It works, but practically only for 720p video. Does the job if you really want a downloader browser extension, but it's really limiting otherwise. I'm not bothered that mp3 is limited to a paid feature, it's easy enough to convert video files to audio only. What does bother me is the lack of 1080p or higher downloads.
Their excuse about needing "powerful server infrastructure" for 1080p+ downloads is a weird one, considering this is all done locally. You could convert to mp3 locally as well, but that's whatever.

All in all, it works. But you're better off just using software that lets you download as you please.

Wouldve kept but need to pay to download mp3

This is great for downloading videos, but the MP3 functionality has been broken by a change in the way YT handles the audio ... since 2018, five years ago. Developer should remove that feature as upgrading it would be unwielding.

Shame I can't save just the audio as an mp3 in standard definition and not high but works otherwise like it says it does.
Oh, also, it doesn't work on age-restricted videos? I can watch them because I'm not on an age restricted account or anything but I there is no download button.

You have to buy the Pro version for downloading Mp3,3GP and 1080p but I was able to download 360p with the basic add-on so it did partly meet my need.

dissapairs after a single video

Video works, mp3 doesn't.

Fine but also does not support uhd and 4k

I can't download mp3 without PRO version.

Still doesn't show download button for some youtube videos if this can be fixed I would give 5 stars.

Scusa non ho affato aposto quello abuso

This is not working suddenly for Firefox 78.15.0 on Linux. Thanks for quick update

This is not working suddenly for Firefox 93

I am not giving this three stars because I don't like it. I actually LOVE this add-on.

I'm giving it three stars because my download button disappeared, and even though I downloaded the newest version, the button is still missing. I haven't been able to download anything for a week because none of the other youtube downloaders are as easy to use and I can't figure them out. I really miss this add-on. I'm hoping the creator sees this and can do something about the missing button, because there's no way to get in touch directly.