Until this version "1 Password" has been supported. I miss not being able to use it now.
Go to Solution.
And now a final (non-test) version of 1Password is available for Firefox 6:
Extension for f6 available for testing : http://forum.agilebits.com/index.php?/topic/5166-firefox-5-supported-in-1password-also-beta-extensio...
For anyone who doesn't like the new style 1Password extension, you can get an old-style one that's still compatible with Firefox 6 here: