The final version will hit the internet in the coming week (maybe the 18th). Not many serious bugs fix, but the main one is that the fully automated update system is now running quite nicely thank you.
What is the fully automated update system, it's quite neat in that when there is a patch update, mostly a security update, instead of having to download and install the full download, you only have to download a 200Kb to 500Kb download. The patch update is applied either straight away, (your choose) or you can delay it till you have finished doing what your doing, close the browser, and that's it, when you reload Firefox, the patch update will be installed for you. easy.
One word of warning though if you are using Firefox now, and are also use the extension Adblock, This does not work well at all with Firefox RC2 . I suggest that you get
Adblock Plus.
Have fun

Click on Image to get the Release candidate.