Don't be discouraged by negative reviews! This extension works flawlessly. Most connection issues are easily solved by correctly connecting the extension to the Motrix app via RPC Secret.

Quick Installation Guide:
1. In Motrix App: Go to Preferences --> Advanced.
2. Find the RPC Secret. If it is empty, create one and copy it.
3. In Firefox Extension: Open the Options or Settings of the Motrix extension.
4. Paste the copied RPC Secret into the “RPC Secret (Token)” field.
5. Make sure that the RPC Listening Port (default 16800) matches in both Motrix and extension settings.
6. Save the extension settings.

That's it! Keep Motrix running in the background. Motrix is one of the best download managers. It is open source and handles HTTP, FTP and Magnet connections efficiently. Thank you to the developers, I highly recommend you to use this extension and motrix software!

Works like a charm! Only thing I dont know is whether you can show the download within Firefox's "Downloads" menu?
But thats not really needed, just a bonus

Cool