RescueTime

RescueTime tracks the time you spend in the currently active tab or window of your browser. This gives you a clear picture of what you were actually doing all day.

If you walk away from your computer for a few minutes, RescueTime automatically figures out when you're away and stops tracking.

RescueTime does it's best to auto-categorize the sites you visit. It also scores them on a scale from Very Productive to Very Distracting. You can easily fine-tune the defaults to suit your needs. It's also simple to pause RescueTime, or delete any time you'd rather not have tracked.

Why it's awesome:

You’ll never have to ask "Where the #@%! did my day go!?" again. RescueTime lets you see how you spent your time on a day, week, or month basis.

Everyone has those sites that they "only check a couple times a day" These can add up to a lot of time without you realizing it. RescueTime makes it easy to see.

Having good information and constant feedback helps you manage your time better, so you can spend your day the way you'd like.

If you already have a full RescueTime account, this extension will work hand-in-hand with it, giving you an at-a-glance view of all the time you are tracking.