I have limited experience with firefox. I am used to IE and seem to always end up using it. I really don't see much of a difference between the two. I have two different work at home jobs that each require use of one or the other, so I have both on my computer and actually use both. I have also noticed that if a page doesn't want to open in one of the browsers it will often open in the other. For example, a chat room that I frequent (work related) sometimes will not open in IE, but if I open FF it will generally open right away.