Release Notes for v40.8.1

Fixes

• Added validation to protocol client methods to reject protocol names that do not conform to the RFC 3986 URI scheme grammar. #50158 ^{(Also in 38, 39, 41)}
• Fixed an issue on macOS where calling autoUpdater.quitAndInstall() could fail if checkForUpdates() was called again after an update was already downloaded. #50216 ^{(Also in 39, 41)}
• Fixed an issue where Chrome Devtools menus may not appear in certain embedded windows. #50138 ^{(Also in 39, 41)}
• Fixed an issue where additionalData passed to app.requestSingleInstanceLock on Windows could be truncated or fail to deserialize in the primary instance's second-instance event. #50162 ^{(Also in 38, 39, 41)}
• Fixed an issue where screen.getCursorScreenPoint() crashed on Wayland when it was called before a BrowserWindow had been created. #50104 ^{(Also in 39, 41)}
• Fixed an issue where calling setBounds on a WebContentsView could trigger redundant page-favicon-updated events even when the favicon had not changed. #50084 ^{(Also in 39, 41)}
• Fixed an issue where invalid characters in custom protocol or webRequest response header values were not rejected. #50131 ^{(Also in 38, 39, 41)}
• Fixed an issue where permission and device-chooser handlers received the top-level page origin instead of the requesting subframe's origin. #50149 ^{(Also in 38, 39, 41)}
• Fixed an issue where traffic light buttons would flash at position (0,0) when restoring a window with a custom trafficLightPosition from minimization on macOS. #50207 ^{(Also in 39, 41)}
• Fixed bug where opening a message box immediately upon closing a child window may cause the parent window to freeze on Windows. #50189 ^{(Also in 39, 41)}
• Reverted AltGr key fix that caused menu bar to no longer show on Windows. #50110 ^{(Also in 39, 41)}

Other Changes

• Backported fix for chromium:485622239. #50168