Facebook Friend Mapper Chrome Extension !!hot!! May 2026

The Facebook Friends Mapper was a browser extension that exploited a flaw in the platform's "Mutual Friends" feature to reveal hidden friend lists. Although removed from the Chrome Web Store, the tool highlighted significant privacy risks by allowing users with even one mutual connection to scrape hidden profiles. For more details, visit The Hacker News.

Search and Filter: Easily search for specific friends or filter the graph by friend categories (e.g., friends from work, school, or a specific location).

Customizable: Personalize your graph visualization by choosing different layouts, node colors, and sizes.

Use friend metadata (mutual friends count, interaction frequency, group/page co-memberships, event co-attendance, profile location, workplace/education strings) to compute similarity scores and run clustering (e.g., community detection or hierarchical clustering).
Default: produce 4–8 clusters; allow user-adjustable granularity slider.

The Mutual Friend Requirement: To see a target's hidden friends list, you only needed to have one mutual friend with that person. You did not need to be friends with the target yourself. facebook friend mapper chrome extension