

============== Back Forward List ==============
        http://127.0.0.1:8000/navigation/forward-and-cancel.html  **nav target**
        http://127.0.0.1:8000/navigation/resources/forward-and-cancel-frames-container.html  **nav target**
            http://127.0.0.1:8000/navigation/resources/forward-and-cancel-frames.html (in frame "<!--frame1-->")
                about:blank (in frame "frame1")
            http://127.0.0.1:8000/navigation/resources/otherpage.html (in frame "<!--frame2-->")
curr->  http://127.0.0.1:8000/navigation/resources/forward-and-cancel-frames-container.html
            http://127.0.0.1:8000/navigation/resources/forward-and-cancel-frames.html (in frame "<!--frame1-->")
                http://127.0.0.1:8000/navigation/resources/slow-resource.pl?delay=250 (in frame "frame1")  **nav target**
            http://127.0.0.1:8000/navigation/resources/otherpage.html (in frame "<!--frame2-->")
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