With more than 500 million active users on Facebook, users spend most time on Facebook where you can use that time for other productive things if you’re willing to get out from addiction from Facebook, Facebook Runner extension for Opera shows the time you spent on Facebook when Facebook tab is opened, so with more time you spent shown by Facebook Runner you can sign out of your Facebook account.

know time spent on Facebook with Facebook Runner Opera Extension

Facebook Runner extension runs only Facebook tab is active, it stops automatically when Facebook tab is not active.

Update : Facebook Runner is now available for Firefox, Chrome and Safari browsers.

Facebook Runner homepage