I've been using this add-on for several years. It is kept pretty well up to date and works very well. Happy to donate to support the effort it takes to maintain this excellent tool.

Update 2021.
As usual This is a great app, and as usual, the problem, now sorted was caused by google. No surprise there though.
Without a doubt Easy Video Downloader Express is the best Youtube downloader, without exception. Since having the pro version, the only hiccup was caused by Firefox and it's continual making alterations. Make sure the one you choose has EXPRESS, the other one doesn't work. Read their infomation, to find out more

Completely Useless. Save your time.

membantu sekali

downloading mp3 works only for pro (paid) users. Unninstalled.

Doesn't work for 1080p on most videos.

nice

by Kimi

for singing

I downloaded this mainly to download mp3, however I keep getting a message saying that option is no longer available. It works well to download videos and is easy to use

Nice, sensible interface. Very convenient and reliable.

The Pro version works well.