I’m using Brave on my Android 5.0.2 tablet. Chromium/Brave will hide the omnibox when you scroll down in order to preserve screen space. That is a nice feature on small smartphone screens where space is a real asset. However on a 12 inch tablet screen it tends to annoy me. There are even websites who will show rendering issues when the omnibox gets hidden.
So is there a way (about:flags??) to prevent the omnibox from getting hidden.