To add to Raw's comments, Firefox---unlike IE---is not attached to your operating system which makes it more secure. I prefer the Mozilla suite, since it has both the browser (with slightly more features) and an Email Client that is better than OExpress.
Firefox has tabbed browsing, a very nice feature once you get used to it, a download manager, and a cookie manager.There are many plug-ins, called extensions, that are small programs for specialised use, so you can tailor your browser to just those functions you need (for example, a calendar, or a one-click view page in IE) Most people notice a marked difference in surfing speed when using FF.
Converting is easy with FF; once you download it, there are easy wizards that allow you to import your bookmarks, etc.
I should warn you, though, that you will need to download JavaRuntimeEnvironment at some point, and that SOME web sites that are not compliant with published standards or rely on MS proprietary versions, may not work or work properly with IE. MS Update only works with IE, for example.
PS---scan this forum, there are several threads here discussing FF.
Edited by jgweed, 09 January 2005 - 10:54 AM.