How to remove the focus box on the url bar in Chrome?
The blue box around the URL is not a function of, or unique to Chrome.
The blue box appears in Google Chrome and also in Chromium Edge. Same thing.
So blue box is part of the common foundation to the two browsers and there is no setting to remove it in either browser.
Click somewhere else and the blue highlight disappears. I am sure some people find that helps them focus themselves on the URL.
Followup: The same thing occurs from time to time in Firefox. So it is a very common user feature.
I suggest just adapting to it. I hardly even notice it.