Unfortunately, the extension doesn't work.
If you want 100% functional integration between JDownloader and the browser (whichever it is), use the MyJDownloader extension that's available on the app's official website.

Remote captcha handling completely fails due to the new Google/Cloudflare requirements.

Usless addon and application with absurd 30 min cd after downloading SINGLE file...

worthless and can not work this crap addon

It add a notification, a pop up page and, stop the download with out it now. Very annoying, removed

missing info

Literally does not work in any way, shape, or form. The textbook definition of useless. Probably exists just to give out viruses.

Inutilizzabile.

Bugged with new firefox version. Please update.

Use at your own risk! Overly complex install instructions. Requires downloading & running external files. Could not use. Despite neither my antivirus nor an online file scanning site being able to detect anything malicious in the file, it actually erased part of a software tool I tried to use to delete remnants of the install software left behind! Actually, part of the install software deletes itself after seemingly failing to do anything. I honestly can't imagine a more frustrating or suspicious browser addon!

Can't register an account on their site, and need to log in to contact admin. Geniuses. Also, the registration page uses an image captcha then, right below that, has a spam protection text box. Apparently they don't realize the two do the same thing. If they can't even manage to not screw up a forum registration process, I don't trust them to make software I'm going to run on my computer.

It doesn't work with Firefox now, only Chrome.

Don't waste your time; it's been reported on GitHub with no response from the dev.
What a shame. I donate to FOSS projects that don't suck.

В версию ФайерФокс 52.9 его не загрузить - отстой!!!!

doesn't work

It doesn't work on Linux.

Не работает.

Does not work for version 60.0.2 of Firefox and jDownloader 2 even after modifying the location of the application manually.

Doesn't work, won't open the JDownloader app.

MacOS 10.12

Don't work