QUOTE(Agent F @ Nov 29 2007 at 06:04 AM)

IE has it's fair share of useful addons even for web developers. And since most people don't use No Script, it isn't fair to compare them that way.
Internet Explorer is a disaster when you're looking for inter-compatibility. Not as bad as Safari, but still pretty bad, as Microsoft just HAD to use their own JS API..
Anyways, I highly recommend Firefox 2, I've been amazed by it, and still am. It's so much better than IE.
Besides, it can never hurt to try!

To answer your question; to the general user, Firefox is a lot more secure. But when you're careful with what you download, open, run, etc. there's not a lot of difference.