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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/misc/instanceof-test.html b/dom/canvas/test/webgl-conf/checkout/conformance2/misc/instanceof-test.html
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index 0000000000..4ecbd6e2d3
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance2/misc/instanceof-test.html
@@ -0,0 +1,44 @@
+<!--
+Copyright (c) 2019 The Khronos Group Inc.
+Use of this source code is governed by an MIT-style license that can be
+found in the LICENSE.txt file.
+-->
+
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL instanceof test.</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../js/js-test-pre.js"></script>
+<script src="../../js/webgl-test-utils.js"> </script>
+</head>
+<body>
+<canvas id="canvas" width="2" height="2" style="width: 40px; height: 40px;"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script id="vshader" type="x-shader/x-vertex">
+attribute vec4 vPosition;
+varying vec2 texCoord;
+void main()
+{
+    gl_Position = vPosition;
+}
+</script>
+<script id="fshader" type="x-shader/x-fragment">
+precision mediump float;
+uniform vec4 color;
+void main()
+{
+    gl_FragColor = color;
+}
+</script>
+
+<script>
+var contextVersion = 2;
+</script>
+<script src="../../js/tests/instanceof-test.js"></script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>