Tap the three dot menu icon next to ‘Add to Story' Here, you should see a Lock Profile option, tap on it The next page will give you a brief on how it works with an option to Lock Your Profile at the bottom, tap on it You should see a pop-up that says ‘You Locked Your Profile', tap on OK Lock Facebook profile via desktop While there is no direct way to lock your app from the browser, there is a workaround that you can use if you do not have access to the mobile app: Head to https://www.facebook.com/