I tried to submit something through the feedback thing, but as far as I can tell, things written there go nowhere, so who knows.
No, we read pretty much all the feedback (through filtered and clustered searches) -- the volume is very high, and so we can't respond to individual comments, though.
We are aware of the issue with hardware acceleration on certain setups. Try updating your graphics card drivers and try again?
-- Alexander Limi, Firefox User Experience Team