test_webgl_vendor_randomize_fpp.html

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<!DOCTYPE html>

<meta charset="utf-8">

<title>WebGL Vendor Randomize with FPP - Vendor should be randomized</title>

<script src="/tests/SimpleTest/SimpleTest.js"></script>

<script>

/* global SimpleTest SpecialPowers */

SimpleTest.waitForExplicitFinish();

document.addEventListener("DOMContentLoaded", async function() {

  // Enable FPP with WebGLVendorRandomize

  await SpecialPowers.pushPrefEnv({

    set: [

      ["privacy.fingerprintingProtection", true],

      ["privacy.fingerprintingProtection.overrides", "+WebGLVendorRandomize"],

      ["privacy.resistFingerprinting", false]

});

  let canvas = document.body.appendChild(document.createElement("canvas"));

  if (!canvas) {

    SimpleTest.ok(false, "Cannot create canvas");

    SimpleTest.finish();

    return;

  let gl = canvas.getContext("webgl");

  if (!gl) {

    SimpleTest.ok(false, "Cannot get WebGL context");

    SimpleTest.finish();

    return;

  // Try to get the WEBGL_debug_renderer_info extension

  let ext = gl.getExtension("WEBGL_debug_renderer_info");

  if (!ext) {

    SimpleTest.ok(false, "WEBGL_debug_renderer_info extension should be available with FPP");

    SimpleTest.finish();

    return;

  // With FPP and WebGLVendorRandomize enabled, the vendor should be "Mozilla <Base64>"

  let vendor = gl.getParameter(ext.UNMASKED_VENDOR_WEBGL);

  // Verify it starts with "Mozilla "

  SimpleTest.ok(vendor.startsWith("Mozilla "),

    "UNMASKED_VENDOR_WEBGL should start with 'Mozilla ' with WebGLVendorRandomize enabled. Got: " + vendor);

  // Verify it has additional content (the Base64 part)

  SimpleTest.ok(vendor.length > "Mozilla ".length,

    "UNMASKED_VENDOR_WEBGL should have Base64 suffix. Got: " + vendor);

  // Verify the Base64 part looks like Base64 (alphanumeric and =)

  let base64Part = vendor.substring("Mozilla ".length);

  let base64Regex = /^[A-Za-z0-9+/=]+$/;

  SimpleTest.ok(base64Regex.test(base64Part),

    "Base64 part should be valid Base64. Got: " + base64Part);

  SimpleTest.finish();

});

</script>