I ran this in FF4 on my 2009 Unibody MBP. No other programs open, no significant background processes, with the dedicated graphics card active. Choppiness throu

I ran this in FF4 on my 2009 Unibody MBP. No other programs open, no significant background processes, with the dedicated graphics card active. Choppiness throughout, including some pretty bad stalls. Wouldn't work in the Webkit nightly (Safari) or Chrome. At least, I don't think it would. There were no UI elements to show loading progress or any errors, so I gave up after a bit of waiting. Oh, it did throw an error on my iPad. Two of them, in fact.