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diff --git a/dom/performance/tests/performance_observer.html b/dom/performance/tests/performance_observer.html
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+++ b/dom/performance/tests/performance_observer.html
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+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE html>
+<meta charset=utf-8>
+<html>
+<head>
+<title>Test for performance observer</title>
+<script>
+'use strict';
+[
+ "promise_test", "test", "setup",
+ "assert_true", "assert_equals", "assert_array_equals",
+ "assert_throws", "assert_unreached"
+].forEach(func => {
+  window[func] = opener[func].bind(opener);
+});
+function done() {
+  opener.add_completion_callback(() => {
+    self.close();
+  });
+  opener.done();
+}
+
+</script>
+<script src="test_performance_observer.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<script>
+function makeXHR(aUrl) {
+  var xmlhttp = new XMLHttpRequest();
+  xmlhttp.open("get", aUrl, true);
+  xmlhttp.send();
+}
+
+promise_test(t => {
+  var promise = new Promise(resolve => {
+    performance.clearResourceTimings();
+
+    var observer = new PerformanceObserver(list => resolve(list));
+    observer.observe({entryTypes: ['resource']});
+    t.add_cleanup(() => observer.disconnect());
+  });
+
+  makeXHR("test-data.json");
+
+  return promise.then(list => {
+    assert_equals(list.getEntries().length, 1);
+    assert_array_equals(list.getEntries(),
+                        performance.getEntriesByType("resource"),
+                        "Observed 'resource' entries should equal to entries obtained by getEntriesByType.");
+
+    // getEntries filtering tests
+    assert_array_equals(list.getEntries({name: "http://mochi.test:8888/tests/dom/base/test/test-data.json"}),
+                        performance.getEntriesByName("http://mochi.test:8888/tests/dom/base/test/test-data.json"),
+                        "getEntries with name filter should return correct results.");
+    assert_array_equals(list.getEntries({entryType: "resource"}),
+                        performance.getEntriesByType("resource"),
+                        "getEntries with entryType filter should return correct results.");
+    assert_array_equals(list.getEntries({initiatorType: "xmlhttprequest"}),
+                        performance.getEntriesByType("resource"),
+                        "getEntries with initiatorType filter should return correct results.");
+    assert_array_equals(list.getEntries({initiatorType: "link"}),
+                        [],
+                        "getEntries with non-existent initiatorType filter should return an empty array.");
+  });
+}, "resource-timing test");
+
+done();
+
+</script>
+</body>