One of the goals of WebGL was always to enable the functionality on both desktop and mobile devices. This is one of the reasons why OpenGL ES 2.0 was chosen as a starting point for the capabilities exposed by the spec.
We’ve had support for WebGL in Firefox desktop nightlies for a few weeks now, but soon I hope to have it enabled on Firefox for mobile devices (code name Fennec) as well. Jay demonstrated some simple demos working on Nokia’s N900 at the ARM techcon3 today a few weeks ago (took a while to get the video done!), and I’ve grabbed a quick video showing things in action.
This should be showing up in Firefox for mobile devices nightly builds, so we’ll see some more interesting things running on phones soon!