Title:
Friend Mapper – Visualize Your Facebook Connections

Short Description (max 140 chars):
Turn your Facebook friends into an interactive world map. See where your friends live at a glance.

Full Description:

🌍 See your Facebook friends on a map
Friend Mapper scans your Facebook friends’ public location info (city, hometown, current city) and pins them on an interactive world map. Instantly visualize your global network.

📍 Key Features:

⚡ How it works:

❓ Does this violate Facebook’s terms?
This extension only accesses data you can already see on your Facebook friends page. It does not automate interactions, post anything, or collect data for third parties. Use responsibly.

Note: The availability of these extensions fluctuates due to Facebook’s frequent API changes and policy updates. Always verify the extension is updated within the last 6 months.

The mechanism used by these extensions is documented in computer science literature as inference attacks or neighbor attacks.

The most prominent example of this in the real world was the "Facebook Friend Mapper" (or similar tools like "Marauders Map" in the past). These tools rely on a discrepancy between what users think is private and what is actually public.

The Technical Mechanism (The "Paper" Explanation): Facebook’s privacy model often hides the Friend List of a user (the node).

The extension doesn't need to see User A's list. It looks at User B's list. By scraping the friend lists of everyone else on the platform (or a target group), the extension can mathematically deduce that if User B is friends with User A, and User C is friends with User A, the hidden map of User A can be reconstructed.

This is known in research as "Reconstruction of Social Graphs via Public Data."

You are granting a Chrome extension permission to read all data on facebook.com. That includes private messages (if you scroll past them) and non-public friend lists (if your friends have hidden their lists). Ask yourself: