fire fox 3

[Fisher]

if any boby want firefox 1 or 1.5 i have copies of them. jpm me your email addys and ill send them to you. i cant remember the extact verions but i have three going back along way

 

[Kage]

They upgraded for a reason though.
I doubt security holes could be filled with the previous versions.

As for how much memory it uses, it does use alot. Firefox takes a while to boot the first time I run it into RAM.

I've hardly have it crash on me though... but even if it does, it tends to be able to recover what you were looking at no problem.