According to StatCounter The Top three browsers this year are IE8, Mozilla Firefox 3.5 and IE 7.0
According to Stats IE 8.0 stands in first place around the world with 23%
Firefox 3.5 stands in second place with 19.95% over world
and finally IE 7.0 stands in third place with19.24%
So, IE doing well these days, But Firefox 3.6 is picking up with around 5%
Even Many Users except US are still using the updated browser IE 6.0.
http://gs.statcounter.com/#browser_version-ww-monthly-201001-201003-bar