Using the code, please help me to do the list below:
Update the system status: change the <title to reflect the current page
Update the system status: give a class of “active” to the <li navigation elements
Fix the endpoints, so that navigating to them directly does not cause a 404 error.
Implement History.js: https://github.com/browserstate/history.js/
make a fallback for browsers that are not Java-Script enabled
Click the Chrome menu in the top right hand corner of your browser
Click Show advanced settings
Under the “Privacy” section, click the Content settings button.