used to be good but through efforts to thwart these extensions it's become rather messy and convoluted.
requires a 'companion app' installed catch certain videos, which takes hours to d/l and convert. you might as well just install AVC which catches more than this and is over 10x faster.

Requiring a second download, in order to function. If I recall, it used to be a stand-alone add-on. However, I'm receiving a message that I need to download some other application, in order for DLH to operate.

Здравствуйте, отключите пожалуйста сочетание клавиш ALD+[arrow down/up] - это очнь мешает жить!

Most recent version is coy about which versions require the paid software extension and which do not.

Отвратительное дополнение.

На экране выбора скачиваемого файла почти никогда не показывается размер файла. Скачивание идёт медленно, сильно загружая при этом оперативную память. Очень часто после скачивания файла начинается какая-то "Сборка", которая в ста процентах случаев занимает вдвое больше времени, чем само скачивание. Несколько раз была ситуация, когда после скачивания файла его нет на компьютере.

Не надёжное дополнение, но выручит, если загружаете видео только с Ютуба.

It used to be the best around. Nowadays it doesn't offer an option to never convert any downloaded video. It forcibly converts any video you download (except for Youtube) and adds a watermark to it if the converter isn't registered.

The download button is a mess. It never used to be great, but it was good.

Need donate for removing Watermarks.

Works well for some videos. For others, you need an additional download.
Installed the companion application. First video I tried had huge watermark. Sure I can remove the watermark, for $28. Seriously overpriced.
Uninstalled...

I have been using DownloadHelper for years now, and have contributed to their service.
I know we are not supposed to post bug reports here, but there is nothing in the add-on community about the problem I am having, and no response from bug reports.
No matter what video website I am using, only partial videos download on most videos. I have removed and reinstalled the add-on and associated add-on and checked for updates numerous times, but no change. I have reported the bug, but no response at all for weeks. Others have reported this, and I've tried to use their suggested fixes, but nothing has worked.
IF they get this bug out of the system, I will rerate this add-on for 5 stars. It used to be excellent for years, and now this bug I can't fix.
HELP anyone?

I've started getting the message that videos are being converted and leaving a qr code after using this thing for a year. I have never asked the program to convert videos. If I want that I can do it myself easily after downloading. So, I've been looking for a way to turn this conversion on the fly feature off but I can't. So rather than waste anymore time I'm just going to stop using it. Seems easier. Too bad, it was fairly easy to use. Hopefully there's one that gets the job done without trying to force me to purchase a license.

Установив крайнюю версию (7.3.5) обнаружил крайне неприятную штуку: при попытке скачать видео, предлагает установить какую-то прогу, а там - платная рега. Вот так.. Без доната не скачать. Буду пробовать более ранние версии.
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7.1.2 - крайняя версия, качающая без установки какой-либо другой проги.

Complicated user interface, but once you got it figured out, it works well for the most part. My biggest gripe is their 1080p requires a software installation outside of Firefox. Okay fine. After the time-consuming task of downloading and finalizing the download, they stick a giant QR code block on the video and mention how you need to pay to download videos without the giant obstruction. Would have been nice to know all this crap in the description or some kind of notification before downloading the 1080p video.

Cant get version 7.3.4 to work. It always asks to install a new companion (1.2.4?), which I did as I am using Xubuntu, but the problem stays