Troubleshooting guide for Mozilla Firefox Steps on how to download torrents with Mozilla Firefox: 1. Launch Mozilla Firefox. 2. Go to the top right hand corner of browser and click on Torrent Click on Open Torrents. 3. Mozilla page will pop up. Go to that page. Click on + add Torrent box will pop up. 4. Add a torrent file or provide magnet URL. Users can choose files from computer or insert a magnet link.