So I upgraded from firefox version 3.16 to version 4.0.1. When I downloaded and installed firefox 4.0.1 I launched it and when it popped open the interface looked exactly like version 3.16, the bookmarks (the bookmarks that are above the tabs) would not work, i.e. i clicked on them and they would'nt open, and when i opened options and clicked to display tab bar...there was no tab bar, but instead tab groups? My question is how do I get firefox 4.0.1 because it's obviously not upgrading for me? Also, when i tried restarting firefox with the ad ons disabled, it closed firefox and prompted me whether or not i wanted to open firefox in safe mode. When i opened in safe mode firefox 4.0.1 was there! Does my problem have anything to do with my ad ons or test pilot? Thanks in advance!