→ You’ve just given away your account. They’ll change your password within minutes.
Tools like Profile Picture Viewer on the Chrome Web Store allow users to right-click a profile to "Unlock full size profile picture". fb profile picture viewer
For users looking to optimize their own presence rather than bypass others' privacy: Optimization → You’ve just given away your account
Some "viewers" are designed to help users see the full-size version of a profile picture, especially if the account is locked. fb profile picture viewer
The search for an is understandable. We are curious creatures. But the tools promising easy answers are built on deception.