Now that Facebook no longer supports XMPP, I was trying to see if I could get Pidgin to work with the new protocol.
There is a plugin that I found that seems promising: https://github.com/jgeboski/purple-facebook/wiki#basic-usage
I dropped libjson-glib-1.0.dll in PidginPortable\App\Pidgin and libfacebook.dll to PidginPortable\App\Pidgin\plugins.
But Pidgin Portable does not load the plugin. I wonder if anyone has had success with this plugin and the portable edition.