You now have to activate any flash / java content on IE, so you can use that content, do you all like that too?
Firefox does not have that problem, plus: the tabbing is more efficient with superT extension. There are more extensions that make your life easier like: mouse gestures, real time weather on your status bar, webdeveloper bar (for web developers is excelent), color picker, the download I feel to be better, you can even have a session saver so you get your browser in the same state you left it when you restart your computer.
Firefox Rulz, so I'm for Firefox.