Hey everybody, I have found a browser with wich one you can play HTML5 games without performance laggs, loss of control (I had this on Google Chrome when using WASD movement), problems when right-clciking (Opera...) and all this other annoying problems like when you can't play offline without C2.
It's called "Aurora" and it's some kind of Firefox "alpha". You can find it by searching "Firefox Beta" in Google.
Here's a link (it's german because I couldn't change this): mozilla.org/de/firefox/channel