Overriding Mozilla port blocking

Some Mozilla Help - this page has information on how to override security features to allow a custom port. Fixes the "Access to the port number given has been disabled for security reasons" error.

OK so I'm back 9 months later with instructions for the latest versions of Mozilla Firefox. Go to the address about:config which will let you edit the configuration preferences. Add a new string value called network.security.ports.banned.override. The value should be a comma delimited string of the ports to allow. Navigate away from that page and your settings will be saved!