Will "Sign in With Apple" ever be supported with Firefox on macOS?
This was recently added to Safari 13: https://developer.apple.com/documentation/safari_release_notes/safari_13_release_notes
Mehr Details zum System
- User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Firefox/68.0
your problem is not clear, but I think this link will be helpful https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac
This is referring to the "Sign In With Apple" feature in iOS 13 / Safari 13: https://www.imore.com/how-sign-apple-works-ios-13-ipados-13-and-macos-catalina
I doubt if Mozilla will ever institute a feature for that directly within Firefox. Mozilla already has a similar service called Firefox Accounts. But it might be possible for an add-on developer to add that "Sign in With Apple" feature to Firefox.