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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/rendering/framebuffer-texture-switch.html b/dom/canvas/test/webgl-conf/checkout/conformance/rendering/framebuffer-texture-switch.html
new file mode 100644
index 0000000000..0043bc74de
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance/rendering/framebuffer-texture-switch.html
@@ -0,0 +1,87 @@
+<!--
+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 framebuffer texture attachment switching conformance 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="64" height="64"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+"use strict";
+description("Test framebuffer texture attachment switching. The test uses one framebuffer object and switches its color attachment.");
+var wtu = WebGLTestUtils;
+var canvas = document.getElementById("canvas");
+
+var gl = wtu.create3DContext("canvas");
+var program = wtu.setupTexturedQuad(gl);
+
+var fb = gl.createFramebuffer();
+gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+
+var tex2 = gl.createTexture();
+gl.bindTexture(gl.TEXTURE_2D, tex2);
+gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+
+var tex1 = gl.createTexture();
+gl.bindTexture(gl.TEXTURE_2D, tex1);
+gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, canvas.width, canvas.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+
+gl.clearColor(1.0, 1.0, 1.0, 1.0);
+
+wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
+
+var iterate = function(checkFBOs, iterations) {
+    for (var i = 0; i < iterations; ++i) {
+        debug("Clearing tex1 to white");
+        gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex1, 0);
+        if (checkFBOs)
+            shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+        gl.clear(gl.COLOR_BUFFER_BIT);
+
+        debug("Copying tex1 to tex2");
+        gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex2, 0);
+        if (checkFBOs)
+            shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
+        gl.drawArrays(gl.TRIANGLES, 0, 6);
+    }
+    // Read what is in tex2
+    wtu.checkCanvas(gl, [255,255,255,255], "tex2 should be white");
+};
+
+debug("");
+debug("Warm-up iteration");
+iterate(true, 1);
+
+debug("");
+debug("Iterating the test a few times since at least one bug it has exposed is somewhat flaky.");
+for (var i = 0; i < 3; ++i) {
+    debug("");
+    debug("Iteration " + (i + 1));
+    iterate(false, 2);
+}
+
+debug("");
+wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors at the end of the test.");
+
+finishTest();
+
+var successfullyParsed = true;
+</script>
+</body>
+</html>
+