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

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Iceggiren i YouTube Video and Audio Downloader (WebEx)

YouTube Video and Audio Downloader (WebEx) sɣur feller

3,8 n yitran ɣef 5
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Icegger-it Aseqdac Firefox 15519056
sɣur Aseqdac Firefox 15519056, prije 5 godina
Finally, one that works on youtube... and seems to be fully free.