Whenever I go to watch a html5-video firefox crashes, before any video appears. Whether it's on youtube or somewhere else. I have tried to refresh firefox, I have even tried to completely remove my profile and use a completely fresh one. I have tried to remove the mozilla folder in .cache. These are some of my crash reports: bp-a6cca4f9-9911-4861-8652-a9b3c2150727 2015-07-27 18:35 bp-5a993273-4086-462a-917d-38b2b2150727 2015-07-27 18:22 bp-95bddcc7-531c-46de-850b-ca04e2150727 2015-07-27 18:10 bp-e6a1df1f-255e-4b4b-aeb6-b83392150727 2015-07-27 17:53 It works fine if I try to play videos in another browser, like Chromium.