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+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE HTML>
+<html>
+<!--
+Tests of DOM Worker Threads with Fibonacci
+-->
+<head>
+  <title>Test for DOM Worker Threads with Fibonacci</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=450452">DOM Worker Threads Fibonacci</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+  const seqNum = 5;
+
+  function recursivefib(n) {
+    return n < 2 ? n : recursivefib(n - 1) + recursivefib(n - 2);
+  }
+
+  var worker = new Worker("fibonacci_worker.js");
+
+  worker.onmessage = function(event) {
+    is(event.target, worker);
+    is(event.data, recursivefib(seqNum));
+    SimpleTest.finish();
+  };
+
+  worker.onerror = function(event) {
+    is(event.target, worker);
+    ok(false, "Worker had an error: " + event.message);
+    SimpleTest.finish();
+  };
+
+  worker.postMessage(seqNum);
+
+  SimpleTest.waitForExplicitFinish();
+
+</script>
+</pre>
+</body>
+</html>