Brilliant. I am often losing track of time while spending most of that time on the internet, opening new tabs all the while. With this add-on, it's basically impossible for me to lose track of time (or even the date!) while I'm browsing the web. My favorite feature of this add-on might be that I can simply open a new tab and leave it there to have the time visible in the tab bar, a place I glance much more often and comfortably than my taskbar (when the taskbar is even visible). And though I don't spend much time on the new tab page itself, the minimalistic look is very clean. The only thing missing for me, personally, is the ability to adjust the horizontal spacing of the time display; I like the numbers bigger but I'd like to be able to squeeze them closer together.