[basemntunivrse]

I really like this, it's an excellent idea.

This might be quite useful for developers as well, just as a quick indicator instead of having the Developer Tools Network tab open all the time.

One thing that might be quite useful (though it would probably be beyond the scope of this project and perhaps hard to implement) would be the ability to block any further requests made by the tab. A sort of per-tab 'offline mode'. Perhaps as a context menu option when clicking on the icon.

Also, it would be very interesting to see statistics on which popular websites tend to do the most user-activity tracking, lazy loading etc. - but, in order to collect and collate these statistics your extension would itself have to send background requests to some central API. That'd be quite ironic...

Anyway, nice work!