WebGL exercises some new corners of the OpenGL interface that many drivers weren't prepared for when WebGL arrived, so browsers tend to have an extensive blacklist: if you have a driver on the list, you won't get WebGL.
On a rolling release like Debian Testing, with well-supported hardware like the Intel Ivy Bridge integrated GPU, WebGL has always worked beautifully.
On a rolling release like Debian Testing, with well-supported hardware like the Intel Ivy Bridge integrated GPU, WebGL has always worked beautifully.