To use these add-ons, you'll need to download Firefox.

Qqen
Tignit n uzegrir

Iceggiren i YouTube Video and Audio Downloader (WebEx)

YouTube Video and Audio Downloader (WebEx) sɣur feller

3,8 n yitran ɣef 5
5
1 071
4
211
3
82
2
80
1
412
Icegger-it Maverynthia
sɣur Maverynthia, pred 6 rokmi
No documentation on how to set it up and get FFMPEG working. The support site is just a GitHub page with nothing on it but some files, not even a release.