I see the same problem in Opera too, except it's even worse (the animation lags, and it hogs a whole CPU core). Explorer is better than Firefox and Opera, but

I see the same problem in Opera too, except it's even worse (the animation lags, and it hogs a whole CPU core). Explorer is better than Firefox and Opera, but still pretty high CPU usage. The only browser of the ones I tested that it seems to be relatively fine in is Chrome.