What is WebGL fingerprinting?
WebGL queries your graphics stack — vendor, renderer model, supported extensions, and shader precision — which varies between devices and drivers.
What trackers learn
Even when canvas is blocked, WebGL can identify a GPU family. Tor Browser and hardened Firefox builds may mask vendor/renderer strings or use a software renderer.
On the analysis page, open the JavaScript tab for WebGL renderer details and privacy flags when probes succeed.
Anti-fingerprinting guide · Hub
Test WebGL signals
Test WebGL signals