or
-> special Electron objects is deprecated, and will begin throwing an exception
-> starting with Electron 9.
+> **NOTE:** Sending non-standard JavaScript types such as DOM objects or
+> special Electron objects will throw an exception.
+>
+> Since the main process does not have support for DOM objects such as
+> `ImageBitmap`, `File`, `DOMMatrix` and so on, such objects cannot be sent over
+> Electron's IPC to the main process, as the main process would have no way to decode
+> them. Attempting to send such objects over IPC will result in an error.

 The main process handles it by listening for `channel` with the
 [`ipcMain`](ipc-main.md) module.

+If you need to transfer a [`MessagePort`][] to the main process, use [`ipcRenderer.postMessage`](#ipcrendererpostmessagechannel-message-transfer).
+
+If you want to receive a single response from the main process, like the result of a method call, consider using [`ipcRenderer.invoke`](#ipcrendererinvokechannel-args).
+
 ### `ipcRenderer.invoke(channel, ...args)`

 * `channel` String
@@ -77,13 +85,17 @@ Returns `Promise<any>` - Resolves with the response from the main process.

 Send a message to the main process via `channel` and expect a result
 asynchronously. Arguments will be serialized with the [Structured Clone
-Algorithm][SCA], just like [`postMessage`][], so prototype chains will not be
+Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will not be
 included. Sending Functions, Promises, Symbols, WeakMaps, or WeakSets will
 throw an exception.

-> **NOTE**: Sending non-standard JavaScript types such as DOM objects or
-> special Electron objects is deprecated, and will begin throwing an exception
-> starting with Electron 9.
+> **NOTE:** Sending non-standard JavaScript types such as DOM objects or
+> special Electron objects will throw an exception.
+>
+> Since the main process does not have support for DOM objects such as
+> `ImageBitmap`, `File`, `DOMMatrix` and so on, such objects cannot be sent over
+> Electron's IPC to the main process, as the main process would have no way to decode
+> them. Attempting to send such objects over IPC will result in an error.

 The main process should listen for `channel` with
 [`ipcMain.handle()`](ipc-main.md#ipcmainhandlechannel-listener).
@@ -102,6 +114,10 @@ ipcMain.handle('some-name', async (event, someArgument) => {
 })
 ```

+If you need to transfer a [`MessagePort`][] to the main process, use [`ipcRenderer.postMessage`](#ipcrendererpostmessagechannel-message-transfer).
+
+If you do not need a respons to the message, consider using [`ipcRenderer.send`](#ipcrenderersendchannel-args).
+
 ### `ipcRenderer.sendSync(channel, ...args)`

 * `channel` String
@@ -111,13 +127,17 @@ Returns `any` - The value sent back by the [`ipcMain`](ipc-main.md) handler.

 Send a message to the main process via `channel` and expect a result
 synchronously. Arguments will be serialized with the [Structured Clone
-Algorithm][SCA], just like [`postMessage`][], so prototype chains will not be
+Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will not be
 included. Sending Functions, Promises, Symbols, WeakMaps, or WeakSets will
 throw an exception.

-> **NOTE**: Sending non-standard JavaScript types such as DOM objects or
-> special Electron objects is deprecated, and will begin throwing an exception
-> starting with Electron 9.
+> **NOTE:** Sending non-standard JavaScript types such as DOM objects or
+> special Electron objects will throw an exception.
+>
+> Since the main process does not have support for DOM objects such as
+> `ImageBitmap`, `File`, `DOMMatrix` and so on, such objects cannot be sent over
+> Electron's IPC to the main process, as the main process would have no way to decode
+> them. Attempting to send such objects over IPC will result in an error.

 The main process handles it by listening for `channel` with [`ipcMain`](ipc-main.md) module,
 and replies by setting `event.returnValue`.
@@ -127,6 +147,35 @@ and replies by setting `event.returnValue`.
 > last resort. It's much better to use the asynchronous version,
 > [`invoke()`](ipc-renderer.md#ipcrendererinvokechannel-args).

+### `ipcRenderer.postMessage(channel, message, [transfer])`
+
+* `channel` String
+* `message` any
+* `transfer` MessagePort[] (optional)
+
+Send a message to the main process, optionally transferring ownership of zero
+or more [`MessagePort`][] objects.
+
+The transferred `MessagePort` objects will be available in the main process as
+[`MessagePortMain`](message-port-main.md) objects by accessing the `ports`
+property of the emitted event.
+
+For example:
+```js
+// Renderer process
+const { port1, port2 } = new MessageChannel()
+ipcRenderer.postMessage('port', { message: 'hello' }, [port1])
+
+// Main process
+ipcMain.on('port', (e, msg) => {
+  const [port] = e.ports
+  // ...
+})
+```
+
+For more information on using `MessagePort` and `MessageChannel`, see the [MDN
+documentation](https://developer.mozilla.org/en-US/docs/Web/API/MessageChannel).
+
 ### `ipcRenderer.sendTo(webContentsId, channel, ...args)`

 * `webContentsId` Number
@@ -150,4 +199,5 @@ in the [`ipc-renderer-event`](structures/ipc-renderer-event.md) structure docs.

 [event-emitter]: https://nodejs.org/api/events.html#events_class_eventemitter
 [SCA]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm
-[`postMessage`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
+[`window.postMessage`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
+[`MessagePort`]: https://developer.mozilla.org/en-US/docs/Web/API/MessagePort
--- a/docs/api/menu-item.md
+++ b/docs/api/menu-item.md
@@ -12,9 +12,9 @@ See [`Menu`](menu.md) for examples.
  * `click` Function (optional) - Will be called with
    `click(menuItem, browserWindow, event)` when the menu item is clicked.
    * `menuItem` MenuItem
-    * `browserWindow` [BrowserWindow](browser-window.md)
+    * `browserWindow` [BrowserWindow](browser-window.md) | undefined - This will not be defined if no window is open.
    * `event` [KeyboardEvent](structures/keyboard-event.md)
-  * `role` String (optional) - Can be `undo`, `redo`, `cut`, `copy`, `paste`, `pasteAndMatchStyle`, `delete`, `selectAll`, `reload`, `forceReload`, `toggleDevTools`, `resetZoom`, `zoomIn`, `zoomOut`, `togglefullscreen`, `window`, `minimize`, `close`, `help`, `about`, `services`, `hide`, `hideOthers`, `unhide`, `quit`, `startSpeaking`, `stopSpeaking`, `close`, `minimize`, `zoom`, `front`, `appMenu`, `fileMenu`, `editMenu`, `viewMenu`, `recentDocuments`, `toggleTabBar`, `selectNextTab`, `selectPreviousTab`, `mergeAllWindows`, `clearRecentDocuments`, `moveTabToNewWindow` or `windowMenu` - Define the action of the menu item, when specified the
+  * `role` String (optional) - Can be `undo`, `redo`, `cut`, `copy`, `paste`, `pasteAndMatchStyle`, `delete`, `selectAll`, `reload`, `forceReload`, `toggleDevTools`, `resetZoom`, `zoomIn`, `zoomOut`, `togglefullscreen`, `window`, `minimize`, `close`, `help`, `about`, `services`, `hide`, `hideOthers`, `unhide`, `quit`, `startSpeaking`, `stopSpeaking`, `zoom`, `front`, `appMenu`, `fileMenu`, `editMenu`, `viewMenu`, `recentDocuments`, `toggleTabBar`, `selectNextTab`, `selectPreviousTab`, `mergeAllWindows`, `clearRecentDocuments`, `moveTabToNewWindow` or `windowMenu` - Define the action of the menu item, when specified the
    `click` property will be ignored. See [roles](#roles).
  * `type` String (optional) - Can be `normal`, `separator`, `submenu`, `checkbox` or
    `radio`.
@@ -69,6 +69,7 @@ a `type`.
 The `role` property can have following values:

 * `undo`
+* `about` - Trigger a native about panel (custom message box on Window, which does not provide its own).
 * `redo`
 * `cut`
 * `copy`
@@ -94,7 +95,6 @@ The `role` property can have following values:
 The following additional roles are available on _macOS_:

 * `appMenu` - Whole default "App" menu (About, Services, etc.)
-* `about` - Map to the `orderFrontStandardAboutPanel` action.
 * `hide` - Map to the `hide` action.
 * `hideOthers` - Map to the `hideOtherApplications` action.
 * `unhide` - Map to the `unhideAllApplications` action.
@@ -117,7 +117,7 @@ When specifying a `role` on macOS, `label` and `accelerator` are the only
 options that will affect the menu item. All other options will be ignored.
 Lowercase `role`, e.g. `toggledevtools`, is still supported.

-**Nota Bene:** The `enabled` and `visibility` properties are not available for top-level menu items in the tray on MacOS.
+**Nota Bene:** The `enabled` and `visibility` properties are not available for top-level menu items in the tray on macOS.

 ### Instance Properties

@@ -130,8 +130,7 @@ dynamically changed.

 #### `menuItem.label`

-A `String` indicating the item's visible label, this property can be
-dynamically changed.
+A `String` indicating the item's visible label.

 #### `menuItem.click`

@@ -152,7 +151,7 @@ A `String` indicating the type of the item. Can be `normal`, `separator`, `subme

 #### `menuItem.role`

-A `String` (optional) indicating the item's role, if set. Can be `undo`, `redo`, `cut`, `copy`, `paste`, `pasteAndMatchStyle`, `delete`, `selectAll`, `reload`, `forceReload`, `toggleDevTools`, `resetZoom`, `zoomIn`, `zoomOut`, `togglefullscreen`, `window`, `minimize`, `close`, `help`, `about`, `services`, `hide`, `hideOthers`, `unhide`, `quit`, `startSpeaking`, `stopSpeaking`, `close`, `minimize`, `zoom`, `front`, `appMenu`, `fileMenu`, `editMenu`, `viewMenu`, `recentDocuments`, `toggleTabBar`, `selectNextTab`, `selectPreviousTab`, `mergeAllWindows`, `clearRecentDocuments`, `moveTabToNewWindow` or `windowMenu`
+A `String` (optional) indicating the item's role, if set. Can be `undo`, `redo`, `cut`, `copy`, `paste`, `pasteAndMatchStyle`, `delete`, `selectAll`, `reload`, `forceReload`, `toggleDevTools`, `resetZoom`, `zoomIn`, `zoomOut`, `togglefullscreen`, `window`, `minimize`, `close`, `help`, `about`, `services`, `hide`, `hideOthers`, `unhide`, `quit`, `startSpeaking`, `stopSpeaking`, `zoom`, `front`, `appMenu`, `fileMenu`, `editMenu`, `viewMenu`, `recentDocuments`, `toggleTabBar`, `selectNextTab`, `selectPreviousTab`, `mergeAllWindows`, `clearRecentDocuments`, `moveTabToNewWindow` or `windowMenu`

 #### `menuItem.accelerator`

@@ -165,7 +164,7 @@ item's icon, if set.

 #### `menuItem.sublabel`

-A `String` indicating the item's sublabel, this property can be dynamically changed.
+A `String` indicating the item's sublabel.

 #### `menuItem.toolTip` _macOS_

@@ -197,7 +196,9 @@ You can add a `click` function for additional behavior.
 #### `menuItem.registerAccelerator`

 A `Boolean` indicating if the accelerator should be registered with the
-system or just displayed, this property can be dynamically changed.
+system or just displayed.
+
+This property can be dynamically changed.

 #### `menuItem.commandId`

--- a/docs/api/message-channel-main.md
+++ b/docs/api/message-channel-main.md
@@ -0,0 +1,32 @@
+# MessageChannelMain
+
+`MessageChannelMain` is the main-process-side equivalent of the DOM
+[`MessageChannel`][] object. Its singular function is to create a pair of
+connected [`MessagePortMain`](message-port-main.md) objects.
+
+See the [Channel Messaging API][] documentation for more information on using
+channel messaging.
+
+## Class: MessageChannelMain
+
+Process: [Main](../glossary.md#main-process)
+
+Example:
+```js
+const { port1, port2 } = new MessageChannelMain()
+w.webContents.postMessage('port', null, [port2])
+port1.postMessage({ some: 'message' })
+```
+
+### Instance Properties
+
+#### `channel.port1`
+
+A [`MessagePortMain`](message-port-main.md) property.
+
+#### `channel.port2`
+
+A [`MessagePortMain`](message-port-main.md) property.
+
+[`MessageChannel`]: https://developer.mozilla.org/en-US/docs/Web/API/MessageChannel
+[Channel Messaging API]: https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API
--- a/docs/api/message-port-main.md
+++ b/docs/api/message-port-main.md
@@ -0,0 +1,55 @@
+# MessagePortMain
+
+`MessagePortMain` is the main-process-side equivalent of the DOM
+[`MessagePort`][] object. It behaves similarly to the DOM version, with the
+exception that it uses the Node.js `EventEmitter` event system, instead of the
+DOM `EventTarget` system. This means you should use `port.on('message', ...)`
+to listen for events, instead of `port.onmessage = ...` or
+`port.addEventListener('message', ...)`
+
+See the [Channel Messaging API][] documentation for more information on using
+channel messaging.
+
+`MessagePortMain` is an [EventEmitter][event-emitter].
+
+## Class: MessagePortMain
+
+Process: [Main](../glossary.md#main-process)
+
+### Instance Methods
+
+#### `port.postMessage(message, [transfer])`
+
+* `message` any
+* `transfer` MessagePortMain[] (optional)
+
+Sends a message from the port, and optionally, transfers ownership of objects
+to other browsing contexts.
+
+#### `port.start()`
+
+Starts the sending of messages queued on the port. Messages will be queued
+until this method is called.
+
+#### `port.close()`
+
+Disconnects the port, so it is no longer active.
+
+### Instance Events
+
+#### Event: 'message'
+
+Returns:
+
+* `messageEvent` Object
+  * `data` any
+  * `ports` MessagePortMain[]
+
+Emitted when a MessagePortMain object receives a message.
+
+#### Event: 'close'
+
+Emitted when the remote end of a MessagePortMain object becomes disconnected.
+
+[`MessagePort`]: https://developer.mozilla.org/en-US/docs/Web/API/MessagePort
+[Channel Messaging API]: https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API
--- a/docs/api/modernization/promisification.md
+++ b/docs/api/modernization/promisification.md
@@ -1,17 +1,6 @@
 ## Promisification

-The Electron team is currently undergoing an initiative to convert callback-based functions in Electron to return Promises. During this transition period, both the callback and Promise-based versions of these functions will work correctly, and will both be documented.
-
-To enable deprecation warnings for these updated functions, use the [`process.enablePromiseAPIs` runtime flag](../process.md#processenablepromiseapis).
-
-When a majority of affected functions are migrated, this flag will be enabled by default and all developers will be able to see these deprecation warnings. At that time, the callback-based versions will also be removed from documentation. This document will be continuously updated as more functions are converted.
-
-### Candidate Functions
-
- [app.importCertificate(options, callback)](https://github.com/electron/electron/blob/master/docs/api/app.md#importCertificate)
- [contents.print([options], [callback])](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#print)
-
-### Converted Functions
+The Electron team recently underwent an initiative to convert callback-based APIs to Promise-based ones. See converted functions below:

 - [app.getFileIcon(path[, options], callback)](https://github.com/electron/electron/blob/master/docs/api/app.md#getFileIcon)
 - [contents.capturePage([rect, ]callback)](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#capturePage)
--- a/docs/api/modernization/property-updates.md
+++ b/docs/api/modernization/property-updates.md
@@ -5,14 +5,7 @@ The Electron team is currently undergoing an initiative to convert separate gett
 ## Candidates

 * `BrowserWindow`
-  * `fullscreen`
-  * `simpleFullscreen`
-  * `alwaysOnTop`
-  * `title`
-  * `documentEdited`
-  * `hasShadow`
  * `menubarVisible`
-  * `visibleOnAllWorkspaces`
 * `crashReporter` module
  * `uploadToServer`
 * `webFrame` modules
@@ -41,13 +34,8 @@ The Electron team is currently undergoing an initiative to convert separate gett
  * `fullscreenable`
  * `movable`
  * `closable`
+  * `backgroundThrottling`
 * `NativeImage`
  * `isMacTemplateImage`
 * `SystemPreferences` module
  * `appLevelAppearance`
-* `webContents` module
-  * `audioMuted`
-  * `frameRate`
-  * `userAgent`
-  * `zoomFactor`
-  * `zoomLevel`
--- a/docs/api/native-image.md
+++ b/docs/api/native-image.md
@@ -119,6 +119,13 @@ Returns `NativeImage`

 Creates an empty `NativeImage` instance.

+### `nativeImage.createThumbnailFromPath(path, maxSize)` _macOS_ _Windows_
+
+* `path` String - path to a file that we intend to construct a thumbnail out of.
+* `maxSize` [Size](structures/size.md) - the maximum width and height (positive numbers) the thumbnail returned can be. The Windows implementation will ignore `maxSize.height` and scale the height according to `maxSize.width`.
+
+Returns `Promise<NativeImage>` - fulfilled with the file's thumbnail preview image, which is a [NativeImage](native-image.md).
+
 ### `nativeImage.createFromPath(path)`

 * `path` String
@@ -266,9 +273,13 @@ image instead of a copy, so you _must_ ensure that the associated

 Returns `Boolean` - Whether the image is empty.

-#### `image.getSize()`
+#### `image.getSize([scaleFactor])`

-Returns [`Size`](structures/size.md)
+* `scaleFactor` Double (optional) - Defaults to 1.0.
+
+Returns [`Size`](structures/size.md).
+
+If `scaleFactor` is passed, this will return the size corresponding to the image representation most closely matching the passed value.

 #### `image.setTemplateImage(option)`

@@ -276,14 +287,10 @@ Returns [`Size`](structures/size.md)

 Marks the image as a template image.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `image.isTemplateImage()`

 Returns `Boolean` - Whether the image is a template image.

-**[Deprecated](modernization/property-updates.md)**
-
 #### `image.crop(rect)`

 * `rect` [Rectangle](structures/rectangle.md) - The area of the image to crop.
@@ -307,10 +314,18 @@ Returns `NativeImage` - The resized image.
 If only the `height` or the `width` are specified then the current aspect ratio
 will be preserved in the resized image.

-#### `image.getAspectRatio()`
+#### `image.getAspectRatio([scaleFactor])`
+
+* `scaleFactor` Double (optional) - Defaults to 1.0.

 Returns `Float` - The image's aspect ratio.

+If `scaleFactor` is passed, this will return the aspect ratio corresponding to the image representation most closely matching the passed value.
+
+#### `image.getScaleFactors()`
+
+Returns `Float[]` - An array of all scale factors corresponding to representations for a given nativeImage.
+
 #### `image.addRepresentation(options)`

 * `options` Object
@@ -329,9 +344,9 @@ can be called on empty images.

 [buffer]: https://nodejs.org/api/buffer.html#buffer_class_buffer

-## Properties
+### Instance Properties

-### `nativeImage.isMacTemplateImage` _macOS_
+#### `nativeImage.isMacTemplateImage` _macOS_

 A `Boolean` property that determines whether the image is considered a [template image](https://developer.apple.com/documentation/appkit/nsimage/1520017-template).

--- a/docs/api/native-theme.md
+++ b/docs/api/native-theme.md
@@ -27,7 +27,7 @@ should use `themeSource` below.

 ### `nativeTheme.themeSource`

-A `String` property that can be `system`, `light` or `dark`.  It is used to override and supercede
+A `String` property that can be `system`, `light` or `dark`.  It is used to override and supersede
 the value that Chromium has chosen to use internally.

 Setting this property to `system` will remove the override and
--- a/docs/api/net-log.md
+++ b/docs/api/net-log.md
@@ -7,7 +7,7 @@ Process: [Main](../glossary.md#main-process)
 ```javascript
 const { netLog } = require('electron')

-app.on('ready', async () => {
+app.whenReady().then(async () => {
  await netLog.startLogging('/path/to/net-log')
  // After some network events
  const path = await netLog.stopLogging()
@@ -40,7 +40,7 @@ Starts recording network events to `path`.

 ### `netLog.stopLogging()`

-Returns `Promise<String>` - resolves with a file path to which network logs were recorded.
+Returns `Promise<void>` - resolves when the net log has been flushed to disk.

 Stops recording network events. If not called, net logging will automatically end when app quits.

@@ -48,8 +48,4 @@ Stops recording network events. If not called, net logging will automatically en

 ### `netLog.currentlyLogging` _Readonly_

-A `Boolean` property that indicates whether network logs are recorded.
-
-### `netLog.currentlyLoggingPath` _Readonly_ _Deprecated_
-
-A `String` property that returns the path to the current log file.
+A `Boolean` property that indicates whether network logs are currently being recorded.
--- a/docs/api/net.md
+++ b/docs/api/net.md
@@ -28,7 +28,7 @@ Example usage:

 ```javascript
 const { app } = require('electron')
-app.on('ready', () => {
+app.whenReady().then(() => {
  const { net } = require('electron')
  const request = net.request('https://github.com')
  request.on('response', (response) => {
--- a/docs/api/notification.md
+++ b/docs/api/notification.md
@@ -26,7 +26,7 @@ The `Notification` class has the following static methods:

 Returns `Boolean` - Whether or not desktop notifications are supported on the current system

-### `new Notification([options])` _Experimental_
+### `new Notification([options])`

 * `options` Object (optional)
  * `title` String - A title for the notification, which will be shown at the top of the notification window when it is shown.
--- a/docs/api/power-monitor.md
+++ b/docs/api/power-monitor.md
@@ -4,39 +4,23 @@

 Process: [Main](../glossary.md#main-process)

-
-This module cannot be used until the `ready` event of the `app`
-module is emitted.
-
-For example:
-
-```javascript
-const { app, powerMonitor } = require('electron')
-
-app.on('ready', () => {
-  powerMonitor.on('suspend', () => {
-    console.log('The system is going to sleep')
-  })
-})
-```
-
 ## Events

 The `powerMonitor` module emits the following events:

-### Event: 'suspend'
+### Event: 'suspend' _macOS_ _Windows_

 Emitted when the system is suspending.

-### Event: 'resume'
+### Event: 'resume' _macOS_ _Windows_

 Emitted when system is resuming.

-### Event: 'on-ac' _Windows_
+### Event: 'on-ac' _macOS_ _Windows_

 Emitted when the system changes to AC power.

-### Event: 'on-battery' _Windows_
+### Event: 'on-battery' _macOS_  _Windows_

 Emitted when system changes to battery power.

--- a/docs/api/process.md
+++ b/docs/api/process.md
@@ -82,12 +82,6 @@ A `Boolean` that controls whether or not deprecation warnings are printed to `st
 Setting this to `true` will silence deprecation warnings. This property is used
 instead of the `--no-deprecation` command line flag.

-### `process.enablePromiseAPIs`
-
-A `Boolean` that controls whether or not deprecation warnings are printed to `stderr` when
-formerly callback-based APIs converted to Promises are invoked using callbacks. Setting this to `true`
-will enable deprecation warnings.
-
 ### `process.resourcesPath` _Readonly_

 A `String` representing the path to the resources directory.
@@ -117,7 +111,11 @@ A `Boolean` that controls whether or not process warnings printed to `stderr` in

 ### `process.type` _Readonly_

-A `String` representing the current process's type, can be `"browser"` (i.e. main process), `"renderer"`, or `"worker"` (i.e. web worker).
+A `String` representing the current process's type, can be:
+
+* `browser` - The main process
+* `renderer` - A renderer process
+* `worker` - In a web worker

 ### `process.versions.chrome` _Readonly_

@@ -217,11 +215,15 @@ that all statistics are reported in Kilobytes.

 Returns `String` - The version of the host operating system.

-Examples:
+Example:

-* `macOS` -> `10.13.6`
-* `Windows` -> `10.0.17763`
-* `Linux` -> `4.15.0-45-generic`
+```js
+const version = process.getSystemVersion()
+console.log(version)
+// On macOS -> '10.13.6'
+// On Windows -> '10.0.17763'
+// On Linux -> '4.15.0-45-generic'
+```

 **Note:** It returns the actual operating system version instead of kernel version on macOS unlike `os.release()`.

--- a/docs/api/protocol-ns.md
+++ b/docs/api/protocol-ns.md
@@ -1,309 +0,0 @@
-# protocol (NetworkService) (Draft)
-
-This document describes the new protocol APIs based on the [NetworkService](https://www.chromium.org/servicification).
-
-We don't currently have an estimate of when we will enable the `NetworkService` by
-default in Electron, but as Chromium is already removing non-`NetworkService`
-code, we will probably switch before Electron 10.
-
-The content of this document should be moved to `protocol.md` after we have
-enabled the `NetworkService` by default in Electron.
-
-> Register a custom protocol and intercept existing protocol requests.
-
-Process: [Main](../glossary.md#main-process)
-
-An example of implementing a protocol that has the same effect as the
-`file://` protocol:
-
-```javascript
-const { app, protocol } = require('electron')
-const path = require('path')
-
-app.on('ready', () => {
-  protocol.registerFileProtocol('atom', (request, callback) => {
-    const url = request.url.substr(7)
-    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  })
-})
-```
-
-**Note:** All methods unless specified can only be used after the `ready` event
-of the `app` module gets emitted.
-
-## Using `protocol` with a custom `partition` or `session`
-
-A protocol is registered to a specific Electron [`session`](./session.md)
-object. If you don't specify a session, then your `protocol` will be applied to
-the default session that Electron uses. However, if you define a `partition` or
-`session` on your `browserWindow`'s `webPreferences`, then that window will use
-a different session and your custom protocol will not work if you just use
-`electron.protocol.XXX`.
-
-To have your custom protocol work in combination with a custom session, you need
-to register it to that session explicitly.
-
-```javascript
-const { session, app, protocol } = require('electron')
-const path = require('path')
-
-app.on('ready', () => {
-  const partition = 'persist:example'
-  const ses = session.fromPartition(partition)
-
-  ses.protocol.registerFileProtocol('atom', (request, callback) => {
-    const url = request.url.substr(7)
-    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  })
-
-  mainWindow = new BrowserWindow({ webPreferences: { partition } })
-})
-```
-
-## Methods
-
-The `protocol` module has the following methods:
-
-### `protocol.registerSchemesAsPrivileged(customSchemes)`
-
-* `customSchemes` [CustomScheme[]](structures/custom-scheme.md)
-
-**Note:** This method can only be used before the `ready` event of the `app`
-module gets emitted and can be called only once.
-
-Registers the `scheme` as standard, secure, bypasses content security policy for
-resources, allows registering ServiceWorker and supports fetch API. Specify a
-privilege with the value of `true` to enable the capability.
-
-An example of registering a privileged scheme, that bypasses Content Security
-Policy:
-
-```javascript
-const { protocol } = require('electron')
-protocol.registerSchemesAsPrivileged([
-  { scheme: 'foo', privileges: { bypassCSP: true } }
-])
-```
-
-A standard scheme adheres to what RFC 3986 calls [generic URI
-syntax](https://tools.ietf.org/html/rfc3986#section-3). For example `http` and
-`https` are standard schemes, while `file` is not.
-
-Registering a scheme as standard allows relative and absolute resources to
-be resolved correctly when served. Otherwise the scheme will behave like the
-`file` protocol, but without the ability to resolve relative URLs.
-
-For example when you load following page with custom protocol without
-registering it as standard scheme, the image will not be loaded because
-non-standard schemes can not recognize relative URLs:
-
-```html
-<body>
-  <img src='test.png'>
-</body>
-```
-
-Registering a scheme as standard will allow access to files through the
-[FileSystem API][file-system-api]. Otherwise the renderer will throw a security
-error for the scheme.
-
-By default web storage apis (localStorage, sessionStorage, webSQL, indexedDB,
-cookies) are disabled for non standard schemes. So in general if you want to
-register a custom protocol to replace the `http` protocol, you have to register
-it as a standard scheme.
-
-### `protocol.registerFileProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a file as the response. The
-`handler` will be called with `request` and `callback` where `request` is
-an incoming request for the `scheme`.
-
-To handle the `request`, the `callback` should be called with either the file's
-path or an object that has a `path` property, e.g. `callback(filePath)` or
-`callback({ path: filePath })`. The `filePath` must be an absolute path.
-
-By default the `scheme` is treated like `http:`, which is parsed differently
-from protocols that follow the "generic URI syntax" like `file:`.
-
-### `protocol.registerBufferProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a `Buffer` as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `Buffer` object or an object that has the `data`
-property.
-
-Example:
-
-```javascript
-protocol.registerBufferProtocol('atom', (request, callback) => {
-  callback({ mimeType: 'text/html', data: Buffer.from('<h5>Response</h5>') })
-})
-```
-
-### `protocol.registerStringProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a `String` as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `String` or an object that has the `data`
-property.
-
-### `protocol.registerHttpProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` ProtocolResponse
-
-Registers a protocol of `scheme` that will send an HTTP request as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with an object that has the `url` property.
-
-### `protocol.registerStreamProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a stream as a response.
-
-The usage is the same with `registerFileProtocol`, except that the
-`callback` should be called with either a [`ReadableStream`](https://nodejs.org/api/stream.html#stream_class_stream_readable) object or an object that
-has the `data` property.
-
-Example:
-
-```javascript
-const { protocol } = require('electron')
-const { PassThrough } = require('stream')
-
-function createStream (text) {
-  const rv = new PassThrough() // PassThrough is also a Readable stream
-  rv.push(text)
-  rv.push(null)
-  return rv
-}
-
-protocol.registerStreamProtocol('atom', (request, callback) => {
-  callback({
-    statusCode: 200,
-    headers: {
-      'content-type': 'text/html'
-    },
-    data: createStream('<h5>Response</h5>')
-  })
-})
-```
-
-It is possible to pass any object that implements the readable stream API (emits
-`data`/`end`/`error` events). For example, here's how a file could be returned:
-
-```javascript
-protocol.registerStreamProtocol('atom', (request, callback) => {
-  callback(fs.createReadStream('index.html'))
-})
-```
-
-### `protocol.unregisterProtocol(scheme)`
-
-* `scheme` String
-
-Unregisters the custom protocol of `scheme`.
-
-### `protocol.isProtocolRegistered(scheme)`
-
-* `scheme` String
-
-Returns `Boolean` - Whether `scheme` is already registered.
-
-### `protocol.interceptFileProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a file as a response.
-
-### `protocol.interceptStringProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a `String` as a response.
-
-### `protocol.interceptBufferProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a `Buffer` as a response.
-
-### `protocol.interceptHttpProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` ProtocolResponse
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a new HTTP request as a response.
-
-### `protocol.interceptStreamProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))
-
-Same as `protocol.registerStreamProtocol`, except that it replaces an existing
-protocol handler.
-
-### `protocol.uninterceptProtocol(scheme)`
-
-* `scheme` String
-
-Remove the interceptor installed for `scheme` and restore its original handler.
-
-### `protocol.isProtocolIntercepted(scheme)`
-
-* `scheme` String
-
-Returns `Boolean` - Whether `scheme` is already intercepted.
-
-[file-system-api]: https://developer.mozilla.org/en-US/docs/Web/API/LocalFileSystem
--- a/docs/api/protocol.md
+++ b/docs/api/protocol.md
@@ -11,12 +11,10 @@ An example of implementing a protocol that has the same effect as the
 const { app, protocol } = require('electron')
 const path = require('path')

-app.on('ready', () => {
+app.whenReady().then(() => {
  protocol.registerFileProtocol('atom', (request, callback) => {
    const url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  }, (error) => {
-    if (error) console.error('Failed to register protocol')
  })
 })
 ```
@@ -26,32 +24,30 @@ of the `app` module gets emitted.

 ## Using `protocol` with a custom `partition` or `session`

-A protocol is registered to a specific Electron [`session`](./session.md) object. If you don't specify a session, then your `protocol` will be applied to the default session that Electron uses. However, if you define a `partition` or `session` on your `browserWindow`'s `webPreferences`, then that window will use a different session and your custom protocol will not work if you just use `electron.protocol.XXX`.
+A protocol is registered to a specific Electron [`session`](./session.md)
+object. If you don't specify a session, then your `protocol` will be applied to
+the default session that Electron uses. However, if you define a `partition` or
+`session` on your `browserWindow`'s `webPreferences`, then that window will use
+a different session and your custom protocol will not work if you just use
+`electron.protocol.XXX`.

-To have your custom protocol work in combination with a custom session, you need to register it to that session explicitly.
+To have your custom protocol work in combination with a custom session, you need
+to register it to that session explicitly.

 ```javascript
 const { session, app, protocol } = require('electron')
 const path = require('path')

-app.on('ready', () => {
+app.whenReady().then(() => {
  const partition = 'persist:example'
  const ses = session.fromPartition(partition)

  ses.protocol.registerFileProtocol('atom', (request, callback) => {
    const url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  }, (error) => {
-    if (error) console.error('Failed to register protocol')
  })

-  mainWindow = new BrowserWindow({
-    width: 800,
-    height: 600,
-    webPreferences: {
-      partition: partition
-    }
-  })
+  mainWindow = new BrowserWindow({ webPreferences: { partition } })
 })
 ```

@@ -63,15 +59,15 @@ The `protocol` module has the following methods:

 * `customSchemes` [CustomScheme[]](structures/custom-scheme.md)

-
 **Note:** This method can only be used before the `ready` event of the `app`
 module gets emitted and can be called only once.

-Registers the `scheme` as standard, secure, bypasses content security policy for resources,
-allows registering ServiceWorker and supports fetch API.
+Registers the `scheme` as standard, secure, bypasses content security policy for
+resources, allows registering ServiceWorker and supports fetch API. Specify a
+privilege with the value of `true` to enable the capability.

-Specify a privilege with the value of `true` to enable the capability.
-An example of registering a privileged scheme, with bypassing Content Security Policy:
+An example of registering a privileged scheme, that bypasses Content Security
+Policy:

 ```javascript
 const { protocol } = require('electron')
@@ -84,7 +80,7 @@ A standard scheme adheres to what RFC 3986 calls [generic URI
 syntax](https://tools.ietf.org/html/rfc3986#section-3). For example `http` and
 `https` are standard schemes, while `file` is not.

-Registering a scheme as standard, will allow relative and absolute resources to
+Registering a scheme as standard allows relative and absolute resources to
 be resolved correctly when served. Otherwise the scheme will behave like the
 `file` protocol, but without the ability to resolve relative URLs.

@@ -102,168 +98,102 @@ Registering a scheme as standard will allow access to files through the
 [FileSystem API][file-system-api]. Otherwise the renderer will throw a security
 error for the scheme.

-By default web storage apis (localStorage, sessionStorage, webSQL, indexedDB, cookies)
-are disabled for non standard schemes. So in general if you want to register a
-custom protocol to replace the `http` protocol, you have to register it as a standard scheme.
+By default web storage apis (localStorage, sessionStorage, webSQL, indexedDB,
+cookies) are disabled for non standard schemes. So in general if you want to
+register a custom protocol to replace the `http` protocol, you have to register
+it as a standard scheme.

-`protocol.registerSchemesAsPrivileged` can be used to replicate the functionality of the previous `protocol.registerStandardSchemes`, `webFrame.registerURLSchemeAs*` and `protocol.registerServiceWorkerSchemes` functions that existed prior to Electron 5.0.0, for example:
-
-**before (<= v4.x)**
-```javascript
-// Main
-protocol.registerStandardSchemes(['scheme1', 'scheme2'], { secure: true })
-// Renderer
-webFrame.registerURLSchemeAsPrivileged('scheme1', { secure: true })
-webFrame.registerURLSchemeAsPrivileged('scheme2', { secure: true })
-```
-
-**after (>= v5.x)**
-```javascript
-protocol.registerSchemesAsPrivileged([
-  { scheme: 'scheme1', privileges: { standard: true, secure: true } },
-  { scheme: 'scheme2', privileges: { standard: true, secure: true } }
-])
-```
-
-### `protocol.registerFileProtocol(scheme, handler[, completion])`
+### `protocol.registerFileProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `filePath` String | [FilePathWithHeaders](structures/file-path-with-headers.md) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (String | [ProtocolResponse](structures/protocol-response.md))

-Registers a protocol of `scheme` that will send the file as a response. The
-`handler` will be called with `handler(request, callback)` when a `request` is
-going to be created with `scheme`. `completion` will be called with
-`completion(null)` when `scheme` is successfully registered or
-`completion(error)` when failed.
+Returns `Boolean` - Whether the protocol was successfully registered
+
+Registers a protocol of `scheme` that will send a file as the response. The
+`handler` will be called with `request` and `callback` where `request` is
+an incoming request for the `scheme`.

 To handle the `request`, the `callback` should be called with either the file's
 path or an object that has a `path` property, e.g. `callback(filePath)` or
-`callback({ path: filePath })`. The object may also have a `headers` property
-which gives a map of headers to values for the response headers, e.g.
-`callback({ path: filePath, headers: {"Content-Security-Policy": "default-src 'none'"]})`.
-
-When `callback` is called with nothing, a number, or an object that has an
-`error` property, the `request` will fail with the `error` number you
-specified. For the available error numbers you can use, please see the
-[net error list][net-error].
+`callback({ path: filePath })`. The `filePath` must be an absolute path.

 By default the `scheme` is treated like `http:`, which is parsed differently
-than protocols that follow the "generic URI syntax" like `file:`.
+from protocols that follow the "generic URI syntax" like `file:`.

-### `protocol.registerBufferProtocol(scheme, handler[, completion])`
+### `protocol.registerBufferProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `buffer` (Buffer | [MimeTypedBuffer](structures/mime-typed-buffer.md)) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully registered

 Registers a protocol of `scheme` that will send a `Buffer` as a response.

 The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `Buffer` object or an object that has the `data`,
-`mimeType`, and `charset` properties.
+should be called with either a `Buffer` object or an object that has the `data`
+property.

 Example:

 ```javascript
-const { protocol } = require('electron')
-
 protocol.registerBufferProtocol('atom', (request, callback) => {
  callback({ mimeType: 'text/html', data: Buffer.from('<h5>Response</h5>') })
-}, (error) => {
-  if (error) console.error('Failed to register protocol')
 })
 ```

-### `protocol.registerStringProtocol(scheme, handler[, completion])`
+### `protocol.registerStringProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `data` (String | [StringProtocolResponse](structures/string-protocol-response.md)) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully registered

 Registers a protocol of `scheme` that will send a `String` as a response.

 The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `String` or an object that has the `data`,
-`mimeType`, and `charset` properties.
+should be called with either a `String` or an object that has the `data`
+property.

-### `protocol.registerHttpProtocol(scheme, handler[, completion])`
+### `protocol.registerHttpProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `redirectRequest` Object
-      * `url` String
-      * `method` String (optional)
-      * `session` Session | null (optional)
-      * `uploadData` [ProtocolResponseUploadData](structures/protocol-response-upload-data.md) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` ProtocolResponse
+
+Returns `Boolean` - Whether the protocol was successfully registered

 Registers a protocol of `scheme` that will send an HTTP request as a response.

 The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with a `redirectRequest` object that has the `url`, `method`,
-`referrer`, `uploadData` and `session` properties.
+should be called with an object that has the `url` property.

-By default the HTTP request will reuse the current session. If you want the
-request to have a different session you should set `session` to `null`.
-
-For POST requests the `uploadData` object must be provided.
-
-### `protocol.registerStreamProtocol(scheme, handler[, completion])`
+### `protocol.registerStreamProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `stream` (ReadableStream | [StreamProtocolResponse](structures/stream-protocol-response.md)) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))

-Registers a protocol of `scheme` that will send a `Readable` as a response.
+Returns `Boolean` - Whether the protocol was successfully registered

-The usage is similar to the other `register{Any}Protocol`, except that the
-`callback` should be called with either a `Readable` object or an object that
-has the `data`, `statusCode`, and `headers` properties.
+Registers a protocol of `scheme` that will send a stream as a response.
+
+The usage is the same with `registerFileProtocol`, except that the
+`callback` should be called with either a [`ReadableStream`](https://nodejs.org/api/stream.html#stream_class_stream_readable) object or an object that
+has the `data` property.

 Example:

@@ -286,8 +216,6 @@ protocol.registerStreamProtocol('atom', (request, callback) => {
    },
    data: createStream('<h5>Response</h5>')
  })
-}, (error) => {
-  if (error) console.error('Failed to register protocol')
 })
 ```

@@ -295,134 +223,102 @@ It is possible to pass any object that implements the readable stream API (emits
 `data`/`end`/`error` events). For example, here's how a file could be returned:

 ```javascript
-const { protocol } = require('electron')
-const fs = require('fs')
-
 protocol.registerStreamProtocol('atom', (request, callback) => {
  callback(fs.createReadStream('index.html'))
-}, (error) => {
-  if (error) console.error('Failed to register protocol')
 })
 ```

-### `protocol.unregisterProtocol(scheme[, completion])`
+### `protocol.unregisterProtocol(scheme)`

 * `scheme` String
-* `completion` Function (optional)
-  * `error` Error
+
+Returns `Boolean` - Whether the protocol was successfully unregistered

 Unregisters the custom protocol of `scheme`.

-### `protocol.isProtocolHandled(scheme)`
+### `protocol.isProtocolRegistered(scheme)`

 * `scheme` String

-Returns `Promise<Boolean>` - fulfilled with a boolean that indicates whether there is
-already a handler for `scheme`.
+Returns `Boolean` - Whether `scheme` is already registered.

-### `protocol.interceptFileProtocol(scheme, handler[, completion])`
+### `protocol.interceptFileProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `filePath` String
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully intercepted

 Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
 which sends a file as a response.

-### `protocol.interceptStringProtocol(scheme, handler[, completion])`
+### `protocol.interceptStringProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `data` (String | [StringProtocolResponse](structures/string-protocol-response.md)) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully intercepted

 Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
 which sends a `String` as a response.

-### `protocol.interceptBufferProtocol(scheme, handler[, completion])`
+### `protocol.interceptBufferProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `buffer` Buffer (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully intercepted

 Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
 which sends a `Buffer` as a response.

-### `protocol.interceptHttpProtocol(scheme, handler[, completion])`
+### `protocol.interceptHttpProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `redirectRequest` Object
-      * `url` String
-      * `method` String (optional)
-      * `session` Session | null (optional)
-      * `uploadData` Object (optional)
-        * `contentType` String - MIME type of the content.
-        * `data` String - Content to be sent.
-* `completion` Function (optional)
-  * `error` Error
+    * `response` [ProtocolResponse](structures/protocol-response.md)
+
+Returns `Boolean` - Whether the protocol was successfully intercepted

 Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
 which sends a new HTTP request as a response.

-### `protocol.interceptStreamProtocol(scheme, handler[, completion])`
+### `protocol.interceptStreamProtocol(scheme, handler)`

 * `scheme` String
 * `handler` Function
-  * `request` Object
-    * `url` String
-    * `headers` Record<String, String>
-    * `referrer` String
-    * `method` String
-    * `uploadData` [UploadData[]](structures/upload-data.md)
+  * `request` ProtocolRequest
  * `callback` Function
-    * `stream` (ReadableStream | [StreamProtocolResponse](structures/stream-protocol-response.md)) (optional)
-* `completion` Function (optional)
-  * `error` Error
+    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))
+
+Returns `Boolean` - Whether the protocol was successfully intercepted

 Same as `protocol.registerStreamProtocol`, except that it replaces an existing
 protocol handler.

-### `protocol.uninterceptProtocol(scheme[, completion])`
+### `protocol.uninterceptProtocol(scheme)`

 * `scheme` String
-* `completion` Function (optional)
-  * `error` Error
+
+Returns `Boolean` - Whether the protocol was successfully unintercepted

 Remove the interceptor installed for `scheme` and restore its original handler.

-[net-error]: https://code.google.com/p/chromium/codesearch#chromium/src/net/base/net_error_list.h
+### `protocol.isProtocolIntercepted(scheme)`
+
+* `scheme` String
+
+Returns `Boolean` - Whether `scheme` is already intercepted.
+
 [file-system-api]: https://developer.mozilla.org/en-US/docs/Web/API/LocalFileSystem
--- a/docs/api/remote.md
+++ b/docs/api/remote.md
@@ -163,7 +163,7 @@ project/
 ```js
 // main process: main/index.js
 const { app } = require('electron')
-app.on('ready', () => { /* ... */ })
+app.whenReady().then(() => { /* ... */ })
 ```

 ```js
--- a/docs/api/sandbox-option.md
+++ b/docs/api/sandbox-option.md
@@ -39,7 +39,7 @@ To create a sandboxed window, pass `sandbox: true` to `webPreferences`:

 ```js
 let win
-app.on('ready', () => {
+app.whenReady().then(() => {
  win = new BrowserWindow({
    webPreferences: {
      sandbox: true
@@ -51,15 +51,15 @@ app.on('ready', () => {

 In the above code the [`BrowserWindow`](browser-window.md) that was created has Node.js disabled and can communicate
 only via IPC. The use of this option stops Electron from creating a Node.js runtime in the renderer. Also,
-within this new window `window.open` follows the native behaviour (by default Electron creates a [`BrowserWindow`](browser-window.md)
+within this new window `window.open` follows the native behavior (by default Electron creates a [`BrowserWindow`](browser-window.md)
 and returns a proxy to this via `window.open`).

-[`app.enableSandbox`](app.md#appenablesandbox-experimental) can be used to force `sandbox: true` for all `BrowserWindow` instances.
+[`app.enableSandbox`](app.md#appenablesandbox) can be used to force `sandbox: true` for all `BrowserWindow` instances.

 ```js
 let win
 app.enableSandbox()
-app.on('ready', () => {
+app.whenReady().then(() => {
  // no need to pass `sandbox: true` since `app.enableSandbox()` was called.
  win = new BrowserWindow()
  win.loadURL('http://google.com')
@@ -73,7 +73,7 @@ Here's an example:

 ```js
 let win
-app.on('ready', () => {
+app.whenReady().then(() => {
  win = new BrowserWindow({
    webPreferences: {
      sandbox: true,
@@ -154,24 +154,43 @@ More may be added as needed to expose more Electron APIs in the sandbox, but any
 module in the main process can already be used through
 `electron.remote.require`.

-## Status
+## Rendering untrusted content

-Please use the `sandbox` option with care, as it is still an experimental
-feature. We are still not aware of the security implications of exposing some
-Electron renderer APIs to the preload script, but here are some things to
-consider before rendering untrusted content:
+Rendering untrusted content in Electron is still somewhat uncharted territory,
+though some apps are finding success (e.g. Beaker Browser). Our goal is to get
+as close to Chrome as we can in terms of the security of sandboxed content, but
+ultimately we will always be behind due to a few fundamental issues:
+
+1. We do not have the dedicated resources or expertise that Chromium has to
+   apply to the security of its product. We do our best to make use of what we
+   have, to inherit everything we can from Chromium, and to respond quickly to
+   security issues, but Electron cannot be as secure as Chromium without the
+   resources that Chromium is able to dedicate.
+2. Some security features in Chrome (such as Safe Browsing and Certificate
+   Transparency) require a centralized authority and dedicated servers, both of
+   which run counter to the goals of the Electron project. As such, we disable
+   those features in Electron, at the cost of the associated security they
+   would otherwise bring.
+3. There is only one Chromium, whereas there are many thousands of apps built
+   on Electron, all of which behave slightly differently. Accounting for those
+   differences can yield a huge possibility space, and make it challenging to
+   ensure the security of the platform in unusual use cases.
+4. We can't push security updates to users directly, so we rely on app vendors
+   to upgrade the version of Electron underlying their app in order for
+   security updates to reach users.
+
+Here are some things to consider before rendering untrusted content:

 - A preload script can accidentally leak privileged APIs to untrusted code,
  unless [`contextIsolation`](../tutorial/security.md#3-enable-context-isolation-for-remote-content)
  is also enabled.
- Some bug in V8 engine may allow malicious code to access the renderer preload
-  APIs, effectively granting full access to the system through the `remote`
-  module. Therefore, it is highly recommended to
-  [disable the `remote` module](../tutorial/security.md#15-disable-the-remote-module).
-  If disabling is not feasible, you should selectively
-  [filter the `remote` module](../tutorial/security.md#16-filter-the-remote-module).
-
-Since rendering untrusted content in Electron is still uncharted territory,
-the APIs exposed to the sandbox preload script should be considered more
-unstable than the rest of Electron APIs, and may have breaking changes to fix
-security issues.
+- Some bug in the V8 engine may allow malicious code to access the renderer
+  preload APIs, effectively granting full access to the system through the
+  `remote` module. Therefore, it is highly recommended to [disable the `remote`
+  module](../tutorial/security.md#15-disable-the-remote-module).
+  If disabling is not feasible, you should selectively [filter the `remote`
+  module](../tutorial/security.md#16-filter-the-remote-module).
+- While we make our best effort to backport Chromium security fixes to older
+  versions of Electron, we do not make a guarantee that every fix will be
+  backported. Your best chance at staying secure is to be on the latest stable
+  version of Electron.
--- a/docs/api/screen.md
+++ b/docs/api/screen.md
@@ -18,7 +18,7 @@ An example of creating a window that fills the whole screen:
 const { app, BrowserWindow, screen } = require('electron')

 let win
-app.on('ready', () => {
+app.whenReady().then(() => {
  const { width, height } = screen.getPrimaryDisplay().workAreaSize
  win = new BrowserWindow({ width, height })
  win.loadURL('https://github.com')
@@ -32,7 +32,7 @@ const { app, BrowserWindow, screen } = require('electron')

 let win

-app.on('ready', () => {
+app.whenReady().then(() => {
  let displays = screen.getAllDisplays()
  let externalDisplay = displays.find((display) => {
    return display.bounds.x !== 0 || display.bounds.y !== 0
--- a/docs/api/service-workers.md
+++ b/docs/api/service-workers.md
@@ -0,0 +1,62 @@
+## Class: ServiceWorkers
+
+> Query and receive events from a sessions active service workers.
+
+Process: [Main](../glossary.md#main-process)
+
+Instances of the `ServiceWorkers` class are accessed by using `serviceWorkers` property of
+a `Session`.
+
+For example:
+
+```javascript
+const { session } = require('electron')
+
+// Get all service workers.
+console.log(session.defaultSession.serviceWorkers.getAllRunning())
+
+// Handle logs and get service worker info
+session.defaultSession.serviceWorkers.on('console-message', (event, messageDetails) => {
+  console.log(
+    'Got service worker message',
+    messageDetails,
+    'from',
+    session.defaultSession.serviceWorkers.getFromVersionID(messageDetails.versionId)
+  )
+})
+```
+
+### Instance Events
+
+The following events are available on instances of `ServiceWorkers`:
+
+#### Event: 'console-message'
+
+Returns:
+
+* `event` Event
+* `messageDetails` Object - Information about the console message
+  * `message` String - The actual console message
+  * `versionId` Number - The version ID of the service worker that sent the log message
+  * `source` String - The type of source for this message.  Can be `javascript`, `xml`, `network`, `console-api`, `storage`, `app-cache`, `rendering`, `security`, `deprecation`, `worker`, `violation`, `intervention`, `recommendation` or `other`.
+  * `level` Number - The log level, from 0 to 3.  In order it matches `verbose`, `info`, `warning` and `error`.
+  * `sourceUrl` String - The URL the message came from
+  * `lineNumber` Number - The line number of the source that triggered this console message
+
+Emitted when a service worker logs something to the console.
+
+### Instance Methods
+
+The following methods are available on instances of `ServiceWorkers`:
+
+#### `serviceWorkers.getAllRunning()`
+
+Returns `Record<Number, ServiceWorkerInfo>` - A [ServiceWorkerInfo](structures/service-worker-info.md) object where the keys are the service worker version ID and the values are the information about that service worker.
+
+#### `serviceWorkers.getFromVersionID(versionId)`
+
+* `versionId` Number
+
+Returns [`ServiceWorkerInfo`](structures/service-worker-info.md) - Information about this service worker
+
+If the service worker does not exist or is not running this method will throw an exception.
--- a/docs/api/session.md
+++ b/docs/api/session.md
@@ -105,6 +105,45 @@ Returns:
 Emitted when a render process requests preconnection to a URL, generally due to
 a [resource hint](https://w3c.github.io/resource-hints/).

+#### Event: 'spellcheck-dictionary-initialized'
+
+Returns:
+
+* `event` Event
+* `languageCode` String - The language code of the dictionary file
+
+Emitted when a hunspell dictionary file has been successfully initialized. This
+occurs after the file has been downloaded.
+
+#### Event: 'spellcheck-dictionary-download-begin'
+
+Returns:
+
+* `event` Event
+* `languageCode` String - The language code of the dictionary file
+
+Emitted when a hunspell dictionary file starts downloading
+
+#### Event: 'spellcheck-dictionary-download-success'
+
+Returns:
+
+* `event` Event
+* `languageCode` String - The language code of the dictionary file
+
+Emitted when a hunspell dictionary file has been successfully downloaded
+
+#### Event: 'spellcheck-dictionary-download-failure'
+
+Returns:
+
+* `event` Event
+* `languageCode` String - The language code of the dictionary file
+
+Emitted when a hunspell dictionary file download fails.  For details
+on the failure you should collect a netlog and inspect the download
+request.
+
 ### Instance Methods

 The following methods are available on instances of `Session`:
@@ -126,9 +165,10 @@ Clears the session’s HTTP cache.
    `scheme://host:port`.
  * `storages` String[] (optional) - The types of storages to clear, can contain:
    `appcache`, `cookies`, `filesystem`, `indexdb`, `localstorage`,
-    `shadercache`, `websql`, `serviceworkers`, `cachestorage`.
+    `shadercache`, `websql`, `serviceworkers`, `cachestorage`. If not
+    specified, clear all storage types.
  * `quotas` String[] (optional) - The types of quotas to clear, can contain:
-    `temporary`, `persistent`, `syncable`.
+    `temporary`, `persistent`, `syncable`. If not specified, clear all quotas.

 Returns `Promise<void>` - resolves when the storage data has been cleared.

@@ -271,6 +311,7 @@ the original network configuration.
  * `request` Object
    * `hostname` String
    * `certificate` [Certificate](structures/certificate.md)
+    * `validatedCertificate` [Certificate](structures/certificate.md)
    * `verificationResult` String - Verification result from chromium.
    * `errorCode` Integer - Error code.
  * `callback` Function
@@ -335,7 +376,7 @@ session.fromPartition('some-partition').setPermissionRequestHandler((webContents

 #### `ses.setPermissionCheckHandler(handler)`

-* `handler` Function<Boolean> | null
+* `handler` Function\<Boolean> | null
  * `webContents` [WebContents](web-contents.md) - WebContents checking the permission.  Please note that if the request comes from a subframe you should use `requestingUrl` to check the request origin.
  * `permission` String - Enum of 'media'.
  * `requestingOrigin` String - The origin URL of the permission check
@@ -398,6 +439,13 @@ example `"en-US,fr,de,ko,zh-CN,ja"`.
 This doesn't affect existing `WebContents`, and each `WebContents` can use
 `webContents.setUserAgent` to override the session-wide user agent.

+#### `ses.isPersistent()`
+
+Returns `Boolean` - Whether or not this session is a persistent one. The default
+`webContents` session of a `BrowserWindow` is persistent. When creating a session
+from a partition, session prefixed with `persist:` will be persistent, while others
+will be temporary.
+
 #### `ses.getUserAgent()`

 Returns `String` - The user agent for this session.
@@ -438,9 +486,7 @@ event. The [DownloadItem](download-item.md) will not have any `WebContents` asso
 the initial state will be `interrupted`. The download will start only when the
 `resume` API is called on the [DownloadItem](download-item.md).

-#### `ses.clearAuthCache(options)`
-
-* `options` ([RemovePassword](structures/remove-password.md) | [RemoveClientCertificate](structures/remove-client-certificate.md))
+#### `ses.clearAuthCache()`

 Returns `Promise<void>` - resolves when the session’s HTTP authentication cache has been cleared.

@@ -456,14 +502,144 @@ this session just before normal `preload` scripts run.
 Returns `String[]` an array of paths to preload scripts that have been
 registered.

+#### `ses.setSpellCheckerLanguages(languages)`
+
+* `languages` String[] - An array of language codes to enable the spellchecker for.
+
+The built in spellchecker does not automatically detect what language a user is typing in.  In order for the
+spell checker to correctly check their words you must call this API with an array of language codes.  You can
+get the list of supported language codes with the `ses.availableSpellCheckerLanguages` property.
+
+**Note:** On macOS the OS spellchecker is used and will detect your language automatically.  This API is a no-op on macOS.
+
+#### `ses.getSpellCheckerLanguages()`
+
+Returns `String[]` - An array of language codes the spellchecker is enabled for.  If this list is empty the spellchecker
+will fallback to using `en-US`.  By default on launch if this setting is an empty list Electron will try to populate this
+setting with the current OS locale.  This setting is persisted across restarts.
+
+**Note:** On macOS the OS spellchecker is used and has it's own list of languages.  This API is a no-op on macOS.
+
+#### `ses.setSpellCheckerDictionaryDownloadURL(url)`
+
+* `url` String - A base URL for Electron to download hunspell dictionaries from.
+
+By default Electron will download hunspell dictionaries from the Chromium CDN.  If you want to override this
+behavior you can use this API to point the dictionary downloader at your own hosted version of the hunspell
+dictionaries.  We publish a `hunspell_dictionaries.zip` file with each release which contains the files you need
+to host here, the file server must be **case insensitive** you must upload each file twice, once with the case it
+has in the ZIP file and once with the filename as all lower case.
+
+If the files present in `hunspell_dictionaries.zip` are available at `https://example.com/dictionaries/language-code.bdic`
+then you should call this api with `ses.setSpellCheckerDictionaryDownloadURL('https://example.com/dictionaries/')`.  Please
+note the trailing slash.  The URL to the dictionaries is formed as `${url}${filename}`.
+
+**Note:** On macOS the OS spellchecker is used and therefore we do not download any dictionary files.  This API is a no-op on macOS.
+
+#### `ses.listWordsInSpellCheckerDictionary()`
+
+Returns `Promise<String[]>` - An array of all words in app's custom dictionary.
+Resolves when the full dictionary is loaded from disk.
+
+#### `ses.addWordToSpellCheckerDictionary(word)`
+
+* `word` String - The word you want to add to the dictionary
+
+Returns `Boolean` - Whether the word was successfully written to the custom dictionary. This API
+will not work on non-persistent (in-memory) sessions.
+
+**Note:** On macOS and Windows 10 this word will be written to the OS custom dictionary as well
+
+#### `ses.removeWordFromSpellCheckerDictionary(word)`
+
+* `word` String - The word you want to remove from the dictionary
+
+Returns `Boolean` - Whether the word was successfully removed from the custom dictionary. This API
+will not work on non-persistent (in-memory) sessions.
+
+**Note:** On macOS and Windows 10 this word will be removed from the OS custom dictionary as well
+
+#### `ses.loadExtension(path)`
+
+* `path` String - Path to a directory containing an unpacked Chrome extension
+
+Returns `Promise<Extension>` - resolves when the extension is loaded.
+
+This method will raise an exception if the extension could not be loaded. If
+there are warnings when installing the extension (e.g. if the extension
+requests an API that Electron does not support) then they will be logged to the
+console.
+
+Note that Electron does not support the full range of Chrome extensions APIs.
+See [Supported Extensions APIs](extensions.md#supported-extensions-apis) for
+more details on what is supported.
+
+Note that in previous versions of Electron, extensions that were loaded would
+be remembered for future runs of the application. This is no longer the case:
+`loadExtension` must be called on every boot of your app if you want the
+extension to be loaded.
+
+```js
+const { app, session } = require('electron')
+const path = require('path')
+
+app.on('ready', async () => {
+  await session.defaultSession.loadExtension(path.join(__dirname, 'react-devtools'))
+  // Note that in order to use the React DevTools extension, you'll need to
+  // download and unzip a copy of the extension.
+})
+```
+
+This API does not support loading packed (.crx) extensions.
+
+**Note:** This API cannot be called before the `ready` event of the `app` module
+is emitted.
+
+**Note:** Loading extensions into in-memory (non-persistent) sessions is not
+supported and will throw an error.
+
+#### `ses.removeExtension(extensionId)`
+
+* `extensionId` String - ID of extension to remove
+
+Unloads an extension.
+
+**Note:** This API cannot be called before the `ready` event of the `app` module
+is emitted.
+
+#### `ses.getExtension(extensionId)`
+
+* `extensionId` String - ID of extension to query
+
+Returns `Extension` | `null` - The loaded extension with the given ID.
+
+**Note:** This API cannot be called before the `ready` event of the `app` module
+is emitted.
+
+#### `ses.getAllExtensions()`
+
+Returns `Extension[]` - A list of all loaded extensions.
+
+**Note:** This API cannot be called before the `ready` event of the `app` module
+is emitted.
+
 ### Instance Properties

 The following properties are available on instances of `Session`:

+#### `ses.availableSpellCheckerLanguages` _Readonly_
+
+A `String[]` array which consists of all the known available spell checker languages.  Providing a language
+code to the `setSpellCheckerLanaguages` API that isn't in this array will result in an error.
+
 #### `ses.cookies` _Readonly_

 A [`Cookies`](cookies.md) object for this session.

+#### `ses.serviceWorkers` _Readonly_
+
+A [`ServiceWorkers`](service-workers.md) object for this session.
+
 #### `ses.webRequest` _Readonly_

 A [`WebRequest`](web-request.md) object for this session.
@@ -476,12 +652,12 @@ A [`Protocol`](protocol.md) object for this session.
 const { app, session } = require('electron')
 const path = require('path')

-app.on('ready', function () {
+app.whenReady().then(() => {
  const protocol = session.fromPartition('some-partition').protocol
-  protocol.registerFileProtocol('atom', function (request, callback) {
-    var url = request.url.substr(7)
+  protocol.registerFileProtocol('atom', (request, callback) => {
+    let url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  }, function (error) {
+  }, (error) => {
    if (error) console.error('Failed to register protocol')
  })
 })
@@ -494,7 +670,7 @@ A [`NetLog`](net-log.md) object for this session.
 ```javascript
 const { app, session } = require('electron')

-app.on('ready', async function () {
+app.whenReady().then(async () => {
  const netLog = session.fromPartition('some-partition').netLog
  netLog.startLogging('/path/to/net-log')
  // After some network events
--- a/docs/api/shell.md
+++ b/docs/api/shell.md
@@ -2,7 +2,7 @@

 > Manage files and URLs using their default applications.

-Process: [Main](../glossary.md#main-process), [Renderer](../glossary.md#renderer-process)
+Process: [Main](../glossary.md#main-process), [Renderer](../glossary.md#renderer-process) (non-sandboxed only)

 The `shell` module provides functions related to desktop integration.

@@ -14,6 +14,8 @@ const { shell } = require('electron')
 shell.openExternal('https://github.com')
 ```

+**Note:** While the `shell` module can be used in the renderer process, it will not function in a sandboxed renderer.
+
 ## Methods

 The `shell` module has the following methods:
@@ -24,11 +26,11 @@ The `shell` module has the following methods:

 Show the given file in a file manager. If possible, select the file.

-### `shell.openItem(fullPath)`
+### `shell.openPath(path)`

-* `fullPath` String
+* `path` String

-Returns `Boolean` - Whether the item was successfully opened.
+Returns `Promise<String>` - Resolves with an string containing the error message corresponding to the failure if a failure occurred, otherwise "".

 Open the given file in the desktop's default manner.

--- a/docs/api/structures/cookie.md
+++ b/docs/api/structures/cookie.md
@@ -12,3 +12,4 @@
 * `expirationDate` Double (optional) - The expiration date of the cookie as
  the number of seconds since the UNIX epoch. Not provided for session
  cookies.
+* `sameSite` String - The [Same Site](https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies#SameSite_cookies) policy applied to this cookie.  Can be `unspecified`, `no_restriction`, `lax` or `strict`.
--- a/docs/api/structures/extension.md
+++ b/docs/api/structures/extension.md
@@ -0,0 +1,8 @@
+# Extension Object
+
+* `id` String
+* `manifest` any - Copy of the [extension's manifest data](https://developer.chrome.com/extensions/manifest).
+* `name` String
+* `path` String - The extension's file path.
+* `version` String
+* `url` String - The extension's `chrome-extension://` URL.
--- a/docs/api/structures/ipc-main-event.md
+++ b/docs/api/structures/ipc-main-event.md
@@ -1,7 +1,10 @@
 # IpcMainEvent Object extends `Event`

+* `processId` Integer - The internal ID of the renderer process that sent this message
 * `frameId` Integer - The ID of the renderer frame that sent this message
 * `returnValue` any - Set this to the value to be returned in a synchronous message
 * `sender` WebContents - Returns the `webContents` that sent the message
+* `ports` MessagePortMain[] - A list of MessagePorts that were transferred with this message
 * `reply` Function - A function that will send an IPC message to the renderer frame that sent the original message that you are currently handling.  You should use this method to "reply" to the sent message in order to guarantee the reply will go to the correct process and frame.
+  * `channel` String
  * `...args` any[]
--- a/docs/api/structures/ipc-main-invoke-event.md
+++ b/docs/api/structures/ipc-main-invoke-event.md
@@ -1,4 +1,5 @@
 # IpcMainInvokeEvent Object extends `Event`

+* `processId` Integer - The internal ID of the renderer process that sent this message
 * `frameId` Integer - The ID of the renderer frame that sent this message
 * `sender` WebContents - Returns the `webContents` that sent the message
--- a/Show More
+++ b/Show More