Deface Your Data

Deface Your Data Anti-Advertiser Tool (August 2021), Chrome Extension. Full code on Github. Download from the Chrome Web Store here.


This program works by using Google’s declarativeNetRequest API to search every URL the user’s browser is directed to visit for certain advertiser-facing URL parameters and replace their values with a custom input that the user enters via a one-time resettable extension pop-up. These parameters are then scraped by analytics tools embedded in the visited website and appear on the dashboards of marketers and site admins looking through their incoming traffic data to optimize their marketing strategy or understand user behavior on their site. The search-and-replace rules that the script creates are dynamic, so the user can at any time change the replacement message they wish to send to advertisers, or reset the extension to no longer edit those parameters.