The legacy FireFox/54 style one just worked and that was so awesome! This one has some realy good things and a few weird bits of tinkering now.
I came to the addon review page to find out why Mp3 and Opus were missing options. Has a ton of potential, more fidgety and qurky now.

Question for the author. Is their a reason FFMG is now seperate? I simply don't know why it's a seperate thing now.