I could care less, but Facebook launched their GoogleTalk clone chat utility the other day. And apparently, just like GoogleTalk you can run it in the sidebar in Firefox. Woot.
The upside to this is now you can chat with all your friends without having to open up Facebook, and you’ll be free to browse other websites while chatting.
To add the Facebook chat to your Firefox sidebar, press Ctrl+Shift+B to bring up the Bookmarks Organizer.
Go to Organize -> New Bookmark and type the following address: http://www.facebook.com/presence/popout.php
Also mark the box that says “Load this bookmark in the sidebar”.