javascript - Canvas glitches when hardware acceleration is on -

i'm desperate.

i have debug @ work canvas animation glitches when hardware acceleration activated on firefox running on windows.

i've searched on internet , have no idea how can fix this.

that understood hardware (gpu) acceleration used when rendering outside visible window. can confirm ?

here example of glitch, images piling instead of translating :

http://i.stack.imgur.com/t2qcb.png http://i.stack.imgur.com/sj39t.png