Internet Explorer is for people who don't understand that IE is complete fail and doesn't support half of what's out there for web standards... no joke...
Scroll to the bottom:
http://a.deveria.com/caniuse/
Also Chrome is the fastest browser with the fastest JS engine on the planet...
Chrome wins on all fronts.
FailFox has the slowest JS engine and all the JS effects are jumpy... They ARE however, reworking their entire JS engine to be based off of webkit/chrome's ... and I do love me some FireBug