funny enough… it was a feature flag to move it to the bottom on android for a while before but they removed that too
The technology just isn’t there yet
It used to be able to do it via an experimental feature, then they took that feature away. https://www.dignited.com/114084/how-to-relocate-the-chrome-address-bar-on-your-android-device/
It smacks of some VP of product development hating on the concept, despite it being optional, and wont back down over the decision. Most likely they used the navigation buttons on the bottom and this caused their great big sausage fingers a problem.
Chromium Forks like Cromite and Brave have this feature already.
I would recommend arkenfox over librewolf, that way you can use an up to date browser, with the same privacy and greater flexibility to enable features you may want (e.g. no letterbox etc).
LibreWolf massively improved it’s update schedule and you can disable any feature you dislike. They have a separate page in the normal user-facing settings for disabling stuff like letterboxing, no need to use about:config. It’s better for new users, but also just more convenient for power users. Having to explain how to harden Firefox to a new user would not be ideal.
My old windows phone did this and I loved it. I’m surprised its taking Google this long to do this. Not that I use chrome but still