Firefox is a great browser that can enhance your online experience. I've been using Firefox since about version 0.8. I'm normally the kind of person that goes around and tries out new bits and pieces. Most things I download don't last very long. Firefox is different. Whilst Mozilla is a bit clunky, Firefox is sleek, not full of junk and a pleasure to use.
You will find Firefox is compatible with most sites, although you may occasionaly have to load up IE. There is also no Google sanctified Page Rank tool for Firefox... Google search is nicely integrated into Firefox though.
Firefox has many advantages over IE.
Googles, "I'm feeling lucky" is built into the Firefox browser bar. You can just start type some words into the browser and quite often you will end up where you want to go... not today... right now.
Find out for yourself how nifty Firefox is. Download Firefox using the banners here. Don't be afraid if it is a release version, in my usage of the product, it is more reliable than IE. It is only about 4.5 meg and once you start using it, you will most likely love it.