Bump v12.2.2

chore: cherry-pick 3a5bafa35def from chromium (#31366 )
chore: cherry-pick 6a8a2098f9fa from chromium (#31232 )
2026-04-10 03:01:51 -04:00 · 2021-10-11 10:12:26 -07:00 · 2021-10-11 13:27:42 +02:00 · 2021-10-09 23:23:48 -07:00 · 2021-10-08 03:30:38 -07:00 · 2021-10-04 06:55:29 -07:00
946 changed files with 45165 additions and 12967 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -57,6 +57,16 @@ parameters:
    type: boolean
    default: false

+# Executors
+executors:
+  linux-arm:
+    resource_class: electronjs/linux-arm
+    machine: true
+
+  linux-arm64:
+    resource_class: electronjs/linux-arm64
+    machine: true
+
 # The config expects the following environment variables to be set:
 #  - "SLACK_WEBHOOK" Slack hook URL to send notifications.
 #
@@ -69,7 +79,7 @@ parameters:
 # Build machines configs.
 docker-image: &docker-image
  docker:
-    - image: electron.azurecr.io/build:4cec2c5ab66765caa724e37bae2bffb9b29722a5
+    - image: electron.azurecr.io/build:d818f06a9b1540c7fd38f75ad5a2c493dd6843b6

 machine-linux-medium: &machine-linux-medium
  <<: *docker-image
@@ -107,6 +117,7 @@ env-release-build: &env-release-build
  STRIP_BINARIES: true
  GENERATE_SYMBOLS: true
  CHECK_DIST_MANIFEST: '1'
+  IS_RELEASE: true

 env-headless-testing: &env-headless-testing
  DISPLAY: ':99.0'
@@ -157,10 +168,6 @@ env-mas-apple-silicon: &env-mas-apple-silicon
  TARGET_ARCH: arm64
  USE_PREBUILT_V8_CONTEXT_SNAPSHOT: 1

-# Misc build configuration options.
-env-enable-sccache: &env-enable-sccache
-  USE_SCCACHE: true
-
 env-send-slack-notifications: &env-send-slack-notifications
  NOTIFY_SLACK: true
  
@@ -228,6 +235,25 @@ step-maybe-notify-slack-success: &step-maybe-notify-slack-success
      fi
    when: on_success

+step-maybe-cleanup-arm: &step-maybe-cleanup-arm
+  run:
+    name: Cleanup after testing
+    command: |
+      if  [ "$TARGET_ARCH" == "arm64" ] &&[ "`uname`" == "Darwin" ]; then
+        killall Electron || echo "No Electron processes left running"
+        killall Safari || echo "No Safari processes left running"
+        rm -rf ~/Library/Application\ Support/Electron*
+        rm -rf ~/Library/Application\ Support/electron*
+      elif [ "$TARGET_ARCH" == "arm" ] || [ "$TARGET_ARCH" == "arm64" ]; then
+        XVFB=/usr/bin/Xvfb
+        /sbin/start-stop-daemon --stop --exec $XVFB || echo "Xvfb not running"
+        pkill electron || echo "electron not running"
+        rm -rf ~/.config/Electron*
+        rm -rf ~/.config/electron*
+      fi
+
+    when: always
+
 step-checkout-electron: &step-checkout-electron
  checkout:
    path: src/electron
@@ -256,23 +282,34 @@ step-gclient-sync: &step-gclient-sync
          "$CIRCLE_REPOSITORY_URL"

        ELECTRON_USE_THREE_WAY_MERGE_FOR_PATCHES=1 gclient sync --with_branch_heads --with_tags
-        # Re-export all the patches to check if there were changes.
-        python src/electron/script/export_all_patches.py src/electron/patches/config.json
-        cd src/electron
-        git update-index --refresh || true
-        if ! git diff-index --quiet HEAD --; then
-          # There are changes to the patches. Make a git commit with the updated patches
-          git add patches
-          GIT_COMMITTER_NAME="Electron Bot" GIT_COMMITTER_EMAIL="anonymous@electronjs.org" git commit -m "update patches" --author="Electron Bot <anonymous@electronjs.org>"
-          # Export it
-          mkdir -p ../../patches
-          git format-patch -1 --stdout --keep-subject --no-stat --full-index > ../../patches/update-patches.patch
-          echo
-          echo "======================================================================"
-          echo "There were changes to the patches when applying."
-          echo "Check the CI artifacts for a patch you can apply to fix it."
-          echo "======================================================================"
-          exit 1
+        if [ "$IS_RELEASE" != "true" ]; then
+          # Re-export all the patches to check if there were changes.
+          python src/electron/script/export_all_patches.py src/electron/patches/config.json
+          cd src/electron
+          git update-index --refresh || true
+          if ! git diff-index --quiet HEAD --; then
+            # There are changes to the patches. Make a git commit with the updated patches
+            git add patches
+            GIT_COMMITTER_NAME="PatchUp" GIT_COMMITTER_EMAIL="73610968+patchup[bot]@users.noreply.github.com" git commit -m "chore: update patches" --author="PatchUp <73610968+patchup[bot]@users.noreply.github.com>"
+            # Export it
+            mkdir -p ../../patches
+            git format-patch -1 --stdout --keep-subject --no-stat --full-index > ../../patches/update-patches.patch
+            if (node ./script/push-patch.js 2> /dev/null > /dev/null); then
+              echo
+              echo "======================================================================"
+              echo "Changes to the patches when applying, we have auto-pushed the diff to the current branch"
+              echo "A new CI job will kick off shortly"
+              echo "======================================================================"
+              exit 1
+            else
+              echo
+              echo "======================================================================"
+              echo "There were changes to the patches when applying."
+              echo "Check the CI artifacts for a patch you can apply to fix it."
+              echo "======================================================================"
+              exit 1
+            fi
+          fi
        fi
      fi

@@ -283,26 +320,14 @@ step-setup-env-for-build: &step-setup-env-for-build
      # To find `gn` executable.
      echo 'export CHROMIUM_BUILDTOOLS_PATH="'"$PWD"'/src/buildtools"' >> $BASH_ENV

-      if [ "$USE_SCCACHE" == "true" ]; then
-        # https://github.com/mozilla/sccache
-        SCCACHE_PATH="$PWD/src/electron/external_binaries/sccache"
-        echo 'export SCCACHE_PATH="'"$SCCACHE_PATH"'"' >> $BASH_ENV
-        if [ "$CIRCLE_PR_NUMBER" != "" ]; then
-          #if building a fork set readonly access to sccache
-          echo 'export SCCACHE_BUCKET="electronjs-sccache-ci"' >> $BASH_ENV
-          echo 'export SCCACHE_TWO_TIER=true' >> $BASH_ENV
-        fi
-      fi
-
 step-setup-goma-for-build: &step-setup-goma-for-build
  run:
    name: Setup Goma
    command: |
-      echo 'export USE_GOMA=true' >> $BASH_ENV
-      if [ "`uname`" == "Linux" ]; then
-        echo 'export NUMBER_OF_NINJA_PROCESSES=300' >> $BASH_ENV
-      else
-        echo 'export NUMBER_OF_NINJA_PROCESSES=25' >> $BASH_ENV
+      echo 'export NUMBER_OF_NINJA_PROCESSES=300' >> $BASH_ENV
+      if [ "`uname`" == "Darwin" ]; then
+        echo 'ulimit -n 10000' >> $BASH_ENV
+        echo 'sudo launchctl limit maxfiles 65536 200000' >> $BASH_ENV
      fi
      if [ ! -z "$RAW_GOMA_AUTH" ]; then
        echo $RAW_GOMA_AUTH > ~/.goma_oauth2_config
@@ -311,24 +336,28 @@ step-setup-goma-for-build: &step-setup-goma-for-build
      cd build-tools
      npm install
      mkdir third_party
-      node -e "require('./src/utils/goma.js').downloadAndPrepare()"
-      node -e "require('./src/utils/goma.js').ensure()"
+      node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
+      export GOMA_FALLBACK_ON_AUTH_FAILURE=true
+      third_party/goma/goma_ctl.py ensure_start
      echo 'export GN_GOMA_FILE='`node -e "console.log(require('./src/utils/goma.js').gnFilePath)"` >> $BASH_ENV
      echo 'export LOCAL_GOMA_DIR='`node -e "console.log(require('./src/utils/goma.js').dir)"` >> $BASH_ENV
+      echo 'export GOMA_FALLBACK_ON_AUTH_FAILURE=true' >> $BASH_ENV
      cd ..

 step-restore-brew-cache: &step-restore-brew-cache
  restore_cache:
    paths:
-      - /usr/local/Homebrew
+      - /usr/local/Cellar/gnu-tar
+      - /usr/local/bin/gtar
    keys:
-      - v2-brew-cache-{{ arch }}
+      - v4-brew-cache-{{ arch }}

 step-save-brew-cache: &step-save-brew-cache
  save_cache:
    paths:
-      - /usr/local/Homebrew
-    key: v2-brew-cache-{{ arch }}
+      - /usr/local/Cellar/gnu-tar
+      - /usr/local/bin/gtar
+    key: v4-brew-cache-{{ arch }}
    name: Persisting brew cache

 step-get-more-space-on-mac: &step-get-more-space-on-mac
@@ -449,9 +478,6 @@ step-fix-sync-on-mac: &step-fix-sync-on-mac
        # Fix Clang Install (wrong binary)
        rm -rf src/third_party/llvm-build
        python src/tools/clang/scripts/update.py
-        # Fix Framework Header Installs (symlinks not retained)
-        rm -rf src/electron/external_binaries
-        python src/electron/script/update-external-binaries.py
      fi

 step-install-signing-cert-on-mac: &step-install-signing-cert-on-mac
@@ -468,8 +494,10 @@ step-install-gnutar-on-mac: &step-install-gnutar-on-mac
    name: Install gnu-tar on macos
    command: |
      if [ "`uname`" == "Darwin" ]; then
-        brew update
-        brew install gnu-tar
+        if [ ! -d /usr/local/Cellar/gnu-tar/ ]; then
+          brew update
+          brew install gnu-tar
+        fi
        ln -fs /usr/local/bin/gtar /usr/local/bin/tar
      fi

@@ -478,11 +506,7 @@ step-gn-gen-default: &step-gn-gen-default
    name: Default GN gen
    command: |
      cd src
-      if [ "$USE_GOMA" == "true" ]; then
-        gn gen out/Default --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-      else
-        gn gen out/Default --args="import(\"$GN_CONFIG\") cc_wrapper=\"$SCCACHE_PATH\" $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-      fi
+      gn gen out/Default --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"

 step-gn-check: &step-gn-check
  run:
@@ -491,7 +515,6 @@ step-gn-check: &step-gn-check
      cd src
      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
      # Check the hunspell filenames
      node electron/script/gen-hunspell-filenames.js --check
@@ -520,14 +543,11 @@ step-electron-build: &step-electron-build
        ninja -C out/Default electron:electron_mksnapshot_zip -j $NUMBER_OF_NINJA_PROCESSES
        ninja -C out/Default tools/v8_context_snapshot -j $NUMBER_OF_NINJA_PROCESSES
        gn desc out/Default v8:run_mksnapshot_default args > out/Default/mksnapshot_args
+        (cd out/Default; zip mksnapshot.zip mksnapshot_args clang_x64_v8_arm64/gen/v8/embedded.S)
        rm -rf out/Default/clang_x64_v8_arm64/obj

-        # Regenerate because we just deleted some ninja files
-        if [ "$USE_GOMA" == "true" ]; then
-          gn gen out/Default --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-        else
-          gn gen out/Default --args="import(\"$GN_CONFIG\") cc_wrapper=\"$SCCACHE_PATH\" $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-        fi
+        # Regenerate because we just deleted some ninja files 
+        gn gen out/Default --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
      fi
      ninja -C out/Default electron -j $NUMBER_OF_NINJA_PROCESSES
      node electron/script/check-symlinks.js
@@ -572,6 +592,9 @@ step-electron-dist-build: &step-electron-dist-build
            if [ x"$MAS_BUILD" == x"true" ]; then
              target_os=mac_mas
            fi
+            if [ "$TARGET_ARCH" == "arm64" ]; then
+              target_cpu=arm64
+            fi
          elif [ "`uname`" == "Linux" ]; then
            target_os=linux
            if [ x"$TARGET_ARCH" == x ]; then
@@ -600,11 +623,7 @@ step-electron-maybe-chromedriver-gn-gen: &step-electron-maybe-chromedriver-gn-ge
    command: |
      cd src
      if [ "$TARGET_ARCH" == "arm" ] || [ "$TARGET_ARCH" == "arm64" ]; then
-        if [ "$USE_GOMA" == "true" ]; then
-          gn gen out/chromedriver --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") is_component_ffmpeg=false proprietary_codecs=false $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-        else
-          gn gen out/chromedriver --args="import(\"$GN_CONFIG\") cc_wrapper=\"$SCCACHE_PATH\" is_component_ffmpeg=false proprietary_codecs=false $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
-        fi
+        gn gen out/chromedriver --args="import(\"$GN_CONFIG\") import(\"$GN_GOMA_FILE\") is_component_ffmpeg=false proprietary_codecs=false $GN_EXTRA_ARGS $GN_BUILDFLAG_ARGS"
      fi

 step-electron-chromedriver-build: &step-electron-chromedriver-build
@@ -659,10 +678,10 @@ step-electron-publish: &step-electron-publish
      cd src/electron
      if [ "$UPLOAD_TO_S3" == "1" ]; then
        echo 'Uploading Electron release distribution to S3'
-        script/release/uploaders/upload.py --upload_to_s3
+        script/release/uploaders/upload.py --verbose --upload_to_s3
      else
        echo 'Uploading Electron release distribution to Github releases'
-        script/release/uploaders/upload.py
+        script/release/uploaders/upload.py --verbose
      fi

 step-persist-data-for-tests: &step-persist-data-for-tests
@@ -679,6 +698,7 @@ step-persist-data-for-tests: &step-persist-data-for-tests
      - src/electron
      - src/third_party/electron_node
      - src/third_party/nan
+      - src/cross-arch-snapshots

 step-electron-dist-unzip: &step-electron-dist-unzip
  run:
@@ -715,11 +735,7 @@ step-ffmpeg-gn-gen: &step-ffmpeg-gn-gen
    name: ffmpeg GN gen
    command: |
      cd src
-      if [ "$USE_GOMA" == "true" ]; then
-        gn gen out/ffmpeg --args="import(\"//electron/build/args/ffmpeg.gn\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS"
-      else
-        gn gen out/ffmpeg --args="import(\"//electron/build/args/ffmpeg.gn\") cc_wrapper=\"$SCCACHE_PATH\" $GN_EXTRA_ARGS"
-      fi
+      gn gen out/ffmpeg --args="import(\"//electron/build/args/ffmpeg.gn\") import(\"$GN_GOMA_FILE\") $GN_EXTRA_ARGS"

 step-ffmpeg-build: &step-ffmpeg-build
  run:
@@ -745,7 +761,11 @@ step-verify-mksnapshot: &step-verify-mksnapshot
    name: Verify mksnapshot
    command: |
      cd src
-      python electron/script/verify-mksnapshot.py --source-root "$PWD" --build-dir out/Default
+      if [ "$TARGET_ARCH" == "arm" ] || [ "$TARGET_ARCH" == "arm64" ]; then
+        python electron/script/verify-mksnapshot.py --source-root "$PWD" --build-dir out/Default --snapshot-files-dir $PWD/cross-arch-snapshots
+      else
+        python electron/script/verify-mksnapshot.py --source-root "$PWD" --build-dir out/Default
+      fi

 step-verify-chromedriver: &step-verify-chromedriver
  run:
@@ -762,21 +782,16 @@ step-setup-linux-for-headless-testing: &step-setup-linux-for-headless-testing
        sh -e /etc/init.d/xvfb start
      fi

-step-show-sccache-stats: &step-show-sccache-stats
+step-show-goma-stats: &step-show-goma-stats
  run:
    shell: /bin/bash
-    name: Check sccache/goma stats after build
-    command: |
-      if [ "$SCCACHE_PATH" != "" ]; then
-        $SCCACHE_PATH -s
-      fi
-      if [ "$USE_GOMA" == "true" ]; then
-        set +e
-        set +o pipefail
-        $LOCAL_GOMA_DIR/goma_ctl.py stat
-        $LOCAL_GOMA_DIR/diagnose_goma_log.py
-        true
-      fi
+    name: Check goma stats after build
+    command: |      
+      set +e
+      set +o pipefail
+      $LOCAL_GOMA_DIR/goma_ctl.py stat
+      $LOCAL_GOMA_DIR/diagnose_goma_log.py
+      true
    when: always

 step-mksnapshot-build: &step-mksnapshot-build
@@ -877,23 +892,6 @@ step-maybe-cross-arch-snapshot-store: &step-maybe-cross-arch-snapshot-store
    path: src/cross-arch-snapshots
    destination: cross-arch-snapshots

-step-maybe-trigger-arm-test: &step-maybe-trigger-arm-test
-  run:
-    name: Trigger an arm test on VSTS if applicable
-    command: |
-      cd src
-      # Only run for non-fork prs
-      if [ "$TRIGGER_ARM_TEST" == "true" ] && [ -z "$CIRCLE_PR_NUMBER" ]; then
-        #Trigger VSTS job, passing along CircleCI job number and branch to build
-        if [ "`uname`" == "Darwin" ]; then
-          echo "Triggering electron-arm2-testing build on Azure DevOps"  
-          node electron/script/release/ci-release-build.js --job=electron-arm2-testing --ci=DevOps --armTest --circleBuildNum=$CIRCLE_BUILD_NUM $CIRCLE_BRANCH
-        else
-          echo "Triggering electron-$TARGET_ARCH-testing build on VSTS"  
-          node electron/script/release/ci-release-build.js --job=electron-$TARGET_ARCH-testing --ci=VSTS --armTest --circleBuildNum=$CIRCLE_BUILD_NUM $CIRCLE_BRANCH
-        fi
-      fi
-
 step-maybe-generate-typescript-defs: &step-maybe-generate-typescript-defs
  run:
    name: Generate type declarations
@@ -915,6 +913,8 @@ step-ninja-summary: &step-ninja-summary
  run:
    name: Print ninja summary
    command: |
+      set +e
+      set +o pipefail
      python depot_tools/post_build_ninja_summary.py -C src/out/Default

 step-ninja-report: &step-ninja-report
@@ -1183,6 +1183,7 @@ steps-electron-gn-check: &steps-electron-gn-check
    - *step-maybe-early-exit-doc-only-change
    - *step-depot-tools-add-to-path
    - *step-setup-env-for-build
+    - *step-setup-goma-for-build
    - *step-gn-gen-default
    - *step-gn-check

@@ -1216,7 +1217,7 @@ steps-electron-ts-compile-for-doc-change: &steps-electron-ts-compile-for-doc-cha

    - *step-depot-tools-add-to-path
    - *step-setup-env-for-build
-    - *step-restore-brew-cache
+    - *step-setup-goma-for-build
    - *step-get-more-space-on-mac
    - *step-install-npm-deps-on-mac
    - *step-fix-sync-on-mac
@@ -1225,26 +1226,13 @@ steps-electron-ts-compile-for-doc-change: &steps-electron-ts-compile-for-doc-cha
    #Compile ts/js to verify doc change didn't break anything
    - *step-ts-compile

-steps-chromedriver-build: &steps-chromedriver-build
-  steps:
-    - attach_workspace:
-        at: .
-    - *step-depot-tools-add-to-path
-    - *step-setup-env-for-build
-    - *step-fix-sync-on-mac
-
-    - *step-electron-maybe-chromedriver-gn-gen
-    - *step-electron-chromedriver-build
-    - *step-electron-chromedriver-store
-
-    - *step-maybe-notify-slack-failure
-
 steps-native-tests: &steps-native-tests
  steps:
    - attach_workspace:
        at: .
    - *step-depot-tools-add-to-path
    - *step-setup-env-for-build
+    - *step-setup-goma-for-build
    - *step-gn-gen-default

    - run:
@@ -1252,7 +1240,7 @@ steps-native-tests: &steps-native-tests
        command: |
          cd src
          ninja -C out/Default $BUILD_TARGET
-    - *step-show-sccache-stats
+    - *step-show-goma-stats

    - *step-setup-linux-for-headless-testing
    - run:
@@ -1318,8 +1306,14 @@ steps-tests: &steps-tests
          ELECTRON_DISABLE_SECURITY_WARNINGS: 1
        command: |
          cd src
-          (cd electron && node script/yarn test --runners=main --trace-uncaught --enable-logging --files $(circleci tests glob spec-main/*-spec.ts | circleci tests split))
-          (cd electron && node script/yarn test --runners=remote --trace-uncaught --enable-logging --files $(circleci tests glob spec/*-spec.js | circleci tests split))
+          if [ "$TARGET_ARCH" == "arm" ] || [ "$TARGET_ARCH" == "arm64" ]; then
+            export ELECTRON_SKIP_NATIVE_MODULE_TESTS=true
+            (cd electron && node script/yarn test --runners=main --trace-uncaught --enable-logging)
+            (cd electron && node script/yarn test --runners=remote --trace-uncaught --enable-logging)
+          else
+            (cd electron && node script/yarn test --runners=main --trace-uncaught --enable-logging --files $(circleci tests glob spec-main/*-spec.ts | circleci tests split))
+            (cd electron && node script/yarn test --runners=remote --trace-uncaught --enable-logging --files $(circleci tests glob spec/*-spec.js | circleci tests split))
+          fi
    - run:
        name: Check test results existence
        command: |
@@ -1340,6 +1334,8 @@ steps-tests: &steps-tests

    - *step-maybe-notify-slack-failure

+    - *step-maybe-cleanup-arm
+
 steps-test-nan: &steps-test-nan
  steps:
    - attach_workspace:
@@ -1557,7 +1553,7 @@ commands:
            - *step-nodejs-headers-build
            - *step-nodejs-headers-store

-            - *step-show-sccache-stats
+            - *step-show-goma-stats

            # mksnapshot
            - *step-mksnapshot-build
@@ -1612,9 +1608,6 @@ commands:
                steps:
                  - *step-save-out-cache

-            # Trigger tests on arm hardware if needed
-            - *step-maybe-trigger-arm-test
-
            - *step-maybe-notify-slack-failure

  electron-publish:
@@ -1645,13 +1638,14 @@ commands:
            - *step-gclient-sync
            - *step-delete-git-directories
            - *step-minimize-workspace-size-from-checkout
-      - *step-fix-sync-on-mac            
+      - *step-fix-sync-on-mac
      - *step-setup-env-for-build
+      - *step-setup-goma-for-build
      - *step-gn-gen-default

      # Electron app
      - *step-electron-build
-      - *step-show-sccache-stats
+      - *step-show-goma-stats
      - *step-maybe-generate-breakpad-symbols
      - *step-maybe-electron-dist-strip
      - *step-electron-dist-build
@@ -1835,14 +1829,6 @@ jobs:
      <<: *env-testing-build
    <<: *steps-electron-gn-check

-  linux-x64-chromedriver:
-    <<: *machine-linux-medium
-    environment:
-      <<: *env-linux-medium
-      <<: *env-release-build
-      <<: *env-send-slack-notifications
-    <<: *steps-chromedriver-build
-
  linux-x64-release:
    <<: *machine-linux-2xlarge
    environment:
@@ -1862,8 +1848,8 @@ jobs:
      <<: *env-linux-2xlarge-release
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -1874,8 +1860,8 @@ jobs:
    environment:
      <<: *env-linux-2xlarge-release
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -1895,15 +1881,6 @@ jobs:
          checkout: true
          use-out-cache: false

-  linux-ia32-chromedriver:
-    <<: *machine-linux-medium
-    environment:
-      <<: *env-linux-medium
-      <<: *env-ia32
-      <<: *env-release-build
-      <<: *env-send-slack-notifications
-    <<: *steps-chromedriver-build
-
  linux-ia32-release:
    <<: *machine-linux-2xlarge
    environment:
@@ -1925,9 +1902,9 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      <<: *env-ia32
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -1939,9 +1916,9 @@ jobs:
      <<: *env-linux-2xlarge-release
      <<: *env-ia32
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -1958,19 +1935,10 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_arm64=True'
    steps:
      - electron-build:
-          persist: false
+          persist: true
          checkout: true
          use-out-cache: false

-  linux-arm-chromedriver:
-    <<: *machine-linux-medium
-    environment:
-      <<: *env-linux-medium
-      <<: *env-arm
-      <<: *env-release-build
-      <<: *env-send-slack-notifications
-    <<: *steps-chromedriver-build
-
  linux-arm-release:
    <<: *machine-linux-2xlarge
    environment:
@@ -1991,10 +1959,10 @@ jobs:
      <<: *env-linux-2xlarge-release
      <<: *env-arm
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-32bit-release
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2006,9 +1974,9 @@ jobs:
      <<: *env-linux-2xlarge-release
      <<: *env-arm
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -2025,7 +1993,7 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_arm64=True'
    steps:
      - electron-build:
-          persist: false
+          persist: true
          checkout: true
          use-out-cache: false

@@ -2037,15 +2005,6 @@ jobs:
      <<: *env-testing-build
    <<: *steps-electron-gn-check

-  linux-arm64-chromedriver:
-    <<: *machine-linux-medium
-    environment:
-      <<: *env-linux-medium
-      <<: *env-arm64
-      <<: *env-release-build
-      <<: *env-send-slack-notifications
-    <<: *steps-chromedriver-build
-
  linux-arm64-release:
    <<: *machine-linux-2xlarge
    environment:
@@ -2066,9 +2025,9 @@ jobs:
      <<: *env-linux-2xlarge-release
      <<: *env-arm64
      <<: *env-release-build
-      <<: *env-enable-sccache
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm64=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2080,8 +2039,8 @@ jobs:
      <<: *env-linux-2xlarge-release
      <<: *env-arm64
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -2128,9 +2087,9 @@ jobs:
    environment:
      <<: *env-mac-large-release
      <<: *env-release-build
-      <<: *env-enable-sccache
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2141,10 +2100,10 @@ jobs:
    environment:
      <<: *env-mac-large-release
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-apple-silicon
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2155,8 +2114,8 @@ jobs:
    environment:
      <<: *env-mac-large-release
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -2167,9 +2126,9 @@ jobs:
    environment:
      <<: *env-mac-large-release
      <<: *env-release-build
-      <<: *env-enable-sccache
      <<: *env-apple-silicon
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -2236,9 +2195,9 @@ jobs:
      <<: *env-mac-large-release
      <<: *env-mas
      <<: *env-release-build
-      <<: *env-enable-sccache
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2250,9 +2209,9 @@ jobs:
      <<: *env-mac-large-release
      <<: *env-mas-apple-silicon
      <<: *env-release-build
-      <<: *env-enable-sccache
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: false
@@ -2264,7 +2223,6 @@ jobs:
      <<: *env-mac-large-release
      <<: *env-mas
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
      - electron-publish:
@@ -2277,8 +2235,8 @@ jobs:
      <<: *env-mac-large-release
      <<: *env-mas-apple-silicon
      <<: *env-release-build
-      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+      <<: *env-ninja-status
    steps:
      - electron-publish:
          attach: true
@@ -2423,6 +2381,24 @@ jobs:
      <<: *env-send-slack-notifications
    <<: *steps-verify-ffmpeg

+  linux-arm-testing-tests:
+    executor: linux-arm
+    environment:
+      <<: *env-arm
+      <<: *env-global
+      <<: *env-headless-testing
+      <<: *env-stack-dumping
+    <<: *steps-tests
+
+  linux-arm64-testing-tests:
+    executor: linux-arm64
+    environment:
+      <<: *env-arm64
+      <<: *env-global
+      <<: *env-headless-testing
+      <<: *env-stack-dumping
+    <<: *steps-tests
+
  osx-testing-x64-tests:
    <<: *machine-mac-large
    environment:
@@ -2603,15 +2579,19 @@ workflows:
    - osx-publish-x64-skip-checkout:
        requires:
          - mac-checkout
+        context: release-env
    - mas-publish-x64-skip-checkout:
        requires:
          - mac-checkout
+        context: release-env
    - osx-publish-arm64-skip-checkout:
        requires:
          - mac-checkout
+        context: release-env
    - mas-publish-arm64-skip-checkout:
        requires:
          - mac-checkout
+        context: release-env

  lint:
    when: << pipeline.parameters.run-lint >>
@@ -2651,8 +2631,23 @@ workflows:
            - linux-ia32-testing

      - linux-arm-testing
+      - linux-arm-testing-tests:
+          filters:
+            branches:
+              # Do not run this on forked pull requests
+              ignore: /pull\/[0-9]+/        
+          requires:
+            - linux-arm-testing      

      - linux-arm64-testing
+      - linux-arm64-testing-tests:
+          filters:
+            branches:
+              # Do not run this on forked pull requests
+              ignore: /pull\/[0-9]+/        
+          requires:
+            - linux-arm64-testing
+
      - linux-arm64-testing-gn-check:
          requires:
            - linux-checkout-fast
--- a/.env.example
+++ b/.env.example
@@ -4,4 +4,3 @@
 APPVEYOR_CLOUD_TOKEN=
 CIRCLE_TOKEN=
 ELECTRON_GITHUB_TOKEN=
-VSTS_TOKEN=
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -8,45 +8,45 @@
  "rules": {
    "semi": ["error", "always"],
    "no-var": "error",
-    "no-unused-vars": 0,
-    "no-global-assign": 0,
-    "guard-for-in": 2,
+    "no-unused-vars": "off",
+    "no-global-assign": "off",
+    "guard-for-in": "error",
    "@typescript-eslint/no-unused-vars": ["error", {
      "vars": "all",
      "args": "after-used",
-      "ignoreRestSiblings": false
+      "ignoreRestSiblings": true
    }],
    "prefer-const": ["error", {
      "destructuring": "all"
    }],
    "standard/no-callback-literal": "off",
-    "node/no-deprecated-api": 0
+    "node/no-deprecated-api": "off"
  },
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module"
  },
-  "globals": {
-    "standardScheme": "readonly",
-    "globalThis": "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"
+        "@typescript-eslint/no-unused-vars": "off"
+      }
+    },
+    {
+      "files": "*.ts",
+      "rules": {
+        "no-undef": "off",
+        "no-redeclare": "off",
+        "@typescript-eslint/no-redeclare": ["error"],
+        "no-use-before-define": "off"
      }
    },
    {
      "files": "*.d.ts",
      "rules": {
-          "no-useless-constructor": "off",
-          "@typescript-eslint/no-unused-vars": "off"
+        "no-useless-constructor": "off",
+        "@typescript-eslint/no-unused-vars": "off"
      }
    }
  ]
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -13,7 +13,6 @@ Contributors guide: https://github.com/electron/electron/blob/master/CONTRIBUTIN
 - [ ] `npm test` passes
 - [ ] tests are [changed or added](https://github.com/electron/electron/blob/master/docs/development/testing.md)
 - [ ] relevant documentation is changed or added
- [ ] PR title follows semantic [commit guidelines](https://github.com/electron/electron/blob/master/docs/development/pull-requests.md#commit-message-guidelines)
 - [ ] [PR release notes](https://github.com/electron/clerk/blob/master/README.md) describe the change in a way relevant to app developers, and are [capitalized, punctuated, and past tense](https://github.com/electron/clerk/blob/master/README.md#examples).

 #### Release Notes
--- a/.gitignore
+++ b/.gitignore
@@ -65,4 +65,9 @@ ts-gen

 # Used to accelerate CI builds
 .depshash
-.depshash-target
+.depshash-target
+
+# Used to accelerate builds after sync
+patches/mtime-cache.json
+
+spec/fixtures/logo.png
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -184,7 +184,6 @@ target_gen_default_app_js = "$target_gen_dir/js/default_app"

 typescript_build("default_app_js") {
  deps = [ ":build_electron_definitions" ]
-  type_root = rebase_path("$target_gen_dir/tsc/electron/typings")

  sources = filenames.default_app_ts_sources

@@ -266,21 +265,6 @@ if (is_linux) {
  }
 }

-source_set("manifests") {
-  sources = [
-    "//electron/shell/app/manifests.cc",
-    "//electron/shell/app/manifests.h",
-  ]
-
-  include_dirs = [ "//electron" ]
-
-  deps = [
-    "//electron/shell/common/api:mojo",
-    "//printing/buildflags",
-    "//services/service_manager/public/cpp",
-  ]
-}
-
 npm_action("electron_version_args") {
  script = "generate-version-json"

@@ -303,6 +287,19 @@ templated_file("electron_version_header") {
  args_files = get_target_outputs(":electron_version_args")
 }

+action("electron_fuses") {
+  script = "build/fuses/build.py"
+
+  inputs = [ "build/fuses/fuses.json" ]
+
+  outputs = [
+    "$target_gen_dir/fuses.h",
+    "$target_gen_dir/fuses.cc",
+  ]
+
+  args = rebase_path(outputs)
+}
+
 source_set("electron_lib") {
  configs += [ "//v8:external_startup_data" ]
  configs += [ "//third_party/electron_node:node_internals" ]
@@ -313,9 +310,9 @@ source_set("electron_lib") {
  ]

  deps = [
+    ":electron_fuses",
    ":electron_js2c",
    ":electron_version_header",
-    ":manifests",
    ":resources",
    "buildflags",
    "chromium_src:chrome",
@@ -325,7 +322,6 @@ source_set("electron_lib") {
    "//base/allocator:buildflags",
    "//chrome/app:command_ids",
    "//chrome/app/resources:platform_locale_settings",
-    "//chrome/services/printing/public/mojom",
    "//components/certificate_transparency",
    "//components/language/core/browser",
    "//components/net_log",
@@ -341,7 +337,6 @@ source_set("electron_lib") {
    "//components/viz/service",
    "//content/public/browser",
    "//content/public/child",
-    "//content/public/common:service_names",
    "//content/public/gpu",
    "//content/public/renderer",
    "//content/public/utility",
@@ -372,6 +367,7 @@ source_set("electron_lib") {
    "//third_party/libyuv",
    "//third_party/webrtc_overrides:webrtc_component",
    "//third_party/widevine/cdm:headers",
+    "//third_party/zlib/google:zip",
    "//ui/base/idle",
    "//ui/events:dom_keycode_converter",
    "//ui/gl",
@@ -495,6 +491,7 @@ source_set("electron_lib") {
    }
  }
  if (is_linux) {
+    libs = [ "xshmfence" ]
    deps += [
      ":libnotify_loader",
      "//build/config/linux/gtk",
@@ -507,15 +504,13 @@ source_set("electron_lib") {
      "//ui/wm",
    ]
    if (use_x11) {
+      sources += filenames.lib_sources_linux_x11
      deps += [
        "//ui/gfx/x",
        "//ui/gtk/x",
      ]
    }
    configs += [ ":gio_unix" ]
-    if (use_x11) {
-      deps += [ "//ui/gfx/x" ]
-    }
    defines += [
      # Disable warnings for g_settings_list_schemas.
      "GLIB_DISABLE_DEPRECATION_WARNINGS",
@@ -620,7 +615,10 @@ source_set("electron_lib") {
      "shell/renderer/printing/print_render_frame_helper_delegate.cc",
      "shell/renderer/printing/print_render_frame_helper_delegate.h",
    ]
-    deps += [ "//components/printing/common:mojo_interfaces" ]
+    deps += [
+      "//chrome/services/printing/public/mojom",
+      "//components/printing/common:mojo_interfaces",
+    ]
  }

  if (enable_electron_extensions) {
@@ -650,6 +648,7 @@ source_set("electron_lib") {
  }
  if (enable_pdf_viewer) {
    deps += [
+      "//chrome/browser/resources/pdf:pdf_resources",
      "//components/pdf/browser",
      "//components/pdf/renderer",
      "//pdf:pdf_ppapi",
@@ -659,6 +658,16 @@ source_set("electron_lib") {
      "shell/browser/electron_pdf_web_contents_helper_client.h",
    ]
  }
+
+  sources += get_target_outputs(":electron_fuses")
+
+  if (is_win && enable_win_dark_mode_window_ui) {
+    sources += [
+      "shell/browser/win/dark_mode.cc",
+      "shell/browser/win/dark_mode.h",
+    ]
+    libs += [ "uxtheme.lib" ]
+  }
 }

 electron_paks("packed_resources") {
@@ -684,10 +693,10 @@ if (is_mac) {
  action("fake_v8_context_snapshot_generator") {
    script = "build/fake_v8_context_snapshot_generator.py"
    args = [
-      rebase_path("$root_out_dir/v8_context_snapshot.bin"),
-      rebase_path("$root_out_dir/fake/v8_context_snapshot.bin"),
+      rebase_path("$root_out_dir/$v8_context_snapshot_filename"),
+      rebase_path("$root_out_dir/fake/$v8_context_snapshot_filename"),
    ]
-    outputs = [ "$root_out_dir/fake/v8_context_snapshot.bin" ]
+    outputs = [ "$root_out_dir/fake/$v8_context_snapshot_filename" ]
  }

  bundle_data("electron_framework_resources") {
@@ -701,10 +710,10 @@ if (is_mac) {
      public_deps += [ "//v8" ]
      if (use_v8_context_snapshot) {
        if (use_prebuilt_v8_context_snapshot) {
-          sources += [ "$root_out_dir/fake/v8_context_snapshot.bin" ]
+          sources += [ "$root_out_dir/fake/$v8_context_snapshot_filename" ]
          public_deps += [ ":fake_v8_context_snapshot_generator" ]
        } else {
-          sources += [ "$root_out_dir/v8_context_snapshot.bin" ]
+          sources += [ "$root_out_dir/$v8_context_snapshot_filename" ]
          public_deps += [ "//tools/v8_context_snapshot" ]
        }
      } else {
@@ -983,6 +992,9 @@ if (is_mac) {
    deps = [
      ":electron_app_framework_bundle_data",
      ":electron_app_resources",
+      ":electron_fuses",
+      "//base",
+      "//electron/buildflags",
    ]
    if (is_mas_build) {
      deps += [ ":electron_login_helper_app" ]
@@ -1146,6 +1158,19 @@ if (is_mac) {
        ldflags += [ "/guard:cf,nolongjmp" ]
      }

+      if (current_cpu == "x86") {
+        # Set the initial stack size to 0.5MiB, instead of the 1.5MiB needed by
+        # Chrome's main thread. This saves significant memory on threads (like
+        # those in the Windows thread pool, and others) whose stack size we can
+        # only control through this setting. Because Chrome's main thread needs
+        # a minimum 1.5 MiB stack, the main thread (in 32-bit builds only) uses
+        # fibers to switch to a 1.5 MiB stack before running any other code.
+        ldflags += [ "/STACK:0x80000" ]
+      } else {
+        # Increase the initial stack size. The default is 1MB, this is 8MB.
+        ldflags += [ "/STACK:0x800000" ]
+      }
+
      # This is to support renaming of electron.exe. node-gyp has hard-coded
      # executable names which it will recognise as node. This module definition
      # file claims that the electron executable is in fact named "node.exe",
--- a/40
+++ b/40
@@ -14,13 +14,13 @@ gclient_gn_args = [

 vars = {
  'chromium_version':
-    '9269f9eb1d98d29564c2b2ab97f30c6e148c4e11',
+    '89.0.4389.128',
  'node_version':
-    'v14.13.1',
+    'v14.16.0',
  'nan_version':
    '2c4ee8a32a299eada3cd6e468bbd0a473bfea96d',
  'squirrel.mac_version':
-    'a3a5b3f03b824441c014893b18f99a103b2603e9',
+    'cdc0729c8bf8576bfef18629186e1e9ecf1b0d9f',

  'pyyaml_version': '3.12',
  'requests_version': 'e4d59bedfd3c7f4f254f4f5d036587bcd8152458',
@@ -38,6 +38,9 @@ vars = {
  # To be able to build clean Chromium from sources.
  'apply_patches': True,

+  # To use an mtime cache for patched files to speed up builds.
+  'use_mtime_cache': True,
+
  # To allow in-house builds to checkout those manually.
  'checkout_chromium': True,
  'checkout_node': True,
@@ -75,6 +78,8 @@ vars = {
    False,
  'checkout_google_benchmark':
    False,
+  'checkout_clang_tidy':
+    True,
 }

 deps = {
@@ -112,6 +117,23 @@ deps = {
  }
 }

+pre_deps_hooks = [
+  {
+    'name': 'generate_mtime_cache',
+    'condition': '(checkout_chromium and apply_patches and use_mtime_cache) and process_deps',
+    'pattern': 'src/electron',
+    'action': [
+      'python3',
+      'src/electron/script/patches-mtime-cache.py',
+      'generate',
+      '--cache-file',
+      'src/electron/patches/mtime-cache.json',
+      '--patches-config',
+      'src/electron/patches/config.json',
+    ],
+  },
+]
+
 hooks = [
  {
    'name': 'patch_chromium',
@@ -123,6 +145,18 @@ hooks = [
      'src/electron/patches/config.json',
    ],
  },
+  {
+    'name': 'apply_mtime_cache',
+    'condition': '(checkout_chromium and apply_patches and use_mtime_cache) and process_deps',
+    'pattern': 'src/electron',
+    'action': [
+      'python3',
+      'src/electron/script/patches-mtime-cache.py',
+      'apply',
+      '--cache-file',
+      'src/electron/patches/mtime-cache.json',
+    ],
+  },
  {
    'name': 'electron_external_binaries',
    'pattern': 'src/electron/script/update-external-binaries.py',
--- a/2
+++ b/2
@@ -1 +1 @@
-12.0.0-nightly.20201016
+12.2.2
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![devDependency Status](https://david-dm.org/electron/electron/dev-status.svg)](https://david-dm.org/electron/electron?type=dev)
 [![Electron Discord Invite](https://img.shields.io/discord/745037351163527189?color=%237289DA&label=chat&logo=discord&logoColor=white)](https://discord.com/invite/electron)

-:memo: Available Translations: 🇨🇳 🇹🇼 🇧🇷 🇪🇸 🇰🇷 🇯🇵 🇷🇺 🇫🇷 🇹🇭 🇳🇱 🇹🇷 🇮🇩 🇺🇦 🇨🇿 🇮🇹 🇵🇱.
+:memo: Available Translations: 🇨🇳 🇧🇷 🇪🇸 🇯🇵 🇷🇺 🇫🇷 🇺🇸 🇩🇪.
 View these docs in other languages at [electron/i18n](https://github.com/electron/i18n/tree/master/content/).

 The Electron framework lets you write cross-platform desktop applications
@@ -29,15 +29,12 @@ 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
@@ -36,6 +36,7 @@ environment:
  ELECTRON_ENABLE_STACK_DUMPING: 1
  MOCHA_REPORTER: mocha-multi-reporters
  MOCHA_MULTI_REPORTERS: mocha-appveyor-reporter, tap
+  GOMA_FALLBACK_ON_AUTH_FAILURE: true
 notifications:
  - provider: Webhook
    url: https://electron-mission-control.herokuapp.com/rest/appveyor-hook
@@ -66,7 +67,6 @@ build_script:
  - update_depot_tools.bat
  - ps: Move-Item $env:APPVEYOR_BUILD_FOLDER -Destination src\electron
  - ps: $env:CHROMIUM_BUILDTOOLS_PATH="$pwd\src\buildtools"
-  - ps: $env:SCCACHE_PATH="$pwd\src\electron\external_binaries\sccache.exe"
  - ps: >-
      if ($env:GN_CONFIG -eq 'release') {
        $env:GCLIENT_EXTRA_ARGS="$env:GCLIENT_EXTRA_ARGS --custom-var=checkout_requests=True"
@@ -101,6 +101,11 @@ build_script:
          } else {
            # update external binaries
            python src/electron/script/update-external-binaries.py
+            # update angle
+            cd src\third_party\angle
+            git remote set-url origin  https://chromium.googlesource.com/angle/angle.git
+            git fetch
+            cd ..\..\..
          }
        } else {    
          # file does not exist, gclient sync, then zip
@@ -129,27 +134,25 @@ build_script:
        }
      }
  - 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()"
-        $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
+      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
+  - ps: >-
+      node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
+  - ps: $env:GN_GOMA_FILE = node -e "console.log(require('./src/utils/goma.js').gnFilePath)"
+  - ps: $env:LOCAL_GOMA_DIR = node -e "console.log(require('./src/utils/goma.js').dir)"
+  - cd ..
+  - ps: .\src\electron\script\start-goma.ps1 -gomaDir $env:LOCAL_GOMA_DIR
  - cd src
  - 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 gen out/Default "--args=import(\"%BUILD_CONFIG_PATH%\") import(\"%GN_GOMA_FILE%\") %GN_EXTRA_ARGS% "
  - 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
  - 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 )
@@ -165,7 +168,7 @@ build_script:
  - 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 %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
@@ -224,10 +227,10 @@ deploy_script:
      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 +63,8 @@ steps:
    set npm_config_nodedir=%cd%\out\Default\gen\node_headers
    set npm_config_arch=arm64
    cd electron
-    node script/yarn test -- --enable-logging --verbose
+    # CalculateNativeWinOcclusion is disabled due to https://bugs.chromium.org/p/chromium/issues/detail?id=1139022
+    node script/yarn test -- --enable-logging --verbose --disable-features=CalculateNativeWinOcclusion
  displayName: 'Run Electron tests'
  env:
    ELECTRON_OUT_DIR: Default
@@ -92,6 +93,6 @@ steps:
  condition: always()

 - powershell: |
-    Remove-Item -path $env:APPDATA/Electron* -Recurse
+    Remove-Item -path $env:APPDATA/Electron* -Recurse -Force -ErrorAction Ignore
  displayName: 'Delete user app data directories'
  condition: always()
--- a/build/fuses/build.py
+++ b/build/fuses/build.py
@@ -0,0 +1,101 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import sys
+
+dir_path = os.path.dirname(os.path.realpath(__file__))
+
+SENTINEL = "dL7pKGdnNz796PbbjQWNKmHXBZaB9tsX"
+
+TEMPLATE_H = """
+#ifndef ELECTRON_FUSES_H_
+#define ELECTRON_FUSES_H_
+
+#if defined(WIN32)
+#define FUSE_EXPORT __declspec(dllexport)
+#else
+#define FUSE_EXPORT __attribute__((visibility("default")))
+#endif
+
+namespace electron {
+
+namespace fuses {
+
+extern const volatile char kFuseWire[];
+
+{getters}
+
+}  // namespace fuses
+
+}  // namespace electron
+
+#endif  // ELECTRON_FUSES_H_
+"""
+
+TEMPLATE_CC = """
+#include "electron/fuses.h"
+
+namespace electron {
+
+namespace fuses {
+
+const volatile char kFuseWire[] = { /* sentinel */ {sentinel}, /* fuse_version */ {fuse_version}, /* fuse_wire_length */ {fuse_wire_length}, /* fuse_wire */ {initial_config}};
+
+{getters}
+
+}
+
+}
+"""
+
+with open(os.path.join(dir_path, "fuses.json"), 'r') as f:
+  fuse_defaults = json.load(f)
+
+fuse_version = fuse_defaults['_version']
+del fuse_defaults['_version']
+del fuse_defaults['_schema']
+del fuse_defaults['_comment']
+
+if fuse_version >= pow(2, 8):
+  raise Exception("Fuse version can not exceed one byte in size")
+
+fuses = fuse_defaults.keys()
+
+initial_config = ""
+getters_h = ""
+getters_cc = ""
+index = len(SENTINEL) + 1
+for fuse in fuses:
+  index += 1
+  initial_config += fuse_defaults[fuse]
+  name = ''.join(word.title() for word in fuse.split('_'))
+  getters_h += "FUSE_EXPORT bool Is{name}Enabled();\n".replace("{name}", name)
+  getters_cc += """
+bool Is{name}Enabled() {
+  return kFuseWire[{index}] == '1';
+}
+""".replace("{name}", name).replace("{index}", str(index))
+
+def c_hex(n):
+  s = hex(n)[2:]
+  return "0x" + s.rjust(2, '0')
+
+def hex_arr(s):
+  arr = []
+  for char in s:
+    arr.append(c_hex(ord(char)))
+  return ",".join(arr)
+
+header = TEMPLATE_H.replace("{getters}", getters_h.strip())
+impl = TEMPLATE_CC.replace("{sentinel}", hex_arr(SENTINEL))
+impl = impl.replace("{fuse_version}", c_hex(fuse_version))
+impl = impl.replace("{fuse_wire_length}", c_hex(len(fuses)))
+impl = impl.replace("{initial_config}", hex_arr(initial_config))
+impl = impl.replace("{getters}", getters_cc.strip())
+
+with open(sys.argv[1], 'w') as f:
+  f.write(header)
+
+with open(sys.argv[2], 'w') as f:
+  f.write(impl)
--- a/build/fuses/fuses.json
+++ b/build/fuses/fuses.json
@@ -0,0 +1,6 @@
+{
+  "_comment": "Modifying the fuse schema in any breaking way should result in the _version prop being incremented.  NEVER remove a fuse or change its meaning, instead mark it as removed with 'r'",
+  "_schema": "0 == off, 1 == on, r == removed fuse",
+  "_version": 1,
+  "run_as_node": "1"
+}
--- a/build/npm-run.py
+++ b/build/npm-run.py
@@ -15,5 +15,12 @@ args = [cmd, "run",
 try:
    subprocess.check_output(args, stderr=subprocess.STDOUT)
 except subprocess.CalledProcessError as e:
-    print("NPM script '" + sys.argv[2] + "' failed with code '" + str(e.returncode) + "':\n" + e.output)
+    print(
+        "NPM script '"
+        + sys.argv[2]
+        + "' failed with code '"
+        + str(e.returncode)
+        + "':\n"
+        + e.output.decode('utf8')
+    )
    sys.exit(e.returncode)
--- a/build/profile_toolchain.py
+++ b/build/profile_toolchain.py
@@ -19,10 +19,10 @@ from get_toolchain_if_necessary import CalculateHash


@contextlib.contextmanager
-def cwd(dir):
+def cwd(directory):
    curdir = os.getcwd()
    try:
-        os.chdir(dir)
+        os.chdir(directory)
        yield
    finally:
        os.chdir(curdir)
@@ -70,12 +70,18 @@ def windows_profile():
    win_sdk_dir = SetEnvironmentAndGetSDKDir()
    path = NormalizePath(os.environ['GYP_MSVS_OVERRIDE_PATH'])

+    # since current windows executable are symbols path dependant,
+    # profile the current directory too
    return {
-        'pwd': os.getcwd(), # since current windows executable are symbols path dependant, profile the current directory too
+        'pwd': os.getcwd(),
        '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)}
+            {
+                'name': 'wsdk',
+                'path': win_sdk_dir,
+                'hash': calculate_hash(win_sdk_dir),
+            },
        ],
        'runtime_lib_dirs': runtime_dll_dirs,
    }
@@ -93,5 +99,5 @@ 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))
+  opts, args = parser.parse_args()
+  sys.exit(main(opts))
--- a/build/strip_framework.py
+++ b/build/strip_framework.py
@@ -12,5 +12,7 @@ subprocess.check_output(["rm", "-rf", dest])
 subprocess.check_output(["cp", "-a", source, dest])

 # Strip headers, we do not need to ship them
-subprocess.check_output(["rm", "-r", os.path.join(dest, 'Headers')])
-subprocess.check_output(["rm", "-r", os.path.join(dest, 'Versions', 'Current', 'Headers')])
+subprocess.check_output(["rm", "-r", os.path.join(dest, "Headers")])
+subprocess.check_output(
+    ["rm", "-r", os.path.join(dest, "Versions", "Current", "Headers")]
+)
--- a/build/tsc.gni
+++ b/build/tsc.gni
@@ -26,19 +26,12 @@ template("typescript_build") {
      "//electron/typings/internal-electron.d.ts",
    ]

-    type_roots = "node_modules/@types,typings"
-    if (defined(invoker.type_root)) {
-      type_roots += "," + invoker.type_root
-    }
-
    base_out_path = invoker.output_gen_dir + "/electron/"
    args = [
      "-p",
      rebase_path(invoker.tsconfig),
      "--outDir",
      rebase_path("$base_out_path" + invoker.output_dir_name),
-      "--typeRoots",
-      type_roots,
    ]

    outputs = []
--- a/build/webpack/get-outputs.js
+++ b/build/webpack/get-outputs.js
@@ -1,2 +0,0 @@
-process.env.PRINT_WEBPACK_GRAPH = true;
-require('./run-compiler');
--- a/build/webpack/run-compiler.js
+++ b/build/webpack/run-compiler.js
@@ -1,45 +0,0 @@
-const fs = require('fs');
-const path = require('path');
-const webpack = require('webpack');
-
-const configPath = process.argv[2];
-const outPath = path.resolve(process.argv[3]);
-const config = require(configPath);
-config.output = {
-  path: path.dirname(outPath),
-  filename: path.basename(outPath)
-};
-
-const { wrapInitWithProfilingTimeout, wrapInitWithTryCatch, ...webpackConfig } = config;
-
-webpack(webpackConfig, (err, stats) => {
-  if (err) {
-    console.error(err);
-    process.exit(1);
-  } else if (stats.hasErrors()) {
-    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
@@ -2,16 +2,12 @@ const fs = require('fs');
 const path = require('path');
 const webpack = require('webpack');
 const TerserPlugin = require('terser-webpack-plugin');
+const WrapperPlugin = require('wrapper-webpack-plugin');

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

-const onlyPrintingGraph = !!process.env.PRINT_WEBPACK_GRAPH;
-
 class AccessDependenciesPlugin {
  apply (compiler) {
-    // Only hook into webpack when we are printing the dependency graph
-    if (!onlyPrintingGraph) return;
-
    compiler.hooks.compilation.tap('AccessDependenciesPlugin', compilation => {
      compilation.hooks.finishModules.tap('AccessDependenciesPlugin', modules => {
        const filePaths = modules.map(m => m.resource).filter(p => p).map(p => path.relative(electronRoot, p));
@@ -21,49 +17,6 @@ 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,
@@ -79,76 +32,148 @@ module.exports = ({

  const electronAPIFile = path.resolve(electronRoot, 'lib', loadElectronFromAlternateTarget || target, 'api', 'exports', 'electron.ts');

-  return ({
-    mode: 'development',
-    devtool: false,
-    entry,
-    target: alwaysHasNode ? 'node' : 'web',
-    output: {
-      filename: `${target}.bundle.js`
-    },
-    wrapInitWithProfilingTimeout,
-    wrapInitWithTryCatch,
-    resolve: {
-      alias: {
-        '@electron/internal': path.resolve(electronRoot, 'lib'),
-        electron$: electronAPIFile,
-        'electron/main$': electronAPIFile,
-        'electron/renderer$': electronAPIFile,
-        'electron/common$': electronAPIFile,
-        // Force timers to resolve to our dependency that doesn't use window.postMessage
-        timers: path.resolve(electronRoot, 'node_modules', 'timers-browserify', 'main.js')
-      },
-      extensions: ['.ts', '.js']
-    },
-    module: {
-      rules: [{
-        test: (moduleName) => !onlyPrintingGraph && ignoredModules.includes(moduleName),
-        loader: 'null-loader'
-      }, {
-        test: /\.ts$/,
-        loader: 'ts-loader',
-        options: {
-          configFile: path.resolve(electronRoot, 'tsconfig.electron.json'),
-          transpileOnly: onlyPrintingGraph,
-          ignoreDiagnostics: [
-            // File '{0}' is not under 'rootDir' '{1}'.
-            6059
-          ]
+  return (env = {}, argv = {}) => {
+    const onlyPrintingGraph = !!env.PRINT_WEBPACK_GRAPH;
+    const outputFilename = argv['output-filename'] || `${target}.bundle.js`;
+
+    const defines = {
+      BUILDFLAG: onlyPrintingGraph ? '(a => a)' : ''
+    };
+
+    if (env.buildflags) {
+      const flagFile = fs.readFileSync(env.buildflags, '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)));
        }
-      }]
-    },
-    node: {
-      __dirname: false,
-      __filename: false,
-      // We provide our own "timers" import above, any usage of setImmediate inside
-      // 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 ? [
-        new webpack.ProvidePlugin({
-          process: ['@electron/internal/common/webpack-provider', 'process'],
-          global: ['@electron/internal/common/webpack-provider', '_global'],
-          Buffer: ['@electron/internal/common/webpack-provider', 'Buffer']
-        })
-      ] : []),
-      new webpack.ProvidePlugin({
-        Promise: ['@electron/internal/common/webpack-globals-provider', 'Promise']
-      }),
-      new webpack.DefinePlugin(defines)
-    ]
-  });
+      }
+    }
+
+    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'
+      );
+    }
+
+    const plugins = [];
+
+    if (onlyPrintingGraph) {
+      plugins.push(new AccessDependenciesPlugin());
+    }
+
+    if (targetDeletesNodeGlobals) {
+      plugins.push(new webpack.ProvidePlugin({
+        process: ['@electron/internal/common/webpack-provider', 'process'],
+        global: ['@electron/internal/common/webpack-provider', '_global'],
+        Buffer: ['@electron/internal/common/webpack-provider', 'Buffer']
+      }));
+    }
+
+    plugins.push(new webpack.ProvidePlugin({
+      Promise: ['@electron/internal/common/webpack-globals-provider', 'Promise']
+    }));
+
+    plugins.push(new webpack.DefinePlugin(defines));
+
+    if (wrapInitWithProfilingTimeout) {
+      plugins.push(new WrapperPlugin({
+        header: 'function ___electron_webpack_init__() {',
+        footer: `
+};
+if ((globalThis.process || binding.process).argv.includes("--profile-electron-init")) {
+  setTimeout(___electron_webpack_init__, 0);
+} else {
+  ___electron_webpack_init__();
+}`
+      }));
+    }
+
+    if (wrapInitWithTryCatch) {
+      plugins.push(new WrapperPlugin({
+        header: 'try {',
+        footer: `
+} catch (err) {
+  console.error('Electron ${outputFilename} script failed to run');
+  console.error(err);
+}`
+      }));
+    }
+
+    return {
+      mode: 'development',
+      devtool: false,
+      entry,
+      target: alwaysHasNode ? 'node' : 'web',
+      output: {
+        filename: outputFilename
+      },
+      resolve: {
+        alias: {
+          '@electron/internal': path.resolve(electronRoot, 'lib'),
+          electron$: electronAPIFile,
+          'electron/main$': electronAPIFile,
+          'electron/renderer$': electronAPIFile,
+          'electron/common$': electronAPIFile,
+          // Force timers to resolve to our dependency that doesn't use window.postMessage
+          timers: path.resolve(electronRoot, 'node_modules', 'timers-browserify', 'main.js')
+        },
+        extensions: ['.ts', '.js']
+      },
+      module: {
+        rules: [{
+          test: (moduleName) => !onlyPrintingGraph && ignoredModules.includes(moduleName),
+          loader: 'null-loader'
+        }, {
+          test: /\.ts$/,
+          loader: 'ts-loader',
+          options: {
+            configFile: path.resolve(electronRoot, 'tsconfig.electron.json'),
+            transpileOnly: onlyPrintingGraph,
+            ignoreDiagnostics: [
+              // File '{0}' is not under 'rootDir' '{1}'.
+              6059
+            ]
+          }
+        }]
+      },
+      node: {
+        __dirname: false,
+        __filename: false,
+        // We provide our own "timers" import above, any usage of setImmediate inside
+        // one of our renderer bundles should import it from the 'timers' package
+        setImmediate: false
+      },
+      optimization: {
+        minimize: env.mode === 'production',
+        minimizer: [
+          new TerserPlugin({
+            terserOptions: {
+              keep_classnames: true,
+              keep_fnames: true
+            }
+          })
+        ]
+      },
+      plugins
+    };
+  };
 };
--- a/build/webpack/webpack.gni
+++ b/build/webpack/webpack.gni
@@ -16,17 +16,25 @@ 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",
               "//electron/typings/internal-electron.d.ts",
             ] + invoker.inputs

+    mode = "development"
+    if (is_official_build) {
+      mode = "production"
+    }
+
    args = [
+      "--config",
      rebase_path(invoker.config_file),
-      rebase_path(invoker.out_file),
-      "--buildflags=" + rebase_path("$target_gen_dir/buildflags/buildflags.h"),
+      "--output-filename=" + get_path_info(invoker.out_file, "file"),
+      "--output-path=" + rebase_path(get_path_info(invoker.out_file, "dir")),
+      "--env.buildflags=" +
+          rebase_path("$target_gen_dir/buildflags/buildflags.h"),
+      "--env.mode=" + mode,
    ]
    deps += [ "buildflags" ]

--- a/build/zip.py
+++ b/build/zip.py
@@ -9,7 +9,8 @@ EXTENSIONS_TO_SKIP = [
  '.pdb',
  '.mojom.js',
  '.mojom-lite.js',
-  '.info'
+  '.info',
+  '.m.js'
 ]

 PATHS_TO_SKIP = [
@@ -19,11 +20,12 @@ PATHS_TO_SKIP = [
  './libVkICD_mock_',
  # Skip because these are outputs that we don't need.
  './VkICD_mock_',
-  # Skip because its an output of create_bundle from //build/config/mac/rules.gni
-  # that we don't need
+  # Skip because its an output of create_bundle from
+  # //build/config/mac/rules.gni that we don't need
  'Electron.dSYM',
  # Refs https://chromium-review.googlesource.com/c/angle/angle/+/2425197.
-  # Remove this when Angle themselves remove the file: https://issuetracker.google.com/issues/168736059
+  # Remove this when Angle themselves remove the file:
+  # https://issuetracker.google.com/issues/168736059
  'gen/angle/angle_commit.h',
  # //chrome/browser:resources depends on this via
  # //chrome/browser/resources/ssl/ssl_error_assistant, but we don't need to
@@ -49,7 +51,12 @@ def skip_path(dep, dist_zip, target_cpu):
  should_skip = (
    any(dep.startswith(path) for path in PATHS_TO_SKIP) or
    any(dep.endswith(ext) for ext in EXTENSIONS_TO_SKIP) or
-    ('arm' in target_cpu and dist_zip == 'mksnapshot.zip' and dep == 'snapshot_blob.bin'))
+    (
+      "arm" in target_cpu
+      and dist_zip == "mksnapshot.zip"
+      and dep == "snapshot_blob.bin"
+    )
+  )
  if should_skip:
    print("Skipping {}".format(dep))
  return should_skip
@@ -63,7 +70,7 @@ def execute(argv):
    raise e

 def main(argv):
-  dist_zip, runtime_deps, target_cpu, target_os, flatten_val = argv
+  dist_zip, runtime_deps, target_cpu, _, flatten_val = argv
  should_flatten = flatten_val == "true"
  dist_files = set()
  with open(runtime_deps) as f:
@@ -74,17 +81,28 @@ def main(argv):
  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:
+    with zipfile.ZipFile(
+      dist_zip, 'w', zipfile.ZIP_DEFLATED, allowZip64=True
+    ) as z:
      for dep in dist_files:
        if os.path.isdir(dep):
-          for root, dirs, files in os.walk(dep):
-            for file in files:
-              z.write(os.path.join(root, file))
+          for root, _, files in os.walk(dep):
+            for filename in files:
+              z.write(os.path.join(root, filename))
        else:
          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, os.path.basename(arcname) if should_flatten else arcname)
+          arcname = (
+            os.path.join(dirname, 'chrome-sandbox')
+            if basename == 'chrome_sandbox'
+            else dep
+          )
+          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
@@ -20,6 +20,7 @@ buildflag_header("buildflags") {
    "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
@@ -33,4 +33,7 @@ declare_args() {

  # 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
@@ -93,9 +93,18 @@ static_library("chrome") {

  if (is_linux) {
    sources += [ "//chrome/browser/icon_loader_auralinux.cc" ]
+    if (use_x11) {
+      sources += [
+        "//chrome/browser/extensions/global_shortcut_listener_x11.cc",
+        "//chrome/browser/extensions/global_shortcut_listener_x11.h",
+      ]
+    } else if (use_ozone) {
+      sources += [
+        "//chrome/browser/extensions/global_shortcut_listener_ozone.cc",
+        "//chrome/browser/extensions/global_shortcut_listener_ozone.h",
+      ]
+    }
    sources += [
-      "//chrome/browser/extensions/global_shortcut_listener_x11.cc",
-      "//chrome/browser/extensions/global_shortcut_listener_x11.h",
      "//chrome/browser/ui/views/status_icons/concat_menu_model.cc",
      "//chrome/browser/ui/views/status_icons/concat_menu_model.h",
      "//chrome/browser/ui/views/status_icons/status_icon_linux_dbus.cc",
@@ -130,14 +139,23 @@ static_library("chrome") {

  if (enable_color_chooser) {
    sources += [
+      "//chrome/browser/devtools/devtools_eye_dropper.cc",
+      "//chrome/browser/devtools/devtools_eye_dropper.h",
      "//chrome/browser/platform_util.cc",
      "//chrome/browser/platform_util.h",
      "//chrome/browser/ui/browser_dialogs.h",
      "//chrome/browser/ui/color_chooser.h",
+      "//chrome/browser/ui/views/eye_dropper/eye_dropper.cc",
+      "//chrome/browser/ui/views/eye_dropper/eye_dropper.h",
+      "//chrome/browser/ui/views/eye_dropper/eye_dropper_view.cc",
+      "//chrome/browser/ui/views/eye_dropper/eye_dropper_view.h",
    ]

    if (use_aura) {
-      sources += [ "//chrome/browser/platform_util_aura.cc" ]
+      sources += [
+        "//chrome/browser/platform_util_aura.cc",
+        "//chrome/browser/ui/views/eye_dropper/eye_dropper_view_aura.cc",
+      ]

      if (!is_win) {
        sources += [
@@ -154,6 +172,8 @@ static_library("chrome") {
        "//chrome/browser/media/webrtc/window_icon_util_mac.mm",
        "//chrome/browser/ui/cocoa/color_chooser_mac.h",
        "//chrome/browser/ui/cocoa/color_chooser_mac.mm",
+        "//chrome/browser/ui/views/eye_dropper/eye_dropper_view_mac.h",
+        "//chrome/browser/ui/views/eye_dropper/eye_dropper_view_mac.mm",
      ]
      deps += [
        "//components/remote_cocoa/app_shim",
@@ -199,8 +219,6 @@ static_library("chrome") {
      "//chrome/browser/printing/print_view_manager_basic.h",
      "//chrome/browser/printing/printer_query.cc",
      "//chrome/browser/printing/printer_query.h",
-      "//chrome/browser/printing/printing_message_filter.cc",
-      "//chrome/browser/printing/printing_message_filter.h",
      "//chrome/browser/printing/printing_service.cc",
      "//chrome/browser/printing/printing_service.h",
    ]
@@ -277,13 +295,15 @@ static_library("chrome") {
    }
  }

-  sources += [ "//chrome/browser/hang_monitor/hang_crash_dump.h" ]
-  if (is_mac) {
-    sources += [ "//chrome/browser/hang_monitor/hang_crash_dump_mac.cc" ]
-  } else if (is_win) {
-    sources += [ "//chrome/browser/hang_monitor/hang_crash_dump_win.cc" ]
-  } else {
-    sources += [ "//chrome/browser/hang_monitor/hang_crash_dump.cc" ]
+  if (!is_mas_build) {
+    sources += [ "//chrome/browser/hang_monitor/hang_crash_dump.h" ]
+    if (is_mac) {
+      sources += [ "//chrome/browser/hang_monitor/hang_crash_dump_mac.cc" ]
+    } else if (is_win) {
+      sources += [ "//chrome/browser/hang_monitor/hang_crash_dump_win.cc" ]
+    } else {
+      sources += [ "//chrome/browser/hang_monitor/hang_crash_dump.cc" ]
+    }
  }
 }

@@ -296,8 +316,6 @@ source_set("plugins") {
  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",
  ]
--- a/chromium_src/chrome/browser/process_singleton_posix.cc
+++ b/chromium_src/chrome/browser/process_singleton_posix.cc
@@ -826,10 +826,9 @@ ProcessSingleton::NotifyResult ProcessSingleton::NotifyOtherProcessWithTimeout(
  to_send.append(current_dir.value());

  const std::vector<std::string>& argv = electron::ElectronCommandLine::argv();
-  for (std::vector<std::string>::const_iterator it = argv.begin();
-       it != argv.end(); ++it) {
+  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/ui/views/frame/global_menu_bar_registrar_x11.cc
+++ b/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc
@@ -122,8 +122,7 @@ void GlobalMenuBarRegistrarX11::OnNameOwnerChanged(GObject* /* ignored */,
                                                   GParamSpec* /* ignored */) {
  // If the name owner changed, we need to reregister all the live x11::Window
  // with the system.
-  for (std::set<x11::Window>::const_iterator it = live_windows_.begin();
-       it != live_windows_.end(); ++it) {
-    RegisterXWindow(*it);
+  for (const auto& window : live_windows_) {
+    RegisterXWindow(window);
  }
 }
--- a/default_app/default_app.ts
+++ b/default_app/default_app.ts
@@ -41,14 +41,14 @@ ipcMain.handle('bootstrap', (event) => {
  return isTrustedSender(event.sender) ? electronPath : null;
 });

-async function createWindow () {
+async function createWindow (backgroundColor?: string) {
  await app.whenReady();

  const options: Electron.BrowserWindowConstructorOptions = {
    width: 960,
    height: 620,
    autoHideMenuBar: true,
-    backgroundColor: '#2f3241',
+    backgroundColor,
    webPreferences: {
      preload: path.resolve(__dirname, 'preload.js'),
      contextIsolation: true,
@@ -96,7 +96,7 @@ export const loadURL = async (appUrl: string) => {
 };

 export const loadFile = async (appPath: string) => {
-  mainWindow = await createWindow();
+  mainWindow = await createWindow(appPath === 'index.html' ? '#2f3241' : undefined);
  mainWindow.loadFile(appPath);
  mainWindow.focus();
 };
--- a/docs/README.md
+++ b/docs/README.md
@@ -18,27 +18,14 @@ an issue:

 ## Guides and Tutorials

-* [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)
-  * [Setting up Linux](tutorial/development-environment.md#setting-up-linux)
-  * [Choosing an Editor](tutorial/development-environment.md#a-good-editor)
-* [Creating your First App](tutorial/quick-start.md)
-  * [Prerequisites](tutorial/quick-start.md#prerequisites)
-  * [Create a basic application](tutorial/quick-start.md#create-a-basic-application)
-  * [Package and distribute the application](tutorial/quick-start.md#package-and-distribute-the-application)
-* [Boilerplates and CLIs](tutorial/boilerplates-and-clis.md)
-  * [Boilerplate vs CLI](tutorial/boilerplates-and-clis.md#boilerplate-vs-cli)
-  * [electron-forge](tutorial/boilerplates-and-clis.md#electron-forge)
-  * [electron-builder](tutorial/boilerplates-and-clis.md#electron-builder)
-  * [electron-react-boilerplate](tutorial/boilerplates-and-clis.md#electron-react-boilerplate)
-  * [Other Tools and Boilerplates](tutorial/boilerplates-and-clis.md#other-tools-and-boilerplates)
-* [Application Architecture](tutorial/quick-start.md#application-architecture)
-  * [Main and Renderer Processes](tutorial/quick-start.md#main-and-renderer-processes)
-  * [Electron API](tutorial/quick-start.md#electron-api)
-  * [Node.js API](tutorial/quick-start.md#nodejs-api)
-  * [Using Native Node.js Modules](tutorial/using-native-node-modules.md)
-  * [Performance Strategies](tutorial/performance.md)
+### Getting started
+
+* [Introduction](tutorial/introduction.md)
+* [Quick Start](tutorial/quick-start.md)
+* [Process Model](tutorial/process-model.md)
+
+### Learning the basics
+
 * Adding Features to Your App
  * [Notifications](tutorial/notifications.md)
  * [Recent Documents](tutorial/recent-documents.md)
@@ -51,30 +38,38 @@ an issue:
  * [Represented File for macOS BrowserWindows](tutorial/represented-file.md)
  * [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)
+  * [Dark Mode](tutorial/dark-mode.md)
  * [Web embeds in Electron](tutorial/web-embeds.md)
+* [Boilerplates and CLIs](tutorial/boilerplates-and-clis.md)
+  * [Boilerplate vs CLI](tutorial/boilerplates-and-clis.md#boilerplate-vs-cli)
+  * [electron-forge](tutorial/boilerplates-and-clis.md#electron-forge)
+  * [electron-builder](tutorial/boilerplates-and-clis.md#electron-builder)
+  * [electron-react-boilerplate](tutorial/boilerplates-and-clis.md#electron-react-boilerplate)
+  * [Other Tools and Boilerplates](tutorial/boilerplates-and-clis.md#other-tools-and-boilerplates)
+
+### Advanced steps
+
+* Application Architecture
+  * [Using Native Node.js Modules](tutorial/using-native-node-modules.md)
+  * [Performance Strategies](tutorial/performance.md)
+  * [Security Strategies](tutorial/security.md)
+  * [Process Sandboxing](tutorial/sandbox.md)
 * [Accessibility](tutorial/accessibility.md)
-  * [Spectron](tutorial/accessibility.md#spectron)
-  * [Devtron](tutorial/accessibility.md#devtron)
  * [Manually Enabling Accessibility Features](tutorial/accessibility.md#manually-enabling-accessibility-features)
 * [Testing and Debugging](tutorial/application-debugging.md)
  * [Debugging the Main Process](tutorial/debugging-main-process.md)
-  * [Debugging the Main Process with Visual Studio Code](tutorial/debugging-main-process-vscode.md)
+  * [Debugging with Visual Studio Code](tutorial/debugging-vscode.md)
  * [Using Selenium and WebDriver](tutorial/using-selenium-and-webdriver.md)
  * [Testing on Headless CI Systems (Travis, Jenkins)](tutorial/testing-on-headless-ci.md)
  * [DevTools Extension](tutorial/devtools-extension.md)
  * [Automated Testing with a Custom Driver](tutorial/automated-testing-with-a-custom-driver.md)
+  * [REPL](tutorial/repl.md)
 * [Distribution](tutorial/application-distribution.md)
  * [Supported Platforms](tutorial/support.md#supported-platforms)
  * [Code Signing](tutorial/code-signing.md)
  * [Mac App Store](tutorial/mac-app-store-submission-guide.md)
  * [Windows Store](tutorial/windows-store-guide.md)
  * [Snapcraft](tutorial/snapcraft.md)
-* [Security](tutorial/security.md)
-  * [Reporting Security Issues](tutorial/security.md#reporting-security-issues)
-  * [Chromium Security Issues and Upgrades](tutorial/security.md#chromium-security-issues-and-upgrades)
-  * [Electron Security Warnings](tutorial/security.md#electron-security-warnings)
-  * [Security Checklist](tutorial/security.md#checklist-security-recommendations)
 * [Updates](tutorial/updates.md)
  * [Deploying an Update Server](tutorial/updates.md#deploying-an-update-server)
  * [Implementing Updates in Your App](tutorial/updates.md#implementing-updates-in-your-app)
@@ -92,11 +87,6 @@ These individual tutorials expand on topics discussed in the guide above.
 * Electron Releases & Developer Feedback
  * [Versioning Policy](tutorial/electron-versioning.md)
  * [Release Timelines](tutorial/electron-timelines.md)
-* [Packaging App Source Code with asar](tutorial/application-packaging.md)
-  * [Generating asar Archives](tutorial/application-packaging.md#generating-asar-archives)
-  * [Using asar Archives](tutorial/application-packaging.md#using-asar-archives)
-  * [Limitations](tutorial/application-packaging.md#limitations-of-the-node-api)
-  * [Adding Unpacked Files to asar Archives](tutorial/application-packaging.md#adding-unpacked-files-to-asar-archives)
 * [Testing Widevine CDM](tutorial/testing-widevine-cdm.md)

 ---
@@ -132,14 +122,18 @@ These individual tutorials expand on topics discussed in the guide above.
 * [ipcMain](api/ipc-main.md)
 * [Menu](api/menu.md)
 * [MenuItem](api/menu-item.md)
+* [MessageChannelMain](api/message-channel-main.md)
+* [MessagePortMain](api/message-port-main.md)
 * [net](api/net.md)
 * [netLog](api/net-log.md)
+* [nativeTheme](api/native-theme.md)
 * [Notification](api/notification.md)
 * [powerMonitor](api/power-monitor.md)
 * [powerSaveBlocker](api/power-save-blocker.md)
 * [protocol](api/protocol.md)
 * [screen](api/screen.md)
 * [session](api/session.md)
+* [ShareMenu](api/share-menu.md)
 * [systemPreferences](api/system-preferences.md)
 * [TouchBar](api/touch-bar.md)
 * [Tray](api/tray.md)
@@ -148,15 +142,15 @@ These individual tutorials expand on topics discussed in the guide above.

 ### Modules for the Renderer Process (Web Page):

-* [desktopCapturer](api/desktop-capturer.md)
+* [contextBridge](api/context-bridge.md)
 * [ipcRenderer](api/ipc-renderer.md)
-* [remote](api/remote.md)
 * [webFrame](api/web-frame.md)

 ### Modules for Both Processes:

 * [clipboard](api/clipboard.md)
 * [crashReporter](api/crash-reporter.md)
+* [desktopCapturer](api/desktop-capturer.md)
 * [nativeImage](api/native-image.md)
 * [shell](api/shell.md)

--- a/docs/api/accelerator.md
+++ b/docs/api/accelerator.md
@@ -35,7 +35,7 @@ Linux and Windows to define some accelerators.
 Use `Alt` instead of `Option`. The `Option` key only exists on macOS, whereas
 the `Alt` key is available on all platforms.

-The `Super` key is mapped to the `Windows` key on Windows and Linux and
+The `Super` (or `Meta`) key is mapped to the `Windows` key on Windows and Linux and
 `Cmd` on macOS.

 ## Available modifiers
@@ -48,6 +48,7 @@ The `Super` key is mapped to the `Windows` key on Windows and Linux and
 * `AltGr`
 * `Shift`
 * `Super`
+* `Meta`

 ## Available key codes

--- a/docs/api/app.md
+++ b/docs/api/app.md
@@ -32,10 +32,12 @@ In most cases, you should do everything in the `ready` event handler.

 Returns:

-* `launchInfo` unknown _macOS_
+* `event` Event
+* `launchInfo` Record<string, any> | [NotificationResponse](structures/notification-response.md) _macOS_

 Emitted once, when Electron has finished initializing. On macOS, `launchInfo`
-holds the `userInfo` of the `NSUserNotification` that was used to open the
+holds the `userInfo` of the `NSUserNotification` or information from
+[`UNNotificationResponse`](structures/notification-response.md) 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.
@@ -389,7 +391,7 @@ which contains more information about why the render process disappeared. 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'
+### Event: 'render-process-gone'

 Returns:

@@ -404,11 +406,14 @@ Returns:
    * `oom` - Process ran out of memory
    * `launch-failed` - Process never successfully launched
    * `integrity-failure` - Windows code integrity checks failed
+  * `exitCode` Integer - The exit code of the process, unless `reason` is
+    `launch-failed`, in which case `exitCode` will be a platform-specific
+    launch failure error code.

 Emitted when the renderer process unexpectedly disappears.  This is normally
 because it was crashed or killed.

-#### Event: 'child-process-gone'
+### Event: 'child-process-gone'

 Returns:

@@ -432,6 +437,7 @@ Returns:
    * `integrity-failure` - Windows code integrity checks failed
  * `exitCode` Number - The exit code for the process
      (e.g. status from waitpid if on posix, from GetExitCodeProcess on Windows).
+  * `serviceName` String (optional) - The non-localized name of the process.
  * `name` String (optional) - The name of the process.
    Examples for utility: `Audio Service`, `Content Decryption Module Service`, `Network Service`, `Video Capture`, etc.

@@ -747,7 +753,8 @@ Overrides the current application's name.

 ### `app.getLocale()`

-Returns `String` - The current application locale. Possible return values are documented [here](locales.md).
+Returns `String` - The current application locale, fetched using Chromium's `l10n_util` library.
+Possible return values are documented [here](https://source.chromium.org/chromium/chromium/src/+/master:ui/base/l10n/l10n_util.cc).

 To set the locale, you'll want to use a command line switch at app startup, which may be found [here](https://github.com/electron/electron/blob/master/docs/api/command-line-switches.md).

@@ -856,9 +863,10 @@ This method returns the application name of the default handler for the protocol
  minimum (e.g. `https://`).

 Returns `Promise<Object>` - Resolve with an object containing the following:
-  * `icon` NativeImage - the display icon of the app handling the protocol.
-  * `path` String  - installation path of the app handling the protocol.
-  * `name` String - display name of the app handling the protocol.
+
+* `icon` NativeImage - the display icon of the app handling the protocol.
+* `path` String  - installation path of the app handling the protocol.
+* `name` String - display name of the app handling the protocol.

 This method returns a promise that contains the application name, icon and path of the default handler for the protocol
 (aka URI scheme) of a URL.
@@ -922,6 +930,10 @@ re-add a removed item to a custom category earlier than that will result in the
 entire custom category being omitted from the Jump List. The list of removed
 items can be obtained using `app.getJumpListSettings()`.

+**Note:** The maximum length of a Jump List item's `description` property is
+260 characters. Beyond this limit, the item will not be added to the Jump
+List, nor will it be displayed.
+
 Here's a very simple example of creating a custom Jump List:

 ```javascript
@@ -1088,6 +1100,7 @@ Changes the [Application User Model ID][app-user-model-id] to `id`.
 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.
@@ -1102,7 +1115,7 @@ Activation policy types:

 Imports the certificate in pkcs12 format into the platform certificate store.
 `callback` is called with the `result` of import operation, a value of `0`
-indicates success while any other value indicates failure according to Chromium [net_error_list](https://code.google.com/p/chromium/codesearch#chromium/src/net/base/net_error_list.h).
+indicates success while any other value indicates failure according to Chromium [net_error_list](https://source.chromium.org/chromium/chromium/src/+/master:net/base/net_error_list.h).

 ### `app.disableHardwareAcceleration()`

@@ -1139,6 +1152,7 @@ For `infoType` equal to `complete`:

 For `infoType` equal to `basic`:
  Promise is fulfilled with `Object` containing fewer attributes than when requested with `complete`. Here's an example of basic response:
+
 ```js
 {
  auxAttributes:
@@ -1168,9 +1182,9 @@ For `infoType` equal to `basic`:

 Using `basic` should be preferred if only basic information like `vendorId` or `driverId` is needed.

-### `app.setBadgeCount(count)` _Linux_ _macOS_
+### `app.setBadgeCount([count])` _Linux_ _macOS_

-* `count` Integer
+* `count` Integer (optional) - If a value is provided, set the badge to the provided value otherwise, on macOS, display a plain white dot (e.g. unknown number of notifications). On Linux, if a value is not provided the badge will not display.

 Returns `Boolean` - Whether the call succeeded.

@@ -1339,7 +1353,7 @@ 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
@@ -1483,3 +1497,12 @@ which native modules you can use in the renderer process.  For more information
 on the direction Electron is going with renderer process restarts and usage of
 native modules in the renderer process please check out this
 [Tracking Issue](https://github.com/electron/electron/issues/18397).
+
+### `app.runningUnderRosettaTranslation` _macOS_ _Readonly_
+
+A `Boolean` which when `true` indicates that the app is currently running
+under the [Rosetta Translator Environment](https://en.wikipedia.org/wiki/Rosetta_(software)).
+
+You can use this property to prompt users to download the arm64 version of
+your application when they are running the x64 version under Rosetta
+incorrectly.
--- a/docs/api/browser-view.md
+++ b/docs/api/browser-view.md
@@ -1,14 +1,16 @@
-## Class: BrowserView
-
-> Create and control views.
-
-Process: [Main](../glossary.md#main-process)
+# BrowserView

 A `BrowserView` can be used to embed additional web content into a
 [`BrowserWindow`](browser-window.md). It is like a child window, except that it is positioned
 relative to its owning window. It is meant to be an alternative to the
 `webview` tag.

+## Class: BrowserView
+
+> Create and control views.
+
+Process: [Main](../glossary.md#main-process)
+
 ### Example

 ```javascript
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -265,12 +265,12 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      be the absolute file path to the script.
      When node integration is turned off, the preload script can reintroduce
      Node global symbols back to the global scope. See example
-      [here](process.md#event-loaded).
+      [here](context-bridge.md#exposing-node-global-symbols).
    * `sandbox` Boolean (optional) - If set, this will sandbox the renderer
      associated with the window, making it compatible with the Chromium
      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).
+      are more limited. Read more about the option [here](../tutorial/sandbox.md).
    * `enableRemoteModule` Boolean (optional) - Whether to enable the [`remote`](remote.md) module.
      Default is `false`.
    * `session` [Session](session.md#class-session) (optional) - Sets the session used by the
@@ -337,21 +337,19 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      more details.
    * `contextIsolation` Boolean (optional) - Whether to run Electron APIs and
      the specified `preload` script in a separate JavaScript context. Defaults
-      to `false`. The context that the `preload` script runs in will still
-      have full access to the `document` and `window` globals but it will use
-      its own set of JavaScript builtins (`Array`, `Object`, `JSON`, etc.)
-      and will be isolated from any changes made to the global environment
-      by the loaded page. The Electron API will only be available in the
-      `preload` script and not the loaded page. This option should be used when
-      loading potentially untrusted remote content to ensure the loaded content
-      cannot tamper with the `preload` script and any Electron APIs being used.
-      This option uses the same technique used by [Chrome Content Scripts][chrome-content-scripts].
-      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.
+      to `true`. The context that the `preload` script runs in will only have
+      access to its own dedicated `document` and `window` globals, as well as
+      its own set of JavaScript builtins (`Array`, `Object`, `JSON`, etc.),
+      which are all invisible to the loaded content. The Electron API will only
+      be available in the `preload` script and not the loaded page. This option
+      should be used when loading potentially untrusted remote content to ensure
+      the loaded content cannot tamper with the `preload` script and any
+      Electron APIs being used.  This option uses the same technique used by
+      [Chrome Content Scripts][chrome-content-scripts].  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_
+      can't unsafely cross between worlds when using `contextIsolation`. Defaults 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
@@ -398,6 +396,11 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      * `bypassHeatCheck` - Bypass code caching heuristics but with lazy compilation
      * `bypassHeatCheckAndEagerCompile` - Same as above except compilation is eager.
      Default policy is `code`.
+    * `enablePreferredSizeMode` Boolean (optional) - Whether to enable
+      preferred size mode. The preferred size is the minimum size needed to
+      contain the layout of the document—without requiring scrolling. Enabling
+      this will cause the `preferred-size-changed` event to be emitted on the
+      `WebContents` when the preferred size changes. Default is `false`.

 When setting minimum or maximum window size with `minWidth`/`maxWidth`/
 `minHeight`/`maxHeight`, it only constrains the users. It won't prevent you from
@@ -463,6 +466,7 @@ window.onbeforeunload = (e) => {
  e.returnValue = false // equivalent to `return false` but not recommended
 }
 ```
+
 _**Note**: There is a subtle difference between the behaviors of `window.onbeforeunload = handler` and `window.addEventListener('beforeunload', handler)`. It is recommended to always set the `event.returnValue` explicitly, instead of only returning a value, as the former works more consistently within Electron._

 #### Event: 'closed'
@@ -538,6 +542,12 @@ Note that this is only emitted when the window is being resized manually. Resizi

 Emitted after the window has been resized.

+#### Event: 'resized' _macOS_ _Windows_
+
+Emitted once when the window has finished being resized.
+
+This is usually emitted when the window has been resized manually. On macOS, resizing the window with `setBounds`/`setSize` and setting the `animate` parameter to `true` will also emit this event once resizing has finished.
+
 #### Event: 'will-move' _macOS_ _Windows_

 Returns:
@@ -553,12 +563,12 @@ Note that this is only emitted when the window is being resized manually. Resizi

 Emitted when the window is being moved to a new position.

-__Note__: On macOS this event is an alias of `moved`.
-
-#### Event: 'moved' _macOS_
+#### Event: 'moved' _macOS_ _Windows_

 Emitted once when the window is moved to a new position.

+__Note__: On macOS this event is an alias of `move`.
+
 #### Event: 'enter-full-screen'

 Emitted when the window enters a full-screen state.
@@ -724,7 +734,7 @@ The method will also not return if the extension's manifest is missing or incomp
 is emitted.

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

 #### `BrowserWindow.removeExtension(name)` _Deprecated_

@@ -766,7 +776,7 @@ The method will also not return if the extension's manifest is missing or incomp
 is emitted.

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

 #### `BrowserWindow.removeDevToolsExtension(name)` _Deprecated_

@@ -854,7 +864,7 @@ 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`
+#### `win.kiosk`

 A `Boolean` property that determines whether the window is in kiosk mode.

@@ -1040,11 +1050,11 @@ 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_ _Linux_
+#### `win.setAspectRatio(aspectRatio[, extraSize])`

 * `aspectRatio` Float - The aspect ratio to maintain for some portion of the
 content view.
- * `extraSize` [Size](structures/size.md) (optional) _macOS_ - 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
@@ -1061,6 +1071,9 @@ the player itself we would call this function with arguments of 16/9 and
 are within the content view--only that they exist. Sum any extra width and
 height areas you have within the overall content view.

+The aspect ratio is not respected when window is resized programmingly with
+APIs like `win.setSize`.
+
 #### `win.setBackgroundColor(backgroundColor)`

 * `backgroundColor` String - Window's background color as a hexadecimal value,
@@ -1373,7 +1386,7 @@ can be be used to listen to changes to tablet mode.

 #### `win.getMediaSourceId()`

-Returns `String` - Window id in the format of DesktopCapturerSource's id. For example "window:1234:0".
+Returns `String` - Window id in the format of DesktopCapturerSource's id. For example "window:1324:0".

 More precisely the format is `window:id:other_id` where `id` is `HWND` on
 Windows, `CGWindowID` (`uint64_t`) on macOS and `Window` (`unsigned long`) on
@@ -1391,6 +1404,8 @@ The native type of the handle is `HWND` on Windows, `NSView*` on macOS, and

 * `message` Integer
 * `callback` Function
+  * `wParam` any - The `wParam` provided to the WndProc
+  * `lParam` any - The `lParam` provided to the WndProc

 Hooks a windows message. The `callback` is called when
 the message is received in the WndProc.
@@ -1443,7 +1458,7 @@ Returns `Boolean` - Whether the window's document has been edited.

 Returns `Promise<NativeImage>` - Resolves with a [NativeImage](native-image.md)

-Captures a snapshot of the page within `rect`. Omitting `rect` will capture the whole visible page.
+Captures a snapshot of the page within `rect`. Omitting `rect` will capture the whole visible page. If the page is not visible, `rect` may be empty.

 #### `win.loadURL(url[, options])`

@@ -1853,6 +1868,13 @@ Replacement API for setBrowserView supporting work with multi browser views.

 * `browserView` [BrowserView](browser-view.md)

+#### `win.setTopBrowserView(browserView)` _Experimental_
+
+* `browserView` [BrowserView](browser-view.md)
+
+Raises `browserView` above other `BrowserView`s attached to `win`.
+Throws an error if `browserView` is not attached to `win`.
+
 #### `win.getBrowserViews()` _Experimental_

 Returns `BrowserView[]` - an array of all BrowserViews that have been attached
--- a/docs/api/client-request.md
+++ b/docs/api/client-request.md
@@ -47,6 +47,7 @@ following properties:
    be aborted. When mode is `manual` the redirection will be cancelled unless
    [`request.followRedirect`](#requestfollowredirect) is invoked synchronously
    during the [`redirect`](#event-redirect) event.  Defaults to `follow`.
+  * `origin` String (optional) - The origin URL of the request.

 `options` properties such as `protocol`, `host`, `hostname`, `port` and `path`
 strictly follow the Node.js model as described in the
@@ -70,7 +71,7 @@ const request = net.request({

 Returns:

-* `response` IncomingMessage - An object representing the HTTP response message.
+* `response` [IncomingMessage](incoming-message.md) - An object representing the HTTP response message.

 #### Event: 'login'

@@ -98,6 +99,7 @@ request.on('login', (authInfo, callback) => {
  callback('username', 'password')
 })
 ```
+
 Providing empty credentials will cancel the request and report an authentication
 error on the response object:

@@ -139,7 +141,6 @@ Emitted as the last event in the HTTP request-response transaction. The `close`
 event indicates that no more events will be emitted on either the `request` or
 `response` objects.

-
 #### Event: 'redirect'

 Returns:
--- a/docs/api/command-line-switches.md
+++ b/docs/api/command-line-switches.md
@@ -64,6 +64,7 @@ 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`
@@ -79,6 +80,12 @@ 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.

+### --force-fieldtrials=`trials`
+
+Field trials to be forcefully enabled or disabled.
+
+For example: `WebRTC-Audio-Red-For-Opus/Enabled/`
+
 ### --host-rules=`rules`

 A comma-separated list of `rules` that control how hostnames are mapped.
@@ -135,7 +142,8 @@ proxy server flags that are passed.

 ### --no-sandbox

-Disables Chromium sandbox, which is now enabled by default.
+Disables the Chromium [sandbox](https://www.chromium.org/developers/design-documents/sandbox).
+Forces renderer process and Chromium helper processes to run un-sandboxed.
 Should only be used for testing.

 ### --proxy-bypass-list=`hosts`
@@ -227,12 +235,13 @@ See the [Debugging the Main Process][debugging-main-process] guide for more deta
 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
+[append-switch]: command-line.md#commandlineappendswitchswitch-value
 [ready]: app.md#event-ready
 [play-silent-audio]: https://github.com/atom/atom/pull/9485/files
 [debugging-main-process]: ../tutorial/debugging-main-process.md
--- a/docs/api/content-tracing.md
+++ b/docs/api/content-tracing.md
@@ -16,7 +16,7 @@ const { app, contentTracing } = require('electron')
 app.whenReady().then(() => {
  (async () => {
    await contentTracing.startRecording({
-      include_categories: ['*']
+      included_categories: ['*']
    })
    console.log('Tracing started')
    await new Promise(resolve => setTimeout(resolve, 5000))
--- a/docs/api/context-bridge.md
+++ b/docs/api/context-bridge.md
@@ -33,7 +33,7 @@ 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
+When `contextIsolation` is enabled in your `webPreferences` (this is the default behavior since Electron 12.0.0), 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.

@@ -44,19 +44,19 @@ The `contextBridge` module has the following methods:
 ### `contextBridge.exposeInMainWorld(apiKey, api)` _Experimental_

 * `apiKey` String - The key to inject the API onto `window` with.  The API will be accessible on `window[apiKey]`.
-* `api` Record<String, any> - Your API object, more information on what this API can be and how it works is available below.
+* `api` any - Your API, more information on what this API can be and how it works is available below.

 ## Usage

-### API Objects
+### API

-The `api` object provided to [`exposeInMainWorld`](#contextbridgeexposeinmainworldapikey-api-experimental) must be an object
+The `api` provided to [`exposeInMainWorld`](#contextbridgeexposeinmainworldapikey-api-experimental) must be a `Function`, `String`, `Number`, `Array`, `Boolean`, or an object
 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**. 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.
+the API 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 is shown below:

 ```javascript
 const { contextBridge } = require('electron')
@@ -108,5 +108,23 @@ has been included below for completeness:
 | [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.
+
+### Exposing Node Global Symbols
+
+The `contextBridge` can be used by the preload script to give your renderer access to Node APIs.
+The table of supported types described above also applies to Node APIs that you expose through `contextBridge`.
+Please note that many Node APIs grant access to local system resources.
+Be very cautious about which globals and APIs you expose to untrusted remote content.
+
+```javascript
+const { contextBridge } = require('electron')
+const crypto = require('crypto')
+contextBridge.exposeInMainWorld('nodeCrypto', {
+  sha256sum (data) {
+    const hash = crypto.createHash('sha256')
+    hash.update(data)
+    return hash.digest('hex')
+  }
+})
+```
--- a/docs/api/cookies.md
+++ b/docs/api/cookies.md
@@ -45,6 +45,8 @@ The following events are available on instances of `Cookies`:

 #### Event: 'changed'

+Returns:
+
 * `event` Event
 * `cookie` [Cookie](structures/cookie.md) - The cookie that was changed.
 * `cause` String - The cause of the change with one of the following values:
--- a/docs/api/crash-reporter.md
+++ b/docs/api/crash-reporter.md
@@ -128,7 +128,7 @@ 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.
+**Note:** This method is only available in the main process.

 ### `crashReporter.getLastCrashReport()`

@@ -137,7 +137,7 @@ 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.
+**Note:** This method is only available in the main process.

 ### `crashReporter.getUploadedReports()`

@@ -146,14 +146,14 @@ 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.
+**Note:** This method is only available in the main process.

 ### `crashReporter.getUploadToServer()`

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

-**Note:** Calling this method from the renderer process is deprecated.
+**Note:** This method is only available in the main process.

 ### `crashReporter.setUploadToServer(uploadToServer)`

@@ -162,13 +162,7 @@ the `start` method or `setUploadToServer`.
 This would normally be controlled by user preferences. This has no effect if
 called before `start` is called.

-**Note:** Calling this method from the renderer process is deprecated.
-
-### `crashReporter.getCrashesDirectory()` _Deprecated_
-
-Returns `String` - The directory where crashes are temporarily stored before being uploaded.
-
-**Note:** This method is deprecated, use `app.getPath('crashDumps')` instead.
+**Note:** This method is only available in the main process.

 ### `crashReporter.addExtraParameter(key, value)`

--- a/docs/api/desktop-capturer.md
+++ b/docs/api/desktop-capturer.md
@@ -95,7 +95,7 @@ Returns `Promise<DesktopCapturerSource[]>` - Resolves with an array of [`Desktop
 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
+[`systemPreferences.getMediaAccessStatus`]: system-preferences.md#systempreferencesgetmediaaccessstatusmediatype-windows-macos

 ## Caveats

--- a/docs/api/dialog.md
+++ b/docs/api/dialog.md
@@ -24,7 +24,7 @@ The `dialog` module has the following methods:
  * `buttonLabel` String (optional) - Custom label for the confirmation button, when
    left empty the default label will be used.
  * `filters` [FileFilter[]](structures/file-filter.md) (optional)
-  * `properties` String[] (optional) - Contains which features the dialog should
+  * `properties` String[]&#32;(optional) - Contains which features the dialog should
    use. The following values are supported:
    * `openFile` - Allow files to be selected.
    * `openDirectory` - Allow directories to be selected.
@@ -87,7 +87,7 @@ dialog.showOpenDialogSync(mainWindow, {
  * `buttonLabel` String (optional) - Custom label for the confirmation button, when
    left empty the default label will be used.
  * `filters` [FileFilter[]](structures/file-filter.md) (optional)
-  * `properties` String[] (optional) - Contains which features the dialog should
+  * `properties` String[]&#32;(optional) - Contains which features the dialog should
    use. The following values are supported:
    * `openFile` - Allow files to be selected.
    * `openDirectory` - Allow directories to be selected.
@@ -112,7 +112,7 @@ 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. (For return values, see [table here](#bookmarks-array).)
+* `bookmarks` String[]&#32;(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.

@@ -154,7 +154,7 @@ dialog.showOpenDialog(mainWindow, {

 * `browserWindow` [BrowserWindow](browser-window.md) (optional)
 * `options` Object
-  * `title` String (optional)
+  * `title` String (optional) - The dialog title. Cannot be displayed on some _Linux_ desktop environments.
  * `defaultPath` String (optional) - Absolute directory path, absolute file
    path, or file name to use by default.
  * `buttonLabel` String (optional) - Custom label for the confirmation button, when
@@ -165,7 +165,7 @@ dialog.showOpenDialog(mainWindow, {
    displayed in front of the filename text field.
  * `showsTagField` Boolean (optional) _macOS_ - Show the tags input box,
    defaults to `true`.
-  * `properties` String[] (optional)
+  * `properties` String[]&#32;(optional)
    * `showHiddenFiles` - Show hidden files in dialog.
    * `createDirectory` _macOS_ - Allow creating new directories from dialog.
    * `treatPackageAsDirectory` _macOS_ - Treat packages, such as `.app` folders,
@@ -185,7 +185,7 @@ The `filters` specifies an array of file types that can be displayed, see

 * `browserWindow` [BrowserWindow](browser-window.md) (optional)
 * `options` Object
-  * `title` String (optional)
+  * `title` String (optional) - The dialog title. Cannot be displayed on some _Linux_ desktop environments.
  * `defaultPath` String (optional) - Absolute directory path, absolute file
    path, or file name to use by default.
  * `buttonLabel` String (optional) - Custom label for the confirmation button, when
@@ -195,7 +195,7 @@ The `filters` specifies an array of file types that can be displayed, see
  * `nameFieldLabel` String (optional) _macOS_ - Custom label for the text
    displayed in front of the filename text field.
  * `showsTagField` Boolean (optional) _macOS_ - Show the tags input box, defaults to `true`.
-  * `properties` String[] (optional)
+  * `properties` String[]&#32;(optional)
    * `showHiddenFiles` - Show hidden files in dialog.
    * `createDirectory` _macOS_ - Allow creating new directories from dialog.
    * `treatPackageAsDirectory` _macOS_ - Treat packages, such as `.app` folders,
@@ -205,9 +205,10 @@ The `filters` specifies an array of file types that can be displayed, see
  * `securityScopedBookmarks` Boolean (optional) _macOS_ _mas_ - Create a [security scoped bookmark](https://developer.apple.com/library/content/documentation/Security/Conceptual/AppSandboxDesignGuide/AppSandboxInDepth/AppSandboxInDepth.html#//apple_ref/doc/uid/TP40011183-CH3-SW16) when packaged for the Mac App Store. If this option is enabled and the file doesn't already exist a blank file will be created at the chosen path.

 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. (For return values, see [table here](#bookmarks-array).)
+
+* `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. (For return values, see [table here](#bookmarks-array).)

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

@@ -221,16 +222,16 @@ expanding and collapsing the dialog.

 * `browserWindow` [BrowserWindow](browser-window.md) (optional)
 * `options` Object
+  * `message` String - Content of the message box.
  * `type` String (optional) - Can be `"none"`, `"info"`, `"error"`, `"question"` or
  `"warning"`. On Windows, `"question"` displays the same icon as `"info"`, unless
  you set an icon using the `"icon"` option. On macOS, both `"warning"` and
  `"error"` display the same warning icon.
-  * `buttons` String[] (optional) - Array of texts for buttons. On Windows, an empty array
+  * `buttons` String[]&#32;(optional) - Array of texts for buttons. On Windows, an empty array
    will result in one button labeled "OK".
  * `defaultId` Integer (optional) - Index of the button in the buttons array which will
    be selected by default when the message box opens.
  * `title` String (optional) - Title of the message box, some platforms will not show it.
-  * `message` String - Content of the message box.
  * `detail` String (optional) - Extra information of the message.
  * `checkboxLabel` String (optional) - If provided, the message box will
    include a checkbox with the given label.
@@ -267,16 +268,16 @@ If `browserWindow` is not shown dialog will not be attached to it. In such case

 * `browserWindow` [BrowserWindow](browser-window.md) (optional)
 * `options` Object
+  * `message` String - Content of the message box.
  * `type` String (optional) - Can be `"none"`, `"info"`, `"error"`, `"question"` or
  `"warning"`. On Windows, `"question"` displays the same icon as `"info"`, unless
  you set an icon using the `"icon"` option. On macOS, both `"warning"` and
  `"error"` display the same warning icon.
-  * `buttons` String[] (optional) - Array of texts for buttons. On Windows, an empty array
+  * `buttons` String[]&#32;(optional) - Array of texts for buttons. On Windows, an empty array
    will result in one button labeled "OK".
  * `defaultId` Integer (optional) - Index of the button in the buttons array which will
    be selected by default when the message box opens.
  * `title` String (optional) - Title of the message box, some platforms will not show it.
-  * `message` String - Content of the message box.
  * `detail` String (optional) - Extra information of the message.
  * `checkboxLabel` String (optional) - If provided, the message box will
    include a checkbox with the given label.
@@ -302,8 +303,9 @@ If `browserWindow` is not shown dialog will not be attached to it. In such case
    via `Alt-W` on Windows and Linux.

 Returns `Promise<Object>` - resolves with a promise containing the following properties:
-  * `response` Number - The index of the clicked button.
-  * `checkboxChecked` Boolean - The checked state of the checkbox if
+
+* `response` Number - The index of the clicked button.
+* `checkboxChecked` Boolean - The checked state of the checkbox if
  `checkboxLabel` was set. Otherwise `false`.

 Shows a message box.
--- a/docs/api/environment-variables.md
+++ b/docs/api/environment-variables.md
@@ -105,6 +105,7 @@ Don't use the global menu bar on Linux.
 Set the trash implementation on Linux. Default is `gio`.

 Options:
+
 * `gvfs-trash`
 * `trash-cli`
 * `kioclient5`
@@ -115,7 +116,6 @@ Options:
 The following environment variables are intended primarily for development and
 debugging purposes.

-
 ### `ELECTRON_ENABLE_LOGGING`

 Prints Chrome's internal logging to the console.
--- a/docs/api/extensions.md
+++ b/docs/api/extensions.md
@@ -15,7 +15,7 @@ extension capabilities.

 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):
+[`ses.loadExtension`](session.md#sesloadextensionpath-options):

 ```js
 const { session } = require('electron')
@@ -115,3 +115,9 @@ The following methods of `chrome.management` are supported:
 - `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
@@ -12,7 +12,6 @@ options on the [`BrowserWindow`](browser-window.md) class.
 To create a frameless window, you need to set `frame` to `false` in
 [BrowserWindow](browser-window.md)'s `options`:

-
 ```javascript
 const { BrowserWindow } = require('electron')
 const win = new BrowserWindow({ width: 800, height: 600, frame: false })
@@ -83,12 +82,15 @@ win.show()
 * The `blur` filter only applies to the web page, so there is no way to apply
  blur effect to the content below the window (i.e. other applications open on
  the user's system).
-* On Windows operating systems, transparent windows will not work when DWM is
+* The window will not be transparent when DevTools is opened.
+* On Windows operating systems,
+  * transparent windows will not work when DWM is
  disabled.
+  * transparent windows can not be maximized using the Windows system menu or by double clicking the title bar. The reasoning behind this can be seen on [this pull request](https://github.com/electron/electron/pull/28207).
 * On Linux, users have to put `--enable-transparent-visuals --disable-gpu` in
  the command line to disable GPU and allow ARGB to make transparent window,
  this is caused by an upstream bug that [alpha channel doesn't work on some
-  NVidia drivers](https://code.google.com/p/chromium/issues/detail?id=369209) on
+  NVidia drivers](https://bugs.chromium.org/p/chromium/issues/detail?id=369209) on
  Linux.
 * On Mac, the native window shadow will not be shown on a transparent window.

--- a/docs/api/global-shortcut.md
+++ b/docs/api/global-shortcut.md
@@ -9,7 +9,7 @@ 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
--- a/docs/api/ipc-main.md
+++ b/docs/api/ipc-main.md
@@ -91,7 +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[]

@@ -123,7 +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
@@ -61,9 +61,13 @@ Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will no
 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.
@@ -85,14 +89,19 @@ Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will no
 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).

 For example:
+
 ```javascript
 // Renderer process
 ipcRenderer.invoke('some-name', someArgument).then((result) => {
@@ -123,9 +132,13 @@ Algorithm][SCA], just like [`window.postMessage`][], so prototype chains will no
 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`.
@@ -149,6 +162,7 @@ The transferred `MessagePort` objects will be available in the main process as
 property of the emitted event.

 For example:
+
 ```js
 // Renderer process
 const { port1, port2 } = new MessageChannel()
--- a/docs/api/locales.md
+++ b/docs/api/locales.md
@@ -1,142 +0,0 @@
-# Locales
-
-> Locale values returned by `app.getLocale()`.
-
-Electron uses Chromium's `l10n_util` library to fetch the locale. Possible
-values are listed below:
-
-| Language Code | Language Name |
-|---------------|---------------|
-| af | Afrikaans |
-| am | Amharic |
-| ar | Arabic |
-| az | Azerbaijani |
-| be | Belarusian |
-| bg | Bulgarian |
-| bh | Bihari |
-| bn | Bengali |
-| br | Breton |
-| bs | Bosnian |
-| ca | Catalan |
-| co | Corsican |
-| cs | Czech |
-| cy | Welsh |
-| da | Danish |
-| de | German |
-| de-AT | German (Austria) |
-| de-CH | German (Switzerland) |
-| de-DE | German (Germany) |
-| el | Greek |
-| en | English |
-| en-AU | English (Australia) |
-| en-CA | English (Canada) |
-| en-GB | English (UK) |
-| en-NZ | English (New Zealand) |
-| en-US | English (US) |
-| en-ZA | English (South Africa) |
-| eo | Esperanto |
-| es | Spanish |
-| es-419 | Spanish (Latin America) |
-| et | Estonian |
-| eu | Basque |
-| fa | Persian |
-| fi | Finnish |
-| fil | Filipino |
-| fo | Faroese |
-| fr | French |
-| fr-CA | French (Canada) |
-| fr-CH | French (Switzerland) |
-| fr-FR | French (France) |
-| fy | Frisian |
-| ga | Irish |
-| gd | Scots Gaelic |
-| gl | Galician |
-| gn | Guarani |
-| gu | Gujarati |
-| ha | Hausa |
-| haw | Hawaiian |
-| he | Hebrew |
-| hi | Hindi |
-| hr | Croatian |
-| hu | Hungarian |
-| hy | Armenian |
-| ia | Interlingua |
-| id | Indonesian |
-| is | Icelandic |
-| it | Italian |
-| it-CH | Italian (Switzerland) |
-| it-IT | Italian (Italy) |
-| ja | Japanese |
-| jw | Javanese |
-| ka | Georgian |
-| kk | Kazakh |
-| km | Cambodian |
-| kn | Kannada |
-| ko | Korean |
-| ku | Kurdish |
-| ky | Kyrgyz |
-| la | Latin |
-| ln | Lingala |
-| lo | Laothian |
-| lt | Lithuanian |
-| lv | Latvian |
-| mk | Macedonian |
-| ml | Malayalam |
-| mn | Mongolian |
-| mo | Moldavian |
-| mr | Marathi |
-| ms | Malay |
-| mt | Maltese |
-| nb | Norwegian (Bokmal) |
-| ne | Nepali |
-| nl | Dutch |
-| nn | Norwegian (Nynorsk) |
-| no | Norwegian |
-| oc | Occitan |
-| om | Oromo |
-| or | Oriya |
-| pa | Punjabi |
-| pl | Polish |
-| ps | Pashto |
-| pt | Portuguese |
-| pt-BR | Portuguese (Brazil) |
-| pt-PT | Portuguese (Portugal) |
-| qu | Quechua |
-| rm | Romansh |
-| ro | Romanian |
-| ru | Russian |
-| sd | Sindhi |
-| sh | Serbo-Croatian |
-| si | Sinhalese |
-| sk | Slovak |
-| sl | Slovenian |
-| sn | Shona |
-| so | Somali |
-| sq | Albanian |
-| sr | Serbian |
-| st | Sesotho |
-| su | Sundanese |
-| sv | Swedish |
-| sw | Swahili |
-| ta | Tamil |
-| te | Telugu |
-| tg | Tajik |
-| th | Thai |
-| ti | Tigrinya |
-| tk | Turkmen |
-| to | Tonga |
-| tr | Turkish |
-| tt | Tatar |
-| tw | Twi |
-| ug | Uighur |
-| uk | Ukrainian |
-| ur | Urdu |
-| uz | Uzbek |
-| vi | Vietnamese |
-| xh | Xhosa |
-| yi | Yiddish |
-| yo | Yoruba |
-| zh | Chinese |
-| zh-CN | Chinese (Simplified) |
-| zh-TW | Chinese (Traditional) |
-| zu | Zulu |
--- a/docs/api/menu-item.md
+++ b/docs/api/menu-item.md
@@ -14,7 +14,7 @@ See [`Menu`](menu.md) for examples.
    * `menuItem` MenuItem
    * `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`, `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`, `shareMenu`, `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`.
@@ -31,6 +31,7 @@ See [`Menu`](menu.md) for examples.
    menu items.
  * `registerAccelerator` Boolean (optional) _Linux_ _Windows_ - If false, the accelerator won't be registered
    with the system, but it will still be displayed. Defaults to true.
+  * `sharingItem` SharingItem (optional) _macOS_ - The item to share when the `role` is `shareMenu`.
  * `submenu` (MenuItemConstructorOptions[] | [Menu](menu.md)) (optional) - Should be specified
    for `submenu` type menu items. If `submenu` is specified, the `type: 'submenu'` can be omitted.
    If the value is not a [`Menu`](menu.md) then it will be automatically converted to one using
@@ -87,6 +88,7 @@ The `role` property can have following values:
 * `resetZoom` - Reset the focused page's zoom level to the original size.
 * `zoomIn` - Zoom in the focused page by 10%.
 * `zoomOut` - Zoom out the focused page by 10%.
+* `toggleSpellChecker` - Enable/disable builtin spell checker.
 * `fileMenu` - Whole default "File" menu (Close / Quit)
 * `editMenu` - Whole default "Edit" menu (Undo, Copy, etc.).
 * `viewMenu` - Whole default "View" menu (Reload, Toggle Developer Tools, etc.)
@@ -112,6 +114,7 @@ The following additional roles are available on _macOS_:
 * `services` - The submenu is a ["Services"](https://developer.apple.com/documentation/appkit/nsapplication/1428608-servicesmenu?language=objc) menu. This is only intended for use in the Application Menu and is *not* the same as the "Services" submenu used in context menus in macOS apps, which is not implemented in Electron.
 * `recentDocuments` - The submenu is an "Open Recent" menu.
 * `clearRecentDocuments` - Map to the `clearRecentDocuments` action.
+* `shareMenu` - The submenu is [share menu][ShareMenu]. The `sharingItem` property must also be set to indicate the item to share.

 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.
@@ -136,6 +139,7 @@ A `String` indicating the item's visible label.

 A `Function` that is fired when the MenuItem receives a click event.
 It can be called with `menuItem.click(event, focusedWindow, focusedWebContents)`.
+
 * `event` [KeyboardEvent](structures/keyboard-event.md)
 * `focusedWindow` [BrowserWindow](browser-window.md)
 * `focusedWebContents` [WebContents](web-contents.md)
@@ -200,6 +204,12 @@ system or just displayed.

 This property can be dynamically changed.

+#### `menuItem.sharingItem` _macOS_
+
+A `SharingItem` indicating the item to share when the `role` is `shareMenu`.
+
+This property can be dynamically changed.
+
 #### `menuItem.commandId`

 A `Number` indicating an item's sequential unique id.
@@ -207,3 +217,5 @@ A `Number` indicating an item's sequential unique id.
 #### `menuItem.menu`

 A `Menu` that the item is a part of.
+
+[ShareMenu]: https://developer.apple.com/design/human-interface-guidelines/macos/extensions/share-extensions/
--- a/docs/api/menu.md
+++ b/docs/api/menu.md
@@ -1,3 +1,5 @@
+# Menu
+
 ## Class: Menu

 > Create native application menus and context menus.
--- a/docs/api/message-channel-main.md
+++ b/docs/api/message-channel-main.md
@@ -9,11 +9,15 @@ channel messaging.

 ## Class: MessageChannelMain

+> Channel interface for channel messaging in the main process.
+
 Process: [Main](../glossary.md#main-process)

 Example:
+
 ```js
 // Main process
+const { MessageChannelMain } = require('electron')
 const { port1, port2 } = new MessageChannelMain()
 w.webContents.postMessage('port', null, [port2])
 port1.postMessage({ some: 'message' })
--- a/docs/api/message-port-main.md
+++ b/docs/api/message-port-main.md
@@ -14,6 +14,8 @@ channel messaging.

 ## Class: MessagePortMain

+> Port interface for channel messaging in the main process.
+
 Process: [Main](../glossary.md#main-process)

 ### Instance Methods
--- a/docs/api/modernization/overview.md
+++ b/docs/api/modernization/overview.md
@@ -1,10 +0,0 @@
-## Modernization
-
-The Electron team is currently undergoing an initiative to modernize our API in a few concrete ways. These include: updating our modules to use idiomatic JS properties instead of separate `getPropertyX` and `setPropertyX`, converting callbacks to promises, and removing some other anti-patterns present in our APIs. The current status of the Promise initiative can be tracked in the [promisification](promisification.md) tracking file.
-
-As we work to perform these updates, we seek to create the least disruptive amount of change at any given time, so as many changes as possible will be introduced in a backward compatible manner and deprecated after enough time has passed to give users a chance to upgrade their API calls.
-
-This document and its child documents will be updated to reflect the latest status of our API changes.
-
-* [Promisification](promisification.md)
-* [Property Updates](property-updates.md)
--- a/docs/api/modernization/promisification.md
+++ b/docs/api/modernization/promisification.md
@@ -1,42 +0,0 @@
-## Promisification
-
-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)
- [contents.executeJavaScript(code[, userGesture, callback])](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#executeJavaScript)
- [contents.printToPDF(options, callback)](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#printToPDF)
- [contents.savePage(fullPath, saveType, callback)](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#savePage)
- [contentTracing.getCategories(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getCategories)
- [contentTracing.startRecording(options, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#startRecording)
- [contentTracing.stopRecording(resultFilePath, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#stopRecording)
- [contentTracing.getTraceBufferUsage(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getTraceBufferUsage)
- [cookies.flushStore(callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#flushStore)
- [cookies.get(filter, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#get)
- [cookies.remove(url, name, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#remove)
- [cookies.set(details, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#set)
- [debugger.sendCommand(method[, commandParams, callback])](https://github.com/electron/electron/blob/master/docs/api/debugger.md#sendCommand)
- [desktopCapturer.getSources(options, callback)](https://github.com/electron/electron/blob/master/docs/api/desktop-capturer.md#getSources)
- [dialog.showOpenDialog([browserWindow, ]options[, callback])](https://github.com/electron/electron/blob/master/docs/api/dialog.md#showOpenDialog)
- [dialog.showSaveDialog([browserWindow, ]options[, callback])](https://github.com/electron/electron/blob/master/docs/api/dialog.md#showSaveDialog)
- [inAppPurchase.purchaseProduct(productID, quantity, callback)](https://github.com/electron/electron/blob/master/docs/api/in-app-purchase.md#purchaseProduct)
- [inAppPurchase.getProducts(productIDs, callback)](https://github.com/electron/electron/blob/master/docs/api/in-app-purchase.md#getProducts)
- [dialog.showMessageBox([browserWindow, ]options[, callback])](https://github.com/electron/electron/blob/master/docs/api/dialog.md#showMessageBox)
- [dialog.showCertificateTrustDialog([browserWindow, ]options, callback)](https://github.com/electron/electron/blob/master/docs/api/dialog.md#showCertificateTrustDialog)
- [netLog.stopLogging([callback])](https://github.com/electron/electron/blob/master/docs/api/net-log.md#stopLogging)
- [protocol.isProtocolHandled(scheme, callback)](https://github.com/electron/electron/blob/master/docs/api/protocol.md#isProtocolHandled)
- [ses.clearHostResolverCache([callback])](https://github.com/electron/electron/blob/master/docs/api/session.md#clearHostResolverCache)
- [ses.clearStorageData([options, callback])](https://github.com/electron/electron/blob/master/docs/api/session.md#clearStorageData)
- [ses.setProxy(config, callback)](https://github.com/electron/electron/blob/master/docs/api/session.md#setProxy)
- [ses.resolveProxy(url, callback)](https://github.com/electron/electron/blob/master/docs/api/session.md#resolveProxy)
- [ses.getCacheSize(callback)](https://github.com/electron/electron/blob/master/docs/api/session.md#getCacheSize)
- [ses.clearAuthCache(options[, callback])](https://github.com/electron/electron/blob/master/docs/api/session.md#clearAuthCache)
- [ses.clearCache(callback)](https://github.com/electron/electron/blob/master/docs/api/session.md#clearCache)
- [ses.getBlobData(identifier, callback)](https://github.com/electron/electron/blob/master/docs/api/session.md#getBlobData)
- [shell.openExternal(url[, options, callback])](https://github.com/electron/electron/blob/master/docs/api/shell.md#openExternal)
- [webFrame.executeJavaScript(code[, userGesture, callback])](https://github.com/electron/electron/blob/master/docs/api/web-frame.md#executeJavaScript)
- [webFrame.executeJavaScriptInIsolatedWorld(worldId, scripts[, userGesture, callback])](https://github.com/electron/electron/blob/master/docs/api/web-frame.md#executeJavaScriptInIsolatedWorld)
- [webviewTag.capturePage([rect, ]callback)](https://github.com/electron/electron/blob/master/docs/api/webview-tag.md#capturePage)
- [webviewTag.executeJavaScript(code[, userGesture, callback])](https://github.com/electron/electron/blob/master/docs/api/webview-tag.md#executeJavaScript)
- [webviewTag.printToPDF(options, callback)](https://github.com/electron/electron/blob/master/docs/api/webview-tag.md#printToPDF)
- [win.capturePage([rect, ]callback)](https://github.com/electron/electron/blob/master/docs/api/browser-window.md#capturePage)
--- a/docs/api/modernization/property-updates.md
+++ b/docs/api/modernization/property-updates.md
@@ -1,41 +0,0 @@
-## Property Updates
-
-The Electron team is currently undergoing an initiative to convert separate getter and setter functions in Electron to bespoke properties with `get` and `set` functionality. During this transition period, both the new properties and old getters and setters of these functions will work correctly and be documented.
-
-## Candidates
-
-* `BrowserWindow`
-  * `menubarVisible`
-* `crashReporter` module
-  * `uploadToServer`
-* `webFrame` modules
-  * `zoomFactor`
-  * `zoomLevel`
-  * `audioMuted`
-* `<webview>`
-  * `zoomFactor`
-  * `zoomLevel`
-  * `audioMuted`
-
-## Converted Properties
-
-* `app` module
-  * `accessibilitySupport`
-  * `applicationMenu`
-  * `badgeCount`
-  * `name`
-* `DownloadItem` class
-  * `savePath`
-* `BrowserWindow` module
-  * `autoHideMenuBar`
-  * `resizable`
-  * `maximizable`
-  * `minimizable`
-  * `fullscreenable`
-  * `movable`
-  * `closable`
-  * `backgroundThrottling`
-* `NativeImage`
-  * `isMacTemplateImage`
-* `SystemPreferences` module
-  * `appLevelAppearance`
--- a/docs/api/native-theme.md
+++ b/docs/api/native-theme.md
@@ -34,6 +34,7 @@ Setting this property to `system` will remove the override and
 everything will be reset to the OS default.  By default `themeSource` is `system`.

 Settings this property to `dark` will have the following effects:
+
 * `nativeTheme.shouldUseDarkColors` will be `true` when accessed
 * Any UI Electron renders on Linux and Windows including context menus, devtools, etc. will use the dark UI.
 * Any UI the OS renders on macOS including menus, window frames, etc. will use the dark UI.
@@ -41,6 +42,7 @@ Settings this property to `dark` will have the following effects:
 * The `updated` event will be emitted

 Settings this property to `light` will have the following effects:
+
 * `nativeTheme.shouldUseDarkColors` will be `false` when accessed
 * Any UI Electron renders on Linux and Windows including context menus, devtools, etc. will use the light UI.
 * Any UI the OS renders on macOS including menus, window frames, etc. will use the light UI.
@@ -49,6 +51,7 @@ Settings this property to `light` will have the following effects:

 The usage of this property should align with a classic "dark mode" state machine in your application
 where the user has three options.
+
 * `Follow OS` --> `themeSource = 'system'`
 * `Dark Mode` --> `themeSource = 'dark'`
 * `Light Mode` --> `themeSource = 'light'`
--- a/docs/api/net.md
+++ b/docs/api/net.md
@@ -8,7 +8,7 @@ The `net` module is a client-side API for issuing HTTP(S) requests. It is
 similar to the [HTTP](https://nodejs.org/api/http.html) and
 [HTTPS](https://nodejs.org/api/https.html) modules of Node.js but uses
 Chromium's native networking library instead of the Node.js implementation,
-offering better support for web proxies.
+offering better support for web proxies. It also supports checking network status.

 The following is a non-exhaustive list of why you may consider using the `net`
 module instead of the native Node.js modules:
@@ -62,3 +62,25 @@ Creates a [`ClientRequest`](./client-request.md) instance using the provided
 `options` which are directly forwarded to the `ClientRequest` constructor.
 The `net.request` method would be used to issue both secure and insecure HTTP
 requests according to the specified protocol scheme in the `options` object.
+
+### `net.isOnline()`
+
+Returns `Boolean` - Whether there is currently internet connection.
+
+A return value of `false` is a pretty strong indicator that the user
+won't be able to connect to remote sites. However, a return value of
+`true` is inconclusive; even if some link is up, it is uncertain
+whether a particular connection attempt to a particular remote site
+will be successful.
+
+## Properties
+
+### `net.online` _Readonly_
+
+A `Boolean` property. Whether there is currently internet connection.
+
+A return value of `false` is a pretty strong indicator that the user
+won't be able to connect to remote sites. However, a return value of
+`true` is inconclusive; even if some link is up, it is uncertain
+whether a particular connection attempt to a particular remote site
+will be successful.
--- a/docs/api/power-monitor.md
+++ b/docs/api/power-monitor.md
@@ -65,3 +65,18 @@ before considered idle.  `locked` is available on supported systems only.
 Returns `Integer` - Idle time in seconds

 Calculate system idle time in seconds.
+
+### `powerMonitor.isOnBatteryPower()`
+
+Returns `Boolean` - Whether the system is on battery power.
+
+To monitor for changes in this property, use the `on-battery` and `on-ac`
+events.
+
+## Properties
+
+### `powerMonitor.onBatteryPower`
+
+A `Boolean` property. True if the system is on battery power.
+
+See [`powerMonitor.isOnBatteryPower()`](#powermonitorisonbatterypower).
--- a/docs/api/process.md
+++ b/docs/api/process.md
@@ -11,6 +11,7 @@ It adds the following events, properties, and methods:
 ## Sandbox

 In sandboxed renderers the `process` object contains only a subset of the APIs:
+
 - `crash()`
 - `hang()`
 - `getCreationTime()`
@@ -41,19 +42,6 @@ In sandboxed renderers the `process` object contains only a subset of the APIs:
 Emitted when Electron has loaded its internal initialization script and is
 beginning to load the web page or the main script.

-It can be used by the preload script to add removed Node global symbols back to
-the global scope when node integration is turned off:
-
-```javascript
-// preload.js
-const _setImmediate = setImmediate
-const _clearImmediate = clearImmediate
-process.once('loaded', () => {
-  global.setImmediate = _setImmediate
-  global.clearImmediate = _clearImmediate
-})
-```
-
 ## Properties

 ### `process.defaultApp` _Readonly_
@@ -104,6 +92,7 @@ A `Boolean` that controls whether or not deprecations printed to `stderr` includ
 This property is instead of the `--trace-deprecation` command line flag.

 ### `process.traceProcessWarnings`
+
 A `Boolean` that controls whether or not process warnings printed to `stderr` include
 their stack trace. Setting this to `true` will print stack traces for process warnings
 (including deprecations). This property is instead of the `--trace-warnings` command
--- a/docs/api/remote.md
+++ b/docs/api/remote.md
@@ -35,6 +35,7 @@ win.loadURL('https://github.com')
 you can use [webContents.executeJavaScript](web-contents.md#contentsexecutejavascriptcode-usergesture).

 **Note:** The remote module can be disabled for security reasons in the following contexts:
+
 - [`BrowserWindow`](browser-window.md) - by setting the `enableRemoteModule` option to `false`.
 - [`<webview>`](webview-tag.md) - by setting the `enableremotemodule` attribute to `false`.

@@ -207,7 +208,6 @@ module.exports = 'bar'
 const foo = require('electron').remote.require('./foo') // bar
 ```

-
 ### `remote.process` _Readonly_

 A `NodeJS.Process` object.  The `process` object in the main process. This is the same as
--- a/docs/api/sandbox-option.md
+++ b/docs/api/sandbox-option.md
@@ -1,182 +0,0 @@
-# `sandbox` Option
-
-> Create a browser window with a sandboxed renderer. With this
-option enabled, the renderer must communicate via IPC to the main process in order to access node APIs.
-
-One of the key security features of Chromium is that all blink rendering/JavaScript
-code is executed within a sandbox. This sandbox uses OS-specific features to ensure
-that exploits in the renderer process cannot harm the system.
-
-In other words, when the sandbox is enabled, the renderers can only make changes
-to the system by delegating tasks to the main process via IPC.
-[Here's](https://www.chromium.org/developers/design-documents/sandbox) more
-information about the sandbox.
-
-Since a major feature in Electron is the ability to run Node.js in the
-renderer process (making it easier to develop desktop applications using web
-technologies), the sandbox is disabled by electron. This is because
-most Node.js APIs require system access. `require()` for example, is not
-possible without file system permissions, which are not available in a sandboxed
-environment.
-
-Usually this is not a problem for desktop applications since the code is always
-trusted, but it makes Electron less secure than Chromium for displaying
-untrusted web content. For applications that require more security, the
-`sandbox` flag will force Electron to spawn a classic Chromium renderer that is
-compatible with the sandbox.
-
-A sandboxed renderer doesn't have a Node.js environment running and doesn't
-expose Node.js JavaScript APIs to client code. The only exception is the preload script,
-which has access to a subset of the Electron renderer API.
-
-Another difference is that sandboxed renderers don't modify any of the default
-JavaScript APIs. Consequently, some APIs such as `window.open` will work as they
-do in Chromium (i.e. they do not return a [`BrowserWindowProxy`](browser-window-proxy.md)).
-
-## Example
-
-To create a sandboxed window, pass `sandbox: true` to `webPreferences`:
-
-```js
-let win
-app.whenReady().then(() => {
-  win = new BrowserWindow({
-    webPreferences: {
-      sandbox: true
-    }
-  })
-  win.loadURL('http://google.com')
-})
-```
-
-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 behavior (by default Electron creates a [`BrowserWindow`](browser-window.md)
-and returns a proxy to this via `window.open`).
-
-[`app.enableSandbox`](app.md#appenablesandbox) can be used to force `sandbox: true` for all `BrowserWindow` instances.
-
-```js
-let win
-app.enableSandbox()
-app.whenReady().then(() => {
-  // no need to pass `sandbox: true` since `app.enableSandbox()` was called.
-  win = new BrowserWindow()
-  win.loadURL('http://google.com')
-})
-```
-
-## Preload
-
-An app can make customizations to sandboxed renderers using a preload script.
-Here's an example:
-
-```js
-let win
-app.whenReady().then(() => {
-  win = new BrowserWindow({
-    webPreferences: {
-      sandbox: true,
-      preload: path.join(app.getAppPath(), 'preload.js')
-    }
-  })
-  win.loadURL('http://google.com')
-})
-```
-
-and preload.js:
-
-```js
-// This file is loaded whenever a javascript context is created. It runs in a
-// private scope that can access a subset of Electron renderer APIs. Without
-// contextIsolation enabled, it's possible to accidentally leak privileged
-// globals like ipcRenderer to web content.
-const { ipcRenderer } = require('electron')
-
-const defaultWindowOpen = window.open
-
-window.open = function customWindowOpen (url, ...args) {
-  ipcRenderer.send('report-window-open', location.origin, url, args)
-  return defaultWindowOpen(url + '?from_electron=1', ...args)
-}
-```
-
-Important things to notice in the preload script:
-
- Even though the sandboxed renderer doesn't have Node.js running, it still has
-  access to a limited node-like environment: `Buffer`, `process`, `setImmediate`,
-  `clearImmediate` and `require` are available.
- The preload script must be contained in a single script, but it is possible to have
-  complex preload code composed with multiple modules by using a tool like
-  webpack or browserify. An example of using browserify is below.
-
-To create a browserify bundle and use it as a preload script, something like
-the following should be used:
-
-```sh
-  browserify preload/index.js \
-    -x electron \
-    --insert-global-vars=__filename,__dirname -o preload.js
-```
-
-The `-x` flag should be used with any required module that is already exposed in
-the preload scope, and tells browserify to use the enclosing `require` function
-for it. `--insert-global-vars` will ensure that `process`, `Buffer` and
-`setImmediate` are also taken from the enclosing scope(normally browserify
-injects code for those).
-
-Currently the `require` function provided in the preload scope exposes the
-following modules:
-
- `electron`
-  - `crashReporter`
-  - `desktopCapturer`
-  - `ipcRenderer`
-  - `nativeImage`
-  - `webFrame`
- `events`
- `timers`
- `url`
-
-More may be added as needed to expose more Electron APIs in the sandbox.
-
-## 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 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/session.md
+++ b/docs/api/session.md
@@ -100,10 +100,11 @@ Returns:

 Emitted after an extension is loaded. This occurs whenever an extension is
 added to the "enabled" set of extensions. This includes:
+
 - Extensions being loaded from `Session.loadExtension`.
 - Extensions being reloaded:
-   * from a crash.
-   * if the extension requested it ([`chrome.runtime.reload()`](https://developer.chrome.com/extensions/runtime#method-reload)).
+  * from a crash.
+  * if the extension requested it ([`chrome.runtime.reload()`](https://developer.chrome.com/extensions/runtime#method-reload)).

 #### Event: 'extension-unloaded'

@@ -283,6 +284,27 @@ Writes any unwritten DOMStorage data to disk.
 #### `ses.setProxy(config)`

 * `config` Object
+  * `mode` String (optional) - The proxy mode. Should be one of `direct`,
+    `auto_detect`, `pac_script`, `fixed_servers` or `system`. If it's
+    unspecified, it will be automatically determined based on other specified
+    options.
+    * `direct`
+      In direct mode all connections are created directly, without any proxy involved.
+    * `auto_detect`
+      In auto_detect mode the proxy configuration is determined by a PAC script that can
+      be downloaded at http://wpad/wpad.dat.
+    * `pac_script`
+      In pac_script mode the proxy configuration is determined by a PAC script that is
+      retrieved from the URL specified in the `pacScript`. This is the default mode
+      if `pacScript` is specified.
+    * `fixed_servers`
+      In fixed_servers mode the proxy configuration is specified in `proxyRules`.
+      This is the default mode if `proxyRules` is specified.
+    * `system`
+      In system mode the proxy configuration is taken from the operating system.
+      Note that the system mode is different from setting no proxy configuration.
+      In the latter case, Electron falls back to the system settings
+      only if no command-line options influence the proxy configuration.
  * `pacScript` String (optional) - The URL associated with the PAC file.
  * `proxyRules` String (optional) - Rules indicating which proxies to use.
  * `proxyBypassRules` String (optional) - Rules indicating which URLs should
@@ -292,7 +314,7 @@ Returns `Promise<void>` - Resolves when the proxy setting process is complete.

 Sets the proxy settings.

-When `pacScript` and `proxyRules` are provided together, the `proxyRules`
+When `mode` is unspecified, `pacScript` and `proxyRules` are provided together, the `proxyRules`
 option is ignored and `pacScript` configuration is applied.

 You may need `ses.closeAllConnections` to close currently in flight connections to prevent
@@ -333,7 +355,7 @@ The `proxyBypassRules` is a comma separated list of rules described below:
     "foobar.com", "*foobar.com", "*.foobar.com", "*foobar.com:99",
     "https://x.*.y.com:99"

- * `"." HOSTNAME_SUFFIX_PATTERN [ ":" PORT ]`
+* `"." HOSTNAME_SUFFIX_PATTERN [ ":" PORT ]`

   Match a particular domain suffix.

@@ -366,6 +388,10 @@ The `proxyBypassRules` is a comma separated list of rules described below:

 Returns `Promise<String>` - Resolves with the proxy information for `url`.

+#### `ses.forceReloadProxyConfig()`
+
+Returns `Promise<void>` - Resolves when the all internal states of proxy service is reset and the latest proxy configuration is reapplied if it's already available. The pac script will be fetched from `pacScript` again if the proxy mode is `pac_script`.
+
 #### `ses.setDownloadPath(path)`

 * `path` String - The download location.
@@ -429,7 +455,7 @@ the original network configuration.
    * `errorCode` Integer - Error code.
  * `callback` Function
    * `verificationResult` Integer - Value can be one of certificate error codes
-    from [here](https://code.google.com/p/chromium/codesearch#chromium/src/net/base/net_error_list.h).
+    from [here](https://source.chromium.org/chromium/chromium/src/+/master:net/base/net_error_list.h).
    Apart from the certificate error codes, the following special codes can be used.
      * `0` - Indicates success and disables Certificate Transparency verification.
      * `-2` - Indicates failure.
@@ -457,12 +483,16 @@ win.webContents.session.setCertificateVerifyProc((request, callback) => {
 })
 ```

+> **NOTE:** The result of this procedure is cached by the network service.
+
 #### `ses.setPermissionRequestHandler(handler)`

 * `handler` Function | null
  * `webContents` [WebContents](web-contents.md) - WebContents requesting the permission.  Please note that if the request comes from a subframe you should use `requestingUrl` to check the request origin.
  * `permission` String - The type of requested permission.
+    * `clipboard-read` - Request access to read from the clipboard.
    * `media` -  Request access to media devices such as camera, microphone and speakers.
+    * `display-capture` - Request access to capture the screen.
    * `mediaKeySystem` - Request access to DRM protected content.
    * `geolocation` - Request access to user's current location.
    * `notifications` - Request notification creation and the ability to display them in the user's system tray.
@@ -497,7 +527,7 @@ 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 - Type of permission check.  Valid values are `midiSysex`, `notifications`, `geolocation`, `media`,`mediaKeySystem`,`midi`, `pointerLock`, `fullscreen`, `openExternal`, or `serial`.
  * `requestingOrigin` String - The origin URL of the permission check
@@ -574,11 +604,20 @@ Returns `String` - The user agent for this session.
 #### `ses.setSSLConfig(config)`

 * `config` Object
-  * `minVersion` String - Can be `tls1`, `tls1.1`, `tls1.2` or `tls1.3`. The
+  * `minVersion` String (optional) - Can be `tls1`, `tls1.1`, `tls1.2` or `tls1.3`. The
    minimum SSL version to allow when connecting to remote servers. Defaults to
    `tls1`.
-  * `maxVersion` String - Can be `tls1.2` or `tls1.3`. The maximum SSL version
+  * `maxVersion` String (optional) - Can be `tls1.2` or `tls1.3`. The maximum SSL version
    to allow when connecting to remote servers. Defaults to `tls1.3`.
+  * `disabledCipherSuites` Integer[] (optional) - List of cipher suites which
+    should be explicitly prevented from being used in addition to those
+    disabled by the net built-in policy.
+    Supported literal forms: 0xAABB, where AA is `cipher_suite[0]` and BB is
+    `cipher_suite[1]`, as defined in RFC 2246, Section 7.4.1.2. Unrecognized but
+    parsable cipher suites in this form will not return an error.
+    Ex: To disable TLS_RSA_WITH_RC4_128_MD5, specify 0x0004, while to
+    disable TLS_ECDH_ECDSA_WITH_RC4_128_SHA, specify 0xC002.
+    Note that TLSv1.3 ciphers cannot be disabled using this mechanism.

 Sets the SSL configuration for the session. All subsequent network requests
 will use the new configuration. Existing network connections (such as WebSocket
@@ -637,6 +676,16 @@ this session just before normal `preload` scripts run.
 Returns `String[]` an array of paths to preload scripts that have been
 registered.

+#### `ses.setSpellCheckerEnabled(enable)`
+
+* `enable` Boolean
+
+Sets whether to enable the builtin spell checker.
+
+#### `ses.isSpellCheckerEnabled()`
+
+Returns `Boolean` - Whether the builtin spell checker is enabled.
+
 #### `ses.setSpellCheckerLanguages(languages)`

 * `languages` String[] - An array of language codes to enable the spellchecker for.
@@ -694,9 +743,13 @@ 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)`
+#### `ses.loadExtension(path[, options])`

 * `path` String - Path to a directory containing an unpacked Chrome extension
+* `options` Object (optional)
+  * `allowFileAccess` Boolean - Whether to allow the extension to read local files over `file://`
+    protocol and inject content scripts into `file://` pages. This is required e.g. for loading
+    devtools extensions on `file://` URLs. Defaults to false.

 Returns `Promise<Extension>` - resolves when the extension is loaded.

@@ -719,7 +772,11 @@ const { app, session } = require('electron')
 const path = require('path')

 app.on('ready', async () => {
-  await session.defaultSession.loadExtension(path.join(__dirname, 'react-devtools'))
+  await session.defaultSession.loadExtension(
+    path.join(__dirname, 'react-devtools'),
+    // allowFileAccess is required to load the devtools extension on file:// URLs.
+    { allowFileAccess: true }
+  )
  // Note that in order to use the React DevTools extension, you'll need to
  // download and unzip a copy of the extension.
 })
@@ -767,6 +824,10 @@ The following properties are available on instances of `Session`:
 A `String[]` array which consists of all the known available spell checker languages.  Providing a language
 code to the `setSpellCheckerLanguages` API that isn't in this array will result in an error.

+#### `ses.spellCheckerEnabled`
+
+A `Boolean` indicating whether builtin spell checker is enabled.
+
 #### `ses.cookies` _Readonly_

 A [`Cookies`](cookies.md) object for this session.
--- a/docs/api/share-menu.md
+++ b/docs/api/share-menu.md
@@ -0,0 +1,47 @@
+# ShareMenu
+
+The `ShareMenu` class creates [Share Menu][share-menu] on macOS, which can be
+used to share information from the current context to apps, social media
+accounts, and other services.
+
+For including the share menu as a submenu of other menus, please use the
+`shareMenu` role of [`MenuItem`](menu-item.md).
+
+## Class: ShareMenu
+
+> Create share menu on macOS.
+
+Process: [Main](../glossary.md#main-process)
+
+### `new ShareMenu(sharingItem)`
+
+* `sharingItem` SharingItem - The item to share.
+
+Creates a new share menu.
+
+### Instance Methods
+
+The `shareMenu` object has the following instance methods:
+
+#### `shareMenu.popup([options])`
+
+* `options` PopupOptions (optional)
+  * `browserWindow` [BrowserWindow](browser-window.md) (optional) - Default is the focused window.
+  * `x` Number (optional) - Default is the current mouse cursor position.
+    Must be declared if `y` is declared.
+  * `y` Number (optional) - Default is the current mouse cursor position.
+    Must be declared if `x` is declared.
+  * `positioningItem` Number (optional) _macOS_ - The index of the menu item to
+    be positioned under the mouse cursor at the specified coordinates. Default
+    is -1.
+  * `callback` Function (optional) - Called when menu is closed.
+
+Pops up this menu as a context menu in the [`BrowserWindow`](browser-window.md).
+
+#### `shareMenu.closePopup([browserWindow])`
+
+* `browserWindow` [BrowserWindow](browser-window.md) (optional) - Default is the focused window.
+
+Closes the context menu in the `browserWindow`.
+
+[share-menu]: https://developer.apple.com/design/human-interface-guidelines/macos/extensions/share-extensions/
--- a/docs/api/structures/display.md
+++ b/docs/api/structures/display.md
@@ -10,9 +10,10 @@
 * `colorSpace` String -  represent a color space (three-dimensional object which contains all realizable color combinations) for the purpose of color conversions
 * `colorDepth` Number - The number of bits per pixel.
 * `depthPerComponent` Number - The number of bits per color component.
-* `bounds` [Rectangle](rectangle.md)
+* `displayFrequency` Number - The display refresh rate.
+* `bounds` [Rectangle](rectangle.md) - the bounds of the display in DIP points.
 * `size` [Size](size.md)
-* `workArea` [Rectangle](rectangle.md)
+* `workArea` [Rectangle](rectangle.md) - the work area of the display in DIP points.
 * `workAreaSize` [Size](size.md)
 * `internal` Boolean - `true` for an internal display and `false` for an external display

--- a/docs/api/structures/ipc-main-event.md
+++ b/docs/api/structures/ipc-main-event.md
@@ -1,8 +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
+* `senderFrame` WebFrameMain _Readonly_ - The frame that sent this 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
--- a/docs/api/structures/ipc-main-invoke-event.md
+++ b/docs/api/structures/ipc-main-invoke-event.md
@@ -1,4 +1,6 @@
 # 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
+* `senderFrame` WebFrameMain _Readonly_ - The frame that sent this message
--- a/docs/api/structures/ipc-renderer-event.md
+++ b/docs/api/structures/ipc-renderer-event.md
@@ -4,4 +4,4 @@
 * `senderId` Integer - The `webContents.id` that sent the message, you can call `event.sender.sendTo(event.senderId, ...)` to reply to the message, see [ipcRenderer.sendTo][ipc-renderer-sendto] for more information. This only applies to messages sent from a different renderer. Messages sent directly from the main process set `event.senderId` to `0`.
 * `ports` MessagePort[] - A list of MessagePorts that were transferred with this message

-[ipc-renderer-sendto]: #ipcrenderersendtowindowid-channel--arg1-arg2-
+[ipc-renderer-sendto]: ../ipc-renderer.md#ipcrenderersendtowebcontentsid-channel-args
--- a/docs/api/structures/jump-list-category.md
+++ b/docs/api/structures/jump-list-category.md
@@ -19,3 +19,7 @@
 property set then its `type` is assumed to be `tasks`. If the `name` property
 is set but the `type` property is omitted then the `type` is assumed to be
 `custom`.
+
+**Note:** The maximum length of a Jump List item's `description` property is
+260 characters. Beyond this limit, the item will not be added to the Jump
+List, nor will it be displayed.
--- a/docs/api/structures/jump-list-item.md
+++ b/docs/api/structures/jump-list-item.md
@@ -17,7 +17,7 @@
 * `title` String (optional) - The text to be displayed for the item in the Jump List.
  Should only be set if `type` is `task`.
 * `description` String (optional) - Description of the task (displayed in a tooltip).
-  Should only be set if `type` is `task`.
+  Should only be set if `type` is `task`. Maximum length 260 characters.
 * `iconPath` String (optional) - The absolute path to an icon to be displayed in a
  Jump List, which can be an arbitrary resource file that contains an icon
  (e.g. `.ico`, `.exe`, `.dll`). You can usually specify `process.execPath` to
--- a/docs/api/structures/new-window-web-contents-event.md
+++ b/docs/api/structures/new-window-web-contents-event.md
@@ -1,4 +1,3 @@
 # NewWindowWebContentsEvent Object extends `Event`

 * `newGuest` BrowserWindow (optional)
-
--- a/docs/api/structures/notification-response.md
+++ b/docs/api/structures/notification-response.md
@@ -0,0 +1,7 @@
+# NotificationResponse Object
+
+* `actionIdentifier` String - The identifier string of the action that the user selected.
+* `date` Number - The delivery date of the notification.
+* `identifier` String - The unique identifier for this notification request.
+* `userInfo` Record<String, any> - A dictionary of custom information associated with the notification.
+* `userText` String (optional) - The text entered or chosen by the user.
--- a/docs/api/structures/process-metric.md
+++ b/docs/api/structures/process-metric.md
@@ -11,7 +11,8 @@
  * `Pepper Plugin`
  * `Pepper Plugin Broker`
  * `Unknown`
-* `name` String (optional) - The name of the process. i.e. for plugins it might be Flash.
+* `serviceName` String (optional) - The non-localized name of the process.
+* `name` String (optional) - The name of the process.
    Examples for utility: `Audio Service`, `Content Decryption Module Service`, `Network Service`, `Video Capture`, etc.
 * `cpu` [CPUUsage](cpu-usage.md) - CPU usage of the process.
 * `creationTime` Number - Creation time for this process.
--- a/docs/api/structures/protocol-response.md
+++ b/docs/api/structures/protocol-response.md
@@ -28,7 +28,7 @@
 * `session` Session (optional) - The session used for requesting URL, by default
  the HTTP request will reuse the current session. Setting `session` to `null`
  would use a random independent session. This is only used for URL responses.
-* `uploadData` ProtocolResponseUploadData (optional) - The data used as upload data. This is only
+* `uploadData` [ProtocolResponseUploadData](protocol-response-upload-data.md) (optional) - The data used as upload data. This is only
  used for URL responses when `method` is `"POST"`.

-[net-error]: https://code.google.com/p/chromium/codesearch#chromium/src/net/base/net_error_list.h
+[net-error]: https://source.chromium.org/chromium/chromium/src/+/master:net/base/net_error_list.h
--- a/docs/api/structures/sharing-item.md
+++ b/docs/api/structures/sharing-item.md
@@ -0,0 +1,5 @@
+# SharingItem Object
+
+* `texts` String[] (optional) - An array of text to share.
+* `filePaths` String[] (optional) - An array of files to share.
+* `urls` String[] (optional) - An array of URLs to share.
--- a/docs/api/structures/upload-file.md
+++ b/docs/api/structures/upload-file.md
@@ -1,6 +1,6 @@
 # UploadFile Object

-* `type` String - `file`.
+* `type` 'file' - `file`.
 * `filePath` String - Path of file to be uploaded.
 * `offset` Integer - Defaults to `0`.
 * `length` Integer - Number of bytes to read from `offset`.
--- a/docs/api/structures/upload-raw-data.md
+++ b/docs/api/structures/upload-raw-data.md
@@ -1,4 +1,4 @@
 # UploadRawData Object

-* `type` String - `rawData`.
+* `type` 'rawData' - `rawData`.
 * `bytes` Buffer - Data to be uploaded.
--- a/docs/api/synopsis.md
+++ b/docs/api/synopsis.md
@@ -13,7 +13,7 @@ either process type.

 The basic rule is: if a module is [GUI][gui] or low-level system related, then
 it should be only available in the main process. You need to be familiar with
-the concept of [main process vs. renderer process](../tutorial/quick-start.md#main-and-renderer-processes)
+the concept of main process vs. renderer process
 scripts to be able to use those modules.

 The main process script is like a normal Node.js script:
@@ -43,8 +43,6 @@ extra ability to use node modules if `nodeIntegration` is enabled:
 </html>
 ```

-To run your app, read [Run your app](../tutorial/quick-start.md#run-your-application).
-
 ## Destructuring assignment

 As of 0.37, you can use
--- a/docs/api/system-preferences.md
+++ b/docs/api/system-preferences.md
@@ -51,8 +51,6 @@ Returns:

 Returns `Boolean` - Whether the system is in Dark Mode.

-**Note:** On macOS 10.15 Catalina in order for this API to return the correct value when in the "automatic" dark mode setting you must either have `NSRequiresAquaSystemAppearance=false` in your `Info.plist` or be on Electron `>=7.0.0`.  See the [dark mode guide](../tutorial/mojave-dark-mode-guide.md) for more information.
-
 **Deprecated:** Should use the new [`nativeTheme.shouldUseDarkColors`](native-theme.md#nativethemeshouldusedarkcolors-readonly) API.

 ### `systemPreferences.isSwipeTrackingFromScrollEventsEnabled()` _macOS_
@@ -132,6 +130,8 @@ This is necessary for events such as `NSUserDefaultsDidChangeNotification`.
  * `userInfo` Record<String, unknown>
  * `object` String

+Returns `Number` - The ID of this subscription
+
 Same as `subscribeNotification`, but uses `NSWorkspace.sharedWorkspace.notificationCenter`.
 This is necessary for events such as `NSWorkspaceDidActivateApplicationNotification`.

--- a/docs/api/touch-bar.md
+++ b/docs/api/touch-bar.md
@@ -1,3 +1,5 @@
+# TouchBar
+
 ## Class: TouchBar

 > Create TouchBar layouts for native macOS applications
--- a/docs/api/tray.md
+++ b/docs/api/tray.md
@@ -1,3 +1,5 @@
+# Tray
+
 ## Class: Tray

 > Add icons and context menus to the system's notification area.
@@ -52,12 +54,12 @@ app.whenReady().then(() => {
  appIcon.setContextMenu(contextMenu)
 })
 ```
+
 * On Windows it is recommended to use `ICO` icons to get best visual effects.

 If you want to keep exact same behaviors on all platforms, you should not
 rely on the `click` event and always attach a context menu to the tray icon.

-
 ### `new Tray(image, [guid])`

 * `image` ([NativeImage](native-image.md) | String)
--- a/docs/api/web-contents.md
+++ b/docs/api/web-contents.md
@@ -42,7 +42,28 @@ returns `null`.

 * `id` Integer

-Returns `WebContents` - A WebContents instance with the given ID.
+Returns `WebContents` | undefined - A WebContents instance with the given ID, or
+`undefined` if there is no WebContents associated with the given ID.
+
+### `webContents.fromDevToolsTargetId(targetId)`
+
+* `targetId` String - The Chrome DevTools Protocol [TargetID](https://chromedevtools.github.io/devtools-protocol/tot/Target/#type-TargetID) associated with the WebContents instance.
+
+Returns `WebContents` | undefined - A WebContents instance with the given TargetID, or
+`undefined` if there is no WebContents associated with the given TargetID.
+
+When communicating with the [Chrome DevTools Protocol](https://chromedevtools.github.io/devtools-protocol/),
+it can be useful to lookup a WebContents instance based on its assigned TargetID.
+
+```js
+async function lookupTargetId (browserWindow) {
+  const wc = browserWindow.webContents
+  await wc.debugger.attach('1.3')
+  const { targetInfo } = await wc.debugger.sendCommand('Target.getTargetInfo')
+  const { targetId } = targetInfo
+  const targetWebContents = await webContents.fromDevToolsTargetId(targetId)
+}
+```

 ## Class: WebContents

@@ -134,7 +155,7 @@ Returns:

 Emitted when page receives favicon urls.

-#### Event: 'new-window'
+#### Event: 'new-window' _Deprecated_

 Returns:

@@ -155,6 +176,8 @@ Returns:
  be set. If no post data is to be sent, the value will be `null`. Only defined
  when the window is being created by a form that set `target=_blank`.

+Deprecated in favor of [`webContents.setWindowOpenHandler`](web-contents.md#contentssetwindowopenhandlerhandler).
+
 Emitted when the page requests to open a new window for a `url`. It could be
 requested by `window.open` or an external link like `<a target='_blank'>`.

@@ -189,6 +212,39 @@ myBrowserWindow.webContents.on('new-window', (event, url, frameName, disposition
 })
 ```

+#### Event: 'did-create-window'
+
+Returns:
+* `window` BrowserWindow
+* `details` Object
+    * `url` String - URL for the created window.
+    * `frameName` String - Name given to the created window in the
+      `window.open()` call.
+    * `options` BrowserWindowConstructorOptions - The options used to create the
+      BrowserWindow. They are merged in increasing precedence: options inherited
+      from the parent, parsed options from the `features` string from
+      `window.open()`, and options given by
+      [`webContents.setWindowOpenHandler`](web-contents.md#contentssetwindowopenhandlerhandler).
+      Unrecognized options are not filtered out.
+    * `additionalFeatures` String[] - The non-standard features (features not
+      handled Chromium or Electron) _Deprecated_
+    * `referrer` [Referrer](structures/referrer.md) - The referrer that will be
+      passed to the new window. May or may not result in the `Referer` header
+      being sent, depending on the referrer policy.
+    * `postBody` [PostBody](structures/post-body.md) (optional) - The post data
+      that will be sent to the new window, along with the appropriate headers
+      that will be set. If no post data is to be sent, the value will be `null`.
+      Only defined when the window is being created by a form that set
+      `target=_blank`.
+    * `disposition` String - Can be `default`, `foreground-tab`,
+      `background-tab`, `new-window`, `save-to-disk` and `other`.
+
+Emitted _after_ successful creation of a window via `window.open` in the renderer.
+Not emitted if the creation of the window is canceled from
+[`webContents.setWindowOpenHandler`](web-contents.md#contentssetwindowopenhandlerhandler).
+
+See [`window.open()`](window-open.md) for more details and how to use this in conjunction with `webContents.setWindowOpenHandler`.
+
 #### Event: 'will-navigate'

 Returns:
@@ -366,6 +422,9 @@ Returns:
    * `oom` - Process ran out of memory
    * `launch-failed` - Process never successfully launched
    * `integrity-failure` - Windows code integrity checks failed
+  * `exitCode` Integer - The exit code of the process, unless `reason` is
+    `launch-failed`, in which case `exitCode` will be a platform-specific
+    launch failure error code.

 Emitted when the renderer process unexpectedly disappears.  This is normally
 because it was crashed or killed.
@@ -438,6 +497,7 @@ Emitted when the window leaves a full-screen state triggered by HTML API.
 #### Event: 'zoom-changed'

 Returns:
+
 * `event` Event
 * `zoomDirection` String - Can be `in` or `out`.

@@ -837,6 +897,19 @@ 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: 'preferred-size-changed'
+
+Returns:
+
+* `event` Event
+* `preferredSize` [Size](structures/size.md) - The minimum size needed to
+  contain the layout of the document—without requiring scrolling.
+
+Emitted when the `WebContents` preferred size has changed.
+
+This event will only be emitted when `enablePreferredSizeMode` is set to `true`
+in `webPreferences`.
+
 ### Instance Methods

 #### `contents.loadURL(url[, options])`
@@ -1109,6 +1182,23 @@ Works like `executeJavaScript` but evaluates `scripts` in an isolated context.

 Ignore application menu shortcuts while this web contents is focused.

+#### `contents.setWindowOpenHandler(handler)`
+
+* `handler` Function<{action: 'deny'} | {action: 'allow', overrideBrowserWindowOptions?: BrowserWindowConstructorOptions}>
+  * `details` Object
+    * `url` String - The _resolved_ version of the URL passed to `window.open()`. e.g. opening a window with `window.open('foo')` will yield something like `https://the-origin/the/current/path/foo`.
+    * `frameName` String - Name of the window provided in `window.open()`
+    * `features` String - Comma separated list of window features provided to `window.open()`.
+
+  Returns `{action: 'deny'} | {action: 'allow', overrideBrowserWindowOptions?: BrowserWindowConstructorOptions}` - `deny` cancels the creation of the new
+  window. `allow` will allow the new window to be created. Specifying `overrideBrowserWindowOptions` allows customization of the created window.
+  Returning an unrecognized value such as a null, undefined, or an object
+  without a recognized 'action' value will result in a console error and have
+  the same effect as returning `{action: 'deny'}`.
+
+Called before creating a window when `window.open()` is called from the
+renderer. See [`window.open()`](window-open.md) for more details and how to use this in conjunction with `did-create-window`.
+
 #### `contents.setAudioMuted(muted)`

 * `muted` Boolean
@@ -1236,8 +1326,7 @@ Inserts `text` to the focused element.
 * `text` String - Content to be searched, must not be empty.
 * `options` Object (optional)
  * `forward` Boolean (optional) - Whether to search forward or backward, defaults to `true`.
-  * `findNext` Boolean (optional) - Whether the operation is first request or a follow up,
-    defaults to `false`.
+  * `findNext` Boolean (optional) - Whether to begin a new text finding session with this request. Should be `true` for initial requests, and `false` for follow-up requests. Defaults to `false`.
  * `matchCase` Boolean (optional) - Whether search should be case-sensitive,
    defaults to `false`.

@@ -1592,8 +1681,7 @@ 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.
+> special Electron objects will throw an exception.

 The renderer process can handle the message by listening to `channel` with the
 [`ipcRenderer`](ipc-renderer.md) module.
@@ -1629,7 +1717,9 @@ app.whenReady().then(() => {

 #### `contents.sendToFrame(frameId, channel, ...args)`

-* `frameId` Integer
+* `frameId` Integer | [number, number] - the ID of the frame to send to, or a
+  pair of `[processId, frameId]` if the frame is in a different process to the
+  main frame.
 * `channel` String
 * `...args` any[]

@@ -1639,9 +1729,8 @@ Send an asynchronous message to a specific frame in a renderer process via
 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.

 The renderer process can handle the message by listening to `channel` with the
 [`ipcRenderer`](ipc-renderer.md) module.
@@ -1677,6 +1766,7 @@ process by accessing the `ports` property of the emitted event. When they
 arrive in the renderer, they will be native DOM `MessagePort` objects.

 For example:
+
 ```js
 // Main process
 const { port1, port2 } = new MessageChannelMain()
@@ -1803,7 +1893,7 @@ Returns `Boolean` - If *offscreen rendering* is enabled returns whether it is cu
 * `fps` Integer

 If *offscreen rendering* is enabled sets the frame rate to the specified number.
-Only values between 1 and 60 are accepted.
+Only values between 1 and 240 are accepted.

 #### `contents.getFrameRate()`

@@ -1901,7 +1991,7 @@ The zoom factor is the zoom percent divided by 100, so 300% = 3.0.
 #### `contents.frameRate`

 An `Integer` property that sets the frame rate of the web contents to the specified number.
-Only values between 1 and 60 are accepted.
+Only values between 1 and 240 are accepted.

 Only applicable if *offscreen rendering* is enabled.

--- a/docs/api/web-frame-main.md
+++ b/docs/api/web-frame-main.md
@@ -26,7 +26,7 @@ win.webContents.on(
 )
 ```

-You can also access frames of existing pages by using the `webFrame` property
+You can also access frames of existing pages by using the `mainFrame` property
 of [`WebContents`](web-contents.md).

 ```javascript
@@ -57,13 +57,14 @@ These methods can be accessed from the `webFrameMain` module:

 ### `webFrameMain.fromId(processId, routingId)`

-* `processId` Integer - An `Integer` representing the id of the process which owns the frame.
-* `routingId` Integer - An `Integer` representing the unique frame id in the
+* `processId` Integer - An `Integer` representing the internal ID of the process which owns the frame.
+* `routingId` Integer - An `Integer` representing the unique frame ID in the
  current renderer process. Routing IDs can be retrieved from `WebFrameMain`
  instances (`frame.routingId`) and are also passed by frame
  specific `WebContents` navigation events (e.g. `did-frame-navigate`).

-Returns `WebFrameMain` - A frame with the given process and routing IDs.
+Returns `WebFrameMain | undefined` - A frame with the given process and routing IDs,
+or `undefined` if there is no WebFrameMain associated with the given IDs.

 ## Class: WebFrameMain

@@ -89,6 +90,47 @@ this limitation.

 Returns `boolean` - Whether the reload was initiated successfully. Only results in `false` when the frame has no history.

+#### `frame.send(channel, ...args)`
+
+* `channel` String
+* `...args` any[]
+
+Send an asynchronous message to the renderer 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
+included. Sending Functions, Promises, Symbols, WeakMaps, or WeakSets will
+throw an exception.
+
+The renderer process can handle the message by listening to `channel` with the
+[`ipcRenderer`](ipc-renderer.md) module.
+
+#### `frame.postMessage(channel, message, [transfer])`
+
+* `channel` String
+* `message` any
+* `transfer` MessagePortMain[] (optional)
+
+Send a message to the renderer process, optionally transferring ownership of
+zero or more [`MessagePortMain`][] objects.
+
+The transferred `MessagePortMain` objects will be available in the renderer
+process by accessing the `ports` property of the emitted event. When they
+arrive in the renderer, they will be native DOM `MessagePort` objects.
+
+For example:
+
+```js
+// Main process
+const { port1, port2 } = new MessageChannelMain()
+webContents.mainFrame.postMessage('port', { message: 'hello' }, [port1])
+
+// Renderer process
+ipcRenderer.on('port', (e, msg) => {
+  const [port] = e.ports
+  // ...
+})
+```
+
 ### Instance Properties

 #### `frame.url` _Readonly_
@@ -122,9 +164,18 @@ content. The identifier is fixed at the creation of the frame and stays
 constant for the lifetime of the frame. When the frame is removed, the id is
 not used again.

+#### `frame.name` _Readonly_
+
+A `String` representing the frame name.
+
+#### `frame.osProcessId` _Readonly_
+
+An `Integer` representing the operating system `pid` of the process which owns this frame.
+
 #### `frame.processId` _Readonly_

-An `Integer` representing the id of the process which owns this frame.
+An `Integer` representing the Chromium internal `pid` of the process which owns this frame.
+This is not the same as the OS process ID; to read that use `frame.osProcessId`.

 #### `frame.routingId` _Readonly_

--- a/docs/api/web-frame.md
+++ b/docs/api/web-frame.md
@@ -175,6 +175,7 @@ reject and the `result` would be `undefined`. This is because Chromium does not
 dispatch errors of isolated worlds to foreign worlds.

 ### `webFrame.setIsolatedWorldInfo(worldId, info)`
+
 * `worldId` Integer - The ID of the world to run the javascript in, `0` is the default world, `999` is the world used by Electrons `contextIsolation` feature. Chrome extensions reserve the range of IDs in `[1 << 20, 1 << 29)`. You can provide any integer here.
 * `info` Object
  * `securityOrigin` String (optional) - Security origin for the isolated world.
@@ -257,6 +258,20 @@ renderer process.

 Returns `WebFrame` - that has the supplied `routingId`, `null` if not found.

+### `webFrame.isWordMisspelled(word)`
+
+* `word` String - The word to be spellchecked.
+
+Returns `Boolean` - True if the word is misspelled according to the built in
+spellchecker, false otherwise. If no dictionary is loaded, always return false.
+
+### `webFrame.getWordSuggestions(word)`
+
+* `word` String - The misspelled word.
+
+Returns `String[]` - A list of suggested words for a given word. If the word
+is spelled correctly, the result will be empty.
+
 ## Properties

 ### `webFrame.top` _Readonly_
--- a/docs/api/web-request.md
+++ b/docs/api/web-request.md
@@ -51,6 +51,8 @@ The following methods are available on instances of `WebRequest`:
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -94,6 +96,8 @@ Some examples of valid `urls`:
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -121,6 +125,8 @@ The `callback` has to be called with a `response` object.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -141,12 +147,13 @@ response are visible by the time this listener is fired.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
    * `statusLine` String
    * `statusCode` Integer
-    * `requestHeaders` Record<string, string>
    * `responseHeaders` Record<string, string[]> (optional)
  * `callback` Function
    * `headersReceivedResponse` Object
@@ -173,6 +180,8 @@ The `callback` has to be called with a `response` object.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -197,6 +206,8 @@ and response headers are available.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -222,6 +233,8 @@ redirect is about to occur.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
@@ -245,6 +258,8 @@ completed.
    * `url` String
    * `method` String
    * `webContentsId` Integer (optional)
+    * `webContents` WebContents (optional)
+    * `frame` WebFrameMain (optional)
    * `resourceType` String
    * `referrer` String
    * `timestamp` Double
--- a/docs/api/webview-tag.md
+++ b/docs/api/webview-tag.md
@@ -5,7 +5,7 @@
 Electron's `webview` tag is based on [Chromium's `webview`][chrome-webview], which
 is undergoing dramatic architectural changes. This impacts the stability of `webviews`,
 including rendering, navigation, and event routing. We currently recommend to not
-use the `webview` tag and to consider alternatives, like `iframe`, Electron's `BrowserView`,
+use the `webview` tag and to consider alternatives, like `iframe`, [Electron's `BrowserView`](browser-view.md),
 or an architecture that avoids embedded content altogether.

 ## Enabling
@@ -515,8 +515,7 @@ Inserts `text` to the focused element.
 * `text` String - Content to be searched, must not be empty.
 * `options` Object (optional)
  * `forward` Boolean (optional) - Whether to search forward or backward, defaults to `true`.
-  * `findNext` Boolean (optional) - Whether the operation is first request or a follow up,
-    defaults to `false`.
+  * `findNext` Boolean (optional) - Whether to begin a new text finding session with this request. Should be `true` for initial requests, and `false` for follow-up requests. Defaults to `false`.
  * `matchCase` Boolean (optional) - Whether search should be case-sensitive,
    defaults to `false`.

@@ -719,6 +718,10 @@ Corresponds to the points in time when the spinner of the tab starts spinning.

 Corresponds to the points in time when the spinner of the tab stops spinning.

+### Event: 'did-attach'
+
+Fired when attached to the embedder web contents.
+
 ### Event: 'dom-ready'

 Fired when document in the given frame is loaded.
@@ -839,6 +842,19 @@ this purpose.

 Calling `event.preventDefault()` does __NOT__ have any effect.

+### Event: 'did-start-navigation'
+
+Returns:
+
+* `url` String
+* `isInPlace` Boolean
+* `isMainFrame` Boolean
+* `frameProcessId` Integer
+* `frameRoutingId` Integer
+
+Emitted when any frame (including main) starts navigating. `isInPlace` will be
+`true` for in-page navigations.
+
 ### Event: 'did-navigate'

 Returns:
@@ -851,6 +867,23 @@ This event is not emitted for in-page navigations, such as clicking anchor links
 or updating the `window.location.hash`. Use `did-navigate-in-page` event for
 this purpose.

+### Event: 'did-frame-navigate'
+
+Returns:
+
+* `url` String
+* `httpResponseCode` Integer - -1 for non HTTP navigations
+* `httpStatusText` String - empty for non HTTP navigations,
+* `isMainFrame` Boolean
+* `frameProcessId` Integer
+* `frameRoutingId` Integer
+
+Emitted when any frame navigation is done.
+
+This event is not emitted for in-page navigations, such as clicking anchor links
+or updating the `window.location.hash`. Use `did-navigate-in-page` event for
+this purpose.
+
 ### Event: 'did-navigate-in-page'

 Returns:
@@ -966,4 +999,4 @@ Emitted when DevTools is closed.
 Emitted when DevTools is focused / opened.

 [runtime-enabled-features]: https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/runtime_enabled_features.json5?l=70
-[chrome-webview]: https://developer.chrome.com/apps/tags/webview
+[chrome-webview]: https://developer.chrome.com/docs/extensions/reference/webviewTag/
--- a/docs/api/window-open.md
+++ b/docs/api/window-open.md
@@ -1,18 +1,34 @@
-# `window.open` Function
+# Opening windows from the renderer

-> Open a new window and load a URL.
+There are several ways to control how windows are created from trusted or
+untrusted content within a renderer. Windows can be created from the renderer in two ways:

-When `window.open` is called to create a new window in a web page, a new instance
-of [`BrowserWindow`](browser-window.md) will be created for the `url` and a proxy will be returned
-to `window.open` to let the page have limited control over it.
+- clicking on links or submitting forms adorned with `target=_blank`
+- JavaScript calling `window.open()`

-The proxy has limited standard functionality implemented to be
-compatible with traditional web pages. For full control of the new window
-you should create a `BrowserWindow` directly.
+In non-sandboxed renderers, or when `nativeWindowOpen` is false (the default), this results in the creation of a
+[`BrowserWindowProxy`](browser-window-proxy.md), a light wrapper around
+`BrowserWindow`.

-The newly created `BrowserWindow` will inherit the parent window's options by
-default. To override inherited options you can set them in the `features`
-string.
+However, when the `sandbox` (or directly, `nativeWindowOpen`) option is set, a
+`Window` instance is created, as you'd expect in the browser. For same-origin
+content, the new window is created within the same process, enabling the parent
+to access the child window directly. This can be very useful for app sub-windows that act
+as preference panels, or similar, as the parent can render to the sub-window
+directly, as if it were a `div` in the parent.
+
+Electron pairs this native Chrome `Window` with a BrowserWindow under the hood.
+You can take advantage of all the customization available when creating a
+BrowserWindow in the main process by using `webContents.setWindowOpenHandler()`
+for renderer-created windows.
+
+BrowserWindow constructor options are set by, in increasing precedence
+order: options inherited from the parent, parsed options
+from the `features` string from `window.open()`, security-related webPreferences
+inherited from the parent, and options given by
+[`webContents.setWindowOpenHandler`](web-contents.md#contentssetwindowopenhandlerhandler).
+Note that `webContents.setWindowOpenHandler` has final say and full privilege
+because it is invoked in the main process.

 ### `window.open(url[, frameName][, features])`

@@ -20,15 +36,22 @@ string.
 * `frameName` String (optional)
 * `features` String (optional)

-Returns [`BrowserWindowProxy`](browser-window-proxy.md) - Creates a new window
-and returns an instance of `BrowserWindowProxy` class.
+Returns [`BrowserWindowProxy`](browser-window-proxy.md) | [`Window`](https://developer.mozilla.org/en-US/docs/Web/API/Window)

-The `features` string follows the format of standard browser, but each feature
-has to be a field of `BrowserWindow`'s options. These are the features you can set via `features` string: `zoomFactor`, `nodeIntegration`, `preload`, `javascript`, `contextIsolation`, `webviewTag`.
+`features` is a comma-separated key-value list, following the standard format of
+the browser. Electron will parse `BrowserWindowConstructorOptions` out of this
+list where possible, for convenience. For full control and better ergonomics,
+consider using `webContents.setWindowOpenHandler` to customize the
+BrowserWindow creation.
+
+A subset of `WebPreferences` can be set directly,
+unnested, from the features string: `zoomFactor`, `nodeIntegration`, `preload`,
+`javascript`, `contextIsolation`, and `webviewTag`.

 For example:
+
 ```js
-window.open('https://github.com', '_blank', 'nodeIntegration=no')
+window.open('https://github.com', '_blank', 'top=500,left=200,frame=false,nodeIntegration=no')
 ```

 **Notes:**
@@ -40,60 +63,77 @@ window.open('https://github.com', '_blank', 'nodeIntegration=no')
 * JavaScript will always be disabled in the opened `window` if it is disabled on
  the parent window.
 * Non-standard features (that are not handled by Chromium or Electron) given in
-  `features` will be passed to any registered `webContent`'s `new-window` event
-  handler in the `additionalFeatures` argument.
+  `features` will be passed to any registered `webContents`'s
+  `did-create-window` event handler in the `additionalFeatures` argument.

-### `window.opener.postMessage(message, targetOrigin)`
+To customize or cancel the creation of the window, you can optionally set an
+override handler with `webContents.setWindowOpenHandler()` from the main
+process. Returning `false` cancels the window, while returning an object sets
+the `BrowserWindowConstructorOptions` used when creating the window. Note that
+this is more powerful than passing options through the feature string, as the
+renderer has more limited privileges in deciding security preferences than the
+main process.

-* `message` String
-* `targetOrigin` String
-
-Sends a message to the parent window with the specified origin or `*` for no
-origin preference.
-
-### Using Chrome's `window.open()` implementation
-
-If you want to use Chrome's built-in `window.open()` implementation, set
-`nativeWindowOpen` to `true` in the `webPreferences` options object.
-
-Native `window.open()` allows synchronous access to opened windows so it is
-convenient choice if you need to open a dialog or a preferences window.
-
-This option can also be set on `<webview>` tags as well:
-
-```html
-<webview webpreferences="nativeWindowOpen=yes"></webview>
-```
-
-The creation of the `BrowserWindow` is customizable via `WebContents`'s
-`new-window` event.
+### `BrowserWindowProxy` example

 ```javascript
-// main process
+
+// main.js
+const mainWindow = new BrowserWindow()
+
+mainWindow.webContents.setWindowOpenHandler(({ url }) => {
+  if (url.startsWith('https://github.com/')) {
+    return { action: 'allow' }
+  }
+  return { action: 'deny' }
+})
+
+mainWindow.webContents.on('did-create-window', (childWindow) => {
+  // For example...
+  childWindow.webContents('will-navigate', (e) => {
+    e.preventDefault()
+  })
+})
+```
+
+```javascript
+// renderer.js
+const windowProxy = window.open('https://github.com/', null, 'minimizable=false')
+windowProxy.postMessage('hi', '*')
+```
+
+### Native `Window` example
+
+```javascript
+// main.js
 const mainWindow = new BrowserWindow({
-  width: 800,
-  height: 600,
  webPreferences: {
    nativeWindowOpen: true
  }
 })
-mainWindow.webContents.on('new-window', (event, url, frameName, disposition, options, additionalFeatures) => {
-  if (frameName === 'modal') {
-    // open window as modal
-    event.preventDefault()
-    Object.assign(options, {
-      modal: true,
-      parent: mainWindow,
-      width: 100,
-      height: 100
-    })
-    event.newGuest = new BrowserWindow(options)
+
+// In this example, only windows with the `about:blank` url will be created.
+// All other urls will be blocked.
+mainWindow.webContents.setWindowOpenHandler(({ url }) => {
+  if (url === 'about:blank') {
+    return {
+      action: 'allow',
+      overrideBrowserWindowOptions: {
+        frame: false,
+        fullscreenable: false,
+        backgroundColor: 'black',
+        webPreferences: {
+          preload: 'my-child-window-preload-script.js'
+        }
+      }
+    }
  }
+  return { action: 'deny' }
 })
 ```

 ```javascript
 // renderer process (mainWindow)
-const modal = window.open('', 'modal')
-modal.document.write('<h1>Hello</h1>')
+const childWindow = window.open('', 'modal')
+childWindow.document.write('<h1>Hello</h1>')
 ```
--- a/docs/breaking-changes.md
+++ b/docs/breaking-changes.md
@@ -6,14 +6,52 @@ Breaking changes will be documented here, and deprecation warnings added to JS c

 This document uses the following convention to categorize breaking changes:

- **API Changed:** An API was changed in such a way that code that has not been updated is guaranteed to throw an exception.
- **Behavior Changed:** The behavior of Electron has changed, but not in such a way that an exception will necessarily be thrown.
- **Default Changed:** Code depending on the old default may break, not necessarily throwing an exception. The old behavior can be restored by explicitly specifying the value.
- **Deprecated:** An API was marked as deprecated. The API will continue to function, but will emit a deprecation warning, and will be removed in a future release.
- **Removed:** An API or feature was removed, and is no longer supported by Electron.
+* **API Changed:** An API was changed in such a way that code that has not been updated is guaranteed to throw an exception.
+* **Behavior Changed:** The behavior of Electron has changed, but not in such a way that an exception will necessarily be thrown.
+* **Default Changed:** Code depending on the old default may break, not necessarily throwing an exception. The old behavior can be restored by explicitly specifying the value.
+* **Deprecated:** An API was marked as deprecated. The API will continue to function, but will emit a deprecation warning, and will be removed in a future release.
+* **Removed:** An API or feature was removed, and is no longer supported by Electron.
+
+## Planned Breaking API Changes (14.0)
+
+### API Changed: `window.(open)`
+
+The optional parameter `frameName` will no longer set the title of the window. This now follows the specification described by the [native documentation](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#parameters) under the corresponding parameter `windowName`.
+
+If you were using this parameter to set the title of a window, you can instead use [win.setTitle(title)](https://www.electronjs.org/docs/api/browser-window#winsettitletitle).
+
+### Removed: `worldSafeExecuteJavaScript`
+
+In Electron 14, `worldSafeExecuteJavaScript` will be removed.  There is no alternative, please
+ensure your code works with this property enabled.  It has been enabled by default since Electron
+12.
+
+You will be affected by this change if you use either `webFrame.executeJavaScript` or `webFrame.executeJavaScriptInIsolatedWorld`. You will need to ensure that values returned by either of those methods are supported by the [Context Bridge API](api/context-bridge.md#parameter--error--return-type-support) as these methods use the same value passing semantics.

 ## Planned Breaking API Changes (13.0)

+### API Changed: `session.setPermissionCheckHandler(handler)`
+
+The `handler` methods first parameter was previously always a `webContents`, it can now sometimes be `null`.  You should use the `requestingOrigin`, `embeddingOrigin` and `securityOrigin` properties to respond to the permission check correctly.  As the `webContents` can be `null` it can no longer be relied on.
+
+```js
+// Old code
+session.setPermissionCheckHandler((webContents, permission) => {
+  if (webContents.getURL().startsWith('https://google.com/') && permission === 'notification') {
+    return true
+  }
+  return false
+})
+
+// Replace with
+session.setPermissionCheckHandler((webContents, permission, requestingOrigin) => {
+  if (new URL(requestingOrigin).hostname === 'google.com' && permission === 'notification') {
+    return true
+  }
+  return false
+})
+```
+
 ### Removed: `shell.moveItemToTrash()`

 The deprecated synchronous `shell.moveItemToTrash()` API has been removed. Use
@@ -26,6 +64,78 @@ shell.moveItemToTrash(path)
 shell.trashItem(path).then(/* ... */)
 ```

+### Removed: `BrowserWindow` extension APIs
+
+The deprecated extension APIs have been removed:
+
+* `BrowserWindow.addExtension(path)`
+* `BrowserWindow.addDevToolsExtension(path)`
+* `BrowserWindow.removeExtension(name)`
+* `BrowserWindow.removeDevToolsExtension(name)`
+* `BrowserWindow.getExtensions()`
+* `BrowserWindow.getDevToolsExtensions()`
+
+Use the session APIs instead:
+
+* `ses.loadExtension(path)`
+* `ses.removeExtension(extension_id)`
+* `ses.getAllExtensions()`
+
+```js
+// Removed in Electron 13
+BrowserWindow.addExtension(path)
+BrowserWindow.addDevToolsExtension(path)
+// Replace with
+session.defaultSession.loadExtension(path)
+```
+
+```js
+// Removed in Electron 13
+BrowserWindow.removeExtension(name)
+BrowserWindow.removeDevToolsExtension(name)
+// Replace with
+session.defaultSession.removeExtension(extension_id)
+```
+
+```js
+// Removed in Electron 13
+BrowserWindow.getExtensions()
+BrowserWindow.getDevToolsExtensions()
+// Replace with
+session.defaultSession.getAllExtensions()
+```
+
+### Removed: methods in `systemPreferences`
+
+The following `systemPreferences` methods have been deprecated:
+
+* `systemPreferences.isDarkMode()`
+* `systemPreferences.isInvertedColorScheme()`
+* `systemPreferences.isHighContrastColorScheme()`
+
+Use the following `nativeTheme` properties instead:
+
+* `nativeTheme.shouldUseDarkColors`
+* `nativeTheme.shouldUseInvertedColorScheme`
+* `nativeTheme.shouldUseHighContrastColors`
+
+```js
+// Removed in Electron 13
+systemPreferences.isDarkMode()
+// Replace with
+nativeTheme.shouldUseDarkColors
+
+// Removed in Electron 13
+systemPreferences.isInvertedColorScheme()
+// Replace with
+nativeTheme.shouldUseInvertedColorScheme
+
+// Removed in Electron 13
+systemPreferences.isHighContrastColorScheme()
+// Replace with
+nativeTheme.shouldUseHighContrastColors
+```
+
 ## Planned Breaking API Changes (12.0)

 ### Removed: Pepper Flash support
@@ -34,6 +144,15 @@ Chromium has removed support for Flash, and so we must follow suit. See
 Chromium's [Flash Roadmap](https://www.chromium.org/flash-roadmap) for more
 details.

+### Default Changed: `worldSafeExecuteJavaScript` defaults to `true`
+
+In Electron 12, `worldSafeExecuteJavaScript` will be enabled by default.  To restore
+the previous behavior, `worldSafeExecuteJavaScript: false` must be specified in WebPreferences.
+Please note that setting this option to `false` is **insecure**.
+
+This option will be removed in Electron 14 so please migrate your code to support the default
+value.
+
 ### Default Changed: `contextIsolation` defaults to `true`

 In Electron 12, `contextIsolation` will be enabled by default.  To restore
@@ -41,19 +160,34 @@ the previous behavior, `contextIsolation: false` must be specified in WebPrefere

 We [recommend having contextIsolation enabled](https://github.com/electron/electron/blob/master/docs/tutorial/security.md#3-enable-context-isolation-for-remote-content) for the security of your application.

+Another implication is that `require()` cannot be used in the renderer process unless
+`nodeIntegration` is `true` and `contextIsolation` is `false`.
+
 For more details see: https://github.com/electron/electron/issues/23506

+### Removed: `crashReporter.getCrashesDirectory()`
+
+The `crashReporter.getCrashesDirectory` method has been removed. Usage
+should be replaced by `app.getPath('crashDumps')`.
+
+```js
+// Removed in Electron 12
+crashReporter.getCrashesDirectory()
+// Replace with
+app.getPath('crashDumps')
+```
+
 ### Removed: `crashReporter` methods in the renderer process

 The following `crashReporter` methods are no longer available in the renderer
 process:

- `crashReporter.start`
- `crashReporter.getLastCrashReport`
- `crashReporter.getUploadedReports`
- `crashReporter.getUploadToServer`
- `crashReporter.setUploadToServer`
- `crashReporter.getCrashesDirectory`
+* `crashReporter.start`
+* `crashReporter.getLastCrashReport`
+* `crashReporter.getUploadedReports`
+* `crashReporter.getUploadToServer`
+* `crashReporter.setUploadToServer`
+* `crashReporter.getCrashesDirectory`

 They should be called only from the main process.

@@ -103,7 +237,13 @@ shell.trashItem(path).then(/* ... */)

 ## Planned Breaking API Changes (11.0)

-There are no breaking changes planned for 11.0.
+### Removed: `BrowserView.{destroy, fromId, fromWebContents, getAllViews}` and `id` property of `BrowserView`
+
+The experimental APIs `BrowserView.{destroy, fromId, fromWebContents, getAllViews}`
+have now been removed. Additionally, the `id` property of `BrowserView`
+has also been removed.
+
+For more detailed information, see [#23578](https://github.com/electron/electron/pull/23578).

 ## Planned Breaking API Changes (10.0)

@@ -138,12 +278,12 @@ app.getPath('crashDumps')
 Calling the following `crashReporter` methods from the renderer process is
 deprecated:

- `crashReporter.start`
- `crashReporter.getLastCrashReport`
- `crashReporter.getUploadedReports`
- `crashReporter.getUploadToServer`
- `crashReporter.setUploadToServer`
- `crashReporter.getCrashesDirectory`
+* `crashReporter.start`
+* `crashReporter.getLastCrashReport`
+* `crashReporter.getUploadedReports`
+* `crashReporter.getUploadToServer`
+* `crashReporter.setUploadToServer`
+* `crashReporter.getCrashesDirectory`

 The only non-deprecated methods remaining in the `crashReporter` module in the
 renderer are `addExtraParameter`, `removeExtraParameter` and `getParameters`.
@@ -185,6 +325,7 @@ We [recommend moving away from the remote
 module](https://medium.com/@nornagon/electrons-remote-module-considered-harmful-70d69500f31).

 ### `protocol.unregisterProtocol`
+
 ### `protocol.uninterceptProtocol`

 The APIs are now synchronous and the optional callback is no longer needed.
@@ -197,14 +338,23 @@ 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.
@@ -246,6 +396,47 @@ you should plan to update your native modules to be context aware.

 For more detailed information see [#18397](https://github.com/electron/electron/issues/18397).

+### Deprecated: `BrowserWindow` extension APIs
+
+The following extension APIs have been deprecated:
+
+* `BrowserWindow.addExtension(path)`
+* `BrowserWindow.addDevToolsExtension(path)`
+* `BrowserWindow.removeExtension(name)`
+* `BrowserWindow.removeDevToolsExtension(name)`
+* `BrowserWindow.getExtensions()`
+* `BrowserWindow.getDevToolsExtensions()`
+
+Use the session APIs instead:
+
+* `ses.loadExtension(path)`
+* `ses.removeExtension(extension_id)`
+* `ses.getAllExtensions()`
+
+```js
+// Deprecated in Electron 9
+BrowserWindow.addExtension(path)
+BrowserWindow.addDevToolsExtension(path)
+// Replace with
+session.defaultSession.loadExtension(path)
+```
+
+```js
+// Deprecated in Electron 9
+BrowserWindow.removeExtension(name)
+BrowserWindow.removeDevToolsExtension(name)
+// Replace with
+session.defaultSession.removeExtension(extension_id)
+```
+
+```js
+// Deprecated in Electron 9
+BrowserWindow.getExtensions()
+BrowserWindow.getDevToolsExtensions()
+// Replace with
+session.defaultSession.getAllExtensions()
+```
+
 ### Removed: `<webview>.getWebContents()`

 This API, which was deprecated in Electron 8.0, is now removed.
@@ -298,9 +489,10 @@ 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
+* 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: () => {} })
@@ -310,23 +502,25 @@ ipcRenderer.send('channel', { value: 3, someFunction: () => {} })
 ipcRenderer.send('channel', { value: 3, someFunction: () => {} })
 // => throws Error("() => {} could not be cloned.")
 ```
- `NaN`, `Infinity` and `-Infinity` will now be correctly serialized, instead
+
+* `NaN`, `Infinity` and `-Infinity` will now be correctly serialized, instead
  of being converted to `null`.
- Objects containing cyclic references will now be correctly serialized,
+* 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,
+* `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
+* `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
+* 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
+* `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)
+* 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
+* 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)
 ```
@@ -389,6 +583,55 @@ in Electron 8.x, and cease to exist in Electron 9.x. The layout zoom level
 limits are now fixed at a minimum of 0.25 and a maximum of 5.0, as defined
 [here](https://chromium.googlesource.com/chromium/src/+/938b37a6d2886bf8335fc7db792f1eb46c65b2ae/third_party/blink/common/page/page_zoom.cc#11).

+### Deprecated events in `systemPreferences`
+
+The following `systemPreferences` events have been deprecated:
+
+* `inverted-color-scheme-changed`
+* `high-contrast-color-scheme-changed`
+
+Use the new `updated` event on the `nativeTheme` module instead.
+
+```js
+// Deprecated
+systemPreferences.on('inverted-color-scheme-changed', () => { /* ... */ })
+systemPreferences.on('high-contrast-color-scheme-changed', () => { /* ... */ })
+
+// Replace with
+nativeTheme.on('updated', () => { /* ... */ })
+```
+
+### Deprecated: methods in `systemPreferences`
+
+The following `systemPreferences` methods have been deprecated:
+
+* `systemPreferences.isDarkMode()`
+* `systemPreferences.isInvertedColorScheme()`
+* `systemPreferences.isHighContrastColorScheme()`
+
+Use the following `nativeTheme` properties instead:
+
+* `nativeTheme.shouldUseDarkColors`
+* `nativeTheme.shouldUseInvertedColorScheme`
+* `nativeTheme.shouldUseHighContrastColors`
+
+```js
+// Deprecated
+systemPreferences.isDarkMode()
+// Replace with
+nativeTheme.shouldUseDarkColors
+
+// Deprecated
+systemPreferences.isInvertedColorScheme()
+// Replace with
+nativeTheme.shouldUseInvertedColorScheme
+
+// Deprecated
+systemPreferences.isHighContrastColorScheme()
+// Replace with
+nativeTheme.shouldUseHighContrastColors
+```
+
 ## Planned Breaking API Changes (7.0)

 ### Deprecated: Atom.io Node Headers URL
@@ -462,6 +705,7 @@ the folder, similarly to Chrome, Firefox, and Edge
 ([link to MDN docs](https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/webkitdirectory)).

 As an illustration, take a folder with this structure:
+
 ```console
 folder
 ├── file1
@@ -470,11 +714,13 @@ folder
 ```

 In Electron <=6, this would return a `FileList` with a `File` object for:
+
 ```console
 path/to/folder
 ```

 In Electron 7, this now returns a `FileList` with a `File` object for:
+
 ```console
 /path/to/folder/file3
 /path/to/folder/file2
@@ -485,6 +731,55 @@ Note that `webkitdirectory` no longer exposes the path to the selected folder.
 If you require the path to the selected folder rather than the folder contents,
 see the `dialog.showOpenDialog` API ([link](https://github.com/electron/electron/blob/master/docs/api/dialog.md#dialogshowopendialogbrowserwindow-options)).

+### API Changed: Callback-based versions of promisified APIs
+
+Electron 5 and Electron 6 introduced Promise-based versions of existing
+asynchronous APIs and deprecated their older, callback-based counterparts.
+In Electron 7, all deprecated callback-based APIs are now removed.
+
+These functions now only return Promises:
+
+* `app.getFileIcon()` [#15742](https://github.com/electron/electron/pull/15742)
+* `app.dock.show()` [#16904](https://github.com/electron/electron/pull/16904)
+* `contentTracing.getCategories()` [#16583](https://github.com/electron/electron/pull/16583)
+* `contentTracing.getTraceBufferUsage()` [#16600](https://github.com/electron/electron/pull/16600)
+* `contentTracing.startRecording()` [#16584](https://github.com/electron/electron/pull/16584)
+* `contentTracing.stopRecording()` [#16584](https://github.com/electron/electron/pull/16584)
+* `contents.executeJavaScript()` [#17312](https://github.com/electron/electron/pull/17312)
+* `cookies.flushStore()` [#16464](https://github.com/electron/electron/pull/16464)
+* `cookies.get()` [#16464](https://github.com/electron/electron/pull/16464)
+* `cookies.remove()` [#16464](https://github.com/electron/electron/pull/16464)
+* `cookies.set()` [#16464](https://github.com/electron/electron/pull/16464)
+* `debugger.sendCommand()` [#16861](https://github.com/electron/electron/pull/16861)
+* `dialog.showCertificateTrustDialog()` [#17181](https://github.com/electron/electron/pull/17181)
+* `inAppPurchase.getProducts()` [#17355](https://github.com/electron/electron/pull/17355)
+* `inAppPurchase.purchaseProduct()`[#17355](https://github.com/electron/electron/pull/17355)
+* `netLog.stopLogging()` [#16862](https://github.com/electron/electron/pull/16862)
+* `session.clearAuthCache()` [#17259](https://github.com/electron/electron/pull/17259)
+* `session.clearCache()`  [#17185](https://github.com/electron/electron/pull/17185)
+* `session.clearHostResolverCache()` [#17229](https://github.com/electron/electron/pull/17229)
+* `session.clearStorageData()` [#17249](https://github.com/electron/electron/pull/17249)
+* `session.getBlobData()` [#17303](https://github.com/electron/electron/pull/17303)
+* `session.getCacheSize()`  [#17185](https://github.com/electron/electron/pull/17185)
+* `session.resolveProxy()` [#17222](https://github.com/electron/electron/pull/17222)
+* `session.setProxy()`  [#17222](https://github.com/electron/electron/pull/17222)
+* `shell.openExternal()` [#16176](https://github.com/electron/electron/pull/16176)
+* `webContents.loadFile()` [#15855](https://github.com/electron/electron/pull/15855)
+* `webContents.loadURL()` [#15855](https://github.com/electron/electron/pull/15855)
+* `webContents.hasServiceWorker()` [#16535](https://github.com/electron/electron/pull/16535)
+* `webContents.printToPDF()` [#16795](https://github.com/electron/electron/pull/16795)
+* `webContents.savePage()` [#16742](https://github.com/electron/electron/pull/16742)
+* `webFrame.executeJavaScript()` [#17312](https://github.com/electron/electron/pull/17312)
+* `webFrame.executeJavaScriptInIsolatedWorld()` [#17312](https://github.com/electron/electron/pull/17312)
+* `webviewTag.executeJavaScript()` [#17312](https://github.com/electron/electron/pull/17312)
+* `win.capturePage()` [#15743](https://github.com/electron/electron/pull/15743)
+
+These functions now have two forms, synchronous and Promise-based asynchronous:
+
+* `dialog.showMessageBox()`/`dialog.showMessageBoxSync()` [#17298](https://github.com/electron/electron/pull/17298)
+* `dialog.showOpenDialog()`/`dialog.showOpenDialogSync()` [#16973](https://github.com/electron/electron/pull/16973)
+* `dialog.showSaveDialog()`/`dialog.showSaveDialogSync()` [#17054](https://github.com/electron/electron/pull/17054)
+
 ## Planned Breaking API Changes (6.0)

 ### API Changed: `win.setMenu(null)` is now `win.removeMenu()`
@@ -496,19 +791,6 @@ win.setMenu(null)
 win.removeMenu()
 ```

-### API Changed: `contentTracing.getTraceBufferUsage()` is now a promise
-
-```js
-// Deprecated
-contentTracing.getTraceBufferUsage((percentage, value) => {
-  // do something
-})
-// Replace with
-contentTracing.getTraceBufferUsage().then(infoObject => {
-  // infoObject has percentage and value fields
-})
-```
-
 ### API Changed: `electron.screen` in the renderer process should be accessed via `remote`

 ```js
@@ -629,7 +911,9 @@ webFrame.setIsolatedWorldInfo(
 ```

 ### API Changed: `webFrame.setSpellCheckProvider` now takes an asynchronous callback
+
 The `spellCheck` callback is now asynchronous, and `autoCorrectWord` parameter has been removed.
+
 ```js
 // Deprecated
 webFrame.setSpellCheckProvider('en-US', true, {
@@ -645,6 +929,31 @@ webFrame.setSpellCheckProvider('en-US', {
 })
 ```

+### API Changed: `webContents.getZoomLevel` and `webContents.getZoomFactor` are now synchronous
+
+`webContents.getZoomLevel` and `webContents.getZoomFactor` no longer take callback parameters,
+instead directly returning their number values.
+
+```js
+// Deprecated
+webContents.getZoomLevel((level) => {
+  console.log(level)
+})
+// Replace with
+const level = webContents.getZoomLevel()
+console.log(level)
+```
+
+```js
+// Deprecated
+webContents.getZoomFactor((factor) => {
+  console.log(factor)
+})
+// Replace with
+const factor = webContents.getZoomFactor()
+console.log(factor)
+```
+
 ## Planned Breaking API Changes (4.0)

 The following list includes the breaking API changes made in Electron 4.0.
--- a/docs/development/README.md
+++ b/docs/development/README.md
@@ -12,6 +12,7 @@ For guides on Electron app development, see
 * [Source Code Directory Structure](source-code-directory-structure.md)
 * [Coding Style](coding-style.md)
 * [Using clang-format on C++ Code](clang-format.md)
+* [Using clang-tidy on C++ Code](clang-tidy.md)
 * [Build System Overview](build-system-overview.md)
 * [Build Instructions (macOS)](build-instructions-macos.md)
 * [Build Instructions (Windows)](build-instructions-windows.md)
--- a/docs/development/build-instructions-gn.md
+++ b/docs/development/build-instructions-gn.md
@@ -1,14 +1,16 @@
 # Build Instructions

-Follow the guidelines below for building Electron.
+Follow the guidelines below for building **Electron itself**, for the purposes of creating custom Electron binaries. For bundling and distributing your app code with the prebuilt Electron binaries, see the [application distribution][application-distribution] guide.
+
+[application-distribution]: ../tutorial/application-distribution.md

 ## Platform prerequisites

 Check the build prerequisites for your platform before proceeding

-  * [macOS](build-instructions-macos.md#prerequisites)
-  * [Linux](build-instructions-linux.md#prerequisites)
-  * [Windows](build-instructions-windows.md#prerequisites)
+* [macOS](build-instructions-macos.md#prerequisites)
+* [Linux](build-instructions-linux.md#prerequisites)
+* [Windows](build-instructions-windows.md#prerequisites)

 ## Build Tools

@@ -26,7 +28,7 @@ Security` → `System` → `Advanced system settings` and add a system variable
 your locally installed version of Visual Studio (by default, `depot_tools` will
 try to download a Google-internal version that only Googlers have access to).

-[depot-tools]: http://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up
+[depot-tools]: https://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up

 ### Setting up the git cache

@@ -53,7 +55,7 @@ $ gclient sync --with_branch_heads --with_tags
 > Instead of `https://github.com/electron/electron`, you can use your own fork
 > here (something like `https://github.com/<username>/electron`).

-#### A note on pulling/pushing
+### A note on pulling/pushing

 If you intend to `git pull` or `git push` from the official `electron`
 repository in the future, you now need to update the respective folder's
@@ -74,6 +76,7 @@ Running `gclient sync -f` ensures that all dependencies required
 to build Electron match that file.

 So, in order to pull, you'd run the following commands:
+
 ```sh
 $ cd src/electron
 $ git pull
@@ -85,12 +88,11 @@ $ gclient sync -f
 ```sh
 $ cd src
 $ export CHROMIUM_BUILDTOOLS_PATH=`pwd`/buildtools
-# this next line is needed only if building with sccache
-$ export GN_EXTRA_ARGS="${GN_EXTRA_ARGS} cc_wrapper=\"${PWD}/electron/external_binaries/sccache\""
 $ gn gen out/Testing --args="import(\"//electron/build/args/testing.gn\") $GN_EXTRA_ARGS"
 ```

 Or on Windows (without the optional argument):
+
 ```sh
 $ cd src
 $ set CHROMIUM_BUILDTOOLS_PATH=%cd%\buildtools
@@ -124,11 +126,13 @@ $ gn gen out/Release --args="import(\"//electron/build/args/release.gn\") $GN_EX
 Nota Bene: This will also take a while and probably heat up your lap.

 For the testing configuration:
+
 ```sh
 $ ninja -C out/Testing electron
 ```

 For the release configuration:
+
 ```sh
 $ ninja -C out/Release electron
 ```
@@ -137,12 +141,6 @@ This will build all of what was previously 'libchromiumcontent' (i.e. the
 `content/` directory of `chromium` and its dependencies, incl. WebKit and V8),
 so it will take a while.

-To speed up subsequent builds, you can use [sccache][sccache]. Add the GN arg
-`cc_wrapper = "sccache"` by running `gn args out/Testing` to bring up an
-editor and adding a line to the end of the file.
-
-[sccache]: https://github.com/mozilla/sccache
-
 The built executable will be under `./out/Testing`:

 ```sh
@@ -156,11 +154,13 @@ $ ./out/Testing/electron
 ### Packaging

 On linux, first strip the debugging and symbol information:
+
 ```sh
 electron/script/strip-binaries.py -d out/Release
 ```

 To package the electron build as a distributable zip file:
+
 ```sh
 ninja -C out/Release electron:electron_dist_zip
 ```
@@ -177,12 +177,11 @@ $ gn gen out/Testing-x86 --args='... target_cpu = "x86"'

 Not all combinations of source and target CPU/OS are supported by Chromium.

-<table>
-<tr><th>Host</th><th>Target</th><th>Status</th></tr>
-<tr><td>Windows x64</td><td>Windows arm64</td><td>Experimental</td>
-<tr><td>Windows x64</td><td>Windows x86</td><td>Automatically tested</td></tr>
-<tr><td>Linux x64</td><td>Linux x86</td><td>Automatically tested</td></tr>
-</table>
+| Host        | Target        | Status               |
+|-------------|---------------|----------------------|
+| Windows x64 | Windows arm64 | Experimental         |
+| Windows x64 | Windows x86   | Automatically tested |
+| Linux x64   | Linux x86     | Automatically tested |

 If you test other combinations and find them to work, please update this document :)

@@ -193,6 +192,7 @@ and [`target_cpu`][target_cpu values].
 [target_cpu values]: https://gn.googlesource.com/gn/+/master/docs/reference.md#built_in-predefined-variables-target_cpu_the-desired-cpu-architecture-for-the-build-possible-values

 #### Windows on Arm (experimental)
+
 To cross-compile for Windows on Arm, [follow Chromium's guide](https://chromium.googlesource.com/chromium/src/+/refs/heads/master/docs/windows_build_instructions.md#Visual-Studio) to get the necessary dependencies, SDK and libraries, then build with `ELECTRON_BUILDING_WOA=1` in your environment before running `gclient sync`.

 ```bat
@@ -201,6 +201,7 @@ gclient sync -f --with_branch_heads --with_tags
 ```

 Or (if using PowerShell):
+
 ```powershell
 $env:ELECTRON_BUILDING_WOA=1
 gclient sync -f --with_branch_heads --with_tags
@@ -208,7 +209,6 @@ gclient sync -f --with_branch_heads --with_tags

 Next, run `gn gen` as above with `target_cpu="arm64"`.

-
 ## Tests

 To run the tests, you'll first need to build the test modules against the
@@ -274,6 +274,7 @@ $ gclient sync -f
 ```

 ### I'm being asked for a username/password for chromium-internal.googlesource.com
+
 If you see a prompt for `Username for 'https://chrome-internal.googlesource.com':` when running `gclient sync` on Windows, it's probably because the `DEPOT_TOOLS_WIN_TOOLCHAIN` environment variable is not set to 0. Open `Control Panel` → `System and Security` → `System` → `Advanced system settings` and add a system variable
 `DEPOT_TOOLS_WIN_TOOLCHAIN` with value `0`.  This tells `depot_tools` to use
 your locally installed version of Visual Studio (by default, `depot_tools` will
--- a/docs/development/build-instructions-linux.md
+++ b/docs/development/build-instructions-linux.md
@@ -1,6 +1,8 @@
 # Build Instructions (Linux)

-Follow the guidelines below for building Electron on Linux.
+Follow the guidelines below for building **Electron itself** on Linux, for the purposes of creating custom Electron binaries. For bundling and distributing your app code with the prebuilt Electron binaries, see the [application distribution][application-distribution] guide.
+
+[application-distribution]: ../tutorial/application-distribution.md

 ## Prerequisites

@@ -55,6 +57,15 @@ $ sudo dnf install clang dbus-devel gtk3-devel libnotify-devel \
                   nss-devel python-dbusmock openjdk-8-jre
 ```

+On Arch Linux / Manjaro, install the following libraries:
+
+```sh
+$ sudo pacman -Syu base-devel clang libdbus gtk2 libnotify \
+                   libgnome-keyring alsa-lib libcap libcups libxtst \
+                   libxss nss gcc-multilib curl gperf bison \
+                   python2 python-dbusmock jdk8-openjdk
+```
+
 Other distributions may offer similar packages for installation via package
 managers such as pacman. Or one can compile from source code.

--- a/docs/development/build-instructions-macos.md
+++ b/docs/development/build-instructions-macos.md
@@ -1,6 +1,8 @@
 # Build Instructions (macOS)

-Follow the guidelines below for building Electron on macOS.
+Follow the guidelines below for building **Electron itself** on macOS, for the purposes of creating custom Electron binaries. For bundling and distributing your app code with the prebuilt Electron binaries, see the [application distribution][application-distribution] guide.
+
+[application-distribution]: ../tutorial/application-distribution.md

 ## Prerequisites

@@ -42,7 +44,7 @@ $ pip install pyobjc
 If you're developing Electron and don't plan to redistribute your
 custom Electron build, you may skip this section.

-Official Electron builds are built with [Xcode 9.4.1](http://adcdownload.apple.com/Developer_Tools/Xcode_9.4.1/Xcode_9.4.1.xip), and the macOS 10.13 SDK.  Building with a newer SDK works too, but the releases currently use the 10.13 SDK.
+Official Electron builds are built with [Xcode 12.2](https://download.developer.apple.com/Developer_Tools/Xcode_12.2/Xcode_12.2.xip), and the macOS 11.0 SDK. Building with a newer SDK works too, but the releases currently use the 11.0 SDK.

 ## Building Electron

--- a/docs/development/build-instructions-windows.md
+++ b/docs/development/build-instructions-windows.md
@@ -1,6 +1,8 @@
 # Build Instructions (Windows)

-Follow the guidelines below for building Electron on Windows.
+Follow the guidelines below for building **Electron itself** on Windows, for the purposes of creating custom Electron binaries. For bundling and distributing your app code with the prebuilt Electron binaries, see the [application distribution][application-distribution] guide.
+
+[application-distribution]: ../tutorial/application-distribution.md

 ## Prerequisites

@@ -13,17 +15,10 @@ Follow the guidelines below for building Electron on Windows.
  set a few environment variables to point the toolchains to your installation path.
    * `vs2019_install = DRIVE:\path\to\Microsoft Visual Studio\2019\Community`, replacing `2019` and `Community` with your installed versions and replacing `DRIVE:` with the drive that Visual Studio is on. Often, this will be `C:`.
    * `WINDOWSSDKDIR = DRIVE:\path\to\Windows Kits\10`, replacing `DRIVE:` with the drive that Windows Kits is on. Often, this will be `C:`.
-* [Python 2.7.10 or higher](http://www.python.org/download/releases/2.7/)
-  * Contrary to the `depot_tools` setup instructions linked below, you will need
-  to use your locally installed Python with at least version 2.7.10 (with
-  support for TLS 1.2). To do so, make sure that in **PATH**, your locally
-  installed Python comes before the `depot_tools` folder. Right now
-  `depot_tools` still comes with Python 2.7.6, which will cause the `gclient`
-  command to fail (see https://crbug.com/868864).
  * [Python for Windows (pywin32) Extensions](https://pypi.org/project/pywin32/#files)
  is also needed in order to run the build process.
 * [Node.js](https://nodejs.org/download/)
-* [Git](http://git-scm.com)
+* [Git](https://git-scm.com)
 * Debugging Tools for Windows of Windows SDK 10.0.15063.468 if you plan on
 creating a full distribution since `symstore.exe` is used for creating a symbol
 store from `.pdb` files.
@@ -50,6 +45,13 @@ building with Visual Studio will come in the future.
 **Note:** Even though Visual Studio is not used for building, it's still
 **required** because we need the build toolchains it provides.

+## Exclude source tree from Windows Security
+
+Windows Security doesn't like one of the files in the Chromium source code
+(see https://crbug.com/441184), so it will constantly delete it, causing `gclient sync` issues.
+You can exclude the source tree from being monitored by Windows Security by
+[following these instructions](https://support.microsoft.com/en-us/windows/add-an-exclusion-to-windows-security-811816c0-4dfd-af4a-47e4-c301afe13b26).
+
 ## Building

 See [Build Instructions: GN](build-instructions-gn.md)
--- a/docs/development/chromium-development.md
+++ b/docs/development/chromium-development.md
@@ -8,6 +8,6 @@
 - [Code Search](https://cs.chromium.org/)
 - [Source Code](https://cs.chromium.org/chromium/src/)
 - [Development Calendar and Release Info](https://www.chromium.org/developers/calendar)
- [Discussion Groups](http://www.chromium.org/developers/discussion-groups)
+- [Discussion Groups](https://www.chromium.org/developers/discussion-groups)

 See also [V8 Development](v8-development.md)
--- a/docs/development/clang-format.md
+++ b/docs/development/clang-format.md
@@ -1,6 +1,6 @@
 # Using clang-format on C++ Code

-[`clang-format`](http://clang.llvm.org/docs/ClangFormat.html) is a tool to
+[`clang-format`](https://clang.llvm.org/docs/ClangFormat.html) is a tool to
 automatically format C/C++/Objective-C code, so that developers don't need to
 worry about style issues during code reviews.

@@ -30,6 +30,6 @@ run `git-clang-format HEAD~1`. See `git-clang-format -h` for more details.
 You can also integrate `clang-format` directly into your favorite editors.
 For further guidance on setting up editor integration, see these pages:

-  * [Atom](https://atom.io/packages/clang-format)
-  * [Vim & Emacs](http://clang.llvm.org/docs/ClangFormat.html#vim-integration)
-  * [Visual Studio Code](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format)
+* [Atom](https://atom.io/packages/clang-format)
+* [Vim & Emacs](https://clang.llvm.org/docs/ClangFormat.html#vim-integration)
+* [Visual Studio Code](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format)
--- a/docs/development/clang-tidy.md
+++ b/docs/development/clang-tidy.md
@@ -0,0 +1,37 @@
+# Using clang-tidy on C++ Code
+
+[`clang-tidy`](https://clang.llvm.org/extra/clang-tidy/) is a tool to
+automatically check C/C++/Objective-C code for style violations, programming
+errors, and best practices.
+
+Electron's `clang-tidy` integration is provided as a linter script which can
+be run with `npm run lint:clang-tidy`. While `clang-tidy` checks your on-disk
+files, you need to have built Electron so that it knows which compiler flags
+were used. There is one required option for the script `--output-dir`, which
+tells the script which build directory to pull the compilation information
+from. A typical usage would be:
+`npm run lint:clang-tidy --out-dir ../out/Testing`
+
+With no filenames provided, all C/C++/Objective-C files will be checked.
+You can provide a list of files to be checked by passing the filenames after
+the options:
+`npm run lint:clang-tidy --out-dir ../out/Testing shell/browser/api/electron_api_app.cc`
+
+While `clang-tidy` has a
+[long list](https://clang.llvm.org/extra/clang-tidy/checks/list.html)
+of possible checks, in Electron only a few are enabled by default. At the
+moment Electron doesn't have a `.clang-tidy` config, so `clang-tidy` will
+find the one from Chromium at `src/.clang-tidy` and use the checks which
+Chromium has enabled. You can change which checks are run by using the
+`--checks=` option. This is passed straight through to `clang-tidy`, so see
+its documentation for full details. Wildcards can be used, and checks can
+be disabled by prefixing a `-`. By default any checks listed are added to
+those in `.clang-tidy`, so if you'd like to limit the checks to specific
+ones you should first exclude all checks then add back what you want, like
+`--checks=-*,performance*`.
+
+Running `clang-tidy` is rather slow - internally it compiles each file and
+then runs the checks so it will always be some factor slower than compilation.
+While you can use parallel runs to speed it up using the `--jobs|-j` option,
+`clang-tidy` also uses a lot of memory during its checks, so it can easily
+run into out-of-memory errors. As such the default number of jobs is one.
--- a/docs/development/coding-style.md
+++ b/docs/development/coding-style.md
@@ -25,7 +25,7 @@ You can run `npm run lint` to show any style issues detected by `cpplint` and
 ## C++ and Python

 For C++ and Python, we follow Chromium's [Coding
-Style](https://www.chromium.org/developers/coding-style). You can use
+Style](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/styleguide/styleguide.md). You can use
 [clang-format](clang-format.md) to format the C++ code automatically. There is
 also a script `script/cpplint.py` to check whether all files conform.

@@ -47,7 +47,7 @@ formatted correctly.

 ## JavaScript

-* Write [standard](https://npm.im/standard) JavaScript style.
+* Write [standard](https://www.npmjs.com/package/standard) JavaScript style.
 * File names should be concatenated with `-` instead of `_`, e.g.
  `file-name.js` rather than `file_name.js`, because in
  [github/atom](https://github.com/github/atom) module names are usually in
@@ -66,11 +66,11 @@ formatted correctly.

 Electron APIs uses the same capitalization scheme as Node.js:

- When the module itself is a class like `BrowserWindow`, use `PascalCase`.
- When the module is a set of APIs, like `globalShortcut`, use `camelCase`.
- When the API is a property of object, and it is complex enough to be in a
+* When the module itself is a class like `BrowserWindow`, use `PascalCase`.
+* When the module is a set of APIs, like `globalShortcut`, use `camelCase`.
+* When the API is a property of object, and it is complex enough to be in a
  separate chapter like `win.webContents`, use `mixedCase`.
- For other non-module APIs, use natural titles, like `<webview> Tag` or
+* For other non-module APIs, use natural titles, like `<webview> Tag` or
  `Process Object`.

 When creating a new API, it is preferred to use getters and setters instead of
--- a/docs/development/debugging-instructions-macos-xcode.md
+++ b/docs/development/debugging-instructions-macos-xcode.md
@@ -1,10 +1,13 @@
 ## Debugging with XCode

 ### Generate xcode project for debugging sources (cannot build code from xcode)
+
 Run `gn gen` with the --ide=xcode argument.
+
 ```sh
 $ gn gen out/Testing --ide=xcode
 ```
+
 This will generate the electron.ninja.xcworkspace. You will have to open this workspace
 to set breakpoints and inspect.

--- a/docs/development/debugging-instructions-macos.md
+++ b/docs/development/debugging-instructions-macos.md
@@ -24,8 +24,11 @@ you prefer a graphical interface.
  debugging C, Objective-C and C++ on the desktop and iOS devices and simulator.

 * **.lldbinit**: Create or edit `~/.lldbinit` to allow Chromium code to be properly source-mapped.
+
   ```text
-   command script import ~/electron/src/tools/lldb/lldbinit.py
+   # e.g: ['~/electron/src/tools/lldb']
+   script sys.path[:0] = ['<...path/to/electron/src/tools/lldb>']
+   script import lldbinit
   ```

 ## Attaching to and Debugging Electron
@@ -120,6 +123,7 @@ Now, if you open up Electron's developer tools and call `setName`, you will once
 breakpoint.

 ### Further Reading
+
 LLDB is a powerful tool with a great documentation. To learn more about it, consider
 Apple's debugging documentation, for instance the [LLDB Command Structure Reference][lldb-command-structure]
 or the introduction to [Using LLDB as a Standalone Debugger][lldb-standalone].
@@ -129,4 +133,4 @@ will explain more complex debugging scenarios.

 [lldb-command-structure]: https://developer.apple.com/library/mac/documentation/IDEs/Conceptual/gdb_to_lldb_transition_guide/document/lldb-basics.html#//apple_ref/doc/uid/TP40012917-CH2-SW2
 [lldb-standalone]: https://developer.apple.com/library/mac/documentation/IDEs/Conceptual/gdb_to_lldb_transition_guide/document/lldb-terminal-workflow-tutorial.html
-[lldb-tutorial]: http://lldb.llvm.org/tutorial.html
+[lldb-tutorial]: https://lldb.llvm.org/tutorial.html
--- a/docs/development/electron-vs-nwjs.md
+++ b/docs/development/electron-vs-nwjs.md
@@ -19,7 +19,7 @@ application.

 Electron works more like the Node.js runtime. Electron's APIs are lower level so
 you can use it for browser testing in place of
-[PhantomJS](http://phantomjs.org/).
+[PhantomJS](https://phantomjs.org/).

 ## 2) Node Integration

--- a/docs/development/issues.md
+++ b/docs/development/issues.md
@@ -35,46 +35,8 @@ To submit a bug report:
 When opening a new issue in the [`electron/electron` issue tracker](https://github.com/electron/electron/issues/new/choose), users
 will be presented with a template that should be filled in.

-```markdown
-<!--
-Thanks for opening an issue! A few things to keep in mind:
-
- The issue tracker is only for bugs and feature requests.
- Before reporting a bug, please try reproducing your issue against
-  the latest version of Electron.
- If you need general advice, join our Slack: http://atom-slack.herokuapp.com
-->
-
-* Electron version:
-* Operating system:
-
-### Expected behavior
-
-<!-- What do you think should happen? -->
-
-### Actual behavior
-
-<!-- What actually happens? -->
-
-### How to reproduce
-
-<!--
-
-Your best chance of getting this bug looked at quickly is to provide a REPOSITORY that can be cloned and run.
-
-You can fork https://github.com/electron/electron-quick-start and include a link to the branch with your changes.
-
-If you provide a URL, please list the commands required to clone/setup/run your repo e.g.
-
-  $ git clone $YOUR_URL -b $BRANCH
-  $ npm install
-  $ npm start || electron .
-
-->
-```
-
-If you believe that you have found a bug in Electron, please fill out this
-form to the best of your ability.
+If you believe that you have found a bug in Electron, please fill out the template
+to the best of your ability.

 The two most important pieces of information needed to evaluate the report are
 a description of the bug and a simple test case to recreate it. It is easier to fix
--- a/Show More
+++ b/Show More