There are no legal or functional extensions that can reveal a completely private Facebook friend list. Software claiming to do so is almost certainly a scam.
If you manage to install a legacy version of the Chrome extension, the general process described by users is as follows: Facebook Friend Mapper Extension Download
The simple answer is that the extension no longer exists on the official Chrome Web Store. Search results are littered with outdated blog posts on sites like Weebly and Mystrikingly, many of which confirm it is . Attempts to find working links lead to dead ends or potentially dangerous third-party websites. There are no legal or functional extensions that
That’s the bait.
Users typically found the extension (often titled "Social Revealer" or similar) in the Chrome Web Store. Search results are littered with outdated blog posts
The extension scanned the public friend lists of mutual connections to scrape and reconstruct the hidden network of User A.
The Facebook Friend Mapper extension is a browser add-on that uses advanced algorithms to map out your Facebook friend network. By visualizing the connections between your friends, you can gain a better understanding of your social circle and discover new relationships.