diff -r 000000000000 -r 6474c204b198 dom/tests/mochitest/ajax/lib/AJAX_setup.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/mochitest/ajax/lib/AJAX_setup.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+var AJAXtests = [];
+
+function runAJAXTest() {
+  if (AJAXtests.length == 0) {
+    SimpleTest.finish();
+    return;
+  }
+
+  var test = AJAXtests.shift();
+  var testframe = document.getElementById("testframe");
+  testframe.src = test;
+}
+
+function onManifestLoad(manifest) {
+  if (manifest.testcases) {
+    AJAXtests = manifest.testcases;
+    runAJAXTest();    
+  } else {
+    ok(false, "manifest check", "no manifest!?!");
+    SimpleTest.finish();
+  }
+}
+
+function fetchManifest() {
+  var d = loadJSONDoc("manifest.json");
+  d.addBoth(onManifestLoad);
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(fetchManifest);