I use Firefox exclusively. The program loads faster than Internet Explorer, it's more secure than Internet Explorer (very important), and the plugins are great. I have a complete weather forecast (with satellite imagery and severe weather emergency alerts), Adblock Plus with all the add-ons, DownloadHelper (for downloading flash videos), Open PDF, RefreshEvery (automatica refreshes the selected page in intervals of your choice), IE Tab (allows you to run websites using the IE engine within Firefox [for those few sites that are more compatible with IE], and a few other miscellaneous plugins.
It's 100% customizable and tweakable (using "about:config" in the address bar [without quotes, only should be used if you know what you're doing]). I highly recommend those that haven't tried it yet to give it a shot. :bigthumbup: