You cannot automatically log in to accounts.firefox.com/signin. You need to copy the account name and password separately.
It's also unfortunate that many websites prevent Bitwarden from working (by redirecting the account and password input screen).

After LastPass went corporate and severely limited their free account options, I searched for months for a new service. Password management services are, admittedly, fairly cheap in general, and it wasn't anything against LastPass that made me leave. I simply couldn't afford anything but a free account at the time.

After trying many alternatives I stumbled upon Bitwarden, and steeled myself for yet another disappointment, only to find a refreshing, comprehensive and secure service I could rely on, even for free until I could afford a higher account level.

I highly recommend Bitwarden—the desktop client and/or the browser integration are outstanding, as is the mobile app (and companion authenticator app). Thank you, Bitwarden!

Great service from BitWarden, keep up the good work!

Finally updated and just works.

log on instructions not clear as to result expexted.

最强密码管理器

was good at the beginning but once i got really scared because it was not possible to log in at all. was a wake-up call for me. better use KeePassXC has tons of features and best of all - your passwords are in your hand, not on someone else's PC. you can use Syncthing as well to maintain regular backups and make it available on several devices. never looked back since then.