I just downloaded Firefox 3.5 on both of my computers and am very happy with it. It does feel significantly faster than the previous version but didn’t blow me away quite like Safari 4 did.
When I upgraded only two of my six current extensions were compatible. So, even if you are anxious to get your hands on the latest version make sure your essential extensions are compatible with 3.5 before upgrading.
Update 6/30/09: Mozilla has already over one million downloads of Firefox. Mozilla has also launched a real time Firefox download tracker so users can watch as downloads occur.