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!