Thank you very much! This is the best I used)

The extension description claims that it is:

«A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.1»

Yet the only available option is a terrible MP4 360p (!)
All other options are paid unless the video has already been downloaded by another (paying) user.

This information should be in the disclaimer of the extension.

Very easy to use, so much betterthan others I've tried before

Another tool in my grab-bag of YouTube video downloading tools. This add-on works well on a lot of videos. Sometimes the MP3 feature does not work, and sometimes certain video qualities are not able to download, but what I have discovered with YouTube is there is no free tool that downloads everything perfectly. That's why I have multiple different add-ons. This one is a great tool in the bag. Pro-tip: You can always convert a video you've downloaded into an MP3 easily with several different free programs that you can find online.

good job.

DONT BOTHER! CANT DOWNLOAD ANYTHING USEFUL WITHOUT PAYING - SCAM!!

Misleading. You have to pay for this extension to work even for 720p