WebGL stops rendering(?)

Hey everyone, I’ve been interested in WebGL and now trying to learn it, but I’ve encountered a problem and after searching for it can’t find any similar problems, so here I am.
When I try any WebGL example:
[ul]In Chrome it usually works for about 20-30secs and then it just freezes, I know it stops rendering or something alike, it keeps running but doesn’t display anything (still hear sound, reconigzes input). If I close the tab and create create a new one the WebGL will run, but don’t display anything right from the start. Another thing to note, the WebGL only stops rendering when Chrome is in the foreground.[/ul]

[ul]In FF, it either works or it doesn’t, by work I mean run, just no display (hear sound, etc…)[/ul]

Restarting the browser sometimes works, sometimes it doesn’t.

Running Windows 7 64bit on an Asus N61JV
Both FF and Chrome are set to use dedicated graphics card (GeForce GT325M)
OpenGL v3.3