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diff --git a/dom/canvas/test/webgl-mochitest/test_fuzzing_bugs.html b/dom/canvas/test/webgl-mochitest/test_fuzzing_bugs.html
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+++ b/dom/canvas/test/webgl-mochitest/test_fuzzing_bugs.html
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+<!DOCTYPE HTML>
+<title>WebGL fuzzy bugs</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css">
+<script src="driver-info.js"></script>
+<script src="webgl-util.js"></script>
+<body>
+<script>
+
+// Test the framebufferTexture2D() call with a unbound texture.
+function framebufferTexture2D_bug1257593() {
+  var canvas = document.createElement('canvas');
+
+  var gl = null;
+  gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');
+  if (!gl) {
+    todo(false, 'WebGL framebufferTexture2D test, webgl is unavailable.');
+    return;
+  }
+
+  var texture = gl.createTexture(); // only createTexture(), but no bindBuffer()
+  gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.TEXTURE_CUBE_MAP_NEGATIVE_Z, texture, 0);
+
+  ok(true, 'WebGL framebufferTexture2D with unbound texture');
+}
+
+// Test to call ClearBufferXXX() during context lost.
+function webGL2ClearBufferXXX_bug1252414() {
+  var canvas = document.createElement('canvas');
+
+  var gl = canvas.getContext('webgl2');
+  if (!gl) {
+    todo(false, 'WebGL2 is not supported');
+    return;
+  }
+
+  var ext = gl.getExtension('WEBGL_lose_context');
+  if (!ext) {
+    todo(false, 'WebGL ClearBufferXXX test, ext WEBGL_lose_context is unavailable.');
+    return;
+  }
+
+  // Force to lose context.
+  ext.loseContext();
+
+  // Even thought the context is lost, all clearBuffer* function should still
+  // work without crash.
+  gl.clearBufferiv(gl.COLOR, 0, new Int32Array(10));
+  gl.clearBufferuiv(gl.COLOR, 0, new Uint32Array(10));
+  gl.clearBufferfv(gl.DEPTH, 0, new Float32Array(10));
+  gl.clearBufferfi(gl.DEPTH_STENCIL, 0, 0.0, 0);
+
+  ok(true, 'WebGL2 clearBufferXXX call during loseContext');
+}
+
+// Test gl function for multiple gl contexts switch.
+function getFramebufferAttachmentParameter_bug1267100()
+{
+  var canvas1 = document.createElement('canvas');
+  var canvas2 = document.createElement('canvas');
+
+  var gl1 = null;
+  gl1 = canvas1.getContext('webgl') || canvas1.getContext('experimental-webgl');
+  if (!gl1) {
+    todo(false, 'WebGL getFramebufferAttachmentParameter test, webgl is unavailable.');
+    return;
+  }
+  var gl2 = null;
+  gl2 = canvas2.getContext('webgl') || canvas2.getContext('experimental-webgl');
+  if (!gl2) {
+    todo(false, 'WebGL getFramebufferAttachmentParameter test, webgl is unavailable.');
+    return;
+  }
+
+  gl1.bindFramebuffer(gl1.FRAMEBUFFER, gl1.createFramebuffer());
+  gl2.scissor(0, 1, 2, 3);
+  // The gl call should still work even though we use another gl context before.
+  gl1.getFramebufferAttachmentParameter(gl1.FRAMEBUFFER,
+                                        gl1.COLOR_ATTACHMENT0,
+                                        gl1.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME);
+
+  ok(true, 'WebGL test getFramebufferAttachmentParameter');
+}
+
+// Test to call getFragDataLocation() when the fragment shader is detatched.
+function getFragDataLocation_bug1259702() {
+  var canvas = document.createElement('canvas');
+
+  var gl = canvas.getContext('webgl2');
+
+  if (!gl) {
+    todo(false, 'WebGL2 is not supported');
+    return;
+  }
+
+  var program = gl.createProgram();
+
+  var vertexShaderSrc =
+    "void main(void) { \
+       gl_Position = vec4(1.0, 1.0, 1.0, 1.0); \
+    }";
+  var fragmentShaderSrc =
+    "void main(void) { \
+       gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); \
+    }";
+
+  var vertexShader = gl.createShader(gl.VERTEX_SHADER);
+  var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
+
+  gl.shaderSource(vertexShader, vertexShaderSrc);
+  gl.compileShader(vertexShader);
+  gl.attachShader(program, vertexShader);
+
+  gl.shaderSource(fragmentShader, fragmentShaderSrc);
+  gl.compileShader(fragmentShader);
+  gl.attachShader(program, fragmentShader);
+
+  gl.linkProgram(program);
+  if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
+    var lastError = gl.getProgramInfoLog(program);
+    ok(false, 'WebGL getFragDataLocation() test, error in linking:' +
+        lastError);
+    return;
+  }
+
+  gl.useProgram(program);
+
+  gl.detachShader(program, fragmentShader);
+  // Test the getFragDataLocation() call after detatch the shader.
+  // This call should not hit crash.
+  gl.getFragDataLocation(program, "foobar");
+
+  ok(true, 'WebGL getFragDataLocation() call after detatch fragment shader');
+}
+
+function run() {
+  webGL2ClearBufferXXX_bug1252414();
+  framebufferTexture2D_bug1257593();
+  getFramebufferAttachmentParameter_bug1267100();
+  getFragDataLocation_bug1259702();
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+
+try {
+  var prefArrArr = [
+    ['webgl.force-enabled', true],
+    ['webgl.enable-webgl2', true],
+  ];
+  var prefEnv = {'set': prefArrArr};
+  SpecialPowers.pushPrefEnv(prefEnv, run);
+} catch (e) {
+  warning('No SpecialPowers, but trying WebGL2 anyway...');
+  run();
+}
+</script>
+