Firefox (64-bit)

What's new in this version:

Breaking Changes:
- Removed the skip-taskbar feature on Linux
- Renderers are now sandboxed by default unless nodeIntegration: true or sandbox: false is specified
- Added safeguards when building native modules with nan. Use node-gyp >=8.4.0 and electron-rebuild >=3.2.9 for when rebuilding native modules

Features:
Additions:
- Added a warning for building native modules with node-gyp and electron-rebuild, asking users to upgrade to >=8.4.0 for node-gyp and >=3.2.8 for electron-rebuild if using Electron 20 or higher
- Added app.isHidden() to check if the app is hidden (e.g. with Command-H) on macOS
- Added browserData to app.setPath/getPath
- Added immersive dark mode on Windows
- Added support for HIDDevice.forget()
- Added support for panel-like behavior. Window can float over full-screened apps
- Enabled systemPreferences.subscribe{Local|Workspace}Notification to take a null value for the event parameter
- Fixed an issue where the PDF Viewer would fail if a user attempted to reload

Fixed:
- Fixed 20.0.0-beta.8 X11 crash regression
- Fixed _dyld_missing_symbol_abort crash on macOS when using c++ native modules
- Fixed serial-port-added and serial-port-removed events not firing
- Fixed a potential printing hang
- Fixed an issue where invalid print job settings would correctly call back Invalid print settings as the failure reason, but would then not terminate the print job, leading to an eventual crash on exit
- Fixed an issue with fullscreen transitions when HTML fullscreen is requested
- Fixed child about:blank windows from inheriting their parents' preload scripts when sandbox: false and nodeIntegrationInSubFrames: true
- Fixed initialization race when registering partition allocator on macOS
- Fixed native module compilation issues on arm
- Fixed spontaneous crashing in native modules that depended on nan
- Updated Windows Control Overlay buttons to look and feel more native on Windows 11

Other Changes:
- Added a TRACE call named crash_reporter::Start under the electron category for crash_reporter::Start()
- Added deprecation warning for the new-window event
- Added minimum GITHUB_TOKEN permissions
- Fixed an issue where BrowserViews didn't always visually update after call to setBounds
- Fixed child_process.spawn ENOENT error with cwd option
- Minimum required node version to install the electron npm package is now >10
- On Linux, changed the libgdk-pixbuf dependency to be dynamically linked rather than statically linked
- Re-enabled symbol generation on 32-bit Windows
- Temporarily disabled symbol generation on 32-bit Windows due to issues with symbol generation on that platform
- WebContents for <webview> are now only created after the 'will-attach-webview' event is emitted and preventDefault is not called