It's crap there are waaaay too many options and sometimes none of them work.

Requires installing an external application.

You must install additional program and pay close to 30 dollars for convert to mp3. n/c

New version puts a big QR code in the upper left corner of videos, and asks for a donation. And they don't take paypal anymore. THe download is now super processor intensive and takes a long time. With this change in policy and performance, I wouldn't be surprised if it was mining virtual currency. Definitely uninstalling.

This program shouldn't be rocommended at all. It is not freeware, but share-ware or nag-ware. Shame on firefox developpers: your credibility is in danger

此插件會使Twitch與YouTube實況不相容，同時開啟兩者的情況下會造成瀏覽器卡死。

Uninstalled: it turned into crapware.

ADDS WATERMARK to downloaded videos. Pay to remove.

For audio: it doesn't work anymore on, e.g., SoundCloud. Only reports and downloads short ~100K snippets. I won't install a companion app anyway. Looking for different solutions.

It got ENSHITIFIED! Forces you to install a program on your computer, raising privacy concerns (no forced program prior to 2020), adds HUGE watermarks on your videos unless you pay. Extortion. Bad software. I want a browser add-on, not a program with watermarks and privacy breaches. Mozilla should remove this.

This USED to be the best video down loader. But, now it it entirely crippled and can only down load with a companion app....one that I do not trust.

Are you kidding me? First you have to install another program to download anything. Then you have a watermark on the downloaded video. How is this any good?

I just tried to download a 30 sec video and it never deteceted

no funciona con Ubuntu 20.04 LTS

Can't use it because Apple won't allow the companion app to be installed

TLDR: Find another solution to fill your download desires. Very disappointed with Mozilla for permitting this app to be marketed this way. Have come to expect better from Mozilla, though that is meant in the very best of ways since I've never encountered an app worthy of a negative review on the site before.

How things have changed. Seem to remember this working as advertised back in the beginning.
Now, not so much. Free add-on places an intrusive code in top corner. Can't miss it. To get rid of it or download in any useful file format or other feature you might need, you have shell out $27! for a "companion app".

Still spotty at best. But if you're into frustrating download experiences that end without you getting your download, this is definitely the app for you.
Strong pass.

Although it should be noted, most seem satisfied.

Crapola, need companion app to download anything, some sort of malware probably.

I ended up trying to update the compainion app cause I thought 'hey maybe that will allow me to download from twitter', given before it was spotty at best then just stopped working all together.

It wouldn't update, at all, cause I needed 'admin permission' despite being the admin. Okay, I'll just delete it. I couldn't, and now there's about 50 mb of data as junk files left on my computer cause I'm unable to delete said files, or even uninstall fully, cause apparently the files ffmpeg and the net download helper coapp thing are stuck on my computer cause I don't have permissions to remove them. I'm not dealing with this anymore, I'm done.

Don't use this.

requires a companion app to download anything and its a huge pain in the A

This was good like 6 years ago, now you can't download anything, you can only "stream" it and watch it through their own player, I need something to download and have it on my laptop, this add on is AWFUL!

Requires a desktop app for windows or mac to work at all. WASTE OF TIME.