work as intended, i use this alongside elephant addons (with ffmpeg & yt-dlp depedencies) and i can download pretty much any video, even encrypted HLS and youtube. It works better than IDM/ABDM with these setup

edit :

found some issues, fdm resets the connection every time you close it or update. easy fix: just run `FDM_Linker.bat` once, then find the config file it generated in fdm's mozilla folder inside (appdata\local\softdeluxe\free download manager\mozilla) and set it to "read-only". after that, it will work permanently.