flash is slow in gnome 3: maybe need to disable effects.

Hi guys! I’m running gnome 3 on a packard bell dot s2 netbook. I had gnome 2 and lxde before and firefox rendered an acceptably good flash video quality with the desktop effects disabled. The problem seems to be that now, with gnome 3 and its tight integration with clutter, effects are not allowed to be disabled and the framerate of flash videos is really slow. At least, I think this is the cause.
Do u know any way to disable gnome 3 effects or making flash quality better?

Thanks in advance!