Facebook shut down their XMPP service earlier this year and because of this, Pidgin/libpurple no longer supports Facebook Chat. For those of you who want to use Facebook Chat in Pidgin, there's a new plugin which makes this possible, called purple-facebook.
The plugin has been in development for about two months and is still a work in progress, but it is already functional and most things work as expected.
According to its wiki, the Facebook Chat plugin is already implemented for the development version of libpurple, purple3, which has yet to be released and the purple-facebook project is a backport of the purple3 plugin to purple2, the released version of libpurple which is used by Pidgin and other clients.
The reasons for using this plugin instead of a stand-alone Facebook Chat alternative are having all the messaging protocols in one place and of course, the tight desktop integration provided by Pidgin, such as native desktop notifications, taskbar alerts, Unity Launcher unread count and Messaging Menu support (for the Unity features to work, make sure the Unity Integration plugin is enabled in Pidgin).
At the time I'm writing this article, the plugin doesn't support chat/friend additions or removals, but these are on the todo list. Some more advanced features like link previews or stickers are also not supported.
Install purple-facebook in Ubuntu, Linux Mint and derivatives
To install purple-facebook in Ubuntu, Linux Mint and derivatives, you can use the main WebUpd8 PPA. To add the PPA and install the plugin, use the following commands:
sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install purple-facebook
If you don't want to add the PPA, you can download the DEB from HERE (but you won't receive any updates unless you add the PPA). Or, grab the source and build it yourself.
Arch Linux users can install purple-facebook via AUR.
Once installed, add a new account in Pidgin (Accounts > Manage Accounts > Add) and in the Protocol dropdown, select "Facebook (important: NOT "Facebook (XMPP)"):
I should also mention that in the username field, you can enter either your emil, your Facebook username or phone number associated with your Facebook account.
Report any bugs you may find @ GitHub.
plugin seen @ HumanOS
via Web Upd8 - Ubuntu / Linux blog http://ift.tt/1EjJzAF