Bump v11.0.4

docs: added fiddle support for code samples (#26766 )
Co-authored-by: Antonio <bandantonio@users.noreply.github.com>
2026-02-19 03:14:51 -05:00 · 2020-12-07 10:06:44 -08:00 · 2020-12-03 15:54:49 +09:00 · 2020-12-02 14:29:00 -05:00 · 2020-12-02 11:18:56 -05:00 · 2020-12-01 21:35:53 -08:00
1026 changed files with 39024 additions and 19895 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -37,10 +37,18 @@ parameters:
    type: boolean
    default: false

+  run-osx-publish-arm64:
+    type: boolean
+    default: false
+
  run-mas-publish:
    type: boolean
    default: false

+  run-mas-publish-arm64:
+    type: boolean
+    default: false
+
  run-linux-publish:
    type: boolean
    default: false
@@ -61,7 +69,7 @@ parameters:
 # Build machines configs.
 docker-image: &docker-image
  docker:
-    - image: electronjs/build:d09fd95029bd8c1c73069888231b29688ef385ed
+    - image: electron.azurecr.io/build:4cec2c5ab66765caa724e37bae2bffb9b29722a5

 machine-linux-medium: &machine-linux-medium
  <<: *docker-image
@@ -77,12 +85,17 @@ machine-linux-2xlarge: &machine-linux-2xlarge

 machine-mac: &machine-mac
  macos:
-    xcode: "11.1.0"
+    xcode: "12.2.0"

 machine-mac-large: &machine-mac-large
  resource_class: large
  macos:
-    xcode: "11.1.0"
+    xcode: "12.2.0"
+
+machine-mac-large-arm: &machine-mac-large-arm
+  resource_class: large
+  macos:
+    xcode: "12.2.0"

 # Build configurations options.
 env-testing-build: &env-testing-build
@@ -94,6 +107,7 @@ 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'
@@ -123,6 +137,11 @@ env-arm: &env-arm
  BUILD_NATIVE_MKSNAPSHOT: 1
  TARGET_ARCH: arm

+env-apple-silicon: &env-apple-silicon
+  GN_EXTRA_ARGS: 'target_cpu = "arm64" use_prebuilt_v8_context_snapshot = true'
+  TARGET_ARCH: arm64
+  USE_PREBUILT_V8_CONTEXT_SNAPSHOT: 1
+
 env-arm64: &env-arm64
  GN_EXTRA_ARGS: 'target_cpu = "arm64" fatal_linker_warnings = false enable_linux_installer = false'
  MKSNAPSHOT_TOOLCHAIN: //build/toolchain/linux:clang_arm64
@@ -133,6 +152,12 @@ env-mas: &env-mas
  GN_EXTRA_ARGS: 'is_mas_build = true'
  MAS_BUILD: 'true'

+env-mas-apple-silicon: &env-mas-apple-silicon
+  GN_EXTRA_ARGS: 'target_cpu = "arm64" is_mas_build = true use_prebuilt_v8_context_snapshot = true'
+  MAS_BUILD: 'true'
+  TARGET_ARCH: arm64
+  USE_PREBUILT_V8_CONTEXT_SNAPSHOT: 1
+
 # Misc build configuration options.
 env-enable-sccache: &env-enable-sccache
  USE_SCCACHE: true
@@ -232,23 +257,34 @@ 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="Electron Bot" GIT_COMMITTER_EMAIL="electron@github.com" git commit -m "update patches" --author="Electron Bot <electron@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

@@ -275,10 +311,10 @@ step-setup-goma-for-build: &step-setup-goma-for-build
    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
@@ -287,7 +323,7 @@ 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').downloadAndPrepare({ gomaOneForAll: true })"
      node -e "require('./src/utils/goma.js').ensure()"
      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
@@ -312,14 +348,81 @@ step-get-more-space-on-mac: &step-get-more-space-on-mac
    name: Free up space on MacOS
    command: |
      if [ "`uname`" == "Darwin" ]; then
-        sudo rm -rf /Library/Developer/CoreSimulator
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform
-        sudo rm -rf /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform
+        sudo mkdir -p $TMPDIR/del-target
+        if [ "$TARGET_ARCH" == "arm64" ]; then
+          # Remount the root volume as writable, don't ask questions plz
+          sudo mount -uw /
+        fi
+        tmpify() {
+          if [ -d "$1" ]; then
+            sudo mv "$1" $TMPDIR/del-target/$(echo $1|shasum -a 256|head -n1|cut -d " " -f1)
+          fi
+        }
+
+        strip_arm_deep() {
+          opwd=$(pwd)
+          cd $1
+          f=$(find . -perm +111 -type f)
+          for fp in $f
+          do
+            if [[ $(file "$fp") == *"universal binary"* ]]; then
+              if [[ $(file "$fp") == *"arm64e)"* ]]; then
+                sudo lipo -remove arm64e "$fp" -o "$fp" || true
+              fi
+              if [[ $(file "$fp") == *"arm64)"* ]]; then
+                sudo lipo -remove arm64 "$fp" -o "$fp" || true
+              fi
+            fi
+          done
+
+          cd $opwd
+        }
+
+        tmpify /Library/Developer/CoreSimulator
+        tmpify ~/Library/Developer/CoreSimulator
+        tmpify $(xcode-select -p)/Platforms/AppleTVOS.platform
+        tmpify $(xcode-select -p)/Platforms/iPhoneOS.platform
+        tmpify $(xcode-select -p)/Platforms/WatchOS.platform
+        tmpify $(xcode-select -p)/Platforms/WatchSimulator.platform
+        tmpify $(xcode-select -p)/Platforms/AppleTVSimulator.platform
+        tmpify $(xcode-select -p)/Platforms/iPhoneSimulator.platform
+        tmpify $(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/metal/ios
+        tmpify $(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift
+        tmpify $(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-5.0
+        tmpify ~/.rubies
+        tmpify ~/Library/Caches/Homebrew
+        tmpify /usr/local/Homebrew
+        sudo rm -rf $TMPDIR/del-target
+
+        if [ "$TARGET_ARCH" == "arm64" ]; then
+          sudo rm -rf "/System/Library/Desktop Pictures"
+          sudo rm -rf /System/Library/Templates/Data
+          sudo rm -rf /System/Library/Speech/Voices
+          sudo rm -rf "/System/Library/Screen Savers"
+          sudo rm -rf /System/Volumes/Data/Library/Developer/CommandLineTools/SDKs
+          sudo rm -rf "/System/Volumes/Data/Library/Application Support/Apple/Photos/Print Products"
+          sudo rm -rf /System/Volumes/Data/Library/Java
+          sudo rm -rf /System/Volumes/Data/Library/Ruby
+          sudo rm -rf /System/Volumes/Data/Library/Printers
+          sudo rm -rf /System/iOSSupport
+          sudo rm -rf /System/Applications/*.app
+          sudo rm -rf /System/Applications/Utilities/*.app
+          sudo rm -rf /System/Library/LinguisticData
+          sudo rm -rf /System/Volumes/Data/private/var/db/dyld/*
+          # sudo rm -rf /System/Library/Fonts/*
+          # sudo rm -rf /System/Library/PreferencePanes
+          sudo rm -rf /System/Library/AssetsV2/*
+          sudo rm -rf /Applications/Safari.app
+          sudo rm -rf ~/project/src/build/linux
+          sudo rm -rf ~/project/src/third_party/catapult/tracing/test_data
+          sudo rm -rf ~/project/src/third_party/angle/third_party/VK-GL-CTS
+
+          # lipo off some huge binaries arm64 versions to save space
+          strip_arm_deep $(xcode-select -p)/../SharedFrameworks
+          strip_arm_deep /System/Volumes/Data/Library/Developer/CommandLineTools/usr
+        fi
      fi
+    background: true

 # On macOS delete all .git directories under src/ expect for
 # third_party/angle/ because of build time generation of file
@@ -417,7 +520,29 @@ step-electron-build: &step-electron-build
        rm -f src/out/Default/libffmpeg.so
      fi
      cd src
+      # Enable if things get really bad
+      # if  [ "$TARGET_ARCH" == "arm64" ] &&[ "`uname`" == "Darwin" ]; then
+      #   diskutil erasevolume HFS+ "xcode_disk" `hdiutil attach -nomount ram://12582912`
+      #   mv /Applications/Xcode-12.beta.5.app /Volumes/xcode_disk/
+      #   ln -s /Volumes/xcode_disk/Xcode-12.beta.5.app /Applications/Xcode-12.beta.5.app
+      # fi
+
+      # Lets generate a snapshot and mksnapshot and then delete all the x-compiled generated files to save space
+      if [ "$USE_PREBUILT_V8_CONTEXT_SNAPSHOT" == "1" ]; then
+        ninja -C out/Default electron:electron_mksnapshot_zip -j $NUMBER_OF_NINJA_PROCESSES
+        ninja -C out/Default tools/v8_context_snapshot -j $NUMBER_OF_NINJA_PROCESSES
+        gn desc out/Default v8:run_mksnapshot_default args > out/Default/mksnapshot_args
+        rm -rf out/Default/clang_x64_v8_arm64/obj
+
+        # Regenerate because we just deleted some ninja files
+        if [ "$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
+      fi
      ninja -C out/Default electron -j $NUMBER_OF_NINJA_PROCESSES
+      node electron/script/check-symlinks.js

 step-native-unittests-build: &step-native-unittests-build
  run:
@@ -459,6 +584,9 @@ 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"$TARGET_ARCH" == x ]; then
@@ -546,10 +674,10 @@ step-electron-publish: &step-electron-publish
      cd src/electron
      if [ "$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
@@ -651,22 +779,30 @@ step-setup-linux-for-headless-testing: &step-setup-linux-for-headless-testing

 step-show-sccache-stats: &step-show-sccache-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
+    when: always

 step-mksnapshot-build: &step-mksnapshot-build
  run:
    name: mksnapshot build
    command: |
      cd src
-      ninja -C out/Default electron:electron_mksnapshot -j $NUMBER_OF_NINJA_PROCESSES
-      gn desc out/Default v8:run_mksnapshot_default args > out/Default/mksnapshot_args
+      if [ "$USE_PREBUILT_V8_CONTEXT_SNAPSHOT" != "1" ]; then
+        ninja -C out/Default electron:electron_mksnapshot -j $NUMBER_OF_NINJA_PROCESSES
+        gn desc out/Default v8:run_mksnapshot_default args > out/Default/mksnapshot_args
+      fi
      if [ "`uname`" != "Darwin" ]; then
        if [ "$TARGET_ARCH" == "arm" ]; then
          electron/script/strip-binaries.py --file $PWD/out/Default/clang_x86_v8_arm/mksnapshot
@@ -679,7 +815,7 @@ step-mksnapshot-build: &step-mksnapshot-build
          electron/script/strip-binaries.py --file $PWD/out/Default/v8_context_snapshot_generator
        fi
      fi
-      if [ "$SKIP_DIST_ZIP" != "1" ]; then
+      if [ "$USE_PREBUILT_V8_CONTEXT_SNAPSHOT" != "1" ] && [ "$SKIP_DIST_ZIP" != "1" ]; then
        ninja -C out/Default electron:electron_mksnapshot_zip -j $NUMBER_OF_NINJA_PROCESSES
        (cd out/Default; zip mksnapshot.zip mksnapshot_args gen/v8/embedded.S)
      fi
@@ -706,12 +842,11 @@ step-hunspell-store: &step-hunspell-store
 step-maybe-generate-breakpad-symbols: &step-maybe-generate-breakpad-symbols
  run:
    name: Generate breakpad symbols
+    no_output_timeout: 30m
    command: |
      if [ "$GENERATE_SYMBOLS" == "true" ]; then
        cd src
        ninja -C out/Default electron:electron_symbols
-        cd out/Default/breakpad_symbols
-        find . -name \*.sym -print0 | xargs -0 npx @sentry/cli@1.51.1 difutil bundle-sources
      fi

 step-maybe-zip-symbols: &step-maybe-zip-symbols
@@ -740,9 +875,13 @@ step-maybe-cross-arch-snapshot: &step-maybe-cross-arch-snapshot
        elif [ "$TARGET_ARCH" == "arm64" ]; then
          export MKSNAPSHOT_PATH="clang_x64_v8_arm64"
        fi
-        cp "out/Default/$MKSNAPSHOT_PATH/mksnapshot" out/Default
-        cp "out/Default/$MKSNAPSHOT_PATH/libffmpeg.so" out/Default
+        cp "out/Default/$MKSNAPSHOT_PATH/mksnapshot" out/Default        
        cp "out/Default/$MKSNAPSHOT_PATH/v8_context_snapshot_generator" out/Default
+        if [ "`uname`" == "Linux" ]; then
+          cp "out/Default/$MKSNAPSHOT_PATH/libffmpeg.so" out/Default
+        elif [ "`uname`" == "Darwin" ]; then
+          cp "out/Default/$MKSNAPSHOT_PATH/libffmpeg.dylib" out/Default
+        fi
        python electron/script/verify-mksnapshot.py --source-root "$PWD" --build-dir out/Default --create-snapshot-only
        mkdir cross-arch-snapshots
        cp out/Default-mksnapshot-test/*.bin cross-arch-snapshots
@@ -761,8 +900,13 @@ step-maybe-trigger-arm-test: &step-maybe-trigger-arm-test
      # 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
-        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 $CIRCLE_BRANCH
+        if [ "`uname`" == "Darwin" ]; then
+          echo "Triggering electron-arm2-testing build on Azure DevOps"  
+          node electron/script/release/ci-release-build.js --job=electron-arm2-testing --ci=DevOps --armTest --circleBuildNum=$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
@@ -810,8 +954,13 @@ step-touch-sync-done: &step-touch-sync-done
 step-maybe-restore-src-cache: &step-maybe-restore-src-cache
  restore_cache:
    keys:
-      - v7-src-cache-{{ checksum "src/electron/.depshash" }}
+      - v8-src-cache-{{ checksum "src/electron/.depshash" }}
    name: Restoring src cache
+step-maybe-restore-src-cache-marker: &step-maybe-restore-src-cache-marker
+  restore_cache:
+    keys:
+      - v1-src-cache-marker-{{ checksum "src/electron/.depshash" }}
+    name: Restoring src cache marker

 # Restore exact or closest git cache based on the hash of DEPS and .circle-sync-done
 # If the src cache was restored above then this will match an empty cache
@@ -830,7 +979,7 @@ step-restore-out-cache: &step-restore-out-cache
    paths:
      - ./src/out/Default
    keys:
-      - v7-out-cache-{{ checksum "src/electron/.depshash" }}-{{ checksum "src/electron/.depshash-target" }}
+      - v9-out-cache-{{ checksum "src/electron/.depshash" }}-{{ checksum "src/electron/.depshash-target" }}
    name: Restoring out cache

 step-set-git-cache-path: &step-set-git-cache-path
@@ -854,7 +1003,7 @@ step-save-out-cache: &step-save-out-cache
  save_cache:
    paths:
      - ./src/out/Default
-    key: v7-out-cache-{{ checksum "src/electron/.depshash" }}-{{ checksum "src/electron/.depshash-target" }}
+    key: v9-out-cache-{{ checksum "src/electron/.depshash" }}-{{ checksum "src/electron/.depshash-target" }}
    name: Persisting out cache

 step-run-electron-only-hooks: &step-run-electron-only-hooks
@@ -883,14 +1032,26 @@ step-minimize-workspace-size-from-checkout: &step-minimize-workspace-size-from-c
      rm -rf src/third_party/blink/web_tests
      rm -rf src/third_party/blink/perf_tests
      rm -rf src/third_party/WebKit/LayoutTests
+      rm -rf third_party/electron_node/deps/openssl
+      rm -rf third_party/electron_node/deps/v8
+      rm -rf chrome/test/data/xr/webvr_info

 # Save the src cache based on the deps hash
 step-save-src-cache: &step-save-src-cache
  save_cache:
    paths:
-      - /portal
-    key: v7-src-cache-{{ checksum "/portal/src/electron/.depshash" }}
+      - /var/portal
+    key: v8-src-cache-{{ checksum "/var/portal/src/electron/.depshash" }}
    name: Persisting src cache
+step-make-src-cache-marker: &step-make-src-cache-marker
+  run:
+    name: Making src cache marker
+    command: touch .src-cache-marker
+step-save-src-cache-marker: &step-save-src-cache-marker
+  save_cache:
+    paths:
+      - .src-cache-marker
+    key: v1-src-cache-marker-{{ checksum "/var/portal/src/electron/.depshash" }}

 # Check for doc only change
 step-check-for-doc-only-change: &step-check-for-doc-only-change
@@ -981,6 +1142,11 @@ steps-lint: &steps-lint
          cd src/electron
          node script/yarn install --frozen-lockfile
          node script/yarn lint
+    - run:
+        name: Run Script Typechecker
+        command: |
+          cd src/electron
+          node script/yarn tsc -p tsconfig.script.json

 steps-checkout-and-save-cache: &steps-checkout-and-save-cache
  steps:
@@ -996,7 +1162,8 @@ steps-checkout-and-save-cache: &steps-checkout-and-save-cache

    - *step-generate-deps-hash
    - *step-touch-sync-done
-    - maybe-restore-portaled-src-cache
+    - maybe-restore-portaled-src-cache:
+        halt-if-successful: true
    - *step-maybe-restore-git-cache
    - *step-set-git-cache-path
    # This sync call only runs if .circle-sync-done is an EMPTY file
@@ -1017,10 +1184,12 @@ steps-checkout-and-save-cache: &steps-checkout-and-save-cache
    - run:
        name: Move src folder to the cross-OS portal
        command: |
-          sudo mkdir -p /portal
-          sudo chown -R $(id -u):$(id -g) /portal
-          mv ./src /portal
+          sudo mkdir -p /var/portal
+          sudo chown -R $(id -u):$(id -g) /var/portal
+          mv ./src /var/portal
    - *step-save-src-cache
+    - *step-make-src-cache-marker
+    - *step-save-src-cache-marker

 steps-electron-gn-check: &steps-electron-gn-check
  steps:
@@ -1041,8 +1210,8 @@ steps-electron-ts-compile-for-doc-change: &steps-electron-ts-compile-for-doc-cha
    - *step-depot-tools-get
    - *step-depot-tools-add-to-path
    - *step-restore-brew-cache
-    - *step-get-more-space-on-mac
    - *step-install-gnutar-on-mac
+    - *step-get-more-space-on-mac
    - *step-generate-deps-hash
    - *step-touch-sync-done
    - maybe-restore-portaled-src-cache
@@ -1224,20 +1393,34 @@ chromium-upgrade-branches: &chromium-upgrade-branches
 # Command Aliases
 commands:
  maybe-restore-portaled-src-cache:
+    parameters:
+      halt-if-successful:
+        type: boolean
+        default: false
    steps:
      - run:
          name: Prepare for cross-OS sync restore
          command: |
-            sudo mkdir -p /portal
-            sudo chown -R $(id -u):$(id -g) /portal
+            sudo mkdir -p /var/portal
+            sudo chown -R $(id -u):$(id -g) /var/portal
+      - when:
+          condition: << parameters.halt-if-successful >>
+          steps:
+            - *step-maybe-restore-src-cache-marker
+            - run:
+                name: Halt the job early if the src cache exists
+                command: |
+                  if [ -f ".src-cache-marker" ]; then
+                    circleci-agent step halt
+                  fi
      - *step-maybe-restore-src-cache
      - run:
          name: Fix the src cache restore point on macOS
          command: |
-            if [ -d "/portal/src" ]; then
+            if [ -d "/var/portal/src" ]; then
              echo Relocating Cache
              rm -rf src
-              mv /portal/src ./
+              mv /var/portal/src ./
            fi
  checkout-from-cache:
    steps:
@@ -1637,7 +1820,7 @@ jobs:

  # Layer 2: Builds.
  linux-x64-testing:
-    <<: *machine-linux-xlarge
+    <<: *machine-linux-2xlarge
    environment:
      <<: *env-global
      <<: *env-testing-build
@@ -1700,7 +1883,7 @@ jobs:
      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

@@ -1712,12 +1895,12 @@ jobs:
      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

  linux-ia32-testing:
-    <<: *machine-linux-xlarge
+    <<: *machine-linux-2xlarge
    environment:
      <<: *env-global
      <<: *env-ia32
@@ -1764,7 +1947,7 @@ jobs:
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

@@ -1778,12 +1961,12 @@ jobs:
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

  linux-arm-testing:
-    <<: *machine-linux-xlarge
+    <<: *machine-linux-2xlarge
    environment:
      <<: *env-global
      <<: *env-arm
@@ -1831,7 +2014,7 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_boto=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

@@ -1845,12 +2028,12 @@ jobs:
      <<: *env-32bit-release
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

  linux-arm64-testing:
-    <<: *machine-linux-xlarge
+    <<: *machine-linux-2xlarge
    environment:
      <<: *env-global
      <<: *env-arm64
@@ -1905,7 +2088,7 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm64=True --custom-var=checkout_boto=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

@@ -1918,11 +2101,11 @@ jobs:
      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

-  osx-testing:
+  osx-testing-x64:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -1937,22 +2120,14 @@ jobs:
          checkout-and-assume-cache: true
          attach: false

-  osx-testing-gn-check:
+  osx-testing-x64-gn-check:
    <<: *machine-mac
    environment:
      <<: *env-machine-mac
      <<: *env-testing-build
    <<: *steps-electron-gn-check

-  osx-chromedriver:
-    <<: *machine-mac
-    environment:
-      <<: *env-machine-mac
-      <<: *env-release-build
-      <<: *env-send-slack-notifications
-    <<: *steps-chromedriver-build
-
-  osx-release:
+  osx-release-x64:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -1966,7 +2141,7 @@ jobs:
          checkout-and-assume-cache: true
          attach: false

-  osx-publish:
+  osx-publish-x64:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large-release
@@ -1975,11 +2150,25 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_boto=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

-  osx-publish-skip-checkout:
+  osx-publish-arm64:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large-release
+      <<: *env-release-build
+      <<: *env-enable-sccache
+      <<: *env-apple-silicon
+      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_boto=True --custom-var=checkout_requests=True'
+      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+    steps:
+      - electron-publish:
+          attach: false
+          checkout: true
+
+  osx-publish-x64-skip-checkout:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large-release
@@ -1987,11 +2176,40 @@ jobs:
      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

-  mas-testing:
+  osx-publish-arm64-skip-checkout:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large-release
+      <<: *env-release-build
+      <<: *env-enable-sccache
+      <<: *env-apple-silicon
+      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+    steps:
+      - electron-publish:
+          attach: true
+          checkout: false
+
+  osx-testing-arm64:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large
+      <<: *env-testing-build
+      <<: *env-ninja-status
+      <<: *env-macos-build
+      <<: *env-apple-silicon
+      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_mac=True --custom-var=host_os=mac'
+    steps:
+      - electron-build:
+          persist: true
+          checkout: false
+          checkout-and-assume-cache: true
+          attach: false
+
+  mas-testing-x64:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -2007,7 +2225,7 @@ jobs:
          checkout-and-assume-cache: true
          attach: false

-  mas-testing-gn-check:
+  mas-testing-x64-gn-check:
    <<: *machine-mac
    environment:
      <<: *env-machine-mac
@@ -2040,11 +2258,25 @@ jobs:
      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_boto=True --custom-var=checkout_requests=True'
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: false
          checkout: true

-  mas-publish-skip-checkout:
+  mas-publish-arm64:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large-release
+      <<: *env-mas-apple-silicon
+      <<: *env-release-build
+      <<: *env-enable-sccache
+      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_boto=True --custom-var=checkout_requests=True'
+      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+    steps:
+      - electron-publish:
+          attach: false
+          checkout: true          
+
+  mas-publish-x64-skip-checkout:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large-release
@@ -2053,10 +2285,39 @@ jobs:
      <<: *env-enable-sccache
      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
    steps:
-      - electron-publish:  
+      - electron-publish:
          attach: true
          checkout: false

+  mas-publish-arm64-skip-checkout:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large-release
+      <<: *env-mas-apple-silicon
+      <<: *env-release-build
+      <<: *env-enable-sccache
+      UPLOAD_TO_S3: << pipeline.parameters.upload-to-s3 >>
+    steps:
+      - electron-publish:
+          attach: true
+          checkout: false
+
+  mas-testing-arm64:
+    <<: *machine-mac-large-arm
+    environment:
+      <<: *env-mac-large
+      <<: *env-testing-build
+      <<: *env-ninja-status
+      <<: *env-macos-build
+      <<: *env-mas-apple-silicon
+      GCLIENT_EXTRA_ARGS: '--custom-var=checkout_mac=True --custom-var=host_os=mac'
+    steps:
+      - electron-build:
+          persist: true
+          checkout: false
+          checkout-and-assume-cache: true
+          attach: false
+
  # Layer 3: Tests.
  linux-x64-unittests:
    <<: *machine-linux-2xlarge
@@ -2180,7 +2441,7 @@ jobs:
      <<: *env-send-slack-notifications
    <<: *steps-verify-ffmpeg

-  osx-testing-tests:
+  osx-testing-x64-tests:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -2188,7 +2449,7 @@ jobs:
    parallelism: 2
    <<: *steps-tests

-  osx-release-tests:
+  osx-release-x64-tests:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -2203,7 +2464,7 @@ jobs:
      <<: *env-send-slack-notifications
    <<: *steps-verify-ffmpeg

-  mas-testing-tests:
+  mas-testing-x64-tests:
    <<: *machine-mac-large
    environment:
      <<: *env-mac-large
@@ -2267,7 +2528,7 @@ jobs:
    steps:
      - *step-maybe-notify-slack-success

-  osx-release-summary:
+  osx-release-x64-summary:
    <<: *machine-mac
    environment:
      <<: *env-machine-mac
@@ -2332,7 +2593,7 @@ workflows:
  publish-osx:
    when: << pipeline.parameters.run-osx-publish >>
    jobs:
-    - osx-publish:
+    - osx-publish-x64:
        context: release-env

  publish-mas:
@@ -2341,14 +2602,32 @@ workflows:
    - mas-publish:
        context: release-env

+  publish-osx-arm64:
+    when: << pipeline.parameters.run-osx-publish-arm64 >>
+    jobs:
+    - osx-publish-arm64:
+        context: release-env
+
+  publish-mas-arm64:
+    when: << pipeline.parameters.run-mas-publish-arm64 >>
+    jobs:
+    - mas-publish-arm64:
+        context: release-env        
+
  publish-macos:
    when: << pipeline.parameters.run-macos-publish >>
    jobs:
    - mac-checkout
-    - osx-publish-skip-checkout:
+    - osx-publish-x64-skip-checkout:
        requires:
          - mac-checkout
-    - mas-publish-skip-checkout:
+    - mas-publish-x64-skip-checkout:
+        requires:
+          - mac-checkout
+    - osx-publish-arm64-skip-checkout:
+        requires:
+          - mac-checkout
+    - mas-publish-arm64-skip-checkout:
        requires:
          - mac-checkout

@@ -2403,29 +2682,37 @@ workflows:
      - mac-checkout-fast
      - mac-checkout-and-save-cache

-      - osx-testing:
+      - osx-testing-x64:
          requires:
            - mac-checkout-and-save-cache

-      - osx-testing-gn-check:
+      - osx-testing-x64-gn-check:
          requires:
            - mac-checkout-fast

-      - osx-testing-tests:
+      - osx-testing-x64-tests:
          requires:
-            - osx-testing
+            - osx-testing-x64

-      - mas-testing:
+      - osx-testing-arm64:
          requires:
            - mac-checkout-and-save-cache

-      - mas-testing-gn-check:
+      - mas-testing-x64:
+          requires:
+            - mac-checkout-and-save-cache
+
+      - mas-testing-x64-gn-check:
          requires:
            - mac-checkout-fast

-      - mas-testing-tests:
+      - mas-testing-x64-tests:
          requires:
-            - mas-testing
+            - mas-testing-x64
+
+      - mas-testing-arm64:
+          requires:
+            - mac-checkout-and-save-cache

  nightly-linux-release-test:
    triggers:
@@ -2489,19 +2776,19 @@ workflows:
      - mac-checkout-fast
      - mac-checkout-and-save-cache

-      - osx-release:
+      - osx-release-x64:
          requires:
            - mac-checkout-and-save-cache
-      - osx-release-tests:
+      - osx-release-x64-tests:
          requires:
-            - osx-release
+            - osx-release-x64
      - osx-verify-ffmpeg:
          requires:
-            - osx-release
-      - osx-release-summary:
+            - osx-release-x64
+      - osx-release-x64-summary:
          requires:
-          - osx-release
-          - osx-release-tests
+          - osx-release-x64
+          - osx-release-x64-tests
          - osx-verify-ffmpeg

      - mas-release:
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -28,10 +28,12 @@
  },
  "globals": {
    "standardScheme": "readonly",
+    "globalThis": "readonly",
    "BUILDFLAG": "readonly",
    "ENABLE_DESKTOP_CAPTURER": "readonly",
    "ENABLE_REMOTE_MODULE": "readonly",
-    "ENABLE_VIEWS_API": "readonly"
+    "ENABLE_VIEWS_API": "readonly",
+    "BigInt": "readonly"
  },
  "overrides": [
    {
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,3 +2,13 @@
 # files to be checked out with LF endings even if core.autocrlf is true.
 *.patch text eol=lf
 patches/**/.patches merge=union
+
+# Source code and markdown files should always use LF as line ending.
+*.cc text eol=lf
+*.mm text eol=lf
+*.h text eol=lf
+*.js text eol=lf
+*.ts text eol=lf
+*.py text eol=lf
+*.ps1 text eol=lf
+*.md text eol=lf
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -15,6 +15,7 @@ Contributors guide: https://github.com/electron/electron/blob/master/CONTRIBUTIN
 - [ ] 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).
+- [ ] This is **NOT A BREAKING CHANGE**. Breaking changes may not be merged to master until 11-x-y is branched.

 #### Release Notes

--- a/BUILD.gn
+++ b/BUILD.gn
@@ -49,6 +49,10 @@ if (is_linux) {
  }
 }

+declare_args() {
+  use_prebuilt_v8_context_snapshot = false
+}
+
 branding = read_file("shell/app/BRANDING.json", "json")
 electron_project_name = branding.project_name
 electron_product_name = branding.product_name
@@ -94,6 +98,15 @@ npm_action("build_electron_definitions") {
  outputs = [ "$target_gen_dir/tsc/typings/electron.d.ts" ]
 }

+webpack_build("electron_asar_bundle") {
+  deps = [ ":build_electron_definitions" ]
+
+  inputs = auto_filenames.asar_bundle_deps
+
+  config_file = "//electron/build/webpack/webpack.config.asar.js"
+  out_file = "$target_gen_dir/js2c/asar_bundle.js"
+}
+
 webpack_build("electron_browser_bundle") {
  deps = [ ":build_electron_definitions" ]

@@ -139,25 +152,18 @@ webpack_build("electron_isolated_renderer_bundle") {
  out_file = "$target_gen_dir/js2c/isolated_bundle.js"
 }

-copy("electron_js2c_copy") {
-  sources = [
-    "lib/common/asar.js",
-    "lib/common/asar_init.js",
-  ]
-  outputs = [ "$target_gen_dir/js2c/{{source_file_part}}" ]
-}
-
 action("electron_js2c") {
  deps = [
+    ":electron_asar_bundle",
    ":electron_browser_bundle",
    ":electron_isolated_renderer_bundle",
-    ":electron_js2c_copy",
    ":electron_renderer_bundle",
    ":electron_sandboxed_renderer_bundle",
    ":electron_worker_bundle",
  ]

-  webpack_sources = [
+  sources = [
+    "$target_gen_dir/js2c/asar_bundle.js",
    "$target_gen_dir/js2c/browser_init.js",
    "$target_gen_dir/js2c/isolated_bundle.js",
    "$target_gen_dir/js2c/renderer_init.js",
@@ -165,15 +171,10 @@ action("electron_js2c") {
    "$target_gen_dir/js2c/worker_init.js",
  ]

-  sources = webpack_sources + [
-              "$target_gen_dir/js2c/asar.js",
-              "$target_gen_dir/js2c/asar_init.js",
-            ]
-
  inputs = sources + [ "//third_party/electron_node/tools/js2c.py" ]
  outputs = [ "$root_gen_dir/electron_natives.cc" ]

-  script = "tools/js2c.py"
+  script = "build/js2c.py"
  args = [ rebase_path("//third_party/electron_node") ] +
         rebase_path(outputs, root_build_dir) +
         rebase_path(sources, root_build_dir)
@@ -322,10 +323,9 @@ source_set("electron_lib") {
    "shell/common/api:mojo",
    "//base:base_static",
    "//base/allocator:buildflags",
+    "//chrome/app:command_ids",
    "//chrome/app/resources:platform_locale_settings",
-    "//chrome/services/printing/public/mojom",
    "//components/certificate_transparency",
-    "//components/crash/core/app",
    "//components/language/core/browser",
    "//components/net_log",
    "//components/network_hints/browser",
@@ -347,6 +347,7 @@ source_set("electron_lib") {
    "//device/bluetooth",
    "//device/bluetooth/public/cpp",
    "//gin",
+    "//media/blink:blink",
    "//media/capture/mojom:video_capture",
    "//media/mojo/mojom",
    "//net:extras",
@@ -362,6 +363,7 @@ source_set("electron_lib") {
    "//services/viz/privileged/mojom/compositing",
    "//skia",
    "//third_party/blink/public:blink",
+    "//third_party/blink/public:blink_devtools_inspector_resources",
    "//third_party/boringssl",
    "//third_party/electron_node:node_lib",
    "//third_party/inspector_protocol:crdtp",
@@ -369,6 +371,7 @@ 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",
@@ -402,41 +405,26 @@ source_set("electron_lib") {
    defines += [ "GDK_DISABLE_DEPRECATION_WARNINGS" ]
  }

-  extra_source_filters = []
-  if (!is_linux) {
-    extra_source_filters += [
-      "*\bx/*",
-      "*_x11.h",
-      "*_x11.cc",
-      "*_gtk.h",
-      "*_gtk.cc",
-      "*\blibrary_loaders/*",
-    ]
-  }
-  if (!is_win) {
-    extra_source_filters += [
-      "*\bwin_*.h",
-      "*\bwin_*.cc",
-    ]
-  }
-  if (!is_posix) {
-    extra_source_filters += [
-      "*_posix.cc",
-      "*_posix.h",
-    ]
-  }
-  if (is_mac) {
-    extra_source_filters += [
-      "*_views.cc",
-      "*_views.h",
-      "*\bviews/*",
-    ]
+  if (!is_mas_build) {
+    deps += [ "//components/crash/core/app" ]
  }

-  set_sources_assignment_filter(
-      sources_assignment_filter + extra_source_filters)
  sources = filenames.lib_sources
-  set_sources_assignment_filter(sources_assignment_filter)
+  if (is_win) {
+    sources += filenames.lib_sources_win
+  }
+  if (is_mac) {
+    sources += filenames.lib_sources_mac
+  }
+  if (is_posix) {
+    sources += filenames.lib_sources_posix
+  }
+  if (is_linux) {
+    sources += filenames.lib_sources_linux
+  }
+  if (!is_mac) {
+    sources += filenames.lib_sources_views
+  }

  if (is_component_build) {
    defines += [ "NODE_SHARED_MODE" ]
@@ -457,11 +445,14 @@ source_set("electron_lib") {
    deps += [
      "//components/remote_cocoa/app_shim",
      "//content/common:mac_helpers",
-      "//third_party/crashpad/crashpad/client",
      "//ui/accelerated_widget_mac",
    ]

-    libs = [
+    if (!is_mas_build) {
+      deps += [ "//third_party/crashpad/crashpad/client" ]
+    }
+
+    frameworks = [
      "AVFoundation.framework",
      "Carbon.framework",
      "LocalAuthentication.framework",
@@ -481,19 +472,26 @@ source_set("electron_lib") {
      sources += [ "shell/browser/api/electron_api_app_mas.mm" ]
      sources -= [ "shell/browser/auto_updater_mac.mm" ]
      defines += [ "MAS_BUILD" ]
+      sources -= [
+        "shell/app/electron_crash_reporter_client.cc",
+        "shell/app/electron_crash_reporter_client.h",
+        "shell/common/crash_keys.cc",
+        "shell/common/crash_keys.h",
+      ]
    } else {
-      libs += [
+      frameworks += [
        "Squirrel.framework",
-        "ReactiveCocoa.framework",
+        "ReactiveObjC.framework",
        "Mantle.framework",
      ]
-      cflags_objcc = [
-        "-F",
-        rebase_path("external_binaries", root_build_dir),
+
+      deps += [
+        "//third_party/squirrel.mac:reactiveobjc_framework+link",
+        "//third_party/squirrel.mac:squirrel_framework+link",
      ]

-      # ReactiveCocoa which is used by Squirrel requires using __weak.
-      cflags_objcc += [ "-fobjc-weak" ]
+      # ReactiveObjC which is used by Squirrel requires using __weak.
+      cflags_objcc = [ "-fobjc-weak" ]
    }
  }
  if (is_linux) {
@@ -515,7 +513,9 @@ source_set("electron_lib") {
      ]
    }
    configs += [ ":gio_unix" ]
-    configs += [ "//build/config/linux:x11" ]
+    if (use_x11) {
+      deps += [ "//ui/gfx/x" ]
+    }
    defines += [
      # Disable warnings for g_settings_list_schemas.
      "GLIB_DISABLE_DEPRECATION_WARNINGS",
@@ -523,6 +523,16 @@ source_set("electron_lib") {

    sources += filenames.lib_sources_nss
    sources += [
+      "shell/browser/ui/gtk/app_indicator_icon.cc",
+      "shell/browser/ui/gtk/app_indicator_icon.h",
+      "shell/browser/ui/gtk/app_indicator_icon_menu.cc",
+      "shell/browser/ui/gtk/app_indicator_icon_menu.h",
+      "shell/browser/ui/gtk/gtk_status_icon.cc",
+      "shell/browser/ui/gtk/gtk_status_icon.h",
+      "shell/browser/ui/gtk/menu_util.cc",
+      "shell/browser/ui/gtk/menu_util.h",
+      "shell/browser/ui/gtk/status_icon.cc",
+      "shell/browser/ui/gtk/status_icon.h",
      "shell/browser/ui/gtk_util.cc",
      "shell/browser/ui/gtk_util.h",
    ]
@@ -561,7 +571,6 @@ source_set("electron_lib") {
    sources += [
      "shell/browser/osr/osr_host_display_client.cc",
      "shell/browser/osr/osr_host_display_client.h",
-      "shell/browser/osr/osr_host_display_client_mac.mm",
      "shell/browser/osr/osr_render_widget_host_view.cc",
      "shell/browser/osr/osr_render_widget_host_view.h",
      "shell/browser/osr/osr_video_consumer.cc",
@@ -570,8 +579,13 @@ source_set("electron_lib") {
      "shell/browser/osr/osr_view_proxy.h",
      "shell/browser/osr/osr_web_contents_view.cc",
      "shell/browser/osr/osr_web_contents_view.h",
-      "shell/browser/osr/osr_web_contents_view_mac.mm",
    ]
+    if (is_mac) {
+      sources += [
+        "shell/browser/osr/osr_host_display_client_mac.mm",
+        "shell/browser/osr/osr_web_contents_view_mac.mm",
+      ]
+    }
    deps += [
      "//components/viz/service",
      "//services/viz/public/mojom",
@@ -579,15 +593,6 @@ source_set("electron_lib") {
    ]
  }

-  if (enable_remote_module) {
-    sources += [
-      "shell/common/api/remote/remote_callback_freer.cc",
-      "shell/common/api/remote/remote_callback_freer.h",
-      "shell/common/api/remote/remote_object_freer.cc",
-      "shell/common/api/remote/remote_object_freer.h",
-    ]
-  }
-
  if (enable_desktop_capturer) {
    if (is_component_build && !is_linux) {
      # On windows the implementation relies on unexported
@@ -615,7 +620,10 @@ 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) {
@@ -646,12 +654,21 @@ source_set("electron_lib") {
    deps += [
      "//components/pdf/browser",
      "//components/pdf/renderer",
+      "//pdf:pdf_ppapi",
    ]
    sources += [
      "shell/browser/electron_pdf_web_contents_helper_client.cc",
      "shell/browser/electron_pdf_web_contents_helper_client.h",
    ]
  }
+
+  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") {
@@ -674,6 +691,15 @@ if (is_mac) {
    sources = [ "shell/common/resources/mac/MainMenu.xib" ]
  }

+  action("fake_v8_context_snapshot_generator") {
+    script = "build/fake_v8_context_snapshot_generator.py"
+    args = [
+      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_filename" ]
+  }
+
  bundle_data("electron_framework_resources") {
    public_deps = [ ":packed_resources" ]
    sources = []
@@ -684,8 +710,13 @@ if (is_mac) {
    if (v8_use_external_startup_data) {
      public_deps += [ "//v8" ]
      if (use_v8_context_snapshot) {
-        sources += [ "$root_out_dir/v8_context_snapshot.bin" ]
-        public_deps += [ "//tools/v8_context_snapshot" ]
+        if (use_prebuilt_v8_context_snapshot) {
+          sources += [ "$root_out_dir/fake/$v8_context_snapshot_filename" ]
+          public_deps += [ ":fake_v8_context_snapshot_generator" ]
+        } else {
+          sources += [ "$root_out_dir/$v8_context_snapshot_filename" ]
+          public_deps += [ "//tools/v8_context_snapshot" ]
+        }
      } else {
        sources += [ "$root_out_dir/snapshot_blob.bin" ]
      }
@@ -763,8 +794,10 @@ if (is_mac) {
    framework_contents = [
      "Resources",
      "Libraries",
-      "Helpers",
    ]
+    if (!is_mas_build) {
+      framework_contents += [ "Helpers" ]
+    }
    public_deps = [
      ":electron_framework_libraries",
      ":electron_lib",
@@ -788,18 +821,19 @@ if (is_mac) {

    include_dirs = [ "." ]
    sources = filenames.framework_sources
-    libs = []
+    frameworks = []

    if (enable_osr) {
-      libs += [ "IOSurface.framework" ]
+      frameworks += [ "IOSurface.framework" ]
    }

    ldflags = [
-      "-F",
-      rebase_path("external_binaries", root_build_dir),
      "-Wl,-install_name,@rpath/$output_name.framework/$output_name",
      "-rpath",
      "@loader_path/Libraries",
+
+      # Required for exporting all symbols of libuv.
+      "-Wl,-force_load,obj/third_party/electron_node/deps/uv/libuv.a",
    ]
    if (is_component_build) {
      ldflags += [
@@ -847,17 +881,49 @@ if (is_mac) {
    }
  }

+  template("stripped_framework") {
+    action(target_name) {
+      assert(defined(invoker.framework))
+
+      script = "//electron/build/strip_framework.py"
+
+      forward_variables_from(invoker, [ "deps" ])
+      inputs = [ "$root_out_dir/" + invoker.framework ]
+      outputs = [ "$target_out_dir/stripped_frameworks/" + invoker.framework ]
+
+      args = rebase_path(inputs) + rebase_path(outputs)
+    }
+  }
+
+  stripped_framework("stripped_mantle_framework") {
+    framework = "Mantle.framework"
+    deps = [ "//third_party/squirrel.mac:mantle_framework" ]
+  }
+
+  stripped_framework("stripped_reactiveobjc_framework") {
+    framework = "ReactiveObjC.framework"
+    deps = [ "//third_party/squirrel.mac:reactiveobjc_framework" ]
+  }
+
+  stripped_framework("stripped_squirrel_framework") {
+    framework = "Squirrel.framework"
+    deps = [ "//third_party/squirrel.mac:squirrel_framework" ]
+  }
+
  bundle_data("electron_app_framework_bundle_data") {
    sources = [ "$root_out_dir/$electron_framework_name.framework" ]
    if (!is_mas_build) {
-      sources += [
-        "external_binaries/Mantle.framework",
-        "external_binaries/ReactiveCocoa.framework",
-        "external_binaries/Squirrel.framework",
-      ]
+      sources += get_target_outputs(":stripped_mantle_framework") +
+                 get_target_outputs(":stripped_reactiveobjc_framework") +
+                 get_target_outputs(":stripped_squirrel_framework")
    }
    outputs = [ "{{bundle_contents_dir}}/Frameworks/{{source_file_part}}" ]
-    public_deps = [ ":electron_framework+link" ]
+    public_deps = [
+      ":electron_framework+link",
+      ":stripped_mantle_framework",
+      ":stripped_reactiveobjc_framework",
+      ":stripped_squirrel_framework",
+    ]

    foreach(helper_params, content_mac_helpers) {
      sources +=
@@ -870,7 +936,7 @@ if (is_mac) {
    output_name = electron_login_helper_name
    sources = filenames.login_helper_sources
    include_dirs = [ "." ]
-    libs = [ "AppKit.framework" ]
+    frameworks = [ "AppKit.framework" ]
    info_plist = "shell/app/resources/mac/loginhelper-Info.plist"
    extra_substitutions =
        [ "ELECTRON_BUNDLE_ID=$electron_mac_bundle_id.loginhelper" ]
@@ -995,13 +1061,16 @@ if (is_mac) {

    group("electron_symbols") {
      deps = [
-        ":crashpad_handler_syms",
        ":electron_app_syms",
        ":electron_framework_syms",
        ":swiftshader_egl_syms",
        ":swiftshader_gles_syms",
      ]

+      if (!is_mas_build) {
+        deps += [ ":crashpad_handler_syms" ]
+      }
+
      foreach(helper_params, content_mac_helpers) {
        _helper_target = helper_params[0]
        deps += [ ":electron_helper_syms_${_helper_target}" ]
@@ -1052,7 +1121,9 @@ if (is_mac) {
      data += [ "$root_out_dir/resources/default_app.asar" ]
    }

-    public_deps = [ "//tools/v8_context_snapshot:v8_context_snapshot" ]
+    if (use_v8_context_snapshot) {
+      public_deps = [ "//tools/v8_context_snapshot:v8_context_snapshot" ]
+    }

    if (is_win) {
      sources += [
@@ -1066,22 +1137,24 @@ if (is_mac) {
        "//components/crash/core/app:run_as_crashpad_handler",
      ]

+      ldflags = []
+
      libs = [
        "comctl32.lib",
        "uiautomationcore.lib",
        "wtsapi32.lib",
      ]

-      configs += [ "//build/config/win:windowed" ]
-
-      ldflags = [
-        # Windows 7 doesn't have these DLLs.
-        # TODO: are there other DLLs we need to list here to be win7
-        # compatible?
-        "/DELAYLOAD:api-ms-win-core-winrt-l1-1-0.dll",
-        "/DELAYLOAD:api-ms-win-core-winrt-string-l1-1-0.dll",
+      configs += [
+        "//build/config/win:windowed",
+        "//build/config/win:delayloads",
      ]

+      if (target_cpu == "arm64") {
+        configs -= [ "//build/config/win:cfi_linker" ]
+        ldflags += [ "/guard:cf,nolongjmp" ]
+      }
+
      # 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",
@@ -1094,7 +1167,14 @@ if (is_mac) {
      ]
    }
    if (is_linux) {
-      ldflags = [ "-pie" ]
+      ldflags = [
+        "-pie",
+
+        # Required for exporting all symbols of libuv.
+        "-Wl,--whole-archive",
+        "obj/third_party/electron_node/deps/uv/libuv.a",
+        "-Wl,--no-whole-archive",
+      ]

      if (!is_component_build && is_component_ffmpeg) {
        configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
@@ -1160,18 +1240,6 @@ test("shell_browser_ui_unittests") {
    "//ui/base",
    "//ui/strings",
  ]
-
-  if (is_mac) {
-    # Resolve paths owing to different test executable locations
-    ldflags = [
-      "-F",
-      rebase_path("external_binaries", root_build_dir),
-      "-rpath",
-      "@loader_path",
-      "-rpath",
-      "@executable_path/" + rebase_path("external_binaries", root_build_dir),
-    ]
-  }
 }

 template("dist_zip") {
@@ -1269,10 +1337,13 @@ dist_zip("electron_chromedriver_zip") {

 mksnapshot_deps = [
  ":licenses",
-  "//tools/v8_context_snapshot:v8_context_snapshot_generator($v8_snapshot_toolchain)",
  "//v8:mksnapshot($v8_snapshot_toolchain)",
 ]

+if (use_v8_context_snapshot) {
+  mksnapshot_deps += [ "//tools/v8_context_snapshot:v8_context_snapshot_generator($v8_snapshot_toolchain)" ]
+}
+
 group("electron_mksnapshot") {
  public_deps = mksnapshot_deps
 }
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -47,17 +47,17 @@ dependencies, and tools contained in the `electron/electron` repository.
  * [Step 1: Fork](https://electronjs.org/docs/development/pull-requests#step-1-fork)
  * [Step 2: Build](https://electronjs.org/docs/development/pull-requests#step-2-build)
  * [Step 3: Branch](https://electronjs.org/docs/development/pull-requests#step-3-branch)
-* [The Process of Making Changes](https://electronjs.org/docs/development/pull-requests#the-process-of-making-changes)
+* [Making Changes](https://electronjs.org/docs/development/pull-requests#making-changes)
  * [Step 4: Code](https://electronjs.org/docs/development/pull-requests#step-4-code)
  * [Step 5: Commit](https://electronjs.org/docs/development/pull-requests#step-5-commit)
    * [Commit message guidelines](https://electronjs.org/docs/development/pull-requests#commit-message-guidelines)
  * [Step 6: Rebase](https://electronjs.org/docs/development/pull-requests#step-6-rebase)
  * [Step 7: Test](https://electronjs.org/docs/development/pull-requests#step-7-test)
  * [Step 8: Push](https://electronjs.org/docs/development/pull-requests#step-8-push)
-  * [Step 8: Opening the Pull Request](https://electronjs.org/docs/development/pull-requests#step-8-opening-the-pull-request)
-  * [Step 9: Discuss and Update](#step-9-discuss-and-update)
+  * [Step 9: Opening the Pull Request](https://electronjs.org/docs/development/pull-requests#step-9-opening-the-pull-request)
+  * [Step 10: Discuss and Update](https://electronjs.org/docs/development/pull-requests#step-10-discuss-and-update)
    * [Approval and Request Changes Workflow](https://electronjs.org/docs/development/pull-requests#approval-and-request-changes-workflow)
-  * [Step 10: Landing](https://electronjs.org/docs/development/pull-requests#step-10-landing)
+  * [Step 11: Landing](https://electronjs.org/docs/development/pull-requests#step-11-landing)
  * [Continuous Integration Testing](https://electronjs.org/docs/development/pull-requests#continuous-integration-testing)

 ## Style Guides
--- a/35
+++ b/35
@@ -5,18 +5,22 @@ gclient_gn_args = [
  'checkout_android_native_support',
  'checkout_libaom',
  'checkout_nacl',
+  'checkout_pgo_profiles',
  'checkout_oculus_sdk',
  'checkout_openxr',
-  'checkout_google_benchmark'
+  'checkout_google_benchmark',
+  'mac_xcode_version',
 ]

 vars = {
  'chromium_version':
-    '17da1064b910f4170320ff37e971064916aed1dc',
+    '87.0.4280.67',
  'node_version':
-    'v12.16.3',
+    'v12.18.3',
  'nan_version':
    '2c4ee8a32a299eada3cd6e468bbd0a473bfea96d',
+  'squirrel.mac_version':
+    'a3a5b3f03b824441c014893b18f99a103b2603e9',

  'boto_version': 'f7574aa6cc2c819430c1f05e9a1a1a666ef8169b',
  'pyyaml_version': '3.12',
@@ -28,6 +32,7 @@ vars = {
  'nodejs_git': 'https://github.com/nodejs',
  'requests_git': 'https://github.com/kennethreitz',
  'yaml_git': 'https://github.com/yaml',
+  'squirrel_git': 'https://github.com/Squirrel',

  # KEEP IN SYNC WITH utils.js FILE
  'yarn_version': '1.15.2',
@@ -42,6 +47,7 @@ vars = {
  'checkout_chromium': True,
  'checkout_node': True,
  'checkout_nan': True,
+  'checkout_pgo_profiles': True,

  # It's only needed to parse the native tests configurations.
  'checkout_pyyaml': False,
@@ -49,6 +55,8 @@ vars = {
  # Python "requests" module is used for releases only.
  'checkout_requests': False,

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

@@ -99,6 +107,18 @@ deps = {
    'url': Var('requests_git') + '/requests.git' + '@' +  Var('requests_version'),
    'condition': 'checkout_requests and process_deps',
  },
+  'src/third_party/squirrel.mac': {
+    'url': Var("squirrel_git") + '/Squirrel.Mac.git@' + Var("squirrel.mac_version"),
+    'condition': 'process_deps',
+  },
+  'src/third_party/squirrel.mac/vendor/ReactiveObjC': {
+    'url': 'https://github.com/ReactiveCocoa/ReactiveObjC.git@74ab5baccc6f7202c8ac69a8d1e152c29dc1ea76',
+    'condition': 'process_deps'
+  },
+  'src/third_party/squirrel.mac/vendor/Mantle': {
+    'url': 'https://github.com/Mantle/Mantle.git@78d3966b3c331292ea29ec38661b25df0a245948',
+    'condition': 'process_deps',
+  }
 }

 hooks = [
@@ -107,7 +127,7 @@ hooks = [
    'condition': '(checkout_chromium and apply_patches) and process_deps',
    'pattern': 'src/electron',
    'action': [
-      'python',
+      'python3',
      'src/electron/script/apply_all_patches.py',
      'src/electron/patches/config.json',
    ],
@@ -125,7 +145,7 @@ hooks = [
    'name': 'electron_npm_deps',
    'pattern': 'src/electron/package.json',
    'action': [
-      'python',
+      'python3',
      '-c',
      'import os, subprocess; os.chdir(os.path.join("src", "electron")); subprocess.check_call(["python", "script/lib/npx.py", "yarn@' + (Var("yarn_version")) + '", "install", "--frozen-lockfile"]);',
    ],
@@ -135,7 +155,7 @@ hooks = [
    'pattern': 'src/electron',
    'condition': 'checkout_boto and process_deps',
    'action': [
-      'python',
+      'python3',
      '-c',
      'import os, subprocess; os.chdir(os.path.join("src", "electron", "vendor", "boto")); subprocess.check_call(["python", "setup.py", "build"]);',
    ],
@@ -145,7 +165,7 @@ hooks = [
    'pattern': 'src/electron',
    'condition': 'checkout_requests and process_deps',
    'action': [
-      'python',
+      'python3',
      '-c',
      'import os, subprocess; os.chdir(os.path.join("src", "electron", "vendor", "requests")); subprocess.check_call(["python", "setup.py", "build"]);',
    ],
@@ -154,4 +174,5 @@ hooks = [

 recursedeps = [
  'src',
+  'src/third_party/squirrel.mac',
 ]
--- a/2
+++ b/2
@@ -1 +1 @@
-10.0.0-nightly.20200521
+11.0.4
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -6,7 +6,11 @@ To report a security issue, email [security@electronjs.org](mailto:security@elec

 The Electron team will send a response indicating the next steps in handling your report. After the initial reply to your report, the security team will keep you informed of the progress towards a fix and full announcement, and may ask for additional information or guidance.

-Report security bugs in third-party modules to the person or team maintaining the module. You can also report a vulnerability through the [Node Security Project](https://nodesecurity.io/report).
+Report security bugs in third-party modules to the person or team maintaining the module. You can also report a vulnerability through the [npm contact form](https://www.npmjs.com/support) by selecting "I'm reporting a security vulnerability".
+
+## The Electron Security Notification Process
+
+For context on Electron's security notification process, please see the [Notifications](https://github.com/electron/governance/blob/master/wg-security/membership-and-notifications.md#notifications) section of the Security WG's [Membership and Notifications](https://github.com/electron/governance/blob/master/wg-security/membership-and-notifications.md) Governance document.

 ## Learning More About Security
 To learn more about securing an Electron application, please see the [security tutorial](docs/tutorial/security.md).
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,7 +29,7 @@

 version: 1.0.{build}
 build_cloud: electron-16-core
-image: vs2019bt-16.4.0
+image: vs2019bt-16.6.2
 environment:
  GIT_CACHE_PATH: C:\Users\electron\libcc_cache
  ELECTRON_OUT_DIR: Default
@@ -53,7 +53,9 @@ build_script:
      } else {
        node script/yarn.js install --frozen-lockfile

-        if ($(node script/doc-only-change.js --prNumber=$env:APPVEYOR_PULL_REQUEST_NUMBER --prBranch=$env:APPVEYOR_REPO_BRANCH;$LASTEXITCODE -eq 0)) {
+        $result = node script/doc-only-change.js --prNumber=$env:APPVEYOR_PULL_REQUEST_NUMBER --prBranch=$env:APPVEYOR_REPO_BRANCH
+        Write-Output $result
+        if ($result.ExitCode -eq 0) {
          Write-warning "Skipping build for doc only change"; Exit-AppveyorBuild
        }
      }
@@ -61,6 +63,7 @@ build_script:
  - git config --global core.longpaths true
  - cd ..
  - mkdir src
+  - 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"
@@ -98,6 +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
@@ -113,14 +121,16 @@ build_script:
      if ($env:SAVE_GCLIENT_SRC -eq 'true') {
        # archive current source for future use 
        # only run on x64/woa to avoid contention saving
-        if ($(7z a $zipfile src -xr!android_webview -xr!electron -xr'!*\.git' -xr!third_party\WebKit\LayoutTests! -xr!third_party\blink\web_tests -xr!third_party\blink\perf_tests -slp -t7z -mmt=30;$LASTEXITCODE -ne 0)) {
+        $(7z a $zipfile src -xr!android_webview -xr!electron -xr'!*\.git' -xr!third_party\WebKit\LayoutTests! -xr!third_party\blink\web_tests -xr!third_party\blink\perf_tests -slp -t7z -mmt=30)
+        if ($LASTEXITCODE -ne 0) {
          Write-warning "Could not save source to shared drive; continuing anyway"
        }
-        # build time generation of file gen/angle/commit.h depends on
-        # third_party/angle/.git/HEAD.
+        # build time generation of file gen/angle/angle_commit.h depends on
+        # third_party/angle/.git
        # https://chromium-review.googlesource.com/c/angle/angle/+/2074924
-        if ($(7z a $zipfile src\third_party\angle\.git\HEAD;$LASTEXITCODE -ne 0)) {
-          Write-warning "Failed to add third_party\angle\.git\HEAD; continuing anyway"
+        $(7z a $zipfile src\third_party\angle\.git)
+        if ($LASTEXITCODE -ne 0) {
+          Write-warning "Failed to add third_party\angle\.git; continuing anyway"
        }
      }
  - ps: >-
@@ -133,7 +143,7 @@ build_script:
        cd build-tools
        npm install
        mkdir third_party
-        node -e "require('./src/utils/goma.js').downloadAndPrepare()"
+        node -e "require('./src/utils/goma.js').downloadAndPrepare({ gomaOneForAll: true })"
        $env:GN_GOMA_FILE = node -e "console.log(require('./src/utils/goma.js').gnFilePath)"
        $env:LOCAL_GOMA_DIR = node -e "console.log(require('./src/utils/goma.js').dir)"
        cd ..
@@ -204,7 +214,8 @@ test_script:
        echo "Skipping tests for $env:GN_CONFIG build"
      }
  - cd electron
-  - if "%RUN_TESTS%"=="true" ( echo Running test suite & node script/yarn test -- --trace-uncaught --enable-logging)
+  # CalculateNativeWinOcclusion is disabled due to https://bugs.chromium.org/p/chromium/issues/detail?id=1139022
+  - if "%RUN_TESTS%"=="true" ( echo Running test suite & node script/yarn test -- --trace-uncaught --enable-logging --disable-features=CalculateNativeWinOcclusion )
  - cd ..
  - if "%RUN_TESTS%"=="true" ( echo Verifying non proprietary ffmpeg & python electron\script\verify-ffmpeg.py --build-dir out\Default --source-root %cd% --ffmpeg-path out\ffmpeg )
  - echo "About to verify mksnapshot"
@@ -218,10 +229,10 @@ deploy_script:
      if (Test-Path Env:\ELECTRON_RELEASE) {
        if (Test-Path Env:\UPLOAD_TO_S3) {
          Write-Output "Uploading Electron release distribution to s3"
-          & python script\release\uploaders\upload.py --upload_to_s3
+          & python script\release\uploaders\upload.py --verbose --upload_to_s3
        } else {
          Write-Output "Uploading Electron release distribution to github releases"
-          & python script\release\uploaders\upload.py
+          & python script\release\uploaders\upload.py --verbose
        }
      } elseif (Test-Path Env:\TEST_WOA) {
        node script/release/ci-release-build.js --job=electron-woa-testing --ci=VSTS --armTest --appveyorJobId=$env:APPVEYOR_JOB_ID $env:APPVEYOR_REPO_BRANCH
--- a/azure-pipelines-arm.yml
+++ b/azure-pipelines-arm.yml
@@ -0,0 +1,104 @@
+steps:
+- task: CopyFiles@2
+  displayName: 'Copy Files to: src/electron'
+  inputs:
+    TargetFolder: src/electron
+
+- bash: |
+    cd src/electron
+    node script/yarn.js install --frozen-lockfile
+  displayName: 'Yarn install'
+
+- bash: |
+    export ZIP_DEST=$PWD/src/out/Default
+    echo "##vso[task.setvariable variable=ZIP_DEST]$ZIP_DEST"
+    mkdir -p $ZIP_DEST
+    cd src/electron
+    node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=dist.zip --dest=$ZIP_DEST
+    cd $ZIP_DEST
+    unzip -o dist.zip
+  displayName: 'Download and unzip dist files for test'
+  env:
+    CIRCLE_TOKEN: $(CIRCLECI_TOKEN)
+
+- bash: |
+    export FFMPEG_ZIP_DEST=$PWD/src/out/ffmpeg
+    mkdir -p $FFMPEG_ZIP_DEST
+    cd src/electron
+    node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=ffmpeg.zip --dest=$FFMPEG_ZIP_DEST
+    cd $FFMPEG_ZIP_DEST
+    unzip -o ffmpeg.zip
+  displayName: 'Download and unzip ffmpeg for test'
+  env:
+    CIRCLE_TOKEN: $(CIRCLECI_TOKEN)
+
+- bash: |
+   export NODE_HEADERS_DEST=$PWD/src/out/Default/gen
+   mkdir -p $NODE_HEADERS_DEST
+   cd src/electron
+   node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=node_headers.tar.gz --dest=$NODE_HEADERS_DEST
+   cd $NODE_HEADERS_DEST
+   tar xzf node_headers.tar.gz
+  displayName: 'Download and untar node header files for test'
+  env:
+    CIRCLE_TOKEN: $(CIRCLECI_TOKEN)
+
+- bash: |
+   export CROSS_ARCH_SNAPSHOTS=$PWD/src/out/Default/cross-arch-snapshots
+   mkdir -p $CROSS_ARCH_SNAPSHOTS
+   cd src/electron
+   node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=cross-arch-snapshots/snapshot_blob.bin --dest=$CROSS_ARCH_SNAPSHOTS
+   node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=cross-arch-snapshots/v8_context_snapshot.bin --dest=$CROSS_ARCH_SNAPSHOTS
+  displayName: 'Download cross arch snapshot files'
+  env:
+    CIRCLE_TOKEN: $(CIRCLECI_TOKEN)
+
+- bash: |
+   export NATIVE_UNITTESTS_DEST=$PWD/src/out/Default
+   cd src/electron
+   node script/download-circleci-artifacts.js --buildNum=$CIRCLE_BUILD_NUM --name=shell_browser_ui_unittests --dest=$NATIVE_UNITTESTS_DEST
+   chmod +x $NATIVE_UNITTESTS_DEST/shell_browser_ui_unittests
+  displayName: 'Download native unittest executables'
+  env:
+    CIRCLE_TOKEN: $(CIRCLECI_TOKEN)
+
+- bash: |
+    cd src
+    export ELECTRON_OUT_DIR=Default
+    set npm_config_arch=arm64
+    (cd electron && node script/yarn test -- --enable-logging)
+  displayName: 'Run Electron tests'
+  timeoutInMinutes: 20
+  env:
+    ELECTRON_DISABLE_SECURITY_WARNINGS: 1
+    IGNORE_YARN_INSTALL_ERROR: 1
+    ELECTRON_TEST_RESULTS_DIR: junit
+
+- bash: |
+    cd src
+    python electron/script/verify-ffmpeg.py --source-root "$PWD" --build-dir out/Default --ffmpeg-path out/ffmpeg
+  displayName: Verify non proprietary ffmpeg
+  timeoutInMinutes: 5
+  condition: succeededOrFailed()
+
+- bash: |
+    cd src
+    echo Verify cross arch snapshot
+    python electron/script/verify-mksnapshot.py --source-root "$PWD" --build-dir out/Default --snapshot-files-dir $PWD/out/Default/cross-arch-snapshots
+  displayName: Verify cross arch snapshot
+  timeoutInMinutes: 5
+  condition: succeededOrFailed()
+
+- task: PublishTestResults@2
+  displayName: 'Publish Test Results'
+  inputs:
+    testResultsFiles: '*.xml'
+
+    searchFolder: '$(System.DefaultWorkingDirectory)/src/junit/'
+
+  condition: succeededOrFailed()
+
+- task: mspremier.PostBuildCleanup.PostBuildCleanup-task.PostBuildCleanup@3
+  displayName: 'Clean Agent Directories'
+
+  condition: always()
--- 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
@@ -71,7 +72,6 @@ steps:
    ELECTRON_TEST_RESULTS_DIR: junit
    MOCHA_MULTI_REPORTERS: 'mocha-junit-reporter, tap'
    MOCHA_REPORTER: mocha-multi-reporters
-    MOCHA_TIMEOUT: 120000

 - task: PublishTestResults@2
  displayName: 'Publish Test Results'
@@ -88,7 +88,11 @@ steps:

 - powershell: |
    Get-Process | Where Name –Like "electron*" | Stop-Process
-    Get-Process | Where Name –Like "MicrosoftEdge*" | Stop-Process
    Get-Process | Where Name –Like "msedge*" | Stop-Process
  displayName: 'Kill processes left running from last test run'
  condition: always()
+
+- powershell: |
+    Remove-Item -path $env:APPDATA/Electron* -Recurse
+  displayName: 'Delete user app data directories'
+  condition: always()
--- a/build/args/all.gn
+++ b/build/args/all.gn
@@ -2,7 +2,7 @@ is_electron_build = true
 root_extra_deps = [ "//electron" ]

 # Registry of NMVs --> https://github.com/nodejs/node/blob/master/doc/abi_version_registry.json
-node_module_version = 82
+node_module_version = 85

 v8_promise_internal_field_count = 1
 v8_typed_array_max_size_in_heap = 0
--- a/build/fake_v8_context_snapshot_generator.py
+++ b/build/fake_v8_context_snapshot_generator.py
@@ -0,0 +1,8 @@
+import os
+import shutil
+import sys
+
+if os.path.exists(sys.argv[2]):
+  os.remove(sys.argv[2])
+
+shutil.copy(sys.argv[1], sys.argv[2])
--- a/build/js2c.py
+++ b/build/js2c.py
--- a/build/strip_framework.py
+++ b/build/strip_framework.py
@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+import os
+import subprocess
+import sys
+
+source = sys.argv[1]
+dest = sys.argv[2]
+
+# Ensure any existing framework is removed
+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')])
--- a/build/webpack/get-outputs.js
+++ b/build/webpack/get-outputs.js
@@ -1,2 +1,2 @@
-process.env.PRINT_WEBPACK_GRAPH = true
-require('./run-compiler')
+process.env.PRINT_WEBPACK_GRAPH = true;
+require('./run-compiler');
--- a/build/webpack/run-compiler.js
+++ b/build/webpack/run-compiler.js
@@ -1,22 +1,45 @@
-const path = require('path')
-const webpack = require('webpack')
+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)
+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)
-}
+};

-webpack(config, (err, stats) => {
+const { wrapInitWithProfilingTimeout, wrapInitWithTryCatch, ...webpackConfig } = config;
+
+webpack(webpackConfig, (err, stats) => {
  if (err) {
-    console.error(err)
-    process.exit(1)
+    console.error(err);
+    process.exit(1);
  } else if (stats.hasErrors()) {
-    console.error(stats.toString('normal'))
-    process.exit(1)
+    console.error(stats.toString('normal'));
+    process.exit(1);
  } else {
-    process.exit(0)
+    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.asar.js
+++ b/build/webpack/webpack.config.asar.js
@@ -0,0 +1,5 @@
+module.exports = require('./webpack.config.base')({
+  target: 'asar',
+  alwaysHasNode: true,
+  targetDeletesNodeGlobals: true
+});
--- a/build/webpack/webpack.config.base.js
+++ b/build/webpack/webpack.config.base.js
@@ -1,111 +1,120 @@
-const fs = require('fs')
-const path = require('path')
-const webpack = require('webpack')
+const fs = require('fs');
+const path = require('path');
+const webpack = require('webpack');
+const TerserPlugin = require('terser-webpack-plugin');

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

-const onlyPrintingGraph = !!process.env.PRINT_WEBPACK_GRAPH
+const onlyPrintingGraph = !!process.env.PRINT_WEBPACK_GRAPH;

 class AccessDependenciesPlugin {
-  apply(compiler) {
+  apply (compiler) {
    // Only hook into webpack when we are printing the dependency graph
-    if (!onlyPrintingGraph) return
+    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))
-        console.info(JSON.stringify(filePaths))
-      })
-    })
+        const filePaths = modules.map(m => m.resource).filter(p => p).map(p => path.relative(electronRoot, p));
+        console.info(JSON.stringify(filePaths));
+      });
+    });
  }
 }

 const defines = {
-  BUILDFLAG: ''
-}
+  BUILDFLAG: onlyPrintingGraph ? '(a => a)' : ''
+};

-const buildFlagsPrefix = '--buildflags='
+const buildFlagsPrefix = '--buildflags=';
 const buildFlagArg = process.argv.find(arg => arg.startsWith(buildFlagsPrefix));

 if (buildFlagArg) {
-  const buildFlagPath = buildFlagArg.substr(buildFlagsPrefix.length)
+  const buildFlagPath = buildFlagArg.substr(buildFlagsPrefix.length);

-  const flagFile = fs.readFileSync(buildFlagPath, 'utf8')
+  const flagFile = fs.readFileSync(buildFlagPath, 'utf8');
  for (const line of flagFile.split(/(\r\n|\r|\n)/g)) {
-    const flagMatch = line.match(/#define BUILDFLAG_INTERNAL_(.+?)\(\) \(([01])\)/)
+    const flagMatch = line.match(/#define BUILDFLAG_INTERNAL_(.+?)\(\) \(([01])\)/);
    if (flagMatch) {
-      const flagName = flagMatch[1];
-      const flagValue = flagMatch[2];
+      const [, flagName, flagValue] = flagMatch;
      defines[flagName] = JSON.stringify(Boolean(parseInt(flagValue, 10)));
    }
  }
 }

-const ignoredModules = []
+const ignoredModules = [];

-if (defines['ENABLE_DESKTOP_CAPTURER'] === 'false') {
+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') {
+if (defines.ENABLE_REMOTE_MODULE === 'false') {
  ignoredModules.push(
    '@electron/internal/browser/remote/server',
    '@electron/internal/renderer/api/remote'
-  )
+  );
 }

-if (defines['ENABLE_VIEWS_API'] === 'false') {
+if (defines.ENABLE_VIEWS_API === 'false') {
  ignoredModules.push(
    '@electron/internal/browser/api/views/image-view.js'
-  )
-}
-
-const alias = {}
-for (const ignoredModule of ignoredModules) {
-  alias[ignoredModule] = path.resolve(electronRoot, 'lib/common/dummy.js')
+  );
 }

 module.exports = ({
  alwaysHasNode,
  loadElectronFromAlternateTarget,
  targetDeletesNodeGlobals,
-  target
+  target,
+  wrapInitWithProfilingTimeout,
+  wrapInitWithTryCatch
 }) => {
-  let entry = path.resolve(electronRoot, 'lib', target, 'init.ts')
+  let entry = path.resolve(electronRoot, 'lib', target, 'init.ts');
  if (!fs.existsSync(entry)) {
-    entry = path.resolve(electronRoot, 'lib', target, 'init.js')
+    entry = path.resolve(electronRoot, 'lib', target, 'init.js');
  }

+  const electronAPIFile = path.resolve(electronRoot, 'lib', loadElectronFromAlternateTarget || target, 'api', 'exports', 'electron.ts');
+
  return ({
    mode: 'development',
-    devtool: 'inline-source-map',
+    devtool: false,
    entry,
    target: alwaysHasNode ? 'node' : 'web',
    output: {
      filename: `${target}.bundle.js`
    },
+    wrapInitWithProfilingTimeout,
+    wrapInitWithTryCatch,
    resolve: {
      alias: {
-        ...alias,
        '@electron/internal': path.resolve(electronRoot, 'lib'),
-        'electron': path.resolve(electronRoot, 'lib', loadElectronFromAlternateTarget || target, 'api', 'exports', 'electron.ts'),
-        // Force timers to resolve to our dependency that doens't use window.postMessage
-        'timers': path.resolve(electronRoot, 'node_modules', 'timers-browserify', 'main.js')
+        electron$: 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: [6059]
+          ignoreDiagnostics: [
+            // File '{0}' is not under 'rootDir' '{1}'.
+            6059
+          ]
        }
      }]
    },
@@ -114,21 +123,32 @@ module.exports = ({
      __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,
+      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/renderer/webpack-provider', 'process'],
-          global: ['@electron/internal/renderer/webpack-provider', '_global'],
-          Buffer: ['@electron/internal/renderer/webpack-provider', 'Buffer'],
+          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'],
+        Promise: ['@electron/internal/common/webpack-globals-provider', 'Promise']
      }),
-      new webpack.DefinePlugin(defines),
+      new webpack.DefinePlugin(defines)
    ]
-  })
-}
+  });
+};
--- a/build/webpack/webpack.config.browser.js
+++ b/build/webpack/webpack.config.browser.js
@@ -1,4 +1,4 @@
 module.exports = require('./webpack.config.base')({
  target: 'browser',
  alwaysHasNode: true
-})
+});
--- a/build/webpack/webpack.config.isolated_renderer.js
+++ b/build/webpack/webpack.config.isolated_renderer.js
@@ -1,4 +1,5 @@
 module.exports = require('./webpack.config.base')({
  target: 'isolated_renderer',
-  alwaysHasNode: false
-})
+  alwaysHasNode: false,
+  wrapInitWithTryCatch: true
+});
--- a/build/webpack/webpack.config.renderer.js
+++ b/build/webpack/webpack.config.renderer.js
@@ -1,5 +1,7 @@
 module.exports = require('./webpack.config.base')({
  target: 'renderer',
  alwaysHasNode: true,
-  targetDeletesNodeGlobals: true
-})
+  targetDeletesNodeGlobals: true,
+  wrapInitWithProfilingTimeout: true,
+  wrapInitWithTryCatch: true
+});
--- a/build/webpack/webpack.config.sandboxed_renderer.js
+++ b/build/webpack/webpack.config.sandboxed_renderer.js
@@ -1,4 +1,6 @@
 module.exports = require('./webpack.config.base')({
  target: 'sandboxed_renderer',
-  alwaysHasNode: false
-})
+  alwaysHasNode: false,
+  wrapInitWithProfilingTimeout: true,
+  wrapInitWithTryCatch: true
+});
--- a/build/webpack/webpack.config.worker.js
+++ b/build/webpack/webpack.config.worker.js
@@ -2,5 +2,6 @@ module.exports = require('./webpack.config.base')({
  target: 'worker',
  loadElectronFromAlternateTarget: 'renderer',
  alwaysHasNode: true,
-  targetDeletesNodeGlobals: true
-})
+  targetDeletesNodeGlobals: true,
+  wrapInitWithTryCatch: true
+});
--- a/build/webpack/webpack.gni
+++ b/build/webpack/webpack.gni
@@ -16,6 +16,7 @@ template("webpack_build") {
    inputs = [
               invoker.config_file,
               "//electron/build/webpack/webpack.config.base.js",
+               "//electron/build/webpack/run-compiler.js",
               "//electron/tsconfig.json",
               "//electron/yarn.lock",
               "//electron/typings/internal-ambient.d.ts",
--- a/build/zip.py
+++ b/build/zip.py
@@ -13,25 +13,30 @@ EXTENSIONS_TO_SKIP = [
 ]

 PATHS_TO_SKIP = [
-  'angledata', #Skipping because it is an output of //ui/gl that we don't need
-  './libVkICD_mock_', #Skipping because these are outputs that we don't need
-  './VkICD_mock_', #Skipping because these are outputs that we don't need
-
-  # Skipping because its an output of create_bundle from //build/config/mac/rules.gni
+  # Skip because it is an output of //ui/gl that we don't need.
+  'angledata',
+  # Skip because these are outputs that we don't need.
+  './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
  '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
+  '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
  # ship it.
  'pyproto',
-
  # On Windows, this binary doesn't exist (the crashpad handler is built-in).
  # On MacOS, the binary is called 'chrome_crashpad_handler' and is inside the
  # app bundle.
  # On Linux, we don't use crashpad, but this binary is still built for some
  # reason. Exclude it from the zip.
  './crashpad_handler',
+  # Skip because these are outputs that we don't need.
+  'resources/inspector',
 ]

 def skip_path(dep, dist_zip, target_cpu):
--- a/buildflags/BUILD.gn
+++ b/buildflags/BUILD.gn
@@ -21,6 +21,7 @@ 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
@@ -36,4 +36,7 @@ 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
@@ -12,6 +12,8 @@ import("//third_party/widevine/cdm/widevine.gni")
 static_library("chrome") {
  visibility = [ "//electron:electron_lib" ]
  sources = [
+    "//chrome/browser/accessibility/accessibility_ui.cc",
+    "//chrome/browser/accessibility/accessibility_ui.h",
    "//chrome/browser/browser_process.cc",
    "//chrome/browser/browser_process.h",
    "//chrome/browser/crash_upload_list/crash_upload_list_crashpad.cc",
@@ -24,18 +26,10 @@ static_library("chrome") {
    "//chrome/browser/devtools/devtools_file_system_indexer.h",
    "//chrome/browser/extensions/global_shortcut_listener.cc",
    "//chrome/browser/extensions/global_shortcut_listener.h",
-    "//chrome/browser/extensions/global_shortcut_listener_mac.h",
-    "//chrome/browser/extensions/global_shortcut_listener_mac.mm",
-    "//chrome/browser/extensions/global_shortcut_listener_win.cc",
-    "//chrome/browser/extensions/global_shortcut_listener_win.h",
    "//chrome/browser/icon_loader.cc",
    "//chrome/browser/icon_loader.h",
-    "//chrome/browser/icon_loader_mac.mm",
-    "//chrome/browser/icon_loader_win.cc",
    "//chrome/browser/icon_manager.cc",
    "//chrome/browser/icon_manager.h",
-    "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.h",
-    "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.mm",
    "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.cc",
    "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.h",
    "//chrome/browser/net/proxy_config_monitor.cc",
@@ -55,24 +49,45 @@ static_library("chrome") {
    "//chrome/browser/ssl/tls_deprecation_config.cc",
    "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.cc",
    "//chrome/browser/ui/views/autofill/autofill_popup_view_utils.h",
-    "//chrome/browser/win/chrome_process_finder.cc",
-    "//chrome/browser/win/chrome_process_finder.h",
-    "//chrome/child/v8_crashpad_support_win.cc",
-    "//chrome/child/v8_crashpad_support_win.h",
    "//extensions/browser/app_window/size_constraints.cc",
    "//extensions/browser/app_window/size_constraints.h",
  ]
+
+  if (is_mac) {
+    sources += [
+      "//chrome/browser/extensions/global_shortcut_listener_mac.h",
+      "//chrome/browser/extensions/global_shortcut_listener_mac.mm",
+      "//chrome/browser/icon_loader_mac.mm",
+      "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.h",
+      "//chrome/browser/media/webrtc/system_media_capture_permissions_mac.mm",
+    ]
+  }
+
+  if (is_win) {
+    sources += [
+      "//chrome/browser/extensions/global_shortcut_listener_win.cc",
+      "//chrome/browser/extensions/global_shortcut_listener_win.h",
+      "//chrome/browser/icon_loader_win.cc",
+      "//chrome/browser/win/chrome_process_finder.cc",
+      "//chrome/browser/win/chrome_process_finder.h",
+      "//chrome/child/v8_crashpad_support_win.cc",
+      "//chrome/child/v8_crashpad_support_win.h",
+    ]
+  }
+
  public_deps = [
    "//chrome/common",
    "//chrome/common:version_header",
    "//components/keyed_service/content",
+    "//components/paint_preview/buildflags",
    "//components/proxy_config",
    "//components/security_state/content",
    "//content/public/browser",
  ]
+
  deps = [
    "//chrome/browser:resource_prefetch_predictor_proto",
-    "//components/feature_engagement:buildflags",
+    "//chrome/services/speech:buildflags",
    "//components/optimization_guide/proto:optimization_guide_proto",
  ]

@@ -92,6 +107,14 @@ static_library("chrome") {
    ]
  }

+  if (is_win) {
+    sources += [
+      "//chrome/browser/win/icon_reader_service.cc",
+      "//chrome/browser/win/icon_reader_service.h",
+    ]
+    public_deps += [ "//chrome/services/util_win:lib" ]
+  }
+
  if (enable_desktop_capturer) {
    sources += [
      "//chrome/browser/media/webrtc/desktop_media_list.h",
@@ -152,13 +175,6 @@ static_library("chrome") {
    }
  }

-  if (enable_tts) {
-    sources += [
-      "//chrome/browser/speech/tts_controller_delegate_impl.cc",
-      "//chrome/browser/speech/tts_controller_delegate_impl.h",
-    ]
-  }
-
  if (enable_widevine) {
    sources += [
      "//chrome/renderer/media/chrome_key_systems.cc",
@@ -260,12 +276,23 @@ static_library("chrome") {
      ]
    }
  }
+
+  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" ]
+    }
+  }
 }

 source_set("plugins") {
  sources = []
  deps = []
-  libs = []
+  frameworks = []

  # browser side
  sources += [
@@ -299,7 +326,7 @@ source_set("plugins") {
        "//chrome/browser/renderer_host/pepper/monitor_finder_mac.h",
        "//chrome/browser/renderer_host/pepper/monitor_finder_mac.mm",
      ]
-      libs += [ "CoreGraphics.framework" ]
+      frameworks += [ "CoreGraphics.framework" ]
    }
    if (is_linux) {
      deps += [ "//components/services/font/public/cpp" ]
@@ -363,8 +390,8 @@ source_set("chrome_spellchecker") {
      "//chrome/browser/spellchecker/spellcheck_factory.h",
      "//chrome/browser/spellchecker/spellcheck_hunspell_dictionary.cc",
      "//chrome/browser/spellchecker/spellcheck_hunspell_dictionary.h",
-      "//chrome/browser/spellchecker/spellcheck_language_blacklist_policy_handler.cc",
-      "//chrome/browser/spellchecker/spellcheck_language_blacklist_policy_handler.h",
+      "//chrome/browser/spellchecker/spellcheck_language_blocklist_policy_handler.cc",
+      "//chrome/browser/spellchecker/spellcheck_language_blocklist_policy_handler.h",
      "//chrome/browser/spellchecker/spellcheck_language_policy_handler.cc",
      "//chrome/browser/spellchecker/spellcheck_language_policy_handler.h",
      "//chrome/browser/spellchecker/spellcheck_service.cc",
--- a/chromium_src/chrome/browser/certificate_manager_model.cc
+++ b/chromium_src/chrome/browser/certificate_manager_model.cc
@@ -36,6 +36,7 @@ net::NSSCertDatabase* GetNSSCertDatabaseForResourceContext(
    // Linux has only a single persistent slot compared to ChromeOS's separate
    // public and private slot.
    // Redirect any slot usage to this persistent slot on Linux.
+    crypto::EnsureNSSInit();
    g_nss_cert_database = new net::NSSCertDatabase(
        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* public slot */,
        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* private slot */);
--- a/chromium_src/chrome/browser/process_singleton_posix.cc
+++ b/chromium_src/chrome/browser/process_singleton_posix.cc
@@ -68,7 +68,6 @@
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
@@ -361,7 +360,7 @@ bool CheckCookie(const base::FilePath& path, const base::FilePath& cookie) {
 }

 bool IsAppSandboxed() {
-#if defined(OS_MACOSX)
+#if defined(OS_MAC)
  // NB: There is no sane API for this, we have to just guess by
  // reading tea leaves
  base::FilePath home_dir;
@@ -372,7 +371,7 @@ bool IsAppSandboxed() {
  return home_dir.value().find("Library/Containers") != std::string::npos;
 #else
  return false;
-#endif  // defined(OS_MACOSX)
+#endif  // defined(OS_MAC)
 }

 bool ConnectSocket(ScopedSocket* socket,
@@ -422,7 +421,7 @@ bool ConnectSocket(ScopedSocket* socket,
  }
 }

-#if defined(OS_MACOSX)
+#if defined(OS_MAC)
 bool ReplaceOldSingletonLock(const base::FilePath& symlink_content,
                             const base::FilePath& lock_path) {
  // Try taking an flock(2) on the file. Failure means the lock is taken so we
@@ -448,14 +447,14 @@ bool ReplaceOldSingletonLock(const base::FilePath& symlink_content,
  // lock. We never flock() the lock file from now on. I.e. we assume that an
  // old version of Chrome will not run with the same user data dir after this
  // version has run.
-  if (!base::DeleteFile(lock_path, false)) {
+  if (!base::DeleteFile(lock_path)) {
    PLOG(ERROR) << "Could not delete old singleton lock.";
    return false;
  }

  return SymlinkPath(symlink_content, lock_path);
 }
-#endif  // defined(OS_MACOSX)
+#endif  // defined(OS_MAC)

 }  // namespace

@@ -827,10 +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
@@ -971,7 +969,7 @@ bool ProcessSingleton::Create() {
  if (!SymlinkPath(symlink_content, lock_path_)) {
    // TODO(jackhou): Remove this case once this code is stable on Mac.
    // http://crbug.com/367612
-#if defined(OS_MACOSX)
+#if defined(OS_MAC)
    // On Mac, an existing non-symlink lock file means the lock could be held by
    // the old process singleton code. If we can successfully replace the lock,
    // continue as normal.
--- a/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc
+++ b/chromium_src/chrome/browser/ui/views/frame/global_menu_bar_registrar_x11.cc
@@ -24,18 +24,18 @@ GlobalMenuBarRegistrarX11* GlobalMenuBarRegistrarX11::GetInstance() {
  return base::Singleton<GlobalMenuBarRegistrarX11>::get();
 }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  GDBusProxy* registrar_proxy_;

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

  DISALLOW_COPY_AND_ASSIGN(GlobalMenuBarRegistrarX11);
 };
--- a/default_app/default_app.ts
+++ b/default_app/default_app.ts
@@ -1,5 +1,6 @@
 import { app, dialog, BrowserWindow, shell, ipcMain } from 'electron';
 import * as path from 'path';
+import * as url from 'url';

 let mainWindow: BrowserWindow | null = null;

@@ -29,12 +30,11 @@ function isTrustedSender (webContents: Electron.WebContents) {
    return false;
  }

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

 ipcMain.handle('bootstrap', (event) => {
--- a/default_app/index.html
+++ b/default_app/index.html
@@ -53,31 +53,31 @@
    <nav>
      <div class="linkcol">
        <a class="hero-link" target="_blank" href="https://electronjs.org/blog">
-          <span class="octicon hero-octicon octicon-gist" aria-hidden="true"></span>
+          <span class="octicon hero-octicon octicon-code-square-24" aria-hidden="true"></span>
          <h4>Blog</h4>
        </a>
      </div>
      <div class="linkcol">
        <a class="hero-link" target="_blank" href="https://github.com/electron/electron">
-          <span class="octicon hero-octicon octicon-mark-github" aria-hidden="true"></span>
+          <span class="octicon hero-octicon octicon-mark-github-16" aria-hidden="true"></span>
          <h4>Repository</h4>
        </a>
      </div>
      <div class="linkcol">
        <a class="hero-link" target="_blank" href="https://electronjs.org/docs">
-          <span class="octicon hero-octicon octicon-gear" aria-hidden="true"></span>
+          <span class="octicon hero-octicon octicon-book-24" aria-hidden="true"></span>
          <h4>Docs</h4>
        </a>
      </div>
      <div class="linkcol">
        <a class="hero-link" target="_blank" href="https://github.com/electron/electron-api-demos">
-          <span class="octicon hero-octicon octicon-star" aria-hidden="true"></span>
+          <span class="octicon hero-octicon octicon-star-fill-24" aria-hidden="true"></span>
          <h4>API Demos</h4>
        </a>
      </div>
      <div class="linkcol">
        <a class="hero-link" target="_blank" href="https://electronforge.io">
-          <span class="octicon hero-octicon octicon-gift" aria-hidden="true"></span>
+          <span class="octicon hero-octicon octicon-gift-24" aria-hidden="true"></span>
          <h4>Forge</h4>
        </a>
      </div>
--- a/default_app/main.ts
+++ b/default_app/main.ts
@@ -1,8 +1,9 @@
-import { app, dialog } from 'electron';
+import * as electron from 'electron';

 import * as fs from 'fs';
 import * as path from 'path';
 import * as url from 'url';
+const { app, dialog } = electron;

 type DefaultAppOptions = {
  file: null | string;
@@ -145,13 +146,90 @@ function startRepl () {
    process.exit(1);
  }

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

-  const repl = require('repl');
-  repl.start('> ').on('exit', () => {
+  const GREEN = '32';
+  const colorize = (color: string, s: string) => `\x1b[${color}m${s}\x1b[0m`;
+  const electronVersion = colorize(GREEN, `v${process.versions.electron}`);
+  const nodeVersion = colorize(GREEN, `v${process.versions.node}`);
+
+  console.info(`
+    Welcome to the Electron.js REPL \\[._.]/
+
+    You can access all Electron.js modules here as well as Node.js modules.
+    Using: Node.js ${nodeVersion} and Electron.js ${electronVersion}
+  `);
+
+  const { REPLServer } = require('repl');
+  const repl = new REPLServer({
+    prompt: '> '
+  }).on('exit', () => {
    process.exit(0);
  });
+
+  function defineBuiltin (context: any, name: string, getter: Function) {
+    const setReal = (val: any) => {
+      // Deleting the property before re-assigning it disables the
+      // getter/setter mechanism.
+      delete context[name];
+      context[name] = val;
+    };
+
+    Object.defineProperty(context, name, {
+      get: () => {
+        const lib = getter();
+
+        delete context[name];
+        Object.defineProperty(context, name, {
+          get: () => lib,
+          set: setReal,
+          configurable: true,
+          enumerable: false
+        });
+
+        return lib;
+      },
+      set: setReal,
+      configurable: true,
+      enumerable: false
+    });
+  }
+
+  defineBuiltin(repl.context, 'electron', () => electron);
+  for (const api of Object.keys(electron) as (keyof typeof electron)[]) {
+    defineBuiltin(repl.context, api, () => electron[api]);
+  }
+
+  // Copied from node/lib/repl.js. For better DX, we don't want to
+  // show e.g 'contentTracing' at a higher priority than 'const', so
+  // we only trigger custom tab-completion when no common words are
+  // potentially matches.
+  const commonWords = [
+    'async', 'await', 'break', 'case', 'catch', 'const', 'continue',
+    'debugger', 'default', 'delete', 'do', 'else', 'export', 'false',
+    'finally', 'for', 'function', 'if', 'import', 'in', 'instanceof', 'let',
+    'new', 'null', 'return', 'switch', 'this', 'throw', 'true', 'try',
+    'typeof', 'var', 'void', 'while', 'with', 'yield'
+  ];
+
+  const electronBuiltins = [...Object.keys(electron), 'original-fs', 'electron'];
+
+  const defaultComplete = repl.completer;
+  repl.completer = (line: string, callback: Function) => {
+    const lastSpace = line.lastIndexOf(' ');
+    const currentSymbol = line.substring(lastSpace + 1, repl.cursor);
+
+    const filterFn = (c: string) => c.startsWith(currentSymbol);
+    const ignores = commonWords.filter(filterFn);
+    const hits = electronBuiltins.filter(filterFn);
+
+    if (!ignores.length && hits.length) {
+      callback(null, [hits, currentSymbol]);
+    } else {
+      defaultComplete.apply(repl, [line, callback]);
+    }
+  };
 }

 // Start the specified app if there is one specified in command line, otherwise
--- a/docs/README.md
+++ b/docs/README.md
@@ -92,7 +92,6 @@ 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)
-  * [App Feedback Program](tutorial/app-feedback-program.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)
--- a/docs/api/app.md
+++ b/docs/api/app.md
@@ -32,7 +32,8 @@ In most cases, you should do everything in the `ready` event handler.

 Returns:

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

 Emitted once, when Electron has finished initializing. On macOS, `launchInfo`
 holds the `userInfo` of the `NSUserNotification` that was used to open the
@@ -140,6 +141,16 @@ this event, such as launching the application for the first time, attempting
 to re-launch the application when it's already running, or clicking on the
 application's dock or taskbar icon.

+### Event: 'did-become-active' _macOS_
+
+Returns:
+
+* `event` Event
+
+Emitted when mac application become active. Difference from `activate` event is
+that `did-become-active` is emitted every time the app becomes active, not only
+when Dock icon is clicked or application is re-launched.
+
 ### Event: 'continue-activity' _macOS_

 Returns:
@@ -350,7 +361,7 @@ page.

 Emitted whenever there is a GPU info update.

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

 Returns:

@@ -359,7 +370,12 @@ Returns:

 Emitted when the GPU process crashes or is killed.

-### Event: 'renderer-process-crashed'
+**Deprecated:** This event is superceded by the `child-process-gone` event
+which contains more information about why the child 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: 'renderer-process-crashed' _Deprecated_

 Returns:

@@ -370,7 +386,7 @@ Returns:
 Emitted when the renderer process of `webContents` crashes or is killed.

 **Deprecated:** This event is superceded by the `render-process-gone` event
-which contains more information about why the render process dissapeared. It
+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.

@@ -387,12 +403,42 @@ Returns:
    * `killed` - Process was sent a SIGTERM or otherwise killed externally
    * `crashed` - Process crashed
    * `oom` - Process ran out of memory
-    * `launch-failure` - Process never successfully launched
+    * `launch-failed` - Process never successfully launched
    * `integrity-failure` - Windows code integrity checks failed

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

+#### Event: 'child-process-gone'
+
+Returns:
+
+* `event` Event
+* `details` Object
+  * `type` String - Process type. One of the following values:
+    * `Utility`
+    * `Zygote`
+    * `Sandbox helper`
+    * `GPU`
+    * `Pepper Plugin`
+    * `Pepper Plugin Broker`
+    * `Unknown`
+  * `reason` String - The reason the child process is gone. Possible values:
+    * `clean-exit` - Process exited with an exit code of zero
+    * `abnormal-exit` - Process exited with a non-zero exit code
+    * `killed` - Process was sent a SIGTERM or otherwise killed externally
+    * `crashed` - Process crashed
+    * `oom` - Process ran out of memory
+    * `launch-failed` - Process never successfully launched
+    * `integrity-failure` - Windows code integrity checks failed
+  * `exitCode` Number - The exit code for the process
+      (e.g. status from waitpid if on posix, from GetExitCodeProcess on Windows).
+  * `name` String (optional) - The name of the process. i.e. for plugins it might be Flash.
+    Examples for utility: `Audio Service`, `Content Decryption Module Service`, `Network Service`, `Video Capture`, etc.
+
+Emitted when the child process unexpectedly disappears. This is normally
+because it was crashed or killed. It does not include renderer processes.
+
 ### Event: 'accessibility-support-changed' _macOS_ _Windows_

 Returns:
@@ -805,6 +851,20 @@ Returns `String` - Name of the application handling the protocol, or an empty
 This method returns the application name of the default handler for the protocol
 (aka URI scheme) of a URL.

+### `app.getApplicationInfoForProtocol(url)` _macOS_ _Windows_
+
+* `url` String - a URL with the protocol name to check. Unlike the other
+  methods in this family, this accepts an entire URL, including `://` at a
+  minimum (e.g. `https://`).
+
+Returns `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.
+
+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.
+
 ### `app.setUserTasks(tasks)` _Windows_

 * `tasks` [Task[]](structures/task.md) - Array of `Task` objects
@@ -966,6 +1026,7 @@ if (!gotTheLock) {

  // Create myWindow, load the rest of the app, etc...
  app.whenReady().then(() => {
+    myWindow = createWindow()
  })
 }
 ```
@@ -1081,8 +1142,10 @@ 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:
-   { amdSwitchable: true,
+{
+  auxAttributes:
+   {
+     amdSwitchable: true,
     canSupportThreadedTextureMailbox: false,
     directComposition: false,
     directRendering: true,
@@ -1095,12 +1158,14 @@ For `infoType` equal to `basic`:
     sandboxed: false,
     softwareRendering: false,
     supportsOverlays: false,
-     videoDecodeAcceleratorFlags: 0 },
-gpuDevice:
-   [ { active: true, deviceId: 26657, vendorId: 4098 },
-     { active: false, deviceId: 3366, vendorId: 32902 } ],
-machineModelName: 'MacBookPro',
-machineModelVersion: '11.5' }
+     videoDecodeAcceleratorFlags: 0
+   },
+  gpuDevice:
+   [{ active: true, deviceId: 26657, vendorId: 4098 },
+     { active: false, deviceId: 3366, vendorId: 32902 }],
+  machineModelName: 'MacBookPro',
+  machineModelVersion: '11.5'
+}
 ```

 Using `basic` should be preferred if only basic information like `vendorId` or `driverId` is needed.
@@ -1152,6 +1217,13 @@ Returns `Object`:
  should restore the state from the previous session. This indicates that the
  app should restore the windows that were open the last time the app was
  closed. This setting is not available on [MAS builds][mas-builds].
+* `executableWillLaunchAtLogin` Boolean _Windows_ - `true` if app is set to open at login and its run key is not deactivated. This differs from `openAtLogin` as it ignores the `args` option, this property will be true if the given executable would be launched at login with **any** arguments.
+* `launchItems` Object[] _Windows_
+  * `name` String _Windows_ - name value of a registry entry.
+  * `path` String _Windows_ - The executable to an app that corresponds to a registry entry.
+  * `args` String[] _Windows_ - the command-line arguments to pass to the executable.
+  * `scope` String _Windows_ - one of `user` or `machine`. Indicates whether the registry entry is under `HKEY_CURRENT USER` or `HKEY_LOCAL_MACHINE`.
+  * `enabled` Boolean _Windows_ - `true` if the app registry key is startup approved and therefore shows as `enabled` in Task Manager and Windows settings.

 ### `app.setLoginItemSettings(settings)` _macOS_ _Windows_

@@ -1167,7 +1239,9 @@ Returns `Object`:
  * `args` String[] (optional) _Windows_ - The command-line arguments to pass to
    the executable. Defaults to an empty array. Take care to wrap paths in
    quotes.
-
+  * `enabled` Boolean (optional) _Windows_ - `true` will change the startup approved registry key and `enable / disable` the App in Task Manager and Windows Settings.
+    Defaults to `true`.
+  * `name` String (optional) _Windows_ - value name to write into registry. Defaults to the app's AppUserModelId().
 Set the app's login item settings.

 To work with Electron's `autoUpdater` on Windows, which uses [Squirrel][Squirrel-Windows],
@@ -1222,7 +1296,7 @@ Show the app's about panel options. These options can be overridden with `app.se
  * `credits` String (optional) _macOS_ _Windows_ - Credit information.
  * `authors` String[] (optional) _Linux_ - List of app authors.
  * `website` String (optional) _Linux_ - The app's website.
-  * `iconPath` String (optional) _Linux_ _Windows_ - Path to the app's icon. On Linux, will be shown as 64x64 pixels while retaining aspect ratio.
+  * `iconPath` String (optional) _Linux_ _Windows_ - Path to the app's icon in a JPEG or PNG file format. On Linux, will be shown as 64x64 pixels while retaining aspect ratio.

 Set the about panel options. This will override the values defined in the app's `.plist` file on macOS. See the [Apple docs][about-panel-options] for more details. On Linux, values must be set in order to be shown; there are no defaults.

@@ -1267,7 +1341,7 @@ 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
@@ -1283,7 +1357,7 @@ method returns false. If we fail to perform the copy, then this method will
 throw an error. The message in the error should be informative and tell
 you exactly what went wrong.

-By default, if an app of the same name as the one being moved exists in the Applications directory and is _not_ running, the existing app will be trashed and the active app moved into its place. If it _is_ running, the pre-existing running app will assume focus and the the previously active app will quit itself. This behavior can be changed by providing the optional conflict handler, where the boolean returned by the handler determines whether or not the move conflict is resolved with default behavior.  i.e. returning `false` will ensure no further action is taken, returning `true` will result in the default behavior and the method continuing.
+By default, if an app of the same name as the one being moved exists in the Applications directory and is _not_ running, the existing app will be trashed and the active app moved into its place. If it _is_ running, the pre-existing running app will assume focus and the previously active app will quit itself. This behavior can be changed by providing the optional conflict handler, where the boolean returned by the handler determines whether or not the move conflict is resolved with default behavior.  i.e. returning `false` will ensure no further action is taken, returning `true` will result in the default behavior and the method continuing.

 For example:

@@ -1403,7 +1477,7 @@ in your app's initialization to ensure that your overridden value is used.

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

 The intention is for these overrides to become disabled by default and then at
 some point in the future this property will be removed.  This property impacts
@@ -1411,3 +1485,12 @@ 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/auto-updater.md
+++ b/docs/api/auto-updater.md
@@ -104,7 +104,7 @@ The `autoUpdater` object has the following methods:
 * `options` Object
  * `url` String
  * `headers` Record<String, String> (optional) _macOS_ - HTTP request headers.
-  * `serverType` String (optional) _macOS_ - Either `json` or `default`, see the [Squirrel.Mac][squirrel-mac]
+  * `serverType` String (optional) _macOS_ - Can be `json` or `default`, see the [Squirrel.Mac][squirrel-mac]
    README for more information.

 Sets the `url` and initialize the auto updater.
--- a/docs/api/browser-view.md
+++ b/docs/api/browser-view.md
@@ -28,25 +28,6 @@ view.webContents.loadURL('https://electronjs.org')
 * `options` Object (optional)
  * `webPreferences` Object (optional) - See [BrowserWindow](browser-window.md).

-### Static Methods
-
-#### `BrowserView.getAllViews()`
-
-Returns `BrowserView[]` - An array of all opened BrowserViews.
-
-#### `BrowserView.fromWebContents(webContents)`
-
-* `webContents` [WebContents](web-contents.md)
-
-Returns `BrowserView | null` - The BrowserView that owns the given `webContents`
-or `null` if the contents are not owned by a BrowserView.
-
-#### `BrowserView.fromId(id)`
-
-* `id` Integer
-
-Returns `BrowserView` - The view with the given `id`.
-
 ### Instance Properties

 Objects created with `new BrowserView` have the following properties:
@@ -55,24 +36,10 @@ Objects created with `new BrowserView` have the following properties:

 A [`WebContents`](web-contents.md) object owned by this view.

-#### `view.id` _Experimental_
-
-A `Integer` representing the unique ID of the view.
-
 ### Instance Methods

 Objects created with `new BrowserView` have the following instance methods:

-#### `view.destroy()`
-
-Force closing the view, the `unload` and `beforeunload` events won't be emitted
-for the web page. After you're done with a view, call this function in order to
-free memory and other resources as soon as possible.
-
-#### `view.isDestroyed()`
-
-Returns `Boolean` - Whether the view is destroyed.
-
 #### `view.setAutoResize(options)` _Experimental_

 * `options` Object
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -38,7 +38,7 @@ the window after this event will have no visual flash:

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ show: false })
+const win = new BrowserWindow({ show: false })
 win.once('ready-to-show', () => {
  win.show()
 })
@@ -60,7 +60,7 @@ immediately, and use a `backgroundColor` close to your app's background:
 ```javascript
 const { BrowserWindow } = require('electron')

-let win = new BrowserWindow({ backgroundColor: '#2e2c29' })
+const win = new BrowserWindow({ backgroundColor: '#2e2c29' })
 win.loadURL('https://github.com')
 ```

@@ -74,8 +74,8 @@ By using `parent` option, you can create child windows:
 ```javascript
 const { BrowserWindow } = require('electron')

-let top = new BrowserWindow()
-let child = new BrowserWindow({ parent: top })
+const top = new BrowserWindow()
+const child = new BrowserWindow({ parent: top })
 child.show()
 top.show()
 ```
@@ -90,7 +90,7 @@ window, you have to set both `parent` and `modal` options:
 ```javascript
 const { BrowserWindow } = require('electron')

-let child = new BrowserWindow({ parent: top, modal: true, show: false })
+const child = new BrowserWindow({ parent: top, modal: true, show: false })
 child.loadURL('https://github.com')
 child.once('ready-to-show', () => {
  child.show()
@@ -207,11 +207,15 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
  * `opacity` Number (optional) - Set the initial opacity of the window, between 0.0 (fully
    transparent) and 1.0 (fully opaque). This is only implemented on Windows and macOS.
  * `darkTheme` Boolean (optional) - Forces using dark theme for the window, only works on
-    some GTK desktop environments. Default is [`nativeTheme.shouldUseDarkColors`](native-theme.md).
+    some GTK+3 desktop environments. Default is `false`.
  * `transparent` Boolean (optional) - Makes the window [transparent](frameless-window.md#transparent-window).
    Default is `false`. On Windows, does not work unless the window is frameless.
  * `type` String (optional) - The type of window, default is normal window. See more about
    this below.
+  * `visualEffectState` String (optional) - Specify how the material appearance should reflect window activity state on macOS. Must be used with the `vibrancy` property. Possible values are:
+    * `followWindow` - The backdrop should automatically appear active when the window is active, and inactive when it is not. This is the default.
+    * `active` - The backdrop should always appear active.
+    * `inactive` - The backdrop should always appear inactive.
  * `titleBarStyle` String (optional) - The style of window title bar.
    Default is `default`. Possible values are:
    * `default` - Results in the standard gray opaque Mac title
@@ -271,7 +275,7 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      the `nodeIntegration` option and the APIs available to the preload script
      are more limited. Read more about the option [here](sandbox-option.md).
    * `enableRemoteModule` Boolean (optional) - Whether to enable the [`remote`](remote.md) module.
-      Default is `true`.
+      Default is `false`.
    * `session` [Session](session.md#class-session) (optional) - Sets the session used by the
      page. Instead of passing the Session object directly, you can also choose to
      use the `partition` option instead, which accepts a partition string. When
@@ -348,6 +352,9 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      You can access this context in the dev tools by selecting the
      'Electron Isolated Context' entry in the combo box at the top of the
      Console tab.
+    * `worldSafeExecuteJavaScript` Boolean (optional) - If true, values returned from `webFrame.executeJavaScript` will be sanitized to ensure JS values
+      can't unsafely cross between worlds when using `contextIsolation`.  The default
+      is `false`. In Electron 12, the default will be changed to `true`. _Deprecated_
    * `nativeWindowOpen` Boolean (optional) - Whether to use native
      `window.open()`. Defaults to `false`. Child windows will always have node
      integration disabled unless `nodeIntegrationInSubFrames` is true. **Note:** This option is currently
@@ -387,6 +394,13 @@ It creates a new `BrowserWindow` with native properties as set by the `options`.
      Default is `true`.
    * `enableWebSQL` Boolean (optional) - Whether to enable the [WebSQL api](https://www.w3.org/TR/webdatabase/).
      Default is `true`.
+    * `v8CacheOptions` String (optional) - Enforces the v8 code caching policy
+      used by blink. Accepted values are
+      * `none` - Disables code caching
+      * `code` - Heuristic based code caching
+      * `bypassHeatCheck` - Bypass code caching heuristics but with lazy compilation
+      * `bypassHeatCheckAndEagerCompile` - Same as above except compilation is eager.
+      Default policy is `code`.

 When setting minimum or maximum window size with `minWidth`/`maxWidth`/
 `minHeight`/`maxHeight`, it only constrains the users. It won't prevent you from
@@ -527,6 +541,12 @@ 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:
@@ -542,12 +562,12 @@ 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.
@@ -590,7 +610,7 @@ e.g. `APPCOMMAND_BROWSER_BACKWARD` is emitted as `browser-backward`.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()
 win.on('app-command', (e, cmd) => {
  // Navigate the window back when the user hits their mouse back button
  if (cmd === 'browser-backward' && win.webContents.canGoBack()) {
@@ -656,6 +676,20 @@ Emitted when the window has closed a sheet.

 Emitted when the native new tab button is clicked.

+#### Event: 'system-context-menu' _Windows_
+
+Returns:
+
+* `event` Event
+* `point` [Point](structures/point.md) - The screen coordinates the context menu was triggered at
+
+Emitted when the system context menu is triggered on the window, this is
+normally only triggered when the user right clicks on the non-client area
+of your window.  This is the window titlebar or any area you have declared
+as `-webkit-app-region: drag` in a frameless window.
+
+Calling `event.preventDefault()` will prevent the menu from being displayed.
+
 ### Static Methods

 The `BrowserWindow` class has the following static methods:
@@ -685,7 +719,7 @@ Returns `BrowserWindow | null` - The window that owns the given `browserView`. I

 * `id` Integer

-Returns `BrowserWindow` - The window with the given `id`.
+Returns `BrowserWindow | null` - The window with the given `id`.

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

@@ -765,7 +799,7 @@ To check if a DevTools extension is installed you can run the following:
 ```javascript
 const { BrowserWindow } = require('electron')

-let installed = BrowserWindow.getDevToolsExtensions().hasOwnProperty('devtron')
+const installed = 'devtron' in BrowserWindow.getDevToolsExtensions()
 console.log(installed)
 ```

@@ -782,7 +816,7 @@ Objects created with `new BrowserWindow` have the following properties:
 ```javascript
 const { BrowserWindow } = require('electron')
 // In this example `win` is our instance
-let win = new BrowserWindow({ width: 800, height: 600 })
+const win = new BrowserWindow({ width: 800, height: 600 })
 win.loadURL('https://github.com')
 ```

@@ -1116,7 +1150,7 @@ Disable or enable the window.

 #### `win.isEnabled()`

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

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

@@ -1307,9 +1341,9 @@ a HTML-rendered toolbar. For example:

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()

-let toolbarRect = document.getElementById('toolbar').getBoundingClientRect()
+const toolbarRect = document.getElementById('toolbar').getBoundingClientRect()
 win.setSheetOffset(toolbarRect.height)
 ```

@@ -1433,7 +1467,7 @@ Node's [`url.format`](https://nodejs.org/api/url.html#url_url_format_urlobject)
 method:

 ```javascript
-let url = require('url').format({
+const url = require('url').format({
  protocol: 'file',
  slashes: true,
  pathname: require('path').join(__dirname, 'index.html')
@@ -1659,9 +1693,12 @@ Sets whether the menu bar should be visible. If the menu bar is auto-hide, users

 Returns `Boolean` - Whether the menu bar is visible.

-#### `win.setVisibleOnAllWorkspaces(visible)`
+#### `win.setVisibleOnAllWorkspaces(visible[, options])`

 * `visible` Boolean
+* `options` Object (optional)
+  * `visibleOnFullScreen` Boolean (optional) _macOS_ - Sets whether
+    the window should be visible above fullscreen windows

 Sets whether the window should be visible on all workspaces.

--- a/docs/api/client-request.md
+++ b/docs/api/client-request.md
@@ -171,6 +171,20 @@ lowercasing. It can be called only before first write. Calling this method after
 the first write will throw an error. If the passed value is not a `String`, its
 `toString()` method will be called to obtain the final value.

+Certain headers are restricted from being set by apps. These headers are
+listed below. More information on restricted headers can be found in
+[Chromium's header utils](https://source.chromium.org/chromium/chromium/src/+/master:services/network/public/cpp/header_util.cc;drc=1562cab3f1eda927938f8f4a5a91991fefde66d3;bpv=1;bpt=1;l=22).
+
+* `Content-Length`
+* `Host`
+* `Trailer` or `Te`
+* `Upgrade`
+* `Cookie2`
+* `Keep-Alive`
+* `Transfer-Encoding`
+
+Additionally, setting the `Connection` header to the value `upgrade` is also disallowed.
+
 #### `request.getHeader(name)`

 * `name` String - Specify an extra header name.
--- a/docs/api/command-line-switches.md
+++ b/docs/api/command-line-switches.md
@@ -36,6 +36,10 @@ for integrated authentication. Without `*` prefix the URL has to match exactly.
 A comma-separated list of servers for which delegation of user credentials is required.
 Without `*` prefix the URL has to match exactly.

+### --disable-ntlm-v2
+
+Disables NTLM v2 for posix platforms, no effect elsewhere.
+
 ### --disable-http-cache

 Disables the disk cache for HTTP requests.
@@ -194,6 +198,14 @@ logging level for all code in the source files under a `foo/bar` directory.

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

+### --force_high_performance_gpu
+
+Force using discrete GPU when there are multiple GPUs available.
+
+### --force_low_power_gpu
+
+Force using integrated GPU when there are multiple GPUs available.
+
 ## Node.js Flags

 Electron supports some of the [CLI flags][node-cli] supported by Node.js.
--- 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))
@@ -83,4 +83,4 @@ Returns `Promise<Object>` - Resolves with an object containing the `value` and `
 Get the maximum usage across processes of trace buffer as a percentage of the
 full state.

-[trace viewer]: https://github.com/catapult-project/catapult/blob/master/tracing
+[trace viewer]: https://chromium.googlesource.com/catapult/+/HEAD/tracing/README.md
--- a/docs/api/crash-reporter.md
+++ b/docs/api/crash-reporter.md
@@ -156,15 +156,21 @@ parameters in a renderer process will not result in those parameters being sent
 with crashes that occur in other renderer processes or in the main process.

 **Note:** Parameters have limits on the length of the keys and values. Key
-names must be no longer than 39 bytes, and values must be no longer than 127
+names must be no longer than 39 bytes, and values must be no longer than 20320
 bytes. Keys with names longer than the maximum will be silently ignored. Key
 values longer than the maximum length will be truncated.

+**Note:** On linux values that are longer than 127 bytes will be chunked into
+multiple keys, each 127 bytes in length.  E.g. `addExtraParameter('foo', 'a'.repeat(130))`
+will result in two chunked keys `foo__1` and `foo__2`, the first will contain
+the first 127 bytes and the second will contain the remaining 3 bytes.  On
+your crash reporting backend you should stitch together keys in this format.
+
 ### `crashReporter.removeExtraParameter(key)`

 * `key` String - Parameter key, must be no longer than 39 bytes.

-Remove a extra parameter from the current set of parameters. Future crashes
+Remove an extra parameter from the current set of parameters. Future crashes
 will not include this parameter.

 ### `crashReporter.getParameters()`
--- a/docs/api/debugger.md
+++ b/docs/api/debugger.md
@@ -9,7 +9,7 @@ runtime that allows interacting with pages and instrumenting them.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()

 try {
  win.webContents.debugger.attach('1.1')
@@ -52,6 +52,8 @@ Returns:
 * `method` String - Method name.
 * `params` any - Event parameters defined by the 'parameters'
   attribute in the remote debugging protocol.
+* `sessionId` String - Unique identifier of attached debugging session,
+   will match the value sent from `debugger.sendCommand`.

 Emitted whenever the debugging target issues an instrumentation event.

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

 Detaches the debugger from the `webContents`.

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

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

 Returns `Promise<any>` - A promise that resolves with the response defined by
 the 'returns' attribute of the command description in the remote debugging protocol
--- a/docs/api/dialog.md
+++ b/docs/api/dialog.md
@@ -269,7 +269,7 @@ Shows a message box, it will block the process until the message box is closed.
 It returns the index of the clicked button.

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

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

--- a/docs/api/download-item.md
+++ b/docs/api/download-item.md
@@ -11,7 +11,7 @@ control the download item.
 ```javascript
 // In the main process.
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()
 win.webContents.session.on('will-download', (event, item, webContents) => {
  // Set the save path, making Electron not to prompt a save dialog.
  item.setSavePath('/tmp/save.pdf')
--- a/docs/api/extensions.md
+++ b/docs/api/extensions.md
@@ -102,3 +102,15 @@ The following methods of `chrome.tabs` are supported:
 > **Note:** In Chrome, passing `-1` as a tab ID signifies the "currently active
 > tab". Since Electron has no such concept, passing `-1` as a tab ID is not
 > supported and will raise an error.
+
+### `chrome.management`
+
+The following methods of `chrome.management` are supported:
+
+- `chrome.management.getAll`
+- `chrome.management.get`
+- `chrome.management.getSelf`
+- `chrome.management.getPermissionWarningsById`
+- `chrome.management.getPermissionWarningsByManifest`
+- `chrome.management.onEnabled`
+- `chrome.management.onDisabled`
--- a/docs/api/frameless-window.md
+++ b/docs/api/frameless-window.md
@@ -15,7 +15,7 @@ To create a frameless window, you need to set `frame` to `false` in

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ width: 800, height: 600, frame: false })
+const win = new BrowserWindow({ width: 800, height: 600, frame: false })
 win.show()
 ```

@@ -33,7 +33,7 @@ Results in a hidden title bar and a full size content window, yet the title bar

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ titleBarStyle: 'hidden' })
+const win = new BrowserWindow({ titleBarStyle: 'hidden' })
 win.show()
 ```

@@ -43,7 +43,7 @@ Results in a hidden title bar with an alternative look where the traffic light b

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ titleBarStyle: 'hiddenInset' })
+const win = new BrowserWindow({ titleBarStyle: 'hiddenInset' })
 win.show()
 ```

@@ -58,7 +58,7 @@ This option is only applicable for frameless windows.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ titleBarStyle: 'customButtonsOnHover', frame: false })
+const win = new BrowserWindow({ titleBarStyle: 'customButtonsOnHover', frame: false })
 win.show()
 ```

@@ -69,7 +69,7 @@ window transparent:

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ transparent: true, frame: false })
+const win = new BrowserWindow({ transparent: true, frame: false })
 win.show()
 ```

@@ -100,7 +100,7 @@ API:

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()
 win.setIgnoreMouseEvents(true)
 ```

@@ -112,8 +112,8 @@ optional parameter can be used to forward mouse move messages to the web page,
 allowing events such as `mouseleave` to be emitted:

 ```javascript
-let win = require('electron').remote.getCurrentWindow()
-let el = document.getElementById('clickThroughElement')
+const win = require('electron').remote.getCurrentWindow()
+const el = document.getElementById('clickThroughElement')
 el.addEventListener('mouseenter', () => {
  win.setIgnoreMouseEvents(true, { forward: true })
 })
--- 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[]

@@ -148,4 +148,4 @@ found in the [`ipc-main-invoke-event`](structures/ipc-main-invoke-event.md)
 structure docs.

 [event-emitter]: https://nodejs.org/api/events.html#events_class_eventemitter
-[web-contents-send]: web-contents.md#contentssendchannel-arg1-arg2-
+[web-contents-send]: web-contents.md#contentssendchannel-args
--- a/docs/api/ipc-renderer.md
+++ b/docs/api/ipc-renderer.md
@@ -108,7 +108,7 @@ ipcMain.handle('some-name', async (event, someArgument) => {

 If you need to transfer a [`MessagePort`][] to the main process, use [`ipcRenderer.postMessage`](#ipcrendererpostmessagechannel-message-transfer).

-If you do not need a respons to the message, consider using [`ipcRenderer.send`](#ipcrenderersendchannel-args).
+If you do not need a response to the message, consider using [`ipcRenderer.send`](#ipcrenderersendchannel-args).

 ### `ipcRenderer.sendSync(channel, ...args)`

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

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

 * `appMenu` - Whole default "App" menu (About, Services, etc.)
-* `about` - Map to the `orderFrontStandardAboutPanel` action.
 * `hide` - Map to the `hide` action.
 * `hideOthers` - Map to the `hideOtherApplications` action.
 * `unhide` - Map to the `unhideAllApplications` action.
--- a/docs/api/menu.md
+++ b/docs/api/menu.md
@@ -96,7 +96,7 @@ Appends the `menuItem` to the menu.

 * `id` String

-Returns `MenuItem` the item with the specified `id`
+Returns `MenuItem | null` the item with the specified `id`

 #### `menu.insert(pos, menuItem)`

@@ -195,8 +195,8 @@ const template = [
        {
          label: 'Speech',
          submenu: [
-            { role: 'startspeaking' },
-            { role: 'stopspeaking' }
+            { role: 'startSpeaking' },
+            { role: 'stopSpeaking' }
          ]
        }
      ] : [
@@ -211,12 +211,12 @@ const template = [
    label: 'View',
    submenu: [
      { role: 'reload' },
-      { role: 'forcereload' },
-      { role: 'toggledevtools' },
+      { role: 'forceReload' },
+      { role: 'toggleDevTools' },
      { type: 'separator' },
-      { role: 'resetzoom' },
-      { role: 'zoomin' },
-      { role: 'zoomout' },
+      { role: 'resetZoom' },
+      { role: 'zoomIn' },
+      { role: 'zoomOut' },
      { type: 'separator' },
      { role: 'togglefullscreen' }
    ]
--- a/docs/api/modernization/overview.md
+++ b/docs/api/modernization/overview.md
@@ -1,6 +1,6 @@
 ## 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 intiative can be tracked in the [promisification](promisification.md) tracking file.
+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.

--- a/docs/api/native-image.md
+++ b/docs/api/native-image.md
@@ -119,6 +119,13 @@ Returns `NativeImage`

 Creates an empty `NativeImage` instance.

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

 * `path` String
--- a/docs/api/native-theme.md
+++ b/docs/api/native-theme.md
@@ -58,7 +58,7 @@ Your application should then always use `shouldUseDarkColors` to determine what
 ### `nativeTheme.shouldUseHighContrastColors` _macOS_ _Windows_ _Readonly_

 A `Boolean` for if the OS / Chromium currently has high-contrast mode enabled
-or is being instructed to show a high-constrast UI.
+or is being instructed to show a high-contrast UI.

 ### `nativeTheme.shouldUseInvertedColorScheme` _macOS_ _Windows_ _Readonly_

--- a/docs/api/power-monitor.md
+++ b/docs/api/power-monitor.md
@@ -8,19 +8,19 @@ Process: [Main](../glossary.md#main-process)

 The `powerMonitor` module emits the following events:

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

 Emitted when the system is suspending.

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

 Emitted when system is resuming.

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

 Emitted when the system changes to AC power.

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

 Emitted when system changes to battery power.

--- a/docs/api/protocol-ns.md
+++ b/docs/api/protocol-ns.md
@@ -1,309 +0,0 @@
-# protocol (NetworkService) (Draft)
-
-This document describes the new protocol APIs based on the [NetworkService](https://www.chromium.org/servicification).
-
-We don't currently have an estimate of when we will enable the `NetworkService` by
-default in Electron, but as Chromium is already removing non-`NetworkService`
-code, we will probably switch before Electron 10.
-
-The content of this document should be moved to `protocol.md` after we have
-enabled the `NetworkService` by default in Electron.
-
-> Register a custom protocol and intercept existing protocol requests.
-
-Process: [Main](../glossary.md#main-process)
-
-An example of implementing a protocol that has the same effect as the
-`file://` protocol:
-
-```javascript
-const { app, protocol } = require('electron')
-const path = require('path')
-
-app.whenReady().then(() => {
-  protocol.registerFileProtocol('atom', (request, callback) => {
-    const url = request.url.substr(7)
-    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  })
-})
-```
-
-**Note:** All methods unless specified can only be used after the `ready` event
-of the `app` module gets emitted.
-
-## Using `protocol` with a custom `partition` or `session`
-
-A protocol is registered to a specific Electron [`session`](./session.md)
-object. If you don't specify a session, then your `protocol` will be applied to
-the default session that Electron uses. However, if you define a `partition` or
-`session` on your `browserWindow`'s `webPreferences`, then that window will use
-a different session and your custom protocol will not work if you just use
-`electron.protocol.XXX`.
-
-To have your custom protocol work in combination with a custom session, you need
-to register it to that session explicitly.
-
-```javascript
-const { session, app, protocol } = require('electron')
-const path = require('path')
-
-app.whenReady().then(() => {
-  const partition = 'persist:example'
-  const ses = session.fromPartition(partition)
-
-  ses.protocol.registerFileProtocol('atom', (request, callback) => {
-    const url = request.url.substr(7)
-    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  })
-
-  mainWindow = new BrowserWindow({ webPreferences: { partition } })
-})
-```
-
-## Methods
-
-The `protocol` module has the following methods:
-
-### `protocol.registerSchemesAsPrivileged(customSchemes)`
-
-* `customSchemes` [CustomScheme[]](structures/custom-scheme.md)
-
-**Note:** This method can only be used before the `ready` event of the `app`
-module gets emitted and can be called only once.
-
-Registers the `scheme` as standard, secure, bypasses content security policy for
-resources, allows registering ServiceWorker and supports fetch API. Specify a
-privilege with the value of `true` to enable the capability.
-
-An example of registering a privileged scheme, that bypasses Content Security
-Policy:
-
-```javascript
-const { protocol } = require('electron')
-protocol.registerSchemesAsPrivileged([
-  { scheme: 'foo', privileges: { bypassCSP: true } }
-])
-```
-
-A standard scheme adheres to what RFC 3986 calls [generic URI
-syntax](https://tools.ietf.org/html/rfc3986#section-3). For example `http` and
-`https` are standard schemes, while `file` is not.
-
-Registering a scheme as standard allows relative and absolute resources to
-be resolved correctly when served. Otherwise the scheme will behave like the
-`file` protocol, but without the ability to resolve relative URLs.
-
-For example when you load following page with custom protocol without
-registering it as standard scheme, the image will not be loaded because
-non-standard schemes can not recognize relative URLs:
-
-```html
-<body>
-  <img src='test.png'>
-</body>
-```
-
-Registering a scheme as standard will allow access to files through the
-[FileSystem API][file-system-api]. Otherwise the renderer will throw a security
-error for the scheme.
-
-By default web storage apis (localStorage, sessionStorage, webSQL, indexedDB,
-cookies) are disabled for non standard schemes. So in general if you want to
-register a custom protocol to replace the `http` protocol, you have to register
-it as a standard scheme.
-
-### `protocol.registerFileProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a file as the response. The
-`handler` will be called with `request` and `callback` where `request` is
-an incoming request for the `scheme`.
-
-To handle the `request`, the `callback` should be called with either the file's
-path or an object that has a `path` property, e.g. `callback(filePath)` or
-`callback({ path: filePath })`. The `filePath` must be an absolute path.
-
-By default the `scheme` is treated like `http:`, which is parsed differently
-from protocols that follow the "generic URI syntax" like `file:`.
-
-### `protocol.registerBufferProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a `Buffer` as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `Buffer` object or an object that has the `data`
-property.
-
-Example:
-
-```javascript
-protocol.registerBufferProtocol('atom', (request, callback) => {
-  callback({ mimeType: 'text/html', data: Buffer.from('<h5>Response</h5>') })
-})
-```
-
-### `protocol.registerStringProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a `String` as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with either a `String` or an object that has the `data`
-property.
-
-### `protocol.registerHttpProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` ProtocolResponse
-
-Registers a protocol of `scheme` that will send an HTTP request as a response.
-
-The usage is the same with `registerFileProtocol`, except that the `callback`
-should be called with an object that has the `url` property.
-
-### `protocol.registerStreamProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))
-
-Registers a protocol of `scheme` that will send a stream as a response.
-
-The usage is the same with `registerFileProtocol`, except that the
-`callback` should be called with either a [`ReadableStream`](https://nodejs.org/api/stream.html#stream_class_stream_readable) object or an object that
-has the `data` property.
-
-Example:
-
-```javascript
-const { protocol } = require('electron')
-const { PassThrough } = require('stream')
-
-function createStream (text) {
-  const rv = new PassThrough() // PassThrough is also a Readable stream
-  rv.push(text)
-  rv.push(null)
-  return rv
-}
-
-protocol.registerStreamProtocol('atom', (request, callback) => {
-  callback({
-    statusCode: 200,
-    headers: {
-      'content-type': 'text/html'
-    },
-    data: createStream('<h5>Response</h5>')
-  })
-})
-```
-
-It is possible to pass any object that implements the readable stream API (emits
-`data`/`end`/`error` events). For example, here's how a file could be returned:
-
-```javascript
-protocol.registerStreamProtocol('atom', (request, callback) => {
-  callback(fs.createReadStream('index.html'))
-})
-```
-
-### `protocol.unregisterProtocol(scheme)`
-
-* `scheme` String
-
-Unregisters the custom protocol of `scheme`.
-
-### `protocol.isProtocolRegistered(scheme)`
-
-* `scheme` String
-
-Returns `Boolean` - Whether `scheme` is already registered.
-
-### `protocol.interceptFileProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a file as a response.
-
-### `protocol.interceptStringProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (String | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a `String` as a response.
-
-### `protocol.interceptBufferProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (Buffer | [ProtocolResponse](structures/protocol-response.md))
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a `Buffer` as a response.
-
-### `protocol.interceptHttpProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` ProtocolResponse
-
-Intercepts `scheme` protocol and uses `handler` as the protocol's new handler
-which sends a new HTTP request as a response.
-
-### `protocol.interceptStreamProtocol(scheme, handler)`
-
-* `scheme` String
-* `handler` Function
-  * `request` ProtocolRequest
-  * `callback` Function
-    * `response` (ReadableStream | [ProtocolResponse](structures/protocol-response.md))
-
-Same as `protocol.registerStreamProtocol`, except that it replaces an existing
-protocol handler.
-
-### `protocol.uninterceptProtocol(scheme)`
-
-* `scheme` String
-
-Remove the interceptor installed for `scheme` and restore its original handler.
-
-### `protocol.isProtocolIntercepted(scheme)`
-
-* `scheme` String
-
-Returns `Boolean` - Whether `scheme` is already intercepted.
-
-[file-system-api]: https://developer.mozilla.org/en-US/docs/Web/API/LocalFileSystem
--- a/docs/api/protocol.md
+++ b/docs/api/protocol.md
@@ -15,8 +15,6 @@ app.whenReady().then(() => {
  protocol.registerFileProtocol('atom', (request, callback) => {
    const url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  }, (error) => {
-    if (error) console.error('Failed to register protocol')
  })
 })
 ```
@@ -26,9 +24,15 @@ of the `app` module gets emitted.

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

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

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

 ```javascript
 const { session, app, protocol } = require('electron')
@@ -41,17 +45,9 @@ app.whenReady().then(() => {
  ses.protocol.registerFileProtocol('atom', (request, callback) => {
    const url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
-  }, (error) => {
-    if (error) console.error('Failed to register protocol')
  })

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

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

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

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

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

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

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

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

@@ -102,168 +98,107 @@ Registering a scheme as standard will allow access to files through the
 [FileSystem API][file-system-api]. Otherwise the renderer will throw a security
 error for the scheme.

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

-`protocol.registerSchemesAsPrivileged` can be used to replicate the functionality of the previous `protocol.registerStandardSchemes`, `webFrame.registerURLSchemeAs*` and `protocol.registerServiceWorkerSchemes` functions that existed prior to Electron 5.0.0, for example:
+Protocols that use streams (http and stream protocols) should set `stream: true`.
+The `<video>` and `<audio>` HTML elements expect protocols to buffer their
+responses by default. The `stream` flag configures those elements to correctly
+expect streaming responses.

-**before (<= v4.x)**
-```javascript
-// Main
-protocol.registerStandardSchemes(['scheme1', 'scheme2'], { secure: true })
-// Renderer
-webFrame.registerURLSchemeAsPrivileged('scheme1', { secure: true })
-webFrame.registerURLSchemeAsPrivileged('scheme2', { secure: true })
-```
-
-**after (>= v5.x)**
-```javascript
-protocol.registerSchemesAsPrivileged([
-  { scheme: 'scheme1', privileges: { standard: true, secure: true } },
-  { scheme: 'scheme2', privileges: { standard: true, secure: true } }
-])
-```
-
-### `protocol.registerFileProtocol(scheme, handler[, completion])`
+### `protocol.registerFileProtocol(scheme, handler)`

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

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

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

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

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

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

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

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

 Example:

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

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

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

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

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

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

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

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

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

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

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

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

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

 Example:

@@ -286,8 +221,6 @@ protocol.registerStreamProtocol('atom', (request, callback) => {
    },
    data: createStream('<h5>Response</h5>')
  })
-}, (error) => {
-  if (error) console.error('Failed to register protocol')
 })
 ```

@@ -295,132 +228,102 @@ It is possible to pass any object that implements the readable stream API (emits
 `data`/`end`/`error` events). For example, here's how a file could be returned:

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

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

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

 Unregisters the custom protocol of `scheme`.

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

 * `scheme` String

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

-[net-error]: https://code.google.com/p/chromium/codesearch#chromium/src/net/base/net_error_list.h
+### `protocol.isProtocolIntercepted(scheme)`
+
+* `scheme` String
+
+Returns `Boolean` - Whether `scheme` is already intercepted.
+
 [file-system-api]: https://developer.mozilla.org/en-US/docs/Web/API/LocalFileSystem
--- a/docs/api/remote.md
+++ b/docs/api/remote.md
@@ -17,7 +17,7 @@ renderer process:

 ```javascript
 const { BrowserWindow } = require('electron').remote
-let win = new BrowserWindow({ width: 800, height: 600 })
+const win = new BrowserWindow({ width: 800, height: 600 })
 win.loadURL('https://github.com')
 ```

--- a/docs/api/screen.md
+++ b/docs/api/screen.md
@@ -33,8 +33,8 @@ const { app, BrowserWindow, screen } = require('electron')
 let win

 app.whenReady().then(() => {
-  let displays = screen.getAllDisplays()
-  let externalDisplay = displays.find((display) => {
+  const displays = screen.getAllDisplays()
+  const externalDisplay = displays.find((display) => {
    return display.bounds.x !== 0 || display.bounds.y !== 0
  })

--- a/docs/api/service-workers.md
+++ b/docs/api/service-workers.md
@@ -39,7 +39,7 @@ Returns:
  * `message` String - The actual console message
  * `versionId` Number - The version ID of the service worker that sent the log message
  * `source` String - The type of source for this message.  Can be `javascript`, `xml`, `network`, `console-api`, `storage`, `app-cache`, `rendering`, `security`, `deprecation`, `worker`, `violation`, `intervention`, `recommendation` or `other`.
-  * `level` Number - The log level, from 0 to 3.  In order it matches `verbose`, `info`, `warning` and `error`.
+  * `level` Number - The log level, from 0 to 3. In order it matches `verbose`, `info`, `warning` and `error`.
  * `sourceUrl` String - The URL the message came from
  * `lineNumber` Number - The line number of the source that triggered this console message

--- a/docs/api/session.md
+++ b/docs/api/session.md
@@ -12,7 +12,7 @@ property of [`WebContents`](web-contents.md), or from the `session` module.
 ```javascript
 const { BrowserWindow } = require('electron')

-let win = new BrowserWindow({ width: 800, height: 600 })
+const win = new BrowserWindow({ width: 800, height: 600 })
 win.loadURL('http://github.com')

 const ses = win.webContents.session
@@ -332,7 +332,7 @@ verify proc.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()

 win.webContents.session.setCertificateVerifyProc((request, callback) => {
  const { hostname } = request
@@ -348,8 +348,17 @@ win.webContents.session.setCertificateVerifyProc((request, callback) => {

 * `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 - Enum of 'media', 'geolocation', 'notifications', 'midiSysex',
-    'pointerLock', 'fullscreen', 'openExternal'.
+  * `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.
+    * `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.
+    * `midi` - Request MIDI access in the `webmidi` API.
+    * `midiSysex` - Request the use of system exclusive messages in the `webmidi` API.
+    * `pointerLock` - Request to directly interpret mouse movements as an input method. Click [here](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_API) to know more.
+    * `fullscreen` - Request for the app to enter fullscreen mode.
+    * `openExternal` - Request to open links in external applications.
  * `callback` Function
    * `permissionGranted` Boolean - Allow or deny the permission.
  * `details` Object - Some properties are only available on certain permission types.
@@ -376,12 +385,12 @@ session.fromPartition('some-partition').setPermissionRequestHandler((webContents

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

-* `handler` Function<Boolean> | null
+* `handler` Function\<Boolean> | null
  * `webContents` [WebContents](web-contents.md) - WebContents checking the permission.  Please note that if the request comes from a subframe you should use `requestingUrl` to check the request origin.
  * `permission` String - Enum of 'media'.
  * `requestingOrigin` String - The origin URL of the permission check
  * `details` Object - Some properties are only available on certain permission types.
-    * `securityOrigin` String - The security orign of the `media` check.
+    * `securityOrigin` String - The security origin of the `media` check.
    * `mediaType` String - The type of media access being requested, can be `video`,
      `audio` or `unknown`
    * `requestingUrl` String - The last URL the requesting frame loaded
@@ -518,7 +527,7 @@ Returns `String[]` - An array of language codes the spellchecker is enabled for.
 will fallback to using `en-US`.  By default on launch if this setting is an empty list Electron will try to populate this
 setting with the current OS locale.  This setting is persisted across restarts.

-**Note:** On macOS the OS spellchecker is used and has it's own list of languages.  This API is a no-op on macOS.
+**Note:** On macOS the OS spellchecker is used and has its own list of languages.  This API is a no-op on macOS.

 #### `ses.setSpellCheckerDictionaryDownloadURL(url)`

@@ -655,7 +664,7 @@ const path = require('path')
 app.whenReady().then(() => {
  const protocol = session.fromPartition('some-partition').protocol
  protocol.registerFileProtocol('atom', (request, callback) => {
-    let url = request.url.substr(7)
+    const url = request.url.substr(7)
    callback({ path: path.normalize(`${__dirname}/${url}`) })
  }, (error) => {
    if (error) console.error('Failed to register protocol')
--- a/docs/api/shell.md
+++ b/docs/api/shell.md
@@ -30,7 +30,7 @@ Show the given file in a file manager. If possible, select the file.

 * `path` String

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

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

--- a/docs/api/structures/custom-scheme.md
+++ b/docs/api/structures/custom-scheme.md
@@ -8,3 +8,4 @@
  * `allowServiceWorkers` Boolean (optional) - Default false.
  * `supportFetchAPI` Boolean (optional) - Default false.
  * `corsEnabled` Boolean (optional) - Default false.
+  * `stream` Boolean (optional) - Default false.
--- a/docs/api/structures/desktop-capturer-source.md
+++ b/docs/api/structures/desktop-capturer-source.md
@@ -19,5 +19,5 @@
  available.
 * `appIcon` [NativeImage](../native-image.md) - An icon image of the
  application that owns the window or null if the source has a type screen.
-  The size of the icon is not known in advance and depends on what the
+  The size of the icon is not known in advance and depends on what
  the application provides.
--- a/docs/api/structures/keyboard-event.md
+++ b/docs/api/structures/keyboard-event.md
@@ -1,4 +1,4 @@
-# KeyboardEvent Object extends `Event`
+# KeyboardEvent Object

 * `ctrlKey` Boolean (optional) - whether the Control key was used in an accelerator to trigger the Event
 * `metaKey` Boolean (optional) - whether a meta key was used in an accelerator to trigger the Event
--- a/docs/api/structures/printer-info.md
+++ b/docs/api/structures/printer-info.md
@@ -7,7 +7,7 @@
 * `isDefault` Boolean - whether or not a given printer is set as the default printer on the OS.
 * `options` Object - an object containing a variable number of platform-specific printer information.

-The number represented by `status` means different things on different platforms: on Windows it's potential values can be found [here](https://docs.microsoft.com/en-us/windows/win32/printdocs/printer-info-2), and on Linux and macOS they can be found [here](https://www.cups.org/doc/cupspm.html).
+The number represented by `status` means different things on different platforms: on Windows its potential values can be found [here](https://docs.microsoft.com/en-us/windows/win32/printdocs/printer-info-2), and on Linux and macOS they can be found [here](https://www.cups.org/doc/cupspm.html).

 ## Example

--- a/docs/api/structures/process-metric.md
+++ b/docs/api/structures/process-metric.md
@@ -11,6 +11,8 @@
  * `Pepper Plugin`
  * `Pepper Plugin Broker`
  * `Unknown`
+* `name` String (optional) - The name of the process. i.e. for plugins it might be Flash.
+    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.
    The time is represented as number of milliseconds since epoch.
--- a/docs/api/structures/product.md
+++ b/docs/api/structures/product.md
@@ -7,4 +7,5 @@
 * `contentLengths` Number[] - The total size of the content, in bytes.
 * `price` Number - The cost of the product in the local currency.
 * `formattedPrice` String - The locale formatted price of the product.
+* `currencyCode` String - 3 character code presenting a product's currency based on the ISO 4217 standard.
 * `isDownloadable` Boolean - A Boolean value that indicates whether the App Store has downloadable content for this product. `true` if at least one file has been associated with the product.
--- a/docs/api/structures/protocol-request.md
+++ b/docs/api/structures/protocol-request.md
@@ -4,3 +4,4 @@
 * `referrer` String
 * `method` String
 * `uploadData` [UploadData[]](upload-data.md) (optional)
+* `headers` Record<String, String>
--- a/docs/api/structures/stream-protocol-response.md
+++ b/docs/api/structures/stream-protocol-response.md
@@ -1,5 +0,0 @@
-# StreamProtocolResponse Object
-
-* `statusCode` Number (optional) - The HTTP response code.
-* `headers` Record<String, String | String[]> (optional) - An object containing the response headers.
-* `data` ReadableStream | null - A Node.js readable stream representing the response body.
--- a/docs/api/structures/string-protocol-response.md
+++ b/docs/api/structures/string-protocol-response.md
@@ -1,5 +0,0 @@
-# StringProtocolResponse Object
-
-* `mimeType` String (optional) - MIME type of the response.
-* `charset` String (optional) - Charset of the response.
-* `data` String | null - A string representing the response body.
--- a/docs/api/structures/trace-config.md
+++ b/docs/api/structures/trace-config.md
@@ -6,7 +6,7 @@
 * `trace_buffer_size_in_events` number (optional) - maximum size of the trace
  recording buffer in events.
 * `enable_argument_filter` boolean (optional) - if true, filter event data
-  according to a whitelist of events that have been manually vetted to not
+  according to a specific list of events that have been manually vetted to not
  include any PII. See [the implementation in
  Chromium][trace_event_args_whitelist.cc] for specifics.
 * `included_categories` String[] (optional) - a list of tracing categories to
@@ -41,7 +41,7 @@ An example TraceConfig that roughly matches what Chrome DevTools records:
    'disabled-by-default-v8.cpu_profiler',
    'disabled-by-default-v8.cpu_profiler.hires'
  ],
-  excluded_categories: [ '*' ]
+  excluded_categories: ['*']
 }
 ```

--- a/docs/api/system-preferences.md
+++ b/docs/api/system-preferences.md
@@ -209,7 +209,7 @@ not (transparent windows won't work correctly when DWM composition is disabled):

 ```javascript
 const { BrowserWindow, systemPreferences } = require('electron')
-let browserOptions = { width: 1000, height: 800 }
+const browserOptions = { width: 1000, height: 800 }

 // Make the window transparent only if the platform supports it.
 if (process.platform !== 'win32' || systemPreferences.isAeroGlassEnabled()) {
@@ -218,7 +218,7 @@ if (process.platform !== 'win32' || systemPreferences.isAeroGlassEnabled()) {
 }

 // Create the window.
-let win = new BrowserWindow(browserOptions)
+const win = new BrowserWindow(browserOptions)

 // Navigate.
 if (browserOptions.transparent) {
@@ -406,7 +406,7 @@ systemPreferences.promptTouchID('To get consent for a Security-Gated Thing').the
 })
 ```

-This API itself will not protect your user data; rather, it is a mechanism to allow you to do so. Native apps will need to set [Access Control Constants](https://developer.apple.com/documentation/security/secaccesscontrolcreateflags?language=objc) like [`kSecAccessControlUserPresence`](https://developer.apple.com/documentation/security/secaccesscontrolcreateflags/ksecaccesscontroluserpresence?language=objc) on the their keychain entry so that reading it would auto-prompt for Touch ID biometric consent. This could be done with [`node-keytar`](https://github.com/atom/node-keytar), such that one would store an encryption key with `node-keytar` and only fetch it if `promptTouchID()` resolves.
+This API itself will not protect your user data; rather, it is a mechanism to allow you to do so. Native apps will need to set [Access Control Constants](https://developer.apple.com/documentation/security/secaccesscontrolcreateflags?language=objc) like [`kSecAccessControlUserPresence`](https://developer.apple.com/documentation/security/secaccesscontrolcreateflags/ksecaccesscontroluserpresence?language=objc) on their keychain entry so that reading it would auto-prompt for Touch ID biometric consent. This could be done with [`node-keytar`](https://github.com/atom/node-keytar), such that one would store an encryption key with `node-keytar` and only fetch it if `promptTouchID()` resolves.

 **NOTE:** This API will return a rejected Promise on macOS systems older than Sierra 10.12.2.

@@ -416,7 +416,7 @@ This API itself will not protect your user data; rather, it is a mechanism to al

 Returns `Boolean` - `true` if the current process is a trusted accessibility client and `false` if it is not.

-### `systemPreferences.getMediaAccessStatus(mediaType)` _macOS_
+### `systemPreferences.getMediaAccessStatus(mediaType)` _Windows_ _macOS_

 * `mediaType` String - Can be `microphone`, `camera` or `screen`.

@@ -426,6 +426,9 @@ This user consent was not required on macOS 10.13 High Sierra or lower so this m
 macOS 10.14 Mojave or higher requires consent for `microphone` and `camera` access.
 macOS 10.15 Catalina or higher requires consent for `screen` access.

+Windows 10 has a global setting controlling `microphone` and `camera` access for all win32 applications.
+It will always return `granted` for `screen` and for all media types on older versions of Windows.
+
 ### `systemPreferences.askForMediaAccess(mediaType)` _macOS_

 * `mediaType` String - the type of media being requested; can be `microphone`, `camera`.
--- a/docs/api/touch-bar-button.md
+++ b/docs/api/touch-bar-button.md
@@ -41,6 +41,10 @@ the button in the touch bar.
 A `NativeImage` representing the button's current icon. Changing this value immediately updates the button
 in the touch bar.

+#### `touchBarButton.iconPosition`
+
+A `String` - Can be `left`, `right` or `overlay`.  Defaults to `overlay`.
+
 #### `touchBarButton.enabled`

 A `Boolean` representing whether the button is in an enabled state.
--- a/docs/api/touch-bar-segmented-control.md
+++ b/docs/api/touch-bar-segmented-control.md
@@ -49,3 +49,7 @@ updates the control in the touch bar. Updating deep properties inside this array

 An `Integer` representing the currently selected segment. Changing this value immediately updates the control
 in the touch bar. User interaction with the touch bar will update this value automatically.
+
+#### `touchBarSegmentedControl.mode`
+
+A `String` representing the current selection mode of the control.  Can be `single`, `multiple` or `buttons`.
--- a/docs/api/touch-bar-spacer.md
+++ b/docs/api/touch-bar-spacer.md
@@ -11,3 +11,11 @@ Process: [Main](../tutorial/application-architecture.md#main-and-renderer-proces
    * `small` - Small space between items. Maps to `NSTouchBarItemIdentifierFixedSpaceSmall`. This is the default.
    * `large` - Large space between items. Maps to `NSTouchBarItemIdentifierFixedSpaceLarge`.
    * `flexible` - Take up all available space. Maps to `NSTouchBarItemIdentifierFlexibleSpace`.
+
+### Instance Properties
+
+The following properties are available on instances of `TouchBarSpacer`:
+
+#### `touchBarSpacer.size`
+
+A `String` representing the size of the spacer.  Can be `small`, `large` or `flexible`.
--- a/docs/api/tray.md
+++ b/docs/api/tray.md
@@ -217,9 +217,11 @@ Sets the `image` associated with this tray icon when pressed on macOS.

 Sets the hover text for this tray icon.

-#### `tray.setTitle(title)` _macOS_
+#### `tray.setTitle(title[, options])` _macOS_

 * `title` String
+* `options` Object (optional)
+  * `fontType` String (optional) - The font family variant to display, can be `monospaced` or `monospacedDigit`. `monospaced` is available in macOS 10.15+ and `monospacedDigit` is available in macOS 10.11+.  When left blank, the title uses the default system font.

 Sets the title displayed next to the tray icon in the status bar (Support ANSI colors).

--- a/docs/api/web-contents.md
+++ b/docs/api/web-contents.md
@@ -12,10 +12,10 @@ the [`BrowserWindow`](browser-window.md) object. An example of accessing the
 ```javascript
 const { BrowserWindow } = require('electron')

-let win = new BrowserWindow({ width: 800, height: 1500 })
+const win = new BrowserWindow({ width: 800, height: 1500 })
 win.loadURL('http://github.com')

-let contents = win.webContents
+const contents = win.webContents
 console.log(contents)
 ```

@@ -42,7 +42,8 @@ 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.

 ## Class: WebContents

@@ -256,7 +257,7 @@ Returns:
 Emitted after a server side redirect occurs during navigation.  For example a 302
 redirect.

-This event can not be prevented, if you want to prevent redirects you should
+This event cannot be prevented, if you want to prevent redirects you should
 checkout out the `will-redirect` event above.

 #### Event: 'did-navigate'
@@ -348,7 +349,7 @@ Returns:
 Emitted when the renderer process crashes or is killed.

 **Deprecated:** This event is superceded by the `render-process-gone` event
-which contains more information about why the render process dissapeared. It
+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.

@@ -364,10 +365,10 @@ Returns:
    * `killed` - Process was sent a SIGTERM or otherwise killed externally
    * `crashed` - Process crashed
    * `oom` - Process ran out of memory
-    * `launch-failure` - Process never successfully launched
+    * `launch-failed` - Process never successfully launched
    * `integrity-failure` - Windows code integrity checks failed

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

 #### Event: 'unresponsive'
@@ -402,6 +403,7 @@ Returns:
  * `key` String - Equivalent to [KeyboardEvent.key][keyboardevent].
  * `code` String - Equivalent to [KeyboardEvent.code][keyboardevent].
  * `isAutoRepeat` Boolean - Equivalent to [KeyboardEvent.repeat][keyboardevent].
+  * `isComposing` Boolean - Equivalent to [KeyboardEvent.isComposing][keyboardevent].
  * `shift` Boolean - Equivalent to [KeyboardEvent.shiftKey][keyboardevent].
  * `control` Boolean - Equivalent to [KeyboardEvent.controlKey][keyboardevent].
  * `alt` Boolean - Equivalent to [KeyboardEvent.altKey][keyboardevent].
@@ -417,7 +419,7 @@ To only prevent the menu shortcuts, use
 ```javascript
 const { BrowserWindow } = require('electron')

-let win = new BrowserWindow({ width: 800, height: 600 })
+const win = new BrowserWindow({ width: 800, height: 600 })

 win.webContents.on('before-input-event', (event, input) => {
  // For example, only enable application menu keyboard shortcuts when
@@ -664,7 +666,7 @@ app.whenReady().then(() => {
  win = new BrowserWindow({ width: 800, height: 600 })
  win.webContents.on('select-bluetooth-device', (event, deviceList, callback) => {
    event.preventDefault()
-    let result = deviceList.find((device) => {
+    const result = deviceList.find((device) => {
      return device.deviceName === 'test'
    })
    if (!result) {
@@ -690,7 +692,7 @@ buffer.
 ```javascript
 const { BrowserWindow } = require('electron')

-let win = new BrowserWindow({ webPreferences: { offscreen: true } })
+const win = new BrowserWindow({ webPreferences: { offscreen: true } })
 win.webContents.on('paint', (event, dirty, image) => {
  // updateBitmap(dirty, image.getBitmap())
 })
@@ -719,7 +721,7 @@ This event can be used to configure `webPreferences` for the `webContents`
 of a `<webview>` before it's loaded, and provides the ability to set settings
 that can't be set via `<webview>` attributes.

-**Note:** The specified `preload` script option will be appear as `preloadURL`
+**Note:** The specified `preload` script option will appear as `preloadURL`
 (not `preload`) in the `webPreferences` object emitted with this event.

 #### Event: 'did-attach-webview'
@@ -737,9 +739,9 @@ Emitted when a `<webview>` has been attached to this web contents.
 Returns:

 * `event` Event
-* `level` Integer
-* `message` String
-* `line` Integer
+* `level` Integer - The log level, from 0 to 3. In order it matches `verbose`, `info`, `warning` and `error`.
+* `message` String - The actual console message
+* `line` Integer - The line number of the source that triggered this console message
 * `sourceId` String

 Emitted when the associated window logs a console message.
@@ -906,11 +908,11 @@ Returns `String` - The URL of the current web page.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({ width: 800, height: 600 })
-win.loadURL('http://github.com')
-
-let currentURL = win.webContents.getURL()
-console.log(currentURL)
+const win = new BrowserWindow({ width: 800, height: 600 })
+win.loadURL('http://github.com').then(() => {
+  const currentURL = win.webContents.getURL()
+  console.log(currentURL)
+})
 ```

 #### `contents.getTitle()`
@@ -997,6 +999,34 @@ Navigates to the specified offset from the "current entry".

 Returns `Boolean` - Whether the renderer process has crashed.

+#### `contents.forcefullyCrashRenderer()`
+
+Forcefully terminates the renderer process that is currently hosting this
+`webContents`. This will cause the `render-process-gone` event to be emitted
+with the `reason=killed || reason=crashed`. Please note that some webContents share renderer
+processes and therefore calling this method may also crash the host process
+for other webContents as well.
+
+Calling `reload()` immediately after calling this
+method will force the reload to occur in a new process. This should be used
+when this process is unstable or unusable, for instance in order to recover
+from the `unresponsive` event.
+
+```js
+contents.on('unresponsive', async () => {
+  const { response } = await dialog.showMessageBox({
+    message: 'App X has become unresponsive',
+    title: 'Do you want to try forcefully reloading the app?',
+    buttons: ['OK', 'Cancel'],
+    cancelId: 1
+  })
+  if (response === 0) {
+    contents.forcefullyCrashRenderer()
+    contents.reload()
+  }
+})
+```
+
 #### `contents.setUserAgent(userAgent)`

 * `userAgent` String
@@ -1254,7 +1284,7 @@ is large then 0.

 #### `contents.incrementCapturerCount([size, stayHidden])`

-* `size` [Size](structures/size.md) (optional) - The perferred size for the capturer.
+* `size` [Size](structures/size.md) (optional) - The preferred size for the capturer.
 * `stayHidden` Boolean (optional) -  Keep the page hidden instead of visible.

 Increase the capturer count by one. The page is considered visible when its browser window is
@@ -1295,9 +1325,9 @@ Returns [`PrinterInfo[]`](structures/printer-info.md)
  * `pagesPerSheet` Number (optional) - The number of pages to print per page sheet.
  * `collate` Boolean (optional) - Whether the web page should be collated.
  * `copies` Number (optional) - The number of copies of the web page to print.
-  * `pageRanges` Record<string, number> (optional) - The page range to print.
-    * `from` Number - the start page.
-    * `to` Number - the end page.
+  * `pageRanges` Object[] (optional) - The page range to print. On macOS, only one range is honored.
+    * `from` Number - Index of the first page to print (0-based).
+    * `to` Number - Index of the last page to print (inclusive) (0-based).
  * `duplexMode` String (optional) - Set the duplex mode of the printed web page. Can be `simplex`, `shortEdge`, or `longEdge`.
  * `dpi` Record<string, number> (optional)
    * `horizontal` Number (optional) - The horizontal dpi.
@@ -1310,6 +1340,8 @@ Returns [`PrinterInfo[]`](structures/printer-info.md)
  * `success` Boolean - Indicates success of the print call.
  * `failureReason` String - Error description called back if the print fails.

+When a custom `pageSize` is passed, Chromium attempts to validate platform specific minimum values for `width_microns` and `height_microns`. Width and height must both be minimum 353 microns but may be higher on some operating systems.
+
 Prints window's web page. When `silent` is set to `true`, Electron will pick
 the system's default printer if `deviceName` is empty and the default settings for printing.

@@ -1318,7 +1350,14 @@ Use `page-break-before: always;` CSS style to force to print to a new page.
 Example usage:

 ```js
-const options = { silent: true, deviceName: 'My-Printer' }
+const options = {
+  silent: true,
+  deviceName: 'My-Printer',
+  pageRanges: [{
+    from: 0,
+    to: 1
+  }]
+}
 win.webContents.print(options, (success, errorType) => {
  if (!success) console.log(errorType)
 })
@@ -1333,13 +1372,12 @@ win.webContents.print(options, (success, errorType) => {
  * `landscape` Boolean (optional) - `true` for landscape, `false` for portrait.
  * `marginsType` Integer (optional) - Specifies the type of margins to use. Uses 0 for
    default margin, 1 for no margin, and 2 for minimum margin.
-    and `width` in microns.
  * `scaleFactor` Number (optional) - The scale factor of the web page. Can range from 0 to 100.
  * `pageRanges` Record<string, number> (optional) - The page range to print.
-    * `from` Number - the first page to print.
-    * `to` Number - the last page to print (inclusive).
+    * `from` Number - Index of the first page to print (0-based).
+    * `to` Number - Index of the last page to print (inclusive) (0-based).
  * `pageSize` String | Size (optional) - Specify page size of the generated PDF. Can be `A3`,
-  `A4`, `A5`, `Legal`, `Letter`, `Tabloid` or an Object containing `height`
+  `A4`, `A5`, `Legal`, `Letter`, `Tabloid` or an Object containing `height` and `width` in microns.
  * `printBackground` Boolean (optional) - Whether to print CSS backgrounds.
  * `printSelectionOnly` Boolean (optional) - Whether to print selection only.

@@ -1370,19 +1408,22 @@ An example of `webContents.printToPDF`:
 ```javascript
 const { BrowserWindow } = require('electron')
 const fs = require('fs')
+const path = require('path')
+const os = require('os')

-let win = new BrowserWindow({ width: 800, height: 600 })
+const win = new BrowserWindow({ width: 800, height: 600 })
 win.loadURL('http://github.com')

 win.webContents.on('did-finish-load', () => {
  // Use default printing options
  win.webContents.printToPDF({}).then(data => {
-    fs.writeFile('/tmp/print.pdf', data, (error) => {
+    const pdfPath = path.join(os.homedir(), 'Desktop', 'temp.pdf')
+    fs.writeFile(pdfPath, data, (error) => {
      if (error) throw error
-      console.log('Write PDF successfully.')
+      console.log(`Wrote PDF successfully to ${pdfPath}`)
    })
  }).catch(error => {
-    console.log(error)
+    console.log(`Failed to write PDF to ${pdfPath}: `, error)
  })
 })
 ```
@@ -1396,7 +1437,7 @@ creation:

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()
 win.webContents.on('devtools-opened', () => {
  win.webContents.addWorkSpace(__dirname)
 })
@@ -1717,7 +1758,7 @@ Returns `Promise<void>` - resolves if the page is saved.

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow()
+const win = new BrowserWindow()

 win.loadURL('https://github.com')

--- a/docs/api/webview-tag.md
+++ b/docs/api/webview-tag.md
@@ -560,9 +560,9 @@ Stops any `findInPage` request for the `webview` with the provided `action`.
  * `pagesPerSheet` Number (optional) - The number of pages to print per page sheet.
  * `collate` Boolean (optional) - Whether the web page should be collated.
  * `copies` Number (optional) - The number of copies of the web page to print.
-  * `pageRanges` Record<string, number> (optional) - The page range to print.
-    * `from` Number - the start page.
-    * `to` Number - the end page.
+  * `pageRanges` Object[] (optional) - The page range to print.
+    * `from` Number - Index of the first page to print (0-based).
+    * `to` Number - Index of the last page to print (inclusive) (0-based).
  * `duplexMode` String (optional) - Set the duplex mode of the printed web page. Can be `simplex`, `shortEdge`, or `longEdge`.
  * `dpi` Record<string, number> (optional)
    * `horizontal` Number (optional) - The horizontal dpi.
@@ -588,8 +588,8 @@ Prints `webview`'s web page. Same as `webContents.print([options])`.
    and `width` in microns.
  * `scaleFactor` Number (optional) - The scale factor of the web page. Can range from 0 to 100.
  * `pageRanges` Record<string, number> (optional) - The page range to print.
-    * `from` Number - the first page to print.
-    * `to` Number - the last page to print (inclusive).
+    * `from` Number - Index of the first page to print (0-based).
+    * `to` Number - Index of the last page to print (inclusive) (0-based).
  * `pageSize` String | Size (optional) - Specify page size of the generated PDF. Can be `A3`,
  `A4`, `A5`, `Legal`, `Letter`, `Tabloid` or an Object containing `height`
  * `printBackground` Boolean (optional) - Whether to print CSS backgrounds.
@@ -755,9 +755,9 @@ Fired when page leaves fullscreen triggered by HTML API.

 Returns:

-* `level` Integer
-* `message` String
-* `line` Integer
+* `level` Integer - The log level, from 0 to 3. In order it matches `verbose`, `info`, `warning` and `error`.
+* `message` String - The actual console message
+* `line` Integer - The line number of the source that triggered this console message
 * `sourceId` String

 Fired when the guest window logs a console message.
@@ -816,7 +816,7 @@ const { shell } = require('electron')
 const webview = document.querySelector('webview')

 webview.addEventListener('new-window', async (e) => {
-  const protocol = require('url').parse(e.url).protocol
+  const protocol = (new URL(e.url)).protocol
  if (protocol === 'http:' || protocol === 'https:') {
    await shell.openExternal(e.url)
  }
--- a/docs/api/window-open.md
+++ b/docs/api/window-open.md
@@ -94,6 +94,6 @@ mainWindow.webContents.on('new-window', (event, url, frameName, disposition, opt

 ```javascript
 // renderer process (mainWindow)
-let modal = window.open('', 'modal')
+const modal = window.open('', 'modal')
 modal.document.write('<h1>Hello</h1>')
 ```
--- a/docs/breaking-changes-ns.md
+++ b/docs/breaking-changes-ns.md
@@ -1,61 +0,0 @@
-# Breaking changes (NetworkService) (Draft)
-
-This document describes changes to Electron APIs after migrating network code
-to NetworkService API.
-
-We don't currently have an estimate of when we will enable `NetworkService` by
-default in Electron, but as Chromium is already removing non-`NetworkService`
-code, we might switch before Electron 10.
-
-The content of this document should be moved to `breaking-changes.md` once we have
-determined when to enable `NetworkService` in Electron.
-
-## Planned Breaking API Changes
-
-### `protocol.unregisterProtocol`
-### `protocol.uninterceptProtocol`
-
-The APIs are now synchronous and the optional callback is no longer needed.
-
-```javascript
-// Deprecated
-protocol.unregisterProtocol(scheme, () => { /* ... */ })
-// Replace with
-protocol.unregisterProtocol(scheme)
-```
-
-### `protocol.registerFileProtocol`
-### `protocol.registerBufferProtocol`
-### `protocol.registerStringProtocol`
-### `protocol.registerHttpProtocol`
-### `protocol.registerStreamProtocol`
-### `protocol.interceptFileProtocol`
-### `protocol.interceptStringProtocol`
-### `protocol.interceptBufferProtocol`
-### `protocol.interceptHttpProtocol`
-### `protocol.interceptStreamProtocol`
-
-The APIs are now synchronous and the optional callback is no longer needed.
-
-```javascript
-// Deprecated
-protocol.registerFileProtocol(scheme, handler, () => { /* ... */ })
-// Replace with
-protocol.registerFileProtocol(scheme, handler)
-```
-
-The registered or intercepted protocol does not have effect on current page
-until navigation happens.
-
-### `protocol.isProtocolHandled`
-
-This API is deprecated and users should use `protocol.isProtocolRegistered`
-and `protocol.isProtocolIntercepted` instead.
-
-```javascript
-// Deprecated
-protocol.isProtocolHandled(scheme).then(() => { /* ... */ })
-// Replace with
-const isRegistered = protocol.isProtocolRegistered(scheme)
-const isIntercepted = protocol.isProtocolIntercepted(scheme)
-```
--- a/docs/breaking-changes.md
+++ b/docs/breaking-changes.md
@@ -14,6 +14,15 @@ This document uses the following convention to categorize breaking changes:

 ## Planned Breaking API Changes (12.0)

+### Default Changed: `contextIsolation` defaults to `true`
+
+In Electron 12, `contextIsolation` will be enabled by default.  To restore
+the previous behavior, `contextIsolation: false` must be specified in WebPreferences.
+
+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.
+
+For more details see: https://github.com/electron/electron/issues/23506
+
 ### Removed: `crashReporter` methods in the renderer process

 The following `crashReporter` methods are no longer available in the renderer
@@ -124,6 +133,54 @@ const w = new BrowserWindow({
 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.
+
+```javascript
+// Deprecated
+protocol.unregisterProtocol(scheme, () => { /* ... */ })
+// Replace with
+protocol.unregisterProtocol(scheme)
+```
+
+### `protocol.registerFileProtocol`
+### `protocol.registerBufferProtocol`
+### `protocol.registerStringProtocol`
+### `protocol.registerHttpProtocol`
+### `protocol.registerStreamProtocol`
+### `protocol.interceptFileProtocol`
+### `protocol.interceptStringProtocol`
+### `protocol.interceptBufferProtocol`
+### `protocol.interceptHttpProtocol`
+### `protocol.interceptStreamProtocol`
+
+The APIs are now synchronous and the optional callback is no longer needed.
+
+```javascript
+// Deprecated
+protocol.registerFileProtocol(scheme, handler, () => { /* ... */ })
+// Replace with
+protocol.registerFileProtocol(scheme, handler)
+```
+
+The registered or intercepted protocol does not have effect on current page
+until navigation happens.
+
+### `protocol.isProtocolHandled`
+
+This API is deprecated and users should use `protocol.isProtocolRegistered`
+and `protocol.isProtocolIntercepted` instead.
+
+```javascript
+// Deprecated
+protocol.isProtocolHandled(scheme).then(() => { /* ... */ })
+// Replace with
+const isRegistered = protocol.isProtocolRegistered(scheme)
+const isIntercepted = protocol.isProtocolIntercepted(scheme)
+```
+
 ## Planned Breaking API Changes (9.0)

 ### Default Changed: Loading non-context-aware native modules in the renderer process is disabled by default
@@ -138,6 +195,45 @@ 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.
@@ -257,7 +353,7 @@ const getGuestForWebContents = (webContentsId, contents) => {
    throw new Error(`Invalid webContentsId: ${webContentsId}`)
  }
  if (guest.hostWebContents !== contents) {
-    throw new Error(`Access denied to webContents`)
+    throw new Error('Access denied to webContents')
  }
  return guest
 }
@@ -313,7 +409,7 @@ powerMonitor.querySystemIdleState(threshold, callback)
 const idleState = powerMonitor.getSystemIdleState(threshold)
 ```

-### API Changed: `powerMonitor.querySystemIdleTime` is now `powerMonitor.getSystemIdleState`
+### API Changed: `powerMonitor.querySystemIdleTime` is now `powerMonitor.getSystemIdleTime`

 ```js
 // Removed in Electron 7.0
@@ -601,11 +697,11 @@ const { memory } = metrics[0] // Deprecated property

 ```js
 // Deprecated
-let optionsA = { webPreferences: { blinkFeatures: '' } }
-let windowA = new BrowserWindow(optionsA)
+const optionsA = { webPreferences: { blinkFeatures: '' } }
+const windowA = new BrowserWindow(optionsA)
 // Replace with
-let optionsB = { webPreferences: { enableBlinkFeatures: '' } }
-let windowB = new BrowserWindow(optionsB)
+const optionsB = { webPreferences: { enableBlinkFeatures: '' } }
+const windowB = new BrowserWindow(optionsB)

 // Deprecated
 window.on('app-command', (e, cmd) => {
@@ -776,11 +872,11 @@ The following list includes the breaking API changes made in Electron 2.0.

 ```js
 // Deprecated
-let optionsA = { titleBarStyle: 'hidden-inset' }
-let windowA = new BrowserWindow(optionsA)
+const optionsA = { titleBarStyle: 'hidden-inset' }
+const windowA = new BrowserWindow(optionsA)
 // Replace with
-let optionsB = { titleBarStyle: 'hiddenInset' }
-let windowB = new BrowserWindow(optionsB)
+const optionsB = { titleBarStyle: 'hiddenInset' }
+const windowB = new BrowserWindow(optionsB)
 ```

 ### `menu`
--- a/docs/development/README.md
+++ b/docs/development/README.md
@@ -23,4 +23,3 @@ For guides on Electron app development, see
 * [Debugging on macOS](debugging-instructions-macos.md)
 * [Setting Up Symbol Server in Debugger](setting-up-symbol-server.md)
 * [Patches](patches.md)
-* [Upgrading Node](upgrading-node.md)
--- a/docs/development/build-instructions-gn.md
+++ b/docs/development/build-instructions-gn.md
@@ -10,6 +10,10 @@ Check the build prerequisites for your platform before proceeding
  * [Linux](build-instructions-linux.md#prerequisites)
  * [Windows](build-instructions-windows.md#prerequisites)

+## Build Tools
+
+[Electron's Build Tools](https://github.com/electron/build-tools) automate much of the setup for compiling Electron from source with different configurations and build targets. If you wish to set up the environment manually, the instructions are listed below.
+
 ## GN prerequisites

 You'll need to install [`depot_tools`][depot-tools], the toolset
@@ -173,12 +177,12 @@ $ 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 :)

--- a/docs/development/pull-requests.md
+++ b/docs/development/pull-requests.md
@@ -233,7 +233,7 @@ Try not to be discouraged. If you feel that a review is unfair, say so or seek
 the input of another project contributor. Often such comments are the result of
 a reviewer having taken insufficient time to review and are not ill-intended.
 Such difficulties can often be resolved with a bit of patience. That said,
-reviewers should be expected to provide helpful feeback.
+reviewers should be expected to provide helpful feedback.

 ### Step 11: Landing

--- a/docs/development/setting-up-symbol-server.md
+++ b/docs/development/setting-up-symbol-server.md
@@ -15,7 +15,7 @@ calls, and other compiler optimizations. The only workaround is to build an
 unoptimized local build.

 The official symbol server URL for Electron is
-https://electron-symbols.githubapp.com.
+https://symbols.electronjs.org.
 You cannot visit this URL directly, you must add it to the symbol path of your
 debugging tool. In the examples below, a local cache directory is used to avoid
 repeatedly fetching the PDB from the server. Replace `c:\code\symbols` with an
@@ -30,7 +30,7 @@ directory on your computer, if you'd prefer a different location for downloaded
 symbols):

 ```powershell
-SRV*c:\code\symbols\*https://electron-symbols.githubapp.com
+SRV*c:\code\symbols\*https://symbols.electronjs.org
 ```

 Set this string as `_NT_SYMBOL_PATH` in the environment, using the Windbg menus,
@@ -38,13 +38,13 @@ or by typing the `.sympath` command. If you would like to get symbols from
 Microsoft's symbol server as well, you should list that first:

 ```powershell
-SRV*c:\code\symbols\*https://msdl.microsoft.com/download/symbols;SRV*c:\code\symbols\*https://electron-symbols.githubapp.com
+SRV*c:\code\symbols\*https://msdl.microsoft.com/download/symbols;SRV*c:\code\symbols\*https://symbols.electronjs.org
 ```

 ## Using the symbol server in Visual Studio

-<img src='https://mdn.mozillademos.org/files/733/symbol-server-vc8express-menu.jpg'>
-<img src='https://mdn.mozillademos.org/files/2497/2005_options.gif'>
+![Tools -> Options](https://mdn.mozillademos.org/files/733/symbol-server-vc8express-menu.jpg)
+![Symbols Settings](https://mdn.mozillademos.org/files/2497/2005_options.gif)

 ## Troubleshooting: Symbols will not load

--- a/docs/development/upgrading-node.md
+++ b/docs/development/upgrading-node.md
@@ -1,121 +0,0 @@
-# Upgrading Node
-
-## Discussion
-
-Chromium and Node.js both depend on V8, and Electron contains
-only a single copy of V8, so it's important to ensure that the
-version of V8 chosen is compatible with the build's version of
-Node.js and Chromium.
-
-Upgrading Node is much easier than upgrading Chromium, so fewer
-conflicts arise if one upgrades Chromium first, then chooses the
-upstream Node release whose version of V8 is closest to the one
-Chromium contains.
-
-Electron has its own [Node fork](https://github.com/electron/node)
-with modifications for the V8 build details mentioned above
-and for exposing API needed by Electron. Once an upstream Node
-release is chosen, it's placed in a branch in Electron's Node fork
-and any Electron Node patches are applied there.
-
-Another factor is that the Node project patches its version of V8.
-As mentioned above, Electron builds everything with a single copy
-of V8, so Node's V8 patches must be ported to that copy.
-
-Once all of Electron's dependencies are building and using the same
-copy of V8, the next step is to fix any Electron code issues caused
-by the Node upgrade.
-
-[FIXME] something about a Node debugger in Atom that we (e.g. deepak)
-use and need to confirm doesn't break with the Node upgrade?
-
-So in short, the primary steps are:
-
-1. Update Electron's Node fork to the desired version
-2. Backport Node's V8 patches to our copy of V8
-3. Update the GN build files, porting changes from node's GYP files
-4. Update Electron's DEPS to use new version of Node
-
-## Updating Electron's Node [fork](https://github.com/electron/node)
-
-1. Ensure that `master` on `electron/node` has updated release tags from `nodejs/node`
-2. Create a branch in https://github.com/electron/node: `electron-node-vX.X.X` where the base that you're branching from is the tag for the desired update
-  - `vX.X.X` Must use a version of Node compatible with our current version of Chromium
-3. Re-apply our commits from the previous version of Node we were using (`vY.Y.Y`) to `v.X.X.X`
-  - Check release tag and select the range of commits we need to re-apply
-  - Cherry-pick commit range:
-    1. Checkout both `vY.Y.Y` & `v.X.X.X`
-    2. `git cherry-pick FIRST_COMMIT_HASH..LAST_COMMIT_HASH`
-  - Resolve merge conflicts in each file encountered, then:
-    1. `git add <conflict-file>`
-    2. `git cherry-pick --continue`
-    3. Repeat until finished
-
-
-## Updating [V8](https://github.com/electron/node/src/V8) Patches
-
-We need to generate a patch file from each patch that Node
-applies to V8.
-
-```sh
-$ cd third_party/electron_node
-$ CURRENT_NODE_VERSION=vX.Y.Z
-# Find the last commit with the message "deps: update V8 to <some version>"
-# This commit corresponds to Node resetting V8 to its pristine upstream
-# state at the stated version.
-$ LAST_V8_UPDATE="$(git log --grep='^deps: update V8' --format='%H' -1 deps/v8)"
-# This creates a patch file containing all changes in deps/v8 from
-# $LAST_V8_UPDATE up to the current Node version, formatted in a way that
-# it will apply cleanly to the V8 repository (i.e. with `deps/v8`
-# stripped off the path and excluding the v8/gypfiles directory, which
-# isn't present in V8.
-$ git format-patch \
-    --relative=deps/v8 \
-    $LAST_V8_UPDATE..$CURRENT_NODE_VERSION \
-    deps/v8 \
-    ':(exclude)deps/v8/gypfiles' \
-    --stdout \
-    > ../../electron/common/patches/v8/node_v8_patches.patch
-```
-
-This list of patches will probably include one that claims to
-make the V8 API backwards-compatible with a previous version of
-V8. Unfortunately, those patches almost always change the V8 API
-in a way that is incompatible with Chromium.
-
-It's usually easier to update Node to work without the
-compatibility patch than to update Chromium to work with the
-compatibility patch, so it's recommended to revert the
-compatibility patch and fix any errors that arise when compiling
-Node.
-
-## Update Electron's `DEPS` file
-
-Update the `DEPS` file in the root of
-[electron/electron](https://github.com/electron/electron) to
-point to the git hash of the updated Node.
-
-## Notes
-
- Node maintains its own fork of V8
-  - They backport a small amount of things as needed
-  - Documentation in Node about how [they work with V8](https://nodejs.org/api/v8.html)
- We update code such that we only use one copy of V8 across all of Electron
-  - E.g Electron, Chromium, and Node.js
- We don’t track upstream closely due to logistics:
-   - Upstream uses multiple repos and so merging into a single repo
-   would result in lost history. So we only update when we’re planning
-   a Node version bump in Electron.
- Chromium is large and time-consuming to update, so we typically
-  choose the Node version based on which of its releases has a version
-  of V8 that’s closest to the version in Chromium that we’re using.
-  - We sometimes have to wait for the next periodic Node release
-   because it will sync more closely with the version of V8 in the new Chromium
- - Electron keeps all its patches in the repo because it’s simpler than
-   maintaining different repos for patches for each upstream project.
-   - Crashpad, Node.js, Chromium, Skia etc. patches are all kept in the same place
- - Building Node:
-   - We maintain our own GN build files for Node.js to make it easier to ensure
-     that eevrything is built with the same compiler flags.
-     This means that every time we upgrade Node.js we have to do a modest amount of
-     work to synchronize the GN files with the upstream GYP files.
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -43,26 +43,14 @@ use HTML5 APIs which are already available in browsers. Good candidates are
 [Storage API][storage], [`localStorage`][local-storage],
 [`sessionStorage`][session-storage], and [IndexedDB][indexed-db].

-Or you can use the IPC system, which is specific to Electron, to store objects
-in the main process as a global variable, and then to access them from the
-renderers through the `remote` property of `electron` module:
-
-```javascript
-// In the main process.
-global.sharedObject = {
-  someProperty: 'default value'
-}
-```
-
-```javascript
-// In page 1.
-require('electron').remote.getGlobal('sharedObject').someProperty = 'new value'
-```
-
-```javascript
-// In page 2.
-console.log(require('electron').remote.getGlobal('sharedObject').someProperty)
-```
+Alternatively, you can use the IPC primitives that are provided by Electron. To
+share data between the main and renderer processes, you can use the
+[`ipcMain`](api/ipc-main.md) and [`ipcRenderer`](api/ipc-renderer.md) modules.
+To communicate directly between web pages, you can send a
+[`MessagePort`][message-port] from one to the other, possibly via the main process
+using [`ipcRenderer.postMessage()`](api/ipc-renderer.md#ipcrendererpostmessagechannel-message-transfer).
+Subsequent communication over message ports is direct and does not detour through
+the main process.

 ## My app's tray disappeared after a few minutes.

@@ -107,7 +95,7 @@ To solve this, you can turn off node integration in Electron:
 ```javascript
 // In the main process.
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({
+const win = new BrowserWindow({
  webPreferences: {
    nodeIntegration: false
  }
@@ -155,7 +143,7 @@ To achieve this goal, set the background in the constructor for [BrowserWindow][

 ```javascript
 const { BrowserWindow } = require('electron')
-let win = new BrowserWindow({
+const win = new BrowserWindow({
  backgroundColor: '#fff'
 })
 ```
@@ -171,5 +159,6 @@ Notice that just setting the background in the CSS does not have the desired eff
 [local-storage]: https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
 [session-storage]: https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage
 [indexed-db]: https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API
+[message-port]: https://developer.mozilla.org/en-US/docs/Web/API/MessagePort
 [browser-window]: api/browser-window.md
 [subpixel rendering example]: images/subpixel-rendering-screenshot.gif
--- a/docs/fiddles/features/drag-and-drop/index.html
+++ b/docs/fiddles/features/drag-and-drop/index.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Hello World!</title>
+    <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline';" />
+</head>
+<body>
+    <h1>Hello World!</h1>
+    <p>
+        We are using node <script>document.write(process.versions.node)</script>,
+        Chrome <script>document.write(process.versions.chrome)</script>,
+        and Electron <script>document.write(process.versions.electron)</script>.
+    </p>
+    <a href="#" id="drag">Drag me</a>
+    <script src="renderer.js"></script>
+</body>
+</html>
--- a/docs/fiddles/features/drag-and-drop/main.js
+++ b/docs/fiddles/features/drag-and-drop/main.js
@@ -0,0 +1,41 @@
+const { app, BrowserWindow, ipcMain, nativeImage, NativeImage } = require('electron')
+const fs = require('fs');
+const http = require('http');
+
+function createWindow () {
+  const win = new BrowserWindow({
+    width: 800,
+    height: 600,
+    webPreferences: {
+      nodeIntegration: true
+    }
+  })
+
+  win.loadFile('index.html')
+}
+const iconName = 'iconForDragAndDrop.png';
+const icon = fs.createWriteStream(`${process.cwd()}/${iconName}`);
+http.get('http://img.icons8.com/ios/452/drag-and-drop.png', (response) => {
+  response.pipe(icon);
+});
+
+app.whenReady().then(createWindow)
+
+ipcMain.on('ondragstart', (event, filePath) => {
+  event.sender.startDrag({
+    file: filePath,
+    icon: `${process.cwd()}/${iconName}`
+  })
+})
+
+app.on('window-all-closed', () => {
+  if (process.platform !== 'darwin') {
+    app.quit()
+  }
+})
+
+app.on('activate', () => {
+  if (BrowserWindow.getAllWindows().length === 0) {
+    createWindow()
+  }
+})
--- a/docs/fiddles/features/drag-and-drop/renderer.js
+++ b/docs/fiddles/features/drag-and-drop/renderer.js
@@ -0,0 +1,9 @@
+const { ipcRenderer } = require('electron')
+const fs = require('fs')
+
+document.getElementById('drag').ondragstart = (event) => {
+  const fileName = 'drag-and-drop.md'
+  fs.writeFileSync(fileName, '# Test drag and drop');
+  event.preventDefault()
+  ipcRenderer.send('ondragstart', process.cwd() + `/${fileName}`)
+}
--- a/docs/fiddles/features/keyboard-shortcuts/global/index.html
+++ b/docs/fiddles/features/keyboard-shortcuts/global/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Hello World!</title>
+    <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline';" />
+</head>
+<body>
+    <h1>Hello World!</h1>
+    <p>
+        We are using node <script>document.write(process.versions.node)</script>,
+        Chrome <script>document.write(process.versions.chrome)</script>,
+        and Electron <script>document.write(process.versions.electron)</script>.
+    </p>
+</body>
+</html>
--- a/docs/fiddles/features/keyboard-shortcuts/global/main.js
+++ b/docs/fiddles/features/keyboard-shortcuts/global/main.js
@@ -0,0 +1,31 @@
+const { app, BrowserWindow, globalShortcut } = require('electron')
+
+function createWindow () {
+  const win = new BrowserWindow({
+    width: 800,
+    height: 600,
+    webPreferences: {
+      nodeIntegration: true
+    }
+  })
+
+  win.loadFile('index.html')
+}
+
+app.whenReady().then(() => {
+  globalShortcut.register('Alt+CommandOrControl+I', () => {
+    console.log('Electron loves global shortcuts!')
+  })
+}).then(createWindow)
+
+app.on('window-all-closed', () => {
+  if (process.platform !== 'darwin') {
+    app.quit()
+  }
+})
+
+app.on('activate', () => {
+  if (BrowserWindow.getAllWindows().length === 0) {
+    createWindow()
+  }
+})
--- a/docs/fiddles/features/keyboard-shortcuts/interception-from-main/index.html
+++ b/docs/fiddles/features/keyboard-shortcuts/interception-from-main/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Hello World!</title>
+    <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline';" />
+</head>
+<body>
+    <h1>Hello World!</h1>
+    We are using node <script>document.write(process.versions.node)</script>,
+    Chrome <script>document.write(process.versions.chrome)</script>,
+    and Electron <script>document.write(process.versions.electron)</script>.
+</body>
+</html>
--- a/docs/fiddles/features/keyboard-shortcuts/interception-from-main/main.js
+++ b/docs/fiddles/features/keyboard-shortcuts/interception-from-main/main.js
@@ -0,0 +1,13 @@
+const { app, BrowserWindow } = require('electron')
+
+app.whenReady().then(() => {
+  const win = new BrowserWindow({ width: 800, height: 600, webPreferences: { nodeIntegration: true } })
+
+  win.loadFile('index.html')
+  win.webContents.on('before-input-event', (event, input) => {
+    if (input.control && input.key.toLowerCase() === 'i') {
+      console.log('Pressed Control+I')
+      event.preventDefault()
+    }
+  })
+})
--- a/docs/fiddles/features/keyboard-shortcuts/local/index.html
+++ b/docs/fiddles/features/keyboard-shortcuts/local/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Hello World!</title>
+    <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline';" />
+</head>
+<body>
+    <h1>Hello World!</h1>
+    <p>
+        We are using node <script>document.write(process.versions.node)</script>,
+        Chrome <script>document.write(process.versions.chrome)</script>,
+        and Electron <script>document.write(process.versions.electron)</script>.
+    </p>
+</body>
+</html>
--- a/Show More
+++ b/Show More