1. Extremely slow to start - ok, I could live with that...
2. Can't render some pages that work perfectly fine inside IE and Chrome - not really something to be proud of, but can be worked out with IE plugin..
3. Has problems with Silverlight - NOT OK....
There is no free lunch is high point again...
So, I can forecast this future: Firefox (in which I'm writing even now) is going to drop popularity over time... IE, Chrome & Safari are going to rule the bunch...
Open source community usually forgets that programmers have to eat, and we all know that only fat programmers are good ones, from movies of course...
All that combined into single conclusion equals commercial work will prevail...
P.S.
When you have famous height="100%" issue in firefox regarding Silverlight object, check this site:
Firefox and the 100% DIV revisited
