Tool Profile

CanvasBlocker

CanvasBlocker — Firefox extension that alters JS APIs to blunt fingerprinting.

At a glance:

First seen:2026-05-31

Last seen:2026-05-31

Sightings:1

Source:github.com

What it is

CanvasBlocker — Firefox extension that alters JS APIs to blunt fingerprinting.

Why developers recommend it

Commenters pointed to it as a working browser-side workaround against fingerprint-heavy pages.

Hacker News evidence

2026-05-31

A commenter said they had used it for a long time and that it got through the Turnstile page.

Cloudflare Turnstile requiring fingerprintable WebGL