In the last couple weeks i've encountered an issue where video footage, but not the audio or the video progress itself, will freeze if I tab out of Firefox and into a game window. [https://www.youtube.com/watch?v=G-5ET68w0Vk Here's a video showing the issue] Like shown in the video, It only seems to affect Firefox and not other browsers, and it only happens when I switch to a game window, not other tabs. It should also be noted that although the video only shows YouTube footage, this issue affects every player I've tested it on. I've tried this both with and without extensions enabled, as well as just about every video player related config in the about:config page, and with both hardware acceleration on and off, still with no luck resolving the problem. If anyone has had a similar issue and managed to fix it, help doing so for myself would be much appreciated.