Release Notes for 9.0.0

Stack Upgrades

Changed the default value of app.allowRendererProcessReuse to true. This will prevent loading of non-context-aware native modules in renderer processes. (See #18397 for more information on this change.) #22401
Removed deprecated <webview>.getWebContents(). #20986
Removed the deprecated 'setLayoutZoomLevelLimits' method. #21383
IPC between main and renderer processes now uses the Structured Clone Algorithm. #20214
Split shell.openItem(path) into synchronous and asynchronous methods. #20682

Added fullScreen property support for BrowserWindows. #23330
Added session.listWordsInSpellCheckerDictionary API to list custom words in the dictionary. #22128
Added session.removeWordFromSpellCheckerDictionary API to remove custom words in the dictionary. #22368
Added session.serviceWorkerContext API to access basic service worker info and receive console logs from service workers. #22313
Added a new force parameter to app.focus() on macOS to allow apps to forcefully take focus. #23447
Added chrome.i18n extension API. #22570
Added chrome.tabs.connect extension API for background pages. #22549
Added support for property access to some getter/setter pairs on BrowserWindow. #23208
Added support for the chrome.extension.getBackgroundPage API when building with enable_electron_extensions. #22177
Allow an optional callback parameter for WebFrame.executeJavaScript* methods, which is called synchronously unless the target context is paused. #22501
Restored support for pdfium-based PDF viewer. #22131

Don't allow window to go behind menu bar on mac. #22828
Fixed webRequest module not working with file:// protocol. #22919
Fixed webRequest not working for CORS requests. #22468
Fixed win.setMenuBarVisibility(false) not hiding menu bar. #23263
Fixed an issue where changing theme on macOS would break window maximizability state. #22724
Fixed crash in network service process when using protocol.registerSchemeAsPrivileged api. #22917
Fixed crash that could occur when calling session.fromPartition inside the ready event. #23472
Fixed incorrect hit testing on top of ::after element with layoutNG. #23190
Fixed missing debug symbols for crashpad handler on macOS. #23573
Fixed possible freeze on window with disabled background throttling. #22852
Fixed the print button functionality in the PDF viewer extension. #23173
Limited manipulation of custom spellchecker dictionary words to persistent sessions. #22683
Removed extraneous crashpad_handler binary from the Linux distribution files. #23575
crashReporter is now explicitly initialized only in the main process, and implicitly initialized in other child processes. This fixes an issue preventing the crash reporter from functioning in sandboxed renderers on Linux. #23461
Fixed broken Views API builds. #22642