diff -r 000000000000 -r 6474c204b198 toolkit/identity/tests/chrome/sandbox_content.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/identity/tests/chrome/sandbox_content.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ *  * License, v. 2.0. If a copy of the MPL was not distributed with this
+ *  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-cache", false);
+
+  let loadedStateKey = "sandbox_content_loaded";
+  switch(request.queryString) {
+    case "reset": {
+      setState(loadedStateKey, "");
+      response.write("reset");
+      break;
+    }
+    case "get_loaded": {
+      response.setHeader("Content-Type", "text/plain", false);
+      let loaded = getState(loadedStateKey);
+      if (loaded)
+        response.write(loaded);
+      else
+        response.write("NOTHING");
+      break;
+    }
+    default: {
+      let contentType = decodeURIComponent(request.queryString);
+      // set the Content-Type equal to the query string
+      response.setHeader("Content-Type", contentType, false);
+      // If any content is loaded, append it's content type in state
+      let loaded = getState(loadedStateKey);
+      if (loaded)
+        loaded += ",";
+      setState(loadedStateKey, loaded + contentType);
+      break;
+    }
+  }
+}