diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 59f6c3ea86b..e246ef6fbf5 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -11927,16 +11927,6 @@
     [
      {}
     ]
-   ],
-   "webgl/OWNERS": [
-    [
-     {}
-    ]
-   ],
-   "webgl/common.js": [
-    [
-     {}
-    ]
    ]
   },
   "testharness": {
@@ -20875,42 +20865,6 @@
      "/_mozilla/mozilla/worklets/test_worklet.html",
      {}
     ]
-   ],
-   "webgl/bufferSubData.html": [
-    [
-     "/_mozilla/webgl/bufferSubData.html",
-     {}
-    ]
-   ],
-   "webgl/compressedTexImage2D.html": [
-    [
-     "/_mozilla/webgl/compressedTexImage2D.html",
-     {}
-    ]
-   ],
-   "webgl/compressedTexSubImage2D.html": [
-    [
-     "/_mozilla/webgl/compressedTexSubImage2D.html",
-     {}
-    ]
-   ],
-   "webgl/texImage2D.html": [
-    [
-     "/_mozilla/webgl/texImage2D.html",
-     {}
-    ]
-   ],
-   "webgl/texSubImage2D.html": [
-    [
-     "/_mozilla/webgl/texSubImage2D.html",
-     {}
-    ]
-   ],
-   "webgl/uniformMatrixNfv.html": [
-    [
-     "/_mozilla/webgl/uniformMatrixNfv.html",
-     {}
-    ]
    ]
   }
  },
@@ -32998,38 +32952,6 @@
   "mozilla/worklets/throw_exception.js": [
    "6ca4f80fc2728c00848bb4474b62fa3596ed2f18",
    "support"
-  ],
-  "webgl/OWNERS": [
-   "7507064ad72f41047fe1db39c3cb95da7ffea252",
-   "support"
-  ],
-  "webgl/bufferSubData.html": [
-   "a97df9062d6ea964e500059e155b29604edc21b6",
-   "testharness"
-  ],
-  "webgl/common.js": [
-   "416c21ce9330d3f73576b6b5aa01dab06c5798ee",
-   "support"
-  ],
-  "webgl/compressedTexImage2D.html": [
-   "b0a031add0be018f995e4463114d333a0d9eb85a",
-   "testharness"
-  ],
-  "webgl/compressedTexSubImage2D.html": [
-   "539f9e17f8a811c5acb4f07cf6cbd17015726632",
-   "testharness"
-  ],
-  "webgl/texImage2D.html": [
-   "2f769160dfdeaa3b0a73380e5540b30dfc971489",
-   "testharness"
-  ],
-  "webgl/texSubImage2D.html": [
-   "294b30c7607edc38aed19a31e44c5237eee8b970",
-   "testharness"
-  ],
-  "webgl/uniformMatrixNfv.html": [
-   "f75cbcb99724219224c63d0dc595b1c001298500",
-   "testharness"
   ]
  },
  "url_base": "/_mozilla/",
diff --git a/tests/wpt/mozilla/tests/webgl/OWNERS b/tests/wpt/mozilla/tests/webgl/OWNERS
deleted file mode 100644
index 7507064ad72..00000000000
--- a/tests/wpt/mozilla/tests/webgl/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-@emilio
diff --git a/tests/wpt/mozilla/tests/webgl/bufferSubData.html b/tests/wpt/mozilla/tests/webgl/bufferSubData.html
deleted file mode 100644
index a97df9062d6..00000000000
--- a/tests/wpt/mozilla/tests/webgl/bufferSubData.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!doctype html>
-<title>bufferSubData</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.5>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script>
-test(function() {
-  var gl = getGl();
-  assert_equals(gl.getError(), WebGLRenderingContext.NO_ERROR);
-
-  var b = gl.createBuffer();
-  gl.bindBuffer(gl.ARRAY_BUFFER, b);
-
-  var a = new Float32Array(1);
-  gl.bufferData(gl.ARRAY_BUFFER, a, gl.STATIC_DRAW);
-
-  var nan = 0 / 0;
-  gl.bufferSubData(gl.ARRAY_BUFFER, nan, a);
-
-  assert_equals(gl.getError(), WebGLRenderingContext.NO_ERROR);
-});
-</script>
diff --git a/tests/wpt/mozilla/tests/webgl/common.js b/tests/wpt/mozilla/tests/webgl/common.js
deleted file mode 100644
index 416c21ce933..00000000000
--- a/tests/wpt/mozilla/tests/webgl/common.js
+++ /dev/null
@@ -1,13 +0,0 @@
-function getGl() {
-  var c = document.createElement("canvas");
-  var gl = c.getContext("experimental-webgl");
-  assert_true(!!gl, "Should be able to get a context.");
-  return gl;
-}
-
-function shouldGenerateGLError(cx, glError, fn) {
-  test(function() {
-    fn();
-    assert_equals(cx.getError(), glError);
-  }, "Calling " + fn + " should generate a " + glError + " error.");
-}
diff --git a/tests/wpt/mozilla/tests/webgl/compressedTexImage2D.html b/tests/wpt/mozilla/tests/webgl/compressedTexImage2D.html
deleted file mode 100644
index b0a031add0b..00000000000
--- a/tests/wpt/mozilla/tests/webgl/compressedTexImage2D.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!doctype html>
-<title>compressedTexImage2D</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script>
-test(function() {
-  var COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0;
-  var gl = getGl();
-
-  var tex = gl.createTexture();
-  gl.bindTexture(gl.TEXTURE_2D, tex);
-
-  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
-    gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8));
-  });
-  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
-    gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8), null);
-  });
-  test(function() {
-    assert_throws(new TypeError(), function() {
-      gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0);
-    });
-  }, "Should throw a TypeError when passing too few arguments.");
-});
-</script>
diff --git a/tests/wpt/mozilla/tests/webgl/compressedTexSubImage2D.html b/tests/wpt/mozilla/tests/webgl/compressedTexSubImage2D.html
deleted file mode 100644
index 539f9e17f8a..00000000000
--- a/tests/wpt/mozilla/tests/webgl/compressedTexSubImage2D.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!doctype html>
-<title>compressedTexSubImage2D</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script>
-test(function() {
-  var COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0;
-  var gl = getGl();
-
-  var tex = gl.createTexture();
-  gl.bindTexture(gl.TEXTURE_2D, tex);
-
-  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
-    gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT, new Uint8Array(8));
-  });
-  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
-    gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT, new Uint8Array(8), null);
-  });
-  test(function() {
-    assert_throws(new TypeError(), function() {
-      gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT);
-    });
-  }, "Should throw a TypeError when passing too few arguments.");
-});
-</script>
diff --git a/tests/wpt/mozilla/tests/webgl/texImage2D.html b/tests/wpt/mozilla/tests/webgl/texImage2D.html
deleted file mode 100644
index 2f769160dfd..00000000000
--- a/tests/wpt/mozilla/tests/webgl/texImage2D.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!doctype html>
-<title>texImage2D</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script>
-test(function() {
-  var gl = getGl();
-  assert_throws(new TypeError(), function() {
-    gl.texImage2D(0, 0, 0, 0, 0, window);
-  });
-  assert_throws(new TypeError(), function() {
-    gl.texImage2D(0, 0, 0, 0, 0, { get width() { throw 7 }, get height() { throw 7 }, data: new Uint8ClampedArray(10) });
-  });
-});
-</script>
diff --git a/tests/wpt/mozilla/tests/webgl/texSubImage2D.html b/tests/wpt/mozilla/tests/webgl/texSubImage2D.html
deleted file mode 100644
index 294b30c7607..00000000000
--- a/tests/wpt/mozilla/tests/webgl/texSubImage2D.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!doctype html>
-<title>texSubImage2D</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script>
-test(function() {
-  var gl = getGl();
-  assert_throws(new TypeError(), function() {
-    gl.texSubImage2D(0, 0, 0, 0, 0, 0, window);
-  });
-  assert_throws(new TypeError(), function() {
-    gl.texSubImage2D(0, 0, 0, 0, 0, 0, { get width() { throw 7 }, get height() { throw 7 }, data: new Uint8ClampedArray(10) });
-  });
-});
-</script>
diff --git a/tests/wpt/mozilla/tests/webgl/uniformMatrixNfv.html b/tests/wpt/mozilla/tests/webgl/uniformMatrixNfv.html
deleted file mode 100644
index f75cbcb9972..00000000000
--- a/tests/wpt/mozilla/tests/webgl/uniformMatrixNfv.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!doctype html>
-<title>uniformMatrix*fv</title>
-<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
-<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#WebGLRenderingContext>
-<link rel=help href=http://dev.w3.org/2006/webapi/WebIDL/#es-boolean>
-<link rel=help href=http://es5.github.com/#x9.2>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=common.js></script>
-
-<div id=log></div>
-<script id="vshader" type="x-shader/x-vertex">
-uniform mat2 m2;
-uniform mat3 m3;
-uniform mat4 m4;
-</script>
-<script>
-var floatArray = function(n) {
-  var a = [];
-  for (var i = 0; i < n; ++i) {
-    a.push(1);
-  }
-  return a;
-};
-[2, 3, 4].forEach(function(n) {
-  test(function() {
-    var gl = getGl();
-    var f = "uniformMatrix" + n + "fv";
-    var loc = gl.getUniformLocation(gl.createProgram(), "m" + n);
-    gl[f](loc, { valueOf: function() { throw "Error"; } }, floatArray(n));
-  }, "Should not throw for " + n);
-});
-</script>
