Canvas fingerprinting in the wild

This article explains canvas fingerprinting — a device fingerprinting technique that renders invisible 2D images and text (often including emojis) via the HTML5 Canvas API and hashes the result to create a stable, device-unique identifier used for tracking, bot detection, and fraud prevention; it covers the technique's origins, examples and code, reasons for emoji usage, related WebGL/WebAudio approaches, and potential future use with WebGPU.