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Just installed Nightly to test this out. It doesn't work. Just sits there blinking "Seeing how much your system can handle..." with no growing cloth in the background.

Opened up FireBug; the console had the following error at line 18 of renderer.js:

> NS_ERROR_FAILURE: Failure > this.gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl')

EDIT: It doesn't work in FF 20.0.1 either... Win 7

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That means your browser doesn't have WebGL available. If you're on Nightly, that probably means your GPU is blacklisted. Type about:support into your address bar to see details.

How come it doesn't return null here? I display an alert if WebGL isn't available.

You can get an exception from any canvas or WebGL API in cases where a driver is misbehaving (or, worst case, you have hit a browser bug).

You gotta wrap that stuff in try/catch (at least the getContext call, as a minimum). I don't think this is spec compliant, but I've seen it in Firefox, Chrome and Opera under various configurations.

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