Mozilla has released Firefox 3.5 RC2. Currently this new RC version is being distributed to all Mozilla mirror websites before that it would be available for general public. So, the users who are working with RC1 can directly update to RC2 just from inside the Firefox web browser by clicking on automatic update or Firefox RC2 could be downloaded directly from Mozilla website.
Release notes for RC2 is not released yet, so the changes of Firefox RC2 are not conformed. Although Mozilla did not announced Firefox 3.5 RC2 at the moment officially but hopefully it’ll be revealed soon.

So, if you want to Firefox 3.5 RC2 before official release then download from MajorGeeks.