Starting today, Twitter owned Tweet Deck will no longer support facebook usage through the program/application.
Their reason is they want to ‘focus our development efforts on our modern, web-based versions of TweetDeck.”
Sadly the app has also been removed from iOS and Android. But, as of now it still appears available on Mac.
They have also said “we’ve been focused on building a fast and feature-rich web application for modern browsers, and a Chrome app, which offers some unique features like notifications.”
Twitter is still functioning on all devices and want more people to use their own apps over third party applications.