Does anyone know about the addon to firefox that creates a button which lets me select saved usernames for current website and after selecting one it fills the login form?
I was using it but after reinstall of my computer I can't find it. Thanks.
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The one that I'm aware of and use constantly is LastPass.
It is able to maintain multiple logins per domain, you can also link domains to use the same login.
It is also able to do form fills with multiple profiles, 2-factor authentication at lots more.