Try it and see what you think. I like the tab feature which allows you to open links to other pages in the background while you continue reading the current page. Also the ability to set your home page as several differnt pages so they all open when you start Firefox.
Try Googling Internet Explorer v Firefox. There's just no competition. Also try searching for Firefox on here. There've been loads of topical posts. Firefox (for the moment) is simply superior. There are masses of extensions to enable you to make Firefox suit your personal needs. Adblock, Signature, Tabbrowser Preferences, Foxy Music and StumbleUpon are in themselves enough to encourage me to choose it!! It's quicker, more secure and, if you want it, has a good choice of skins. At the moment, no competition. The next edition of IE might not agree though.