It's long past time to bother telling anyone how much better than IE Firefox is. Faster, smaller, more responsive, with tabbed browsing and useful extensions galore. It's also lot more secure than IE, partly because it's open source, and particularly because it's not integrated with the underlying OS.
Firefox's security bugs involve the browser only, and can be fixed quickly and without much fuss. On the other hand, because of its integration with the OS, IE's bugs can involve the system overall, and may need weeks or months to sort out. Read the whole review at TheReg