Firefox -- Why You Should Download It

So, the latest version of Firefox is out (Version 1.5) I use Firefox as my primary browser, and hardly ever use Internet Explorer anymore. Why should you?
It has tabbed browsing (so instead of switching from window to window, you can just click a tab at the top of your browser to switch to another web-page session)
It's very fast, and can be customized with lots of different extensions that will enhance it, much more so than Internet Explorer.
It's less prone to viruses than Internet Explorer is and is really easy to configure.