My grandmother has a Motorola Droid Maxx 2 running Android 6.0.1 and she would like to disable chat heads entirely, for text messages and Messenger. A preliminary search through her notification settings, Google, and this site yielded no results. How can she do this?
NOTE: This is for Facebook Messenger only.
First: Open the Messenger app.
Second: Tap the wrench icon on the top - right.
Third: Click the option: "Chat Heads"
Fourth: Turn it off with the switch.