Windows opened from links inside a sandboxed iframe now inherit the iframe's sandbox restrictions unless allow-popups-to-escape-sandbox is set. #52190(Also in 43)
Fixed ProtocolResponse.url requests being made through the default session instead of the session the protocol handler was registered on when ProtocolResponse.session was not set. #52132(Also in 40, 41, 43)
Made "reload" menu items work with BaseWindow. #52117(Also in 41, 43)