Started to add it to FF, and a message popped up "Requires permission to:
*access data for all web sites, and
*download files and read and modify the browser's download history"
So, I discontinued the add on, I am not allowing this

Not free for HD content anymore so I'll have to find another add-on.

Hay que pagar para descargar en mp3 :(

doesn't work

This guy doesn't tell you that you have to pay to download 1080 until you actually try. Dishonest!

not sure why this is a featured addon. I guess Mozilla doesn't try out the addons themselves anymore.

First off, any lower resolution video download link results in 403 Forbidden page. Downloading the MP# results in a prompt to upgrade to PRO version. In short, The only feature of this addon - download videos from youtube - does not work at all for any resolution for either video nor audio.

Moved to a subscription service... it is not free

This was a great add-on and still works brilliantly for 720p MP4 or less quality. But they recently changed it so that unless you're willing to pay for the PRO version, then it no longer downloads MP3 or 1080p MP4. Mozilla should separate out add-ons that everyone can use from premium service add-ons.

*click* REQUIRES PRO VERSION
*click another button* REQUIRES PRO VERSION
*click third button* REQUIRES PRO VERSION

They really put the "ad" in add-on

Doesn't let you download videos in hardly any of the available formats including MP3s when using old youtube layout. I even grabbed the older version of the add on too, guess what? Plenty of people still use the old layout.

Bait and switch. Plugin page states you can dload 1080p, but it doesnt mention that is only when you "upgrade to pro" until after you actually try to dload a file from youtube in 1080p.

not working

Asking me to pay to download 1 song, offering nothing but MP3 HQ so you have no choice, well played

Seems to require (paid) upgrade to Pro version to scrape MP3s from YouTube. Pass.

first, this extension asks you to upgrade to pro at a fee to start downloading audio streams in 256kbps mp3. secondly, clicking on download as .mp4 forces you to install a native extension that corrupts your windows installation (tested in x64 win10). even after recovering from the corruption and reinstalling with a clean boot, the native extension still forces you on its page when you click on download as .mp4.

all in all, the worst extension i've ever come across. 1click youtube download works far better in all res, hell, even lets you download in 1080p.

no full HD in a freee version

Não baixa em 480p. Don't download at 480p.