I've used this add-on in Chrome and Firefox and LOVE it!

Firefox is my main browser right now, and just within the last couple of weeks I've been unable to send torrents to my ruTorrent web client, getting this error; "could not download torrent file: 404". I've made some modifications to about:config recently, and wondered if one of those changes had caused the problem. I revisited the changes and have toggled changes on/ off to no avail.

I'd really like to keep using this add-on in Firefox. Any help or a "point in the right direction" would be most welcome.