WonTube Free YouTube to MP3/MP4/FLV | Firefox addon for YouTube download | Scoop.it

Download any video from YouTube as high quality MP4, FLV or MP3. A free YouTube Downloader and a YouTube to MP3 Converter just above any YouTube Video clip.

https://addons.mozilla.org/en-US/firefox/addon/wontube-free-youtube-to-mp3/?src=search