diff -r 000000000000 -r 6474c204b198 browser/devtools/scratchpad/test/browser_scratchpad_help_key.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_help_key.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* Bug 650760 */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  content.location = "data:text/html,Test keybindings for opening Scratchpad MDN Documentation, bug 650760";
+  gBrowser.selectedBrowser.addEventListener("load", function onTabLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onTabLoad, true);
+
+    ok(window.Scratchpad, "Scratchpad variable exists");
+
+    openScratchpad(runTest);
+  }, true);
+}
+
+function runTest()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+  ok(sp.editor.hasFocus(), "the editor has focus");
+
+  let keyid = gScratchpadWindow.document.getElementById("key_openHelp");
+  let modifiers = keyid.getAttribute("modifiers");
+
+  let key = null;
+  if (keyid.getAttribute("keycode"))
+    key = keyid.getAttribute("keycode");
+
+  else if (keyid.getAttribute("key"))
+    key = keyid.getAttribute("key");
+
+  isnot(key, null, "Successfully retrieved keycode/key");
+
+  var aEvent = {
+    shiftKey: modifiers.match("shift"),
+    ctrlKey: modifiers.match("ctrl"),
+    altKey: modifiers.match("alt"),
+    metaKey: modifiers.match("meta"),
+    accelKey: modifiers.match("accel")
+  }
+
+  info("check that the MDN page is opened on \"F1\"");
+  let linkClicked = false;
+  sp.openDocumentationPage = function(event) { linkClicked = true; };
+
+  EventUtils.synthesizeKey(key, aEvent, gScratchpadWindow);
+
+  is(linkClicked, true, "MDN page will open");
+  finishTest();
+}
+
+function finishTest()
+{
+  gScratchpadWindow.close();
+  finish();
+}