In 2021, various online sources began promoting a supposed "fix" to view private Facebook photos without being friends. These solutions often involved using specific browser extensions, scripts, or third-party services. However, upon closer inspection, these claims appear to be exaggerated or entirely unfounded.
If you start typing a message to a non-friend on Messenger, Facebook sometimes shows a small thumbnail of recent photos in the chat composer. This is erratic and only works on desktop browser; it’s not a reliable method, but some 2021 users reported seeing 2-3 small profile photos this way.