This article discusses a tracking method called "supercookie" that uses favicons to create unique identifiers for website visitors. Unlike traditional tracking, this method persists even in incognito mode and cannot be easily cleared by users. It highlights the potential for tracking across major browsers and suggests disabling the favicon cache as a mitigation strategy.

This article explains how to create an efficient set of favicons using just five files and one JSON manifest. It focuses on minimizing the number of icons needed while ensuring compatibility across various devices and browsers. The guide includes practical steps for implementing SVG and PNG formats.