Re:Facebook disabling messaging in its mobile web app to pus...
by christop on Sunday June 05, 2016 @02:06PM
(#11842213)
There's a nice XMPP extension for that.
Spec: https://xmpp.org/extensions/xep-0301.html Demos: http://www.realjabber.org/
Not that Google (or whoever) are going to implement it now...
"Instant Messaging" indeed!
https://en.wikipedia.org/wiki/Talk_(software)