people who are not friends on Facebook won’t be able to tag anyone, including themselves, in your profile picture. Facebook also says that it will prevent others from taking a screenshot of your profile picture on Facebook where possible. This feature is currently available only on Android devices. With the new Photo Guard, users who opt for the new tool will see a blue border and shield around their profile pictures as a visual cue of protection. If you are excited about Facebook’s new photo guard feature then follow the below steps to secure your profile photo.
How to Use Facebook Profile Picture Guard Tool
Open your Facebook profile.
Tap your profile photo.
You will then see the option (pictured below) to Turn on profile picture guard.
If selected, you will get the option to Save, and then see your profile photo with the shield symbol.