I have Firefox beta installed and when I visited Facebook the other day I turned on Messenger for Firefox. I tried it and I think I'll pass. However, I do not see any way to uninstall it. I skimmed through Firefox Options and returned to the Facebook "Turn On" page, but I do not see a Turn Off button anywhere. I can't even hide the Facebook buttons added to my navigation toolbar by dragging them into the Customize Toolbar window. The Mozilla article announcing the Social API claims "It’s just as easy to remove", but offers no instructions on how to do so. How can I turn off or uninstall Facebook Messenger for Firefox?