Which broswer is best for running Unity?

So...I currently use the new Firefox 4.0 So far it's been pretty primitive and hangs A LOT. The old Firefox could run Unity games such as Dead Frontier, smoothly without much lag. But now, Firefox lags so much while using Unity that I have to kill the whole entire browser in order to get on with my life. Unity also seems to crash much more often on Firefox... I started using Firefox b/c everyone said Unity was perfect for it, and it was until the 4.0 major update.

So now I'm hunting for a new browser, any suggestions?