With the screen off, it stops after some time, I think it is when the video has to re-load.

Does what it promises

Perfect..this was originally a built-in feature in Firefox but the bloodsuckers at Google blocked it to force us to buy YouTube red even when it's not available in most of the world .

Works properly on Android Nougat 7.0!
Very useful for YouTube playlists in background while you're doing other things on your phone!

Es fantástica, funciona a la perfección con Firefox para Android.
Justo lo que buscaba desde hace meses. Ya no es necesaria una suscripción a YouTube Red :3

Very useful: I can finally listen youtube videos and playlists with the screen locked!

Works great for individual videos. When playing a playlist with the screen off, it always pauses 20 seconds after it moves to the next video. Once you turn the screen back on it continues.

Thanks.

This extension is one of the main reasons why Firefox is better than others

Thank you very much for this addon, Firefox! Now I can listen to lectures on my phone, without the need to keep the screen on and drain my battery. YAY!