I use plenty of extensions and find that I can’t read usefully the address a page is on. This is because there is unused space before and after the address box:
the gray, empty space above the two black bars I’ve added. Chrome doesn’t waste this space.
It’s often important to see the actual address.
I can see more if I make the browser window really wide, but this shouldn’t be necessary. In the example shown, the browser window was 1252 pixels - not unusually small.
(PC running Windows 7)