There aint no 1 perfect browser.. however there are some that provide better features..
for example, IE doesnt hog memory
while Firefox rapes it..
I havnt done too much testin on Opera to comment, so i wont bother incase some fans get offended heh
However IE allows spyware/virus and all that jazz in very easily, and your pretty much open to everything..
Firefox seems to do better at blocking and protecting your computer
Firefox is easy, good looking, simple, and its tabbed feature works wonders
IE is messy and to be honest, doesnt look all that good.. (i know IE7 has tabs, but that dont work too well either, i've played around w/ it and its no use)
IE is used more wordwide, therefore like someone said before, if a page is shown differently on Firefox and on IE, then most likey the IE one is the one that is seen most..
Im done for now.. ILL BE back
w/ some cheese and this little fella to rule the world