[isaacwaller]

I'm having the exact same issue on Firefox / Windows 8.1 on an Intel Iris 5100, so it's probably an issue with Intel drivers.

[MattJ100]

Also Intel here (on Linux). I guess you may be right.

[bd]

I tried to boot with my Intel HD 3000 enabled (secondary GPU in my Thinkpad) and while it was very slow, demo did work.

I'm on Windows 7. Weird it doesn't work on newer GPUs and newer OS, regresses do happen sometimes.

It does work for me elsewhere, on my Nvidia Quadro 2000M and oldie ATI Radeon HD3650, Chrome and Firefox, with DX9 ANGLE, DX11 ANGLE and OpenGL rendering backends.