When I open YouTube or tik tok in my Firefox browser and play a video, I want the video to stop playing as soon as I close the Firefox app. But when I open my running apps and swipe up to close Firefox, the videos keep playing every time. There is a a media controller for Firefox in my notifications that does not disappear and remains active after I close my Firefox app, I don't want that either; I want those specific things to stop as soon as I close my Firefox app. I do not want my browser to play a video after I have attempted to close the browser to stop the video.

I can't find any settings on the Firefox app about background playback. The only article I found on Mozilla about this feature cheerfully reports that videos will play in the background when you "minimize" the app, and it does not give any direction for how to opt out of this feature by changing the settings. Can someone help me figure this out ?.