diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug623768.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug623768.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();
+
+  let newTab = gBrowser.loadOneTab("http://www.example.com/#1",
+                                   { inBackground: false });
+
+  // The executeSoon() call is really needed here because there's callback
+  // waiting to be fired after gBrowser.loadOneTab(). After that the browser is
+  // in a state where loadURI() will create a new entry in the session history
+  // (that is vital for back/forward functionality).
+  afterAllTabsLoaded(function() {
+    executeSoon(function() {
+      ok(!newTab.linkedBrowser.canGoBack, 
+         "Browser should not be able to go back in history");
+
+      newTab.linkedBrowser.loadURI("http://www.example.com/#2");
+
+      afterAllTabsLoaded(function() {
+        ok(newTab.linkedBrowser.canGoBack, 
+           "Browser can go back in history after loading another URL");
+
+        showTabView(function() {
+          let contentWindow = document.getElementById("tab-view").contentWindow;
+
+          EventUtils.synthesizeKey("VK_BACK_SPACE", { type: "keyup" }, contentWindow);
+
+          // check after a delay
+          executeSoon(function() {
+            ok(newTab.linkedBrowser.canGoBack, 
+               "Browser can still go back in history");
+
+            hideTabView(function() {
+              gBrowser.removeTab(newTab);
+              finish();
+            });
+          });
+        });
+      });
+    });
+  });
+}
+