Questions on HTML5 based Applications

Hi Experts,

I have following questions on Html5 and browser caching

1)If I visit any e-commerce web site and view/browse any items/products and later I revisit the site I can see previously viewed items at the header/footer section of the home page .How this is happening ?

2)How to improve performance in Html5  based applications(tablet/mobile/desktop)

THanks in advance
ksd123Asked:
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rbudjCommented:
Most likely the website is using cookies to store your browsing habits.

Are you the developer of the applications? Are you responsive? http://en.wikipedia.org/wiki/Responsive_web_design
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