У вашего броузера проблема в совместимости с HTML5
This is a comparison between the new DirectX 11 and the somewhat older DirectX 9. The benchmark that was run is the Heaven Benchmark v1.0 by Unigine Corp.
As you might notice the DirectX 11 part has framedrops at some points. This is simply because my single HD 5850 couldn't handle the processing of graphics and the filming using FRAPS at the same time.
Settings used:
API: DirectX 11/ DirectX 9
Shaders: High
Tessellation: Enabled/ Disabled
Anisotropy: 16
Anti-aliasing: 4x
Resolution: Custom, 640x720