Firefox Magnet links don’t work

You might click on magnet link in Firefox and get: “Firefox can’t find the file at magnet:?xt=urn:btih:aa4b9b…”.


  1. Locate file mimeTypes.rdf, it should be in c:\Users\user\AppData\Roaming\Mozilla\Firefox\Profiles\something.default\.
  2. Open it with some text editor, whichever you use.
  3. Find the line that contains “magnet”.
  4. For deluge it should look like this, for other Torrent clients replace with appropriate path (for example, for Vuze use \Vuze\vuze.exe):

<RDF:Description RDF:about=”urn:scheme:externalApplication:magnet”
NC:path=”C:\Program Files (x86)\Deluge\deluge.exe” />