If a profile was once public but is now locked, the Wayback Machine might have a "snapshot" of the page from a time when the picture was accessible. A Note on Privacy and Safety
(Chrome Extension): This is a popular, free tool that adds an "Unlock full size profile picture" option when you right-click on a Facebook profile Chrome Web Store FB Profile Picture Viewer facebook profile picture viewer url free
The most reliable way to view a profile picture at a larger scale is by manipulating the profile's unique URL or ID. Copy the Profile Link If a profile was once public but is