Comment 313 for bug 125970

My brother's got 1GiB of VRAM on Vista and he still has this problem at roughly the same level that I have with 256MiB on Linux.

However, I have noticed that Firefox is a lot more sensitive than other browsers to the optimizations for composited desktops on Linux. Konqueror, Opera, and friends work like a charm no matter how video is configured. Firefox's normal operation was sluggish enough to drive me nuts (as its normal state of being) until I finally combined Firefox 3, KWin 4.x compositing, and the tweaks to the nVidia drivers to make compositing work acceptably fast.