Rp Tutorials

My LJLogin stopped working randomly. I decided to go ahead and upgrade my Firefox (finally) and without even noticing what version it was... I now have FF7. Lo and behold, LJLogin isn't compatible and now I'm stuck logging in and out. Does anyone have a fix for this or how I can use it? Or should I downgrade to FF4? (And how exactly would one go about doing so?)

Thanks in advance!