It isn't. Help > About Mozilla Firefox shows that it's the official release. Also, like http://mozilla.com http://mozilla.com is still showing Firefox 2, the w

It isn't. Help > About Mozilla Firefox shows that it's the official release. Also, like http://mozilla.com http://mozilla.com is still showing Firefox 2, the welcome page http://en-us.www.mozilla.com/en-US/firefox/3.0/whatsnew/ http://en-us.www.mozilla.com/en-US/firefox/3.0/whatsnew/ hasn't been updated yet to reflect the new version. Mozilla also explained that the RC3 is exactly the same as the final release, anyway. If you have either RC2 or RC3, there's no need to update.