I was just discussing this yesterday, about the Firefox 3 RC1 given on the Mozilla FTP. And look, here we have the RC1 announced by Mozilla team today. Wondering what’s new? Check out the release notes for this.
Many fixes and improvements have been made to improve security, and performance. Including fixes for stability and web-compatibility. One major change that you will all notice is the change in the user-interface. Looks like Mozilla heard my shout! “I want a better default theme!” :P