Mozilla has put up the first release candidate of Firefox 4 as promised. Even though the promise was of the 12th beta being the last, the transition over the last few months has been fast-paced and it would be time for skeptics to shed off their doubts of whether Firefox will be able to deliver a version 7 by the end of 2011, as planned in the roadmap. A brand new decisive release system already tells us how Firefox is hellbent on reaching this goal.
A complete list of new features in this RC is outlined at this page. Out of these changes , the remarkable ones are design UI, organizing tabs, managing add-ons and better a syncing UI. Behind the scene changes include better HTML5 support and better WebM support.
To download the Firefox 4 RC installer sized at 12.6 MB, go to this page and follow the link.
The download provided above was for the beta 12 of Firefox 4 and not the RC release as written on the download page at Mozilla. The RC release is not publicly out yet, but you can catch the untested version here (English version). Keep an eye on this page for updates on the RC release.