I've began to notice that HTML5 media causes strange issues with my graphics drivers. Watching HTML5 videos on YouTube or browsing the Ingress Intel page causes Firefox to lock up after a period of a few minutes, though I can still hear audio and use keybindings, I'm not able to move my mouse onto the desktop that Firefox is currently on (I use two monitors). I'm forced to reboot my PC to resolve the error. This appears in the event viewer when the issue occurs. "The description for Event ID 14 from source nvlddmkm cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. If the event originated on another computer, the display information had to be saved with the event. The following information was included with the event: \Device\Video5 !06d7(2640)" I've tried resetting Firefox, reinstalling video drivers, etc. It only happens with HTML5, not Flash.