Browser is Chromium-based. If upstream Chromium doesn’t have / hasn’t had such a feature then Browser never will.
You could enable Duet under chrome://flags which will add a few buttons to the bottom. One of them is the search button. Every time you tap on it the address bar is focused and ready for typing. At least that keeps you from changing your grip when you want to type in a URL.
Type chrome://flags in the address bar. Type in ‘duet’ and enable it.
Sadly, upstream Chromium is getting rid of or has gotten rid of Duet. I stuck to Chromium/Bromite/Browser v79 for the longest just because of that.
Five buttons at the bottom. Home, Share, Search, Tabs, Menu. It was great. After v80 Duet was crippled. Tabs and Menu are now always at top. Bummer.
Browser, on Pi/e/, is v83 I think. Even though Duet has choices all I get is Home, Search, Share no matter what I select. But still, in this case the Search button is what helps out for the address bar.
Duet on Browser v79.
Duet on v80+.
Anyhind, Fennec (Firefox) Browser has gone from v68 to v81 and as @Anonyme mentioned it now has a bottom address bar. That’s cool but lack of extensions keeps me from adopting it just yet.