The latest stable build of Firefox -- version 9, for those not up to speed with Mozilla's rapid-fire release schedule -- is readily awaiting your download (Windows | Mac | Linux). The update comes just over a month after the release of Firefox 8 and the first beta of Firefox 9. Despite the relatively brief development cycle, Mozilla has crammed plenty of changes into December's revision.
Given Mozilla's hasty development cycle, Firefox 10 and 11 are already available in alpha forms and we wouldn't be surprised if the former reached beta before the end of 2011. We don't see anything particularly exciting about the next stable build, but it should fix an annoying bug that causes the back and forward buttons to stop working when visiting Google+. WebGL gains anti-aliasing and the forward button will be hidden until you navigate back. More details here.