Maybe, if you have a slow CPU but relatively better GPU, and prefer to trace on Firefox, you can speed up 3D rendering speed (cell flythroughs and cube rotations) by simply resizing the window.
This seems to be a Firefox bug, hardware acceleration might be disabled until window resize.
I got a x10 speed increase from ~2 fps, and earn more points this way 
you might also have some luck with these instructions…Â
 To force-enable Layers Acceleration, go to about:config and set layers.acceleration.force-enabled=true.
On Windows Vista and Windows 7, to force-enable Direct2D Content Acceleration, go to about:config and set gfx.direct2d.force-enabled=true.