I switched from Brave to Vivaldi as my second browser on Android because it's still stuck in the 2010's with it's address bar at the top with no ability to change it. The most sold phones for the last half decade have all been 5-6 inches, and unless you have gigantic hands you need to reposition your hand in order to go from typing on the keyboard to the bottom to tapping the URL bar, so I'm on the other side of the fence, very glad that they default to the bottom URL bar and actually have the option to change it to the top for those that want it.

In the settings on Firefox mobile, under Customize, you can choose between address bar on the top or on the bottom of the screen.

Personally I keep it at the bottom, as it's much closer to my thumbs and also the keyboard, so I don't have to adjust my hands to type in a url or search query.

I think the address bar is on top by default now, and that has always been configurable. (Personally I do prefer it at the bottom.)

i am not sure if i understand this post, where else should the address bar be if not at your fingertips at the bottom?

This is indeed exactly the reason why it was placed there in Windows Phone 7 (which is where it first appeared, AFAIK).