A new version of Firefox is out. This time around it is V12.0. If you've lost track, that means were now at version 12.0, and the biggest addition this time around is reserved for Windows users -- they'll now get silent updates that bypass the User Account Control prompt. Apart from that, you'll now get line numbers when you view a page's source code, along with a number of other more minor fixes and performance improvements.
Check out the source below for more info.