Going back to Firefox 3.0.12

The firefox web site doesn't show any of the 3.0.yadda-yadda versions. I just downloaded 3.0.12 from here. Works good, much better than 3.5.1. The 3.5.xx versions do have a faster render engine, it can paint the screen faster. But it has some kinda bug about opening new websites which cripples it so badly that the 3.0.xx version gives a better browsing experience.