Can't speak for Android, but for iOS Firefox has an app which does all the proper hooking into system autofill to be able to fill your passwords browsers/apps.

Can't speak for Android, but for iOS Firefox has an app which does all the proper hooking into system autofill to be able to fill your passwords browsers/apps. (There's an Android app, too. I'm just not familiar with Android's affordances for that sort of thing so I can't really comment on how it works.) https://www.mozilla.org/en-US/firefox/lockwise/ https://www.mozilla.org/en-US/firefox/lockwise/