Check out Web Timer - an Opera extensions that keep track of how you spend your time on the Web. Web Timer keeps track of the tab that you are actively using and updates its stats every 3 seconds.
- Helps you visualize the time you’re spending by displaying the data in a pie chart.
- Keeps track of stats for today, daily average, and all-time.
- Stops counting when you are idle.
So, how do you spend your time on the Web?