i choose… Firefox v3.0.5 (i been pretty much using Firefox exclusively since a little prior to v1.0 and it’s highly unlikely i would ever switch back to IE unless something drastic happens )
cause of the ‘TabScroller’ extension and ‘NoScript’ and ‘AdBlock Plus’ extensions… at the very least i would say ‘Adblock plus’ is a ‘must have’ extension for Firefox as it tends to block out a pretty good percentage of popup’s etc etc.
once setup correctly… TabScroller makes it so you can hold down right mouse button and scroll with mouse wheel to instantly switch between tabs… once your used to it… it’s more efficient than manually clicking on tabs.
but basically if you generally dont have many tabs open then TabScroller probably wont be of any real benefit for you.
for me, Firefox is just a overall more efficient browsing experience than Internet Explorer in general is.
plus from general tests you see online Firefox is more memory efficient than IE7 is.