Firefox is dandy. I use it 99% of the time. The problem is that not everything works on Firefox. There are still places, like Bestbuy.com’s rewardzone area that need ie to function properly. I tried to open my reward certificates with firefox and the print function doesn’t work with FF. I called customer service and was informed of this along with a mention that they have the same problem with Mac’s. So IE stays on the computer, because occasionally I get the must use IE error.