You might be getting the software rendering webgl implementation if there are GPU driver problems (https://blog.chromium.org/2016/06/universal-rendering-with-sw

You might be getting the software rendering webgl implementation if there are GPU driver problems (https://blog.chromium.org/2016/06/universal-rendering-with-swiftshader.html https://blog.chromium.org/2016/06/universal-rendering-with-s...). (Of course in principle you don't need hardware acceleration to make this kind of thing run fast...)