Disable Facebook
Facebook's XMPP gateway, long officially deprecated, doesn't appear to work anymore. https://bugzilla.mozilla.org/show_bug.cgi?id=1236133#c0
Need to apply, https://hg.mozilla.org/comm-central/rev/4f1b3e5af8ef and adapt for #13323 (closed).
Also, close down #17464 (closed) and remove all the places we mention Facebook support (project page, faq, etc).
On a brighter note though, I believe there's a libpurple implementation, so hope that a JS prpl will emerge, and someone on IRC was mentioning working on it during GSoC.
The new protocol is based on mqtt.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information