Comment 99 for bug 339772

Thank you for taking the time to make Ubuntu better. Since what you submitted is a Feature Request to improve Ubuntu, you are invited to post your idea in Ubuntu Brainstorm at [WWW] https://brainstorm.ubuntu.com/ where it can be discussed, voted by the community and reviewed by developers. Thanks for taking the time to share your opinion!

Also, there are add-ons to handle your request. Check out addons Foxtorrent and Firetorrent
http://www.raymond.cc/blog/archives/2007/06/16/download-torrent-files-in-firefox-foxtorrent-and-firetorrent-review/