Picture-in-Picture feature of Firefox 72 is something really useful. Tip for @gnome users, right click on the popup player and select 'Always on Top'. This will keep the player on top of all the applications.
https://support.mozilla.org/en-US/kb/about-picture-picture-firefox
Video from the screenshot: https://youtu.be/bho5P0TSNTI
@bhavin192
If you picture in picture something, it means you don't really care. So why not just background it? It's over engineering.
@gnome