Description from extension meta
See how long your tabs have been open!
Image from store
Description from store
Too many tabs open? Can't remember how long it's been since you last looked at that webpage?
TabTimer shows a running timer in each open tab to remind you how long you have had the same tab open.
TabTimer will reset the timer if you move to another page or refresh the current page.
A project by https://twitter.com/pdquant