Hi galaxyfan1992, The URL you posted does not seem to go to any video, but I did notice that you have quite a few add-ons installed. One or more of them may be causing the problem. If you close Firefox, then start Firefox in Safe Mode, does the problem still occur? To start in Safe Mode, go to '''Help > Restart with Add-ons Disabled'''. If the problem does not occur in Safe Mode, then you can disable your extensions one-by-one until you find out which one is causing the problem. For more info, visit [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]].