The best!

Used to be great. Now it download everything as a webm, poor quality even when 1080p selected and put a big QR code on top left corner that send you to a registration to pay now for the extension. No thanks.

Requires you to install another shit plugin

Won't actually download much useful unless you download their companion software.

tried to use it for couple weaks now, never even once managed to actually download anything, I mean yea I have a file it downloaded but its corruped/cant be opened.
The interface is confusing especially if you download their software.

This addon is scam of paywall captcha just to make people pay, i hate it and the way it's promoted, if you want money find a better way please.

Does not work and requires you to install companion app. After installing companion app still does not work...

Don't work on firefox snap ubuntu 22.04!!!
"Companion application not installed", but installed.
I can't find an older version of firefox, where can I find it? If I find it (.deb), will it work even though I have installed the snap version???

"Companion application required" but I already have the app installed.

Funktioniert leider nicht mehr. Die zusätzliche Software, die man dafür benötigt, lässt sich unter Windows zwar intallieren, wird aber vom Add-on nicht erkannt. Es kommt nur noch die Fehlermeldung: Prüfen der Begleitanwendung ergab: An unexpected error occurred.
Ohne diese Begleitanwendung ist das Add-on leider nutzlos. Support gibt es keinen. Das Support-Forum unter Google Groups ist von Google gesperrt mit dem Hinweis: Die Gruppe "Video DownloadHelper Q&A" enthält anscheinend Spam, Malware oder andere schädliche Inhalte.

don't work with linux
War mal eine gute Erweiterung. Seit neuestem wird nach einer "Begleitanwendung" gefragt. Installiert man sie, wird dennoch jedes mal aufs neue nach einer Begleitanwendung gefragt. Nutzlos geworden. Schade. Installation für Ubuntu lohnt nicht.

Funktioniert nicht mehr. Habe keine Seite gefunden, auf der der Downloader nicht eine externe Anwendung (vermutlich Spyware) benötigt hätte.

Installed the extension, added the helper app, and no matter what I did the resultant files were unplayable. Literally in VLC player nothing would happen. The file would have a 0:00 time length. No errors, just an unplayable file.

The Add-on does not work for me anymore, at least on Youtube. I have deleted cookies and history cache, reinstalled Firefox, reinstalled the add-on. This did not help. Something is broken. It starts downloading, then indicator turns red, showing the error that it can not extract data from some tmp file. The error appears regadless of the video resolution. Too bad. Other video downloading add-ons work fine.

I understand that You need funds to develop add on. I can agree with qr code hardly . But two things: converter changes resolution, quality and smoothnes of downloaded videos; QR is much to big. My opinion is that You are going to loost users neighter got money.