QTP 10/11 is currently supporting IE-8 and FF3.6. IE-9 and FF4 , are justĀ released and i guess it should take probably couple of weeks/months to extend support the new version of browsers of i.e.
QTP11 supports IE9 with below patch.
http://h20230.www2.hp.com/selfsolve/document/FID/D
I hope this will give you a clear picture….