Back on Windows, I was able to play/pause youtube videos within firefox using the media buttons on my keyboard. On Linux I am really missing this ability.
Is there any way I can send MPRIS commands to Firefox on Linux (gnome)? It doesn't have to work everywhere, youtube alone would be cool enough. I'm using Firefox 56.0.2.
I came across this but the install instructions are only for chrome and I can't get the firefox script to work as I'm not aware of how to create/get an extension/ID from the code on github.
Another answer here suggests the use of hotkeys, this is a nice idea but I would like to control youtube while Firefox is in the background too, so keyboard-shortcuts are out of the question.
All the solutions here are either outdated or for Chrome only.