Excellent little tool that does exactly what it says it will. I use it for peer reviewing front end dev and quickly checking that a design has been implemented with the correct font sizes. If I were to offer one suggestion it would be to give an option to make the popup panel a fixed position and full height so you can see more info at one time.

Funktioniert super – danke für die hilfreiche Erweiterung

The Concept is good and useful sometimes (that is why i gave it a second star) but the issue is the UI, The UI never shoes up when you click on the toolbar icon and thefore has no use. I would love to see this extension actually being used hopefully the developers can get it fixed! B)

Terrible