This article explains how to appear offline while using Facebook and Facebook Messenger, so you can browse without others knowing you're nearby. Instructions apply to Facebook on desktop, and to the Facebook and Messenger iOS and Android apps.
Facebook – How to be invisible
When you’re on Facebook or Facebook Messenger, friends may notice you’re online and think it’s a good time to message you. Here’s what you can do if you want more privacy.
Go to Facebook.com and select the Messenger icon.
Select Options (three dots).
