Good one

It's a great extension overall but lacks importing from other 2FA apps such as FreeOTP. This requires you to manually copy/paste or type your secret to the extension. It's okay if we have 2 or 3 services that we use 2FA to login but what if we have more? That's why I rate it one star less. However, gotta say it, this extension is still the best you can get and it's best at what it does.

Funkar

Please also activate the mobile version of Firefox

Works well and has a simple layout that is extremely functional rather than theoretically elegant.

Perfect TOTP client for people who don't like mobile authenticator apps. It automatically backs up your auth entries, offers export/import and password protection.

Einfach COOL