I am using Windows 98SE in a virtual machine, and I was wondering what version of Firefox would be fastest (2, 3, 3.5, 3.6, 3.7, 4)? I'm using KernelEx, so any would work. The main problem is that the higher up you go, the faster the browser gets, but the more modern (and therefore, most memory and CPU intensive). Which would be the best version?