To perform Chrome reduce size of address bar, here are the changes that you can make:
Start by open the Google Chrome on your computer.
From the menu option, tap on settings.
On the Google Chrome settings page, in the search bar, type font and press enter.
Select the preferred font size settings under the appearance option for Chrome browser.
With the customize font page, you can change the font size, which is the base size of the website. If you choose the minimum font size option, it will allow you to make the text appear the set size.