I have used IDM for many years and version 6.40.3 doesn't work correctly. IDM does NOT open when a link is clicked and it doesn't even show up on the right click menu for any links. The only way I can use IDM is to copy a link. After I do that, IDM wakes up and asks if I want to download. If I need to copy each link individually, IDM serves no purpose.
I have tried removing and reinstalling but that doesn't seem to change anything. Sometimes, if I close Firefox and restart the browser, IDM will start out working again, but after a few minutes it fails.
Also, on pages with lots of video links like Twitter, IDM only seems to recognize the first video on the page.
You've taken what was a great addon and completely ruined the experience!

superb

Thanks for fix,, now working great. :)

it's been a while since this addon not working as it is should, the IDM download panel in YouTube always captures videos in 144p quality, so I have to refresh the site several times (3-6) to capture the other all quality (144,240,360,720P.....)

It's not working after the update.
You have to delete and reinstall the extension each time you close the browser :(

P.S. THE NEW UPDATE FIXED IT. MANY THANKS.

The best for downloading videos

@Nicholas, afaik getting the trusted badge depends only on Mozilla staff, ie how often they bother to review the add-on. And since you've installed desktop app, don't you already trust them? Because any desktop program have infinitely more power and access than just a browser add-on