A browser extension is going to do what is typically done FOR the whole complex? For Example Kerio Control
. As a user, I will say that in LK, I see even the page URLs where I went, how long I was there. Maybe the admin sees even more))
But for personal use, that sort of thing is: TimeYourWeb Time Tracker
Well considers the time spent on the website, you can watch the day, week, month, etc.