Guard against CSS data exfiltration attacks. Guard your browser against CSS Exfil attacks! CSS Exfil is a method attackers can use to steal data from web pages using Cascading Style Sheets (CSS). This plugin sanitizes and blocks any CSS rules which may be designed to steal data. Side Note : I'm only packaging and publishing this extension for mike-gualtieri, i don't have done any modification to it and all rights are owned by mike-gualtieri, and if he publish this extension himself or ask me to remove it i will remove it from the store, if not i will provide any update done on it's GitHub.