Wardrobe, one of the best parts of Firefox is that it's not as closely knitted to Windows as IE is. So, naturally you don't have to worry about problems with IE.

IE is obsolete to me. They only do any real updates to it maybe once or twice a year. Firefox gets updates much more often. Meaning, increasingly better stability and many more features. I've been using Mozilla/Firefox for well over a year and I have had no problems or complaints when compared to IE.