Bug Fixes

• Fixed a crash when launching with the --debug or --debug-brk
  command line flags. #9436
• Fixed several issues with the electron.d.ts TypeScript definition file.
• Popup windows and <webview> tags are now supported by the offscreen
  rendering option. #8839
• Fixed an issue where service worker scripts would not load when using
  protocol.interceptBufferProtocol. #9360

API Changes

• Added support for using Chrome's default window.open implementation
  via the nativeWindowOpen option to the BrowserWindow constructor. #8963
• Added a will-prevent-unload event to webContents that can be used to
  prevent a page from preventing the unload of a page. #9331
• Added support for specifying the maximum disk space used by the cache
  via the --disk-cache-size Chrome option. #9435
• Added a webContents.getOSProcessId() API to get the operating system
  pid for a renderer process. #9222