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diff --git a/dom/html/test/forms/test_bug1286509.html b/dom/html/test/forms/test_bug1286509.html
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+++ b/dom/html/test/forms/test_bug1286509.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1286509
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1286509</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.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=1286509">Mozilla Bug 1286509</a>
+<p id="display"></p>
+<div id="content">
+  <input type="range" id="test_input" min="0" max="10" value="5">
+</div>
+<pre id="test">
+  <script type="application/javascript">
+  /** Test for Bug 1286509 **/
+  SimpleTest.waitForExplicitFinish();
+  var expectedEventSequence = ['keydown', 'change', 'keyup'];
+  var eventCounts = {};
+  var expectedEventIdx = 0;
+
+  function test() {
+    var range = document.getElementById("test_input");
+    range.focus();
+    expectedEventSequence.forEach((eventName) => {
+      eventCounts[eventName] = 0;
+      range.addEventListener(eventName, (e) => {
+        ++eventCounts[eventName];
+        is(expectedEventSequence[expectedEventIdx], e.type, "Events sequence should be keydown, change, keyup");
+        expectedEventIdx = (expectedEventIdx + 1) % 3;
+      }, false);
+    });
+    synthesizeKey("VK_UP", {});
+    synthesizeKey("VK_DOWN", {});
+    synthesizeKey("VK_LEFT", {});
+    synthesizeKey("VK_RIGHT", {});
+    is(eventCounts['change'], 4, "Expect key up/down/left/right should trigger range input to fire change events");
+    SimpleTest.finish();
+  }
+  addLoadEvent(test);
+  </script>
+</pre>
+</body>
+</html>