The winner is...

Firefox 2 still rules the browser roost for now, despite a much improved version of Internet Explorer. The most obvious new feature for IE 7 (tabs) has been in Firefox forever, and the security additions from Microsoft aren't enough for us to allay concerns over new possible exploits. Lastly, the extensibility of Firefox 2 is its knockout punch, and IE's add-ons cannot compare. The flexibility and customizability of Firefox might be best suited to more advanced Web users, but it has earned its spot at the top of the browsers.