Please post a screenshot of what you mean?

See the owl on the right? there is a mouse on his left that is totally obscured. How to shorten the address bar so it shows the owl and mouse?

You can add more flexible spaces at the at the right end of the location bar and possibly remove the flexible space at the left (right-click: Remove from Toolbar) to see if that is enough to see more of the lightweight theme. You can make more toolbars (Menu bar, Bookmarks Toolbar) permanently visible.

I see, cor-el answered the question for you. Thanks cor-el.

Not even close. Look closely at the address window. There seems to be no way to shorten it.

This is how it looks with ten flexible spaces at the right end of the location bar.

Did you try to add a lot of flexible spaces?

ok but trying the method you posted did not solve the issue.

Ok I got that to work this time! Thanks