06-21-2010, 11:49 AM
Not sure if QTP 10 fully supports Firefox 3.6, but if you can dowgrade it to 3.5, you will have to install a patch realeased by HP-
http://support.openview.hp.com/selfsolve...PWEB_00046 (requires login)
http://support.openview.hp.com/selfsolve...PWEB_00046 (requires login)