Umm, Mozilla works if you" disable the download manager because it sometimes has problems downloading large files"
Then change skins, and reconfiure a few more things.
and Opera "has annoying ads"
However properly configured IE with add-ons has no ads or pop-ups, can be just as fast and secure as either of those, and is able to see all of the 87%+ pages thats are written specificlly for the IE standard (something neither of the others can do 100% of the time.)