Firefox 4, and it's made good on that promise. We got word this morning that the final version of Firefox 5 is now available for download on Mozilla's ftp server, just 12 weeks after the last re-up. The latest incarnation brings with it support for CSS animation and a more easily accessible do-not-track setting -- now available at the top of the privacy pane -- but won't see much in the way of GUI enhancements. Of course, if you want to play it safe, and avoid any last-minute tweaks, you can always hold off until version 5 gets official, but what's the fun in that? If you've already got your hands on the sly fox, let us know your thoughts in the comments below.