============== Back Forward List ==============
        http://127.0.0.1:8000/navigation/error404-subframeload.html
        http://127.0.0.1:8000/navigation/resources/frameset.pl?frameURL=otherpage.html
            http://127.0.0.1:8000/navigation/resources/otherpage.html (in frame "footer")
            http://127.0.0.1:8000/navigation/resources/otherpage.html (in frame "main")
curr->  http://127.0.0.1:8000/navigation/resources/frameset.pl?frameURL=otherpage.html
            http://127.0.0.1:8000/navigation/resources/otherpage.html (in frame "footer")
            http://127.0.0.1:8000/navigation/resources/error404.pl (in frame "main")
===============================================