Facebook officially dropped XMPP support a while ago and effectively
broke it two weeks ago:
https://developer.pidgin.im/ticket/16701
Our pidgin-facebookchat port uses an API even older than the XMPP one.
The URL listed:
https://code.google.com/p/pidgin-facebookchat/
redirects to the new plugin:
https://github.com/jgeboski/purple-facebook
which is being implemented as a Pidgin GSoC project. It's already
functional and reasonably stable, so it could be ported. I don't have a
Facebook account and I'm not interested in maintaining it. (I am a
Pidgin GSoC student, though, which is why I'm the one reporting this.)
I also got confirmation from the author of the current plugin that ours
is broken.
The tl;dr is that it should be deleted and optionally replaced.
