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diff --git a/toolkit/mozapps/webextensions/test/mochitest/test_bug609794.html b/toolkit/mozapps/webextensions/test/mochitest/test_bug609794.html
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index 000000000..d13e6ef2f
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+++ b/toolkit/mozapps/webextensions/test/mochitest/test_bug609794.html
@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=609794
+-->
+<head>
+  <title>Test for Bug 609794</title>
+  <script type="application/javascript" 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=609794">Mozilla Bug 609794</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 609794 **/
+var obj = Object.create(window);
+is(Object.prototype.toString.call(obj.InstallTrigger), "[object InstallTriggerImpl]", "can get InstallTrigger through the prototype");
+
+</script>
+</pre>
+</body>
+</html>