One suggestion: Would be nice if we had an option to see the actual size of the site, discounting the nav bar of the browser.

Hello Thiago,

That is already possible. In a browser, the area where the site is displayed, without borders, navbar, etc. is called the viewport.

Here's how you can enable a tooltip that displays both the window and the viewport size (and assign a keyboard shortcut to toggle it).

Version 1: http://take.ms/T70uU

Version 2: http://take.ms/K3ndR

(You can download version 2 from: https://chrome.google.com/webstore/detail/window-resizer-beta/pnhnbekjlbamfnnemcaolkjchjlidbib)

Best Regards,

Ionuț