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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/multisample-with-full-sample-counts.html b/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/multisample-with-full-sample-counts.html
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance2/renderbuffers/multisample-with-full-sample-counts.html
@@ -0,0 +1,98 @@
+<!--
+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">
+<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="32" height="32" style="width: 32px; height: 32px;"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+"use strict";
+var wtu = WebGLTestUtils;
+description(' Test multisample with sample number from 1 to max sample number which also includes the samples that may not be in the supported sample list');
+
+var gl = wtu.create3DContext("canvas", null, 2);
+var size = 32;
+var program;
+
+if (!gl) {
+    testFailed('canvas.getContext() failed');
+} else {
+    program = wtu.setupColorQuad(gl);
+    gl.viewport(0, 0, size, size);
+    var supportedSampleCountArray = gl.getInternalformatParameter(gl.RENDERBUFFER, gl.RGBA8, gl.SAMPLES);
+    var iterationCount = supportedSampleCountArray[0] + 1;
+    for (var i = 1; i < iterationCount; i++)
+    {
+        runTest(gl, i, false);
+        runTest(gl, i, true);
+    }
+}
+
+function runTest(gl, sampleCount, isInverted) {
+    // Setup multi-sample RBO
+    var msColorRbo = gl.createRenderbuffer();
+    gl.bindRenderbuffer(gl.RENDERBUFFER, msColorRbo);
+    gl.renderbufferStorageMultisample(gl.RENDERBUFFER, sampleCount, gl.RGBA8, size, size);
+
+    // Setup multi-sample FBO.
+    var msFbo = gl.createFramebuffer();
+    gl.bindFramebuffer(gl.FRAMEBUFFER, msFbo);
+    gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, msColorRbo);
+
+    // Setup resolve color RBO.
+    var resolveColorRbo = gl.createRenderbuffer();
+    gl.bindRenderbuffer(gl.RENDERBUFFER, resolveColorRbo);
+    gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA8, size, size);
+    // Setup resolve FBO
+    var resolveFbo = gl.createFramebuffer();
+    gl.bindFramebuffer(gl.FRAMEBUFFER, resolveFbo);
+    gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, resolveColorRbo);
+
+    gl.bindFramebuffer(gl.FRAMEBUFFER, msFbo);
+    if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
+        testFailed("Framebuffer incomplete.");
+        return;
+    }
+    gl.clearColor(0.0, 0.0, 0.0, 1.0);
+    gl.clear(gl.COLOR_BUFFER_BIT);
+
+    gl.enable(gl.SAMPLE_COVERAGE);
+    var coverageValue = isInverted ? 0.0 : 1.0;
+    gl.sampleCoverage(coverageValue, isInverted);
+
+    var quadColor = [1.0, 0.0, 0.0, 1.0];
+    gl.useProgram(program);
+    wtu.drawFloatColorQuad(gl, quadColor);
+
+    gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, resolveFbo);
+    gl.blitFramebuffer(0, 0, size, size, 0, 0, size, size, gl.COLOR_BUFFER_BIT, gl.NEAREST);
+
+    gl.bindFramebuffer(gl.FRAMEBUFFER, resolveFbo);
+    wtu.checkCanvasRect(gl, 0, 0, size, size, [255, 0, 0, 255],
+                        "User buffer has been rendered to red with sample = "
+                        + sampleCount + ", coverageValue = " + coverageValue
+                        + " and isInverted = " + isInverted, 3);
+
+    gl.disable(gl.SAMPLE_COVERAGE);
+    gl.deleteRenderbuffer(msColorRbo);
+    gl.deleteRenderbuffer(resolveColorRbo);
+    gl.deleteFramebuffer(msFbo);
+    gl.deleteFramebuffer(resolveFbo);
+}
+
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+</body>
+</html>