FirefoxFirefox, add the 'plugins' faster, safer, supreme font size controls, BBcode, HTML and XHTML tools are great!!!
IE is still needed for MS UpDate, some online virus scans and when you want Dell to tell you "Current Configuration of your system.
Hotmail works great in Firefox but Excite Mail needs IE and then Spybot S&D to remove what they add.
Forefox does a lot of updating, have 1.0.6 Lockheed said 1.5? there is now a 1.0.7 up.