Comment # 9 on bug 967938 from Mircea Kitsune

This took a while, but it seems I've finally found the bizarre cause: The
problem apparently happens only when watching 1080p and / or 60FPS videos. It
stopped occurring after I disabled webm support in my browser, and now watch
videos through mp4 instead. In Firefox, you must go in about:config and disable
media.mediasource.webm.enabled.

Does anyone know why this might be? Is there a vulnerability in the kernel or
the free video drivers, which allows webm to cause kernel panics?