CCleaner

What's new in this version:

Stack Upgrades:
- Chromium 91.0.4472.69
- v91 blog post
- v90 blog post
- Node v14.17.0
- v14.17.0 release notes
- V8 v9.1
- v9.1 blog post
- v9.0 blog post

Breaking Changes:
- Fixed so window.open() parameter frameName is no longer set as window title
- Changed session.setPermissionCheckHandler(handler) to allow for handler's first parameter, webContents to be null

Features:
Additions:
- Added process.contextId used by @electron/remote
- Added process.contextIsolated property that indicates whether the current renderer context has contextIsolation enabled
- Added process.uptime() to sandboxed renderers
- Added roundedCorners option for BrowserWindow
- Added missing fields to the parameters emitted as part of the context-menu event
- Added new session.storagePath API to get the path on disk for session-specific data
- Added support for passing DOM elements over the context bridge
- Added support for registering Manifest V3 extension service workers.
- Added 'registration-completed' event to ServiceWorkers
- Added disposition, referrer and postBody to the details object passed to the window open handler registered with setWindowOpenHandler

Improvements:
- Additional permission checks are now routed through session.setPermissionCheckHandler. These include Notification.permission, and permission.query. Please note that the webContents parameter to the check handler can now be null
- Allowed skipping process type transformation in win.SetVisibleOnAllWorkspaces on macOS
- Reverted WebFrameMain.executeJavaScriptInIsolatedWorld()
- Made trafficLightPosition option work for customButtonOnHover window
- The submitURL option for crashReporter.start is no longer a required argument when uploadToServer is false
- Improved performance of napi_threadsafe_function

Removed/Deprecated
- Removed deprecated BrowserWindow extension APIs
- Removed deprecated shell.moveItemToTrash()
- Removed deprecated systemPreferences methods

Fixed:
- Fixed hiddenInset titleBarStyle's abnormal fullscreen titlebar. Fix hiddenInset titleBarStyle not working with trafficLightPosition option
- Fixed a use-after-free bug during shutdown when using off-the-record sessions
- Fixed an issue where contextBridge might incorrectly try to serialize some WebAssembly objects
- Fixed behavior of 302/303/307 redirect responses in the protocol module
- Made BrowserWindow.setWindowButtonVisibility work for window with customButtonsOnHover titlebar style
- Fixed a rare crash on boot
- Fixed permissions issue that was preventing the PDF viewer from displaying
- Fixed the possibility for incorrect visual artifacts when using vibrancy and making frameless windows fullscreen on macOS
- Fixed using vibrancy with titleBarStyle together resulting in weird window shadow on macOS
- Restored cross-platform noop implementation of app.setAppUserModelId
- Security: backported fix for chromium:1196683

Other Changes:
- Non-functional change; updates repository's issue template file
- Updated community discussions link in default Electron menu