On Firefox 20 on Windows on my 2500k with a 7970 it seems CPU bound and can only achieve 43fps benchmark at 1920x1200, while having some clear artifacts from lack/too little texture anisotropy on the floor and antialiasing issues.
Also, the textures are not fully detailed when looking directly at the floor and walls.
If this is supposed to be a full quality benchmark (ala Unigine Heaven when it came out), it needs to improve.