The add-on was last updated two years ago. Apparently the dev is no longer interested in developing and updating it. No wonder it works incorrectly, or not at all.

It fixes another big mistake from Alphabet in their continuous efforts to destroy Google. Thank you for developing it and allowing us to chose for ourselves!
Please include a link for donations in the description or something!!!

works perfectly. fall asleep, wake up 7 hours later, youtube still playing videos.

Generally it works as it should, but Youtube no longer automatically switches to HD. An update is urgently needed here.

stopped working recently

As far as I can tell it works, but unfortunately, it also makes me unable to pause any video without refreshing the window. So I'm going to have to say this is not what I'm looking for, as that trade-off is not worth it.

This extension does what I have been looking for. Thank you developers.

This addon is working on Firefox of mine now(Feb-2023).
On some version of Firefox, You must maybe settings(Option or "about:config").
After add this Extension, YouTube Videos became not pause. Thanks!

it needs to be updated it stopped working recently