You can select the plugins you want, or just install them all, it’s your choice.

Available plugins:
Bitenova
BitTorrent
Demonoid
Isohunt
Meganova
Mininova
Piratebay
Seedler
Torrentbox
Torrentreactor
Torrentspy
Torrent Typhoon

More BitTorrent and Firefox tips

If you know other plugins that should be in this installer please let me know @ info(at)TorrentFreak.com

Download
Torrent (save me some bandwith)

over 3000 downloads in 24 hours, impressive

Customize websites With Firefox
The great advantage that Firefox has compared to for example IE is that it is far more customizable. I already talked about some of my favorite extensions, and Greasemonkey is another one. Greasemonkey allows you to install all kinds of useful user scripts so you can customize the web to your own needs (in a sense).

Some of my favorite, torrent related scripts are:
Imdb torrent linker
Last.fm torrent linker
Remove crap from Torrentspy
Hide seedless torrents on Piratebay

It is not even that hard to edit those scripts to your own needs, or create scripts of your own. This excellent site has a nice overview of things you can do with Greasemonkey, and more important, how to.