diff -r 000000000000 -r 6474c204b198 browser/components/sessionstore/test/browser_514751.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/sessionstore/test/browser_514751.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+/* 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 test() {
+  /** Test for Bug 514751 (Wallpaper) **/
+
+  waitForExplicitFinish();
+
+  let state = {
+    windows: [{
+      tabs: [{
+        entries: [
+          { url: "http://www.mozilla.org/projects/minefield/", title: "Minefield Start Page" },
+          {}
+        ]
+      }]
+    }]
+  };
+
+  var theWin = openDialog(location, "", "chrome,all,dialog=no");
+  theWin.addEventListener("load", function () {
+    theWin.removeEventListener("load", arguments.callee, false);
+
+    executeSoon(function () {
+      var gotError = false;
+      try {
+        ss.setWindowState(theWin, JSON.stringify(state), true);
+      } catch (e) {
+        if (/NS_ERROR_MALFORMED_URI/.test(e))
+          gotError = true;
+      }
+      ok(!gotError, "Didn't get a malformed URI error.");
+      theWin.close();
+      finish();
+    });
+  }, false);
+}
+