diff -r 000000000000 -r 6474c204b198 docshell/test/browser/browser_bug349769.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docshell/test/browser/browser_bug349769.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+function test() {
+  waitForExplicitFinish(); 
+
+  var newTab;
+  var newBrowser;
+  const secMan = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);
+  var iteration = 1;
+  const uris = [undefined, "about:blank"];
+  var uri;
+
+  function testLoad(event) {
+    newBrowser.removeEventListener("load", testLoad, true);
+    is (event.target, newBrowser.contentDocument, "Unexpected target");
+    var prin = newBrowser.contentDocument.nodePrincipal;
+    isnot(prin, null, "Loaded principal must not be null when adding " + uri);
+    isnot(prin, undefined, "Loaded principal must not be undefined when loading " + uri);
+    is(secMan.isSystemPrincipal(prin), false,
+       "Loaded principal must not be system when loading " + uri);
+    gBrowser.removeTab(newTab);
+
+    if (iteration == uris.length) {
+      finish();
+    } else {
+      ++iteration;
+      doTest();
+    }
+  }
+
+  function doTest() {
+    uri = uris[iteration - 1];
+    newTab = gBrowser.addTab(uri);
+    newBrowser = gBrowser.getBrowserForTab(newTab);
+    newBrowser.addEventListener("load", testLoad, true);
+    var prin = newBrowser.contentDocument.nodePrincipal;
+    isnot(prin, null, "Forced principal must not be null when loading " + uri);
+    isnot(prin, undefined,
+          "Forced principal must not be undefined when loading " + uri);
+    is(secMan.isSystemPrincipal(prin), false,
+       "Forced principal must not be system when loading " + uri);
+   }
+
+   doTest();
+}
+