BackPlay от Zigrun

BackPlay allows you to play YouTube videos in the background using Firefox.
Plus, it saves screen and battery resources, reduces energy consumption, slows down global warming, and helps save the penguins. Yes, every background video is a small step toward a better Antarctica! 🐧🌍💚

We don’t collect your data. Honestly, we wouldn’t even know where to send it — and our server is just a bowl of spaghetti and two meatballs.
R'amen.