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
1 069
4
211
3
81
2
79
1
418
Icegger-it Aseqdac Firefox 15172535
sɣur Aseqdac Firefox 15172535, 6 jierren lyn
Great addon.
info.title is undefined: I bet youtube made some changes today, since this isn't the only affected dowloader. Just wait an update.