Rated 5 out of 5 stars

per Firefox user 381fd5 el mai. 17, 2018 · enllaç permanent

Realy loved this module it was the best.
Hope the devs didn't abandoned the project for the new version of Firefox !

In the meantime i can suggest you an app on android for downloading youtube audio and vidéos called NewPipe (you will need F-droid store to find it)
Happy downloading guys