Yesterday, Mozilla team signed off the first Firefox 4 beta RC build and it is supposed to be the final version of RC as said by the development team. Mike Beltzner, Mozilla’s Director of Firefox, says that this release candidate represents the code we intend to ship as Firefox 4. However, this RC version doesn’t have significant changes between the beta 12 and Release Candidate.
A lot of bug fixes were done and the final stable versions of plug-in are up for the release. This RC build is currently available for download from the release FTP server and is also available from Firefox Beta website.