That's pretty biased. I can assure you there are a *lot* of us MSFT developers who use IE regularly, and there are times when it's FF that has the bugs and can be a real pain to have work right.
Regardless - in the end it has to work right on at least IE8/9, FF3.6, FF4, and Chrome. I'm open to help on this - it's been a loong time since I had to do cross-browser work.