I still use IE. I've tried Firefox a few times and the main hurdle I've had to be able to use it is that I can't get the address bar background color to be white. I know it's a dumb reason to not switch but I'm very stubborn about things like that. I've grown accustomed to IE's appearance and outside of the address bar, I was able to make Firefox look enough like IE so that it was useable, but the address bar (and text box at Google, among other things) drove me crazy. If anyone knows how to fix that and can help me out, I'd give Firefox another try and maybe stick with it this time.
Edit: I dunno if I'll read this thread again... If you know and want to help me out, please PM me. Thanks.