Originally Posted by Gusar
That page uses a fixed background. This makes it a Firefox issue, nothing to do with the nvidia driver. Search forums.mozillazine.org, the Firefox Builds section, you'll find plenty of discussion about it.
But no problems on Windows and no problems on Linux with GF7950 and:
/usr/bin/nvidia-settings -a InitialPixmapPlacement=0 -a GlyphCache=1