WebGL Fingerprint Defender

Defending against WebGL fingerprinting by reporting a fake value.

WebGL Fingerprint Defender - Firefox Add-on for Privacy Protection

WebGL Fingerprint Defender is a handy Firefox add-on designed to protect your privacy online. It works by reporting a fake WebGL fingerprint, rather than your actual one when you visit a site or refresh a page. This, in turn, makes it difficult for potential trackers to follow your internet activities. The add-on accomplishes this by simply adding small noise to the actual fingerprint. It's a handy tool for protecting against fingerprint-based tracking while still allowing the use of the WebGL API.

Add-on stats

By: ilGur
Users: 1,937
-49
Rating: 3.63
(32)
Version: 0.1.6 (Last updated: 2022-11-05)
Creation date: 2019-05-29
Weekly download count: 545
Firefox on Android: Yes
Risk impact: Moderate risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • storage
  • contextMenus
  • notifications
Size: 46.90K
URLs: Website

Other platforms

WebGL Fingerprint Defender (v0.1.7)
3.32 (28) 10,000
Not available on Android
WebGL Fingerprint Defender (v0.1.7)
5.00 (1) 3,116
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Add-on summary

WebGL Fingerprint Defender is a browser add-on that let you easily hide your real WebGL fingerprint by reporting a random fake value.

According to many tech blogs, completely blocking WebGL API is not a good idea, therefore reporting a fake fingerprint could be the best solution to better protect your privacy. This add-on simply adds a small noise to the actual fingerprint and renews it every time you visit a website or reload a page.

With the browser's WebGL API, in general, two types of fingerprints can be generated. One with WebGL constants and the other with an image that is rendered with the WebGL API. This addon can spoof both values at the same time.

To disable this add-on, please visit extensions page in your browser and then click on the disable button. Please note that this addon does not any toolbar icon/button.

Note: If you also want to protect your browser against other types of fingerprints, please see my other addons: Canvas Fingerprint Defender, AudioContext Fingerprint Defender.

If you have a feature request, or found a bug to report, please fill out the bug report form on the addon's homepage.

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Randomizes WebGL fingerprint successfully
  • Works as intended for some users
  • Can help protect privacy from fingerprinting
Cons
  • Breaks functionality on popular sites like Google Maps and Twitch
  • Notifications are too frequent and disruptive
  • No options for per-site control or whitelists
Most mentioned
  • Issues with Google Maps and Twitch
  • Desire for customizable settings or whitelisting
  • Notifications are bothersome
User reviews
by Muhammad T, 2024-09-23

Unfortunately it breaks some sites
by Александр, 2024-09-22

Tested on https://browserleaks.com/ and https://webbrowsertools.com/webgl-fingerprint/ Works fine, I get a different fingerprint ID each time I load a page :)
by Quaesitrix, 2024-01-01
View all user reviews

Add-on safety

Risk impact

WebGL Fingerprint Defender requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

WebGL Fingerprint Defender has earned a fairly good reputation and likely can be trusted.

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