But does it actually work, or is it just digital snake oil?
: Facebook's "Profile Picture Guard" prevents non-friends from expanding or downloading the image in full size. Locked Profiles facebook profile picture viewer best top
Why this works: Facebook stores the original image on its servers. By removing the cropping instructions, you ask the server for the raw file. This is the highest-resolution method available. But does it actually work, or is it just digital snake oil
: A similar tool for Firefox users that helps display full-size profile images [7, 11]. Best Practices for Your Own Profile Picture But does it actually work