Make firefox open magnet protocol use xdg-open.
- Open Firefox and type in about:config in the Address Bar and hit Enter.
- Type in enter
handler.expose in the search box at the top of the list.
- right click — New — Boolean
- Enter the preference name
network.protocol-handler.expose.magnet
- Set its value to
false
- Click on a magnet link and you should see Firefox’s Launch Application Choose Dialog
- Select
/usr/bin/xdg-open.