By automating this process across thousands of profiles, the extension could reconstruct a significant portion of a "private" friend list simply by finding people who did have public lists and were friends with the target. The Fallout and Disappearance
: Similar tools, like "Marauders Map," also existed during this era, allowing users to track friends' exact physical locations via Facebook Messenger data, further highlighting the era's browser-based privacy vulnerabilities. Current Status and Availability
The Facebook Friend Mapper Chrome extension was once one of the most talked-about and controversial privacy-exploiting tools on the internet. While it is no longer available today, its legacy serves as a stark reminder of how digital footprints, social graph data, and open browser extensions can interact to compromise personal privacy.
Fake privacy-piercing tools often use phishing tactics to steal your Facebook password.
If you search for "Facebook Friend Mapper" today, you will find many websites claiming to offer the download file (CRX format) or promoting alternative tools. Staying away from these derivatives is highly recommended due to severe security risks. facebook friend mapper chrome extension
Click "Start Mapping." Facebook’s algorithm detects erratic scrolling. Let it run. For 1,000 friends, this may take 15-20 minutes.
The extension adds a hidden feature directly into your Chrome browser. Here’s the breakdown of how these tools typically work:
The most prominent example of this in the real world was the (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 extension was widely criticized by security experts as a significant privacy threat: By automating this process across thousands of profiles,
Installing the Facebook Friend Mapper Chrome extension is straightforward:
Users who believed they were safe by checking the box "Only Me" or "Friends" for their friend list were exposed.
Warning: Using third-party extensions that interact with Facebook can lead to account suspension or data privacy issues. How to Protect Your Friends List in 2026
Using a tool like Facebook Friend Mapper came with significant risks. Its primary function was to without their knowledge or consent. Furthermore, the extension required broad permissions, such as the ability to "read data on the web pages you visit" (a common requirement for such tools, but one that always represents a potential risk). While it is no longer available today, its
Academic use. While the original Netvizz was shut down by Facebook, open-source clones exist. These extensions focus on downloading structured data (nodes and edges), which you then upload to a visualizer like Palladio or Cytoscape.
You are mapping other people's connections to you. While the data is technically visible to you as a friend, scraping it into a graph to analyze "bridges" or "isolates" can feel invasive. Do not use these tools to stalk, harass, or manipulate social dynamics.
The Facebook Friends Mapper was a free browser extension for Google Chrome created by a developer named Alon Kollmann. First appearing on the Chrome Web Store around 2015, it was a highly controversial tool that promised a feature the platform didn't officially provide: the ability to bypass privacy settings and reveal the of nearly any Facebook user.