import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

testing/web-platform/tests/service-workers/stub-3.2.9-navigator-service-worker-onupdatefound.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html>
+<title>Service Workers: onupdatefound</title>
+    <head>
+        <link rel="help" href="https://w3c.github.io/ServiceWorker/#navigator-service-worker-onupdatefound">
+        <script src="/resources/testharness.js"></script>
+        <script src="/resources/testharnessreport.js"></script>
+
+    </head>
+    <body>
+
+<!--
+
+`navigator.serviceWorker.onupdatefound` is the [event handler][1] that must be
+supported as attribute by the `[ServiceWorkerContainer][2]` object. An
+`updatefound` event using the `[Event][3]` interface is dispatched on
+`[ServiceWorkerContainer][2]` object (See step 4 of the [_Installation
+algorithm][4]) when the associated Service Worker [registration][5] for the
+document enters the [installation process][6] such that
+`navigator.serviceWorker.installing` becomes the new [installing worker][7].
+
+[1]: http://goo.gl/rBfiz0
+[2]: #service-worker-container-interface
+[3]: http://goo.gl/Mzv7Dv
+[4]: #installation-algorithm
+[5]: #registration
+[6]: #installation-process
+[7]: #installing-worker
+
+-->
+
+
+
+    <script>
+        test(function() {
+            // not_implemented();
+        }, "There are no tests for section onupdatefound so far.");
+    </script>
+
+    </body>
+</html>
+