This is one sweet firefox extension, definitely one of the best I use regularly, good looking and rarely gives you any hassle.

???

Like other top-rated addons in this genre, you cannot download YouTube videos in an MP3 format without paying money.

It is NOT free for all downloads.

Installed.
Tried to download some video as mp3.
YOU MUST BE A PRO USER.
Uninstalled.

I have been using this add-on for awhile and if I run into questions, the creator has always responded to my questions. Glad to have this one!
5/21 update - this developer has always been on top of all youtube changes and quickly resolves issues. Still a 5 star!

Great little extension. Please donate, people, if you use it. I did.

It's works.

teleio

it's good, But sometimes it doesn't work

Works very well, I mainly download short movies and the occasional live music event. quality of downloads is excellent, and play perfectly in VLC.

Works mostly very very well. Very useful extension. Excellent support. Have been using for about 1 1/2 years. Thank you!

o

Thanks a lot.. very nice and helpful.

seems to work good so far

Extension très utile qui m'a rendu de nombreux services, elle me convient parfaitement, merci !