This addon replaced DownThemAll on my Firefox. However I have noticed a bug. Downloaded file list indicates that previously downloaded files are Deleted! (They are not deleted in anyway and are there in the downloads folder) Please take a look at the screenshot below.
After restarting Firefox, the downloaded files are not accessible to extensions anymore. This is an unresolved Firefox bug. See the previous report: https://github.com/jingyu9575/multithreaded-download-manager/issues/5
