[lelanthran]

It's very pretty, but isn't something like this better implemented as an unobtrusive (until it needs to be) local app?

I wouldn't mind using something like this but it needs to live in the system tray/taskbar/dock/etc.

Not in a tab in the web browser.

[dimitri-vs]

Agreed and if you're on Windows I would highly recommend this one: https://chris.dziemborowicz.com/apps/hourglass/