Most of the time I spent on the browser. so, for me Its very important how much time I am spending on different websites.
To Track this, I have created one chrome extension based on HTML5 Visibility API and also published extension to chrome webstore.
So, anyone can able to use it.
Chrome Extension URL:- https://chrome.google.com/webstore/detail/mpnogdjfdofdddkndpffjbhojhhkhccb/
And to generate daily statics, I am using Chart.js Library.