A "private profile" typically means the user has set their posts and photos to be visible only to friends. A "locked profile" is a specific Facebook feature that bundles several privacy restrictions together, including limiting non-friends to a smaller, lower-resolution version of the profile picture.
Open a desktop browser and go to the Facebook profile of the person whose picture you want to view. view private facebook profile picture better
When a user locks their Facebook profile or sets their audience visibility to "Only Me," clicking on their thumbnail usually does nothing. If you are trying to identify a missing contact, verify a business lead, or protect yourself from phishing bots, a tiny, grainy thumbnail is rarely enough. A "private profile" typically means the user has