diff -r 000000000000 -r 6474c204b198 netwerk/test/unit/test_bug401564.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/unit/test_bug401564.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- Mode: JavaScript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+"use strict";
+Cu.import("resource://testing-common/httpd.js");
+
+var httpserver = null;
+const noRedirectURI = "/content";
+const pageValue = "Final page";
+const acceptType = "application/json";
+
+function redirectHandler(metadata, response)
+{
+  response.setStatusLine(metadata.httpVersion, 302, "Moved Temporarily");
+  response.setHeader("Location", noRedirectURI, false);
+}
+
+function contentHandler(metadata, response)
+{
+  do_check_eq(metadata.getHeader("Accept"), acceptType);
+  httpserver.stop(do_test_finished);
+}
+
+function dummyHandler(request, buffer)
+{
+}
+
+function run_test()
+{
+  httpserver = new HttpServer();
+  httpserver.registerPathHandler("/redirect", redirectHandler);
+  httpserver.registerPathHandler("/content", contentHandler);
+  httpserver.start(-1);
+
+  var prefs = Cc["@mozilla.org/preferences-service;1"]
+                .getService(Components.interfaces.nsIPrefBranch);
+  prefs.setBoolPref("network.http.prompt-temp-redirect", false);
+
+  var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
+  var chan = ios.newChannel("http://localhost:" +
+                            httpserver.identity.primaryPort + "/redirect",
+                            "",
+                            null);
+
+  chan.QueryInterface(Ci.nsIHttpChannel);
+  chan.setRequestHeader("Accept", acceptType, false);
+
+  chan.asyncOpen(new ChannelListener(dummyHandler, null), null);
+
+  do_test_pending();
+}