Well if Firefox workss the way it is supposed to then the damage won't be nearly as bad as if it were on Internet Explorer because Firefox isn't as close to Windows as Firefox is but that is still very intresting. I my self use Firefox and I think that there is much of a diffrence between it and IE.
I use FF too. And I find it is quite good as a browser. My IE get more and more broken with time and I can not repair or reinstall it. Some time ago my IE stoped to show JS correctly. Now it refuses to show letters on Flash movies. I wander what is the next :) And FF works fine till now.