diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/extensions/test/xpinstall/browser_multipackage.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/extensions/test/xpinstall/browser_multipackage.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,51 @@
+// ----------------------------------------------------------------------------
+// Tests installing an signed add-on by navigating directly to the url
+function test() {
+  Harness.installConfirmCallback = confirm_install;
+  Harness.installEndedCallback = install_ended;
+  Harness.installsCompletedCallback = finish_test;
+  Harness.setup();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.loadURI(TESTROOT + "multipackage.xpi");
+}
+
+function get_item(items, name) {
+  for (let item of items) {
+    if (item.name == name)
+      return item;
+  }
+  ok(false, "Item for " + name + " was not listed");
+  return null;
+}
+
+function confirm_install(window) {
+  let items = window.document.getElementById("itemList").childNodes;
+  is(items.length, 2, "Should be 2 items listed in the confirmation dialog");
+
+  let item = get_item(items, "XPI Test");
+  if (item) {
+    is(item.signed, "false", "Should not have listed the item as signed");
+    is(item.icon, "", "Should have listed no icon for the item");
+  }
+
+  item = get_item(items, "Signed XPI Test");
+  if (item) {
+    is(item.cert, "(Object Signer)", "Should have seen the signer");
+    is(item.signed, "true", "Should have listed the item as signed");
+    is(item.icon, "", "Should have listed no icon for the item");
+  }
+
+  return true;
+}
+
+function install_ended(install, addon) {
+  install.cancel();
+}
+
+function finish_test(count) {
+  is(count, 2, "2 Add-ons should have been successfully installed");
+  gBrowser.removeCurrentTab();
+  Harness.finish();
+}
+// ----------------------------------------------------------------------------