Mozilla foundation released Firefox 3 release candidate 1 today and is available for download. If you are a Firefox 3 beta user or never tried firefox 3 this is the time now to test the new version of the browser. Remember this is release candidate so ther might be bugs in it so download if you are sure what you are doing. Some of the extensions you use in firefox may not work with this version.
Firefox 3 has some great improvements over firefox 2 in terms of security and performance improvements and a new bookmarking system.
check out the full features here, Mozilla links has a great review on Firefox 3 release candidate if you are interested.