Doesn't work on youtube. Simply the download never progresses from 0%.

Any time you try to download with this extension it asks you to download an external application.

Еще пару лет назад было лучшим расширением для скачивание видео.. Потом начало показывать тонну мусора в выборе загрузки, а теперь вовсе не находит видео и отображает один лишь бесполезный шлак

Don't touch this with a ten foot pole
https://groups.google.com/g/video-downloadhelper-q-and-a

Became completely useless on twitch, does not work.

This plugin does nothing and was useless for me.

This app worked really well, but in the last Mac OS (v12.x - mojave?) Ventura v13.x i granted an exception to the Apple requirement for "identified" developers, and installed the coapp. But this system will not execute the coapp in the Applications folder, and as a result, the addon cannot communicate with it so the addon does not work on my Macbook Pro. Cannot figure a way around that logjam. thanks

Add-on requires to install *exe program onto PC, hmmm? But still doesnt works properly, sorry not works at all.

Bait and switch. Offers downloads but any video downloaded is transparently converted, significantly lowering the bitrate while also watermarking the stream with a QR code. This code linking a site where visitors are prompted to purchase a license for the 'converter' to remove the watermark. A mark that wouldn't exist if the 'downloader' just downloaded the source without superfluous conversion. It's deceptive, invisibly inserting itself into the media in an effort to trick the gullible into believing they need a license that would, if the media wasn't converted in the first place, be unnecessary. Not to mention it appears they've got some sort of bot service periodically five-star reviewing the extension presumably to bury negative reviews.

You have to pay for an open source converter, or it will encode a large Qr code into the result with poor quality. So here you need an extra program just to be able to collect for this program. This is not what you expect, you want to download the stream without manipulating the stream.

This app worked perfectly for ONE month. Then never worked again. It is worthless and I suggest not wasting time with it.

This add-on is useless and confusing. When I tried to use it, it asked me to submit a URL address. It opened a new tab and gave me the following message "You have to setup a suitable URL for your favorite downloader service. You can use the variable {url} to forward the currently viewed video URL to the downloader service." I don't understand this message and can't understand how this could be a reasonable way of setting up a download service. Nor do I have an URL address to submit to them. What does this mean? There is no explanation, nor supporting page or introduction. I've decided to delete the add-on even though FF recommended it. I'm assuming they made a mistake.

Bullshit extension, most of the time it fails or only downloads part of the vid.