Chrome
Ab Version: 66.0: OS: Windows, Mac
Ab Version: 65.0; OS: Android, iOS
Firefox
Ab Version: 60.0: OS: Windows, Mac
Ab Version: 60.0???; OS: Android, iOS
Opera
Ab Version: 53.0: OS: Windows, Mac
Ab Version: 53.0???; OS: Android, iOS
Safari
Ab Version: 10.0: OS: Mac
Ab Version: 10???.0; OS: iOS