I even used FireFox 2 to download Vista 32bit.
I have been able to use it in vista with no issues.
I still find it faster than IE, however, ie 7 is getting much better.
Have you guys tried Avant?? It's also a really good browser. It's able to browse sites specifically designed for IE6 or 7. It's only drawback is
that you can't open it more than once at the same time. I usually have numerous firefox windows open at the same time. One for ATS and the other
ones for other sites.