diff -r 000000000000 -r 6474c204b198 browser/devtools/inspector/test/browser_inspector_bug_665880.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/inspector/test/browser_inspector_bug_665880.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+  ignoreAllUncaughtExceptions();
+
+  let doc;
+  let objectNode;
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function() {
+    gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
+    doc = content.document;
+    waitForFocus(setupObjectInspectionTest, content);
+  }, true);
+
+  content.location = "data:text/html,<object style='padding: 100px'><p>foobar</p></object>";
+
+  function setupObjectInspectionTest() {
+    objectNode = doc.querySelector("object");
+    ok(objectNode, "we have the object node");
+    openInspector(runObjectInspectionTest);
+  }
+
+  function runObjectInspectionTest(inspector) {
+    inspector.once("inspector-updated", performTestComparison);
+    inspector.selection.setNode(objectNode, "");
+  }
+
+  function performTestComparison() {
+    is(getActiveInspector().selection.node, objectNode, "selection matches node");
+    let target = TargetFactory.forTab(gBrowser.selectedTab);
+    executeSoon(function() {
+      gDevTools.closeToolbox(target);
+      finishUp();
+    });
+  }
+
+  function finishUp() {
+    doc = objectNode = null;
+    gBrowser.removeCurrentTab();
+    finish();
+  }
+}