Well, using it for licensing is of course harder to argue for than increasing the user's security. May I ask what were the specific problems in your scenario? I

Well, using it for licensing is of course harder to argue for than increasing the user's security. May I ask what were the specific problems in your scenario? I'm guessing users with multiple browsers? That's another reason why I hate Windows not having a central MS provided keyring. If MS had pushed for it soon after the POSIX community and Apple, passwordless authentification might be already a standard nowadays.