You never have to be interrupted by your friend's floating head again.
Chat Heads were introduced several years ago on Facebook Messenger for Android. The feature uses profile pictures of the people you're talking to on Messenger as shortcuts for the chat—they pop up on your screen, regardless of what you're doing, and invite you to tap into the conversation.
While the feature can be useful sometimes, it's mostly just in the way when you're doing something else on your phone.
Messenger also has a feature that lets you directly reply from your notification bar when you need to, so the Chat Heads are frankly a bit superfluous—and again, annoying. But they're still on by default. Read more...More about How To, Facebook Messenger, Facebook, and Tech