Excellent add-on! Rated 5 out of 5 stars
Beats all the Youtube audio extractors I've used until now. It doesn't link to a third party site as many others do and performs the conversion to mp3 from within the application itself.
I also like the Scissors utility which allows you to edit where the audio is extracted from. Anyone who has listened to Moby - "Mistake" will know that the video runs for 14 seconds without any audio before the track begins. The Scissors utility allows you to cut that blank part out altogether which is great!