<img src="http://i.imgur.com/t8NzS81.png" border="0" />
my.opera.com/chooseopera/blog/2013/05/28/the-next-version-of-opera-available-now
Since it uses chromium it runs C2 games pretty well.
Develop games in your browser. Powerful, performant & highly capable.
Nice! It scores 86% on ScirraMark. It's got WebGL, the Web Audio API, and even the GamePad API. It's missing WebRTC and the Fullscreen API, but since they are supported by Chrome hopefully they're coming soon.