Session Context — what a web page knows about you
Summary
This article explains how a single web page can infer extensive details about a browser, device, and user through passive signals, many of which stay in the browser. It covers the concept of browser fingerprinting, entropy calculations, and signals like HTTP headers, fonts, and screen characteristics. It also discusses the potential for cross-site tracking, and notes that most data collection happens without explicit consent, highlighting privacy and security implications for SMB IT and web developers.