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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=462957
+-->
+<head>
+  <title>Test for Bug 462957</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="text/javascript" src="manifest.js"></script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=462957">Mozilla Bug 462957</a>
+
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+// Test for Bug 462957; HTMLMediaElement.buffered.
+
+var manager = new MediaTestManager;
+
+function testBuffered(e) {
+  var v = e.target;
+
+  // The whole media should be buffered...
+  var b = v.buffered;
+  is(b.length, 1, v._name + ": Should be buffered in one range");
+  is(b.start(0), 0, v._name + ": First range start should be media start");
+  ok(Math.abs(b.end(0) - v.duration) < 0.1, v._name + ": First range end should be media end");
+
+  // Ensure INDEX_SIZE_ERR is thrown when we access outside the range
+  var caught = false;
+  try {
+    b.start(-1);
+  } catch (ex) {
+    caught = ex.name == "IndexSizeError" && ex.code == DOMException.INDEX_SIZE_ERR;
+  }
+  is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on under start bounds range");
+
+  caught = false;
+  try {
+    b.end(-1);
+  } catch (ex) {
+    caught = ex.name == "IndexSizeError" && ex.code == DOMException.INDEX_SIZE_ERR;
+  }
+  is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on under end bounds range");
+
+  caught = false;
+  try {
+    b.start(b.length);
+  } catch (ex) {
+    caught = ex.name == "IndexSizeError" && ex.code == DOMException.INDEX_SIZE_ERR;
+  }
+  is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on over start bounds range");
+
+  caught = false;
+  try {
+    b.end(b.length);
+  } catch (ex) {
+    caught = ex.name == "IndexSizeError" && ex.code == DOMException.INDEX_SIZE_ERR;
+  }
+  is(caught, true, v._name + ": Should throw INDEX_SIZE_ERR on over end bounds range");
+
+  removeNodeAndSource(v);
+  manager.finished(v._token);
+}
+
+function fetch(url, fetched_callback) {
+  var xhr = new XMLHttpRequest();
+  xhr.open("GET", url, true);
+  xhr.responseType = "blob";
+
+  var loaded = function (event) {
+    if (xhr.status == 200 || xhr.status == 206) {
+      ok(true, `${url}: Fetch succeeded, status=${xhr.status}`);
+      // Request fulfilled. Note sometimes we get 206... Presumably because either
+      // httpd.js or Necko cached the result.
+      fetched_callback(window.URL.createObjectURL(xhr.response));
+    } else {
+      ok(false, `${url}: Fetch failed, headers=${xhr.getAllResponseHeaders()}`);
+    }
+  };
+
+  xhr.addEventListener("load", loaded);
+  xhr.send();
+}
+
+function startTest(test, token) {
+  // Fetch the media resource using XHR so we can be sure the entire
+  // resource is loaded before we test buffered ranges. This ensures
+  // we have deterministic behaviour.
+  var onfetched = function(uri) {
+    var v = document.createElement('video');
+    v._token = token;
+    v.src = uri;
+    v._name = test.name;
+    v._test = test;
+    v.addEventListener("loadeddata", testBuffered, {once: true});
+    document.body.appendChild(v);
+  };
+
+  manager.started(token);
+  fetch(test.name, onfetched);
+}
+
+// Note: No need to set media test prefs, since we're using XHR to fetch
+// media data.
+manager.runTests(gSeekTests, startTest);
+
+</script>
+</pre>
+</body>
+</html>