I tried out Helium browser. It’s missing some features yet but there is one feature that I like: they shrunk the tab/url/bookmark bars by about 20%.
Vertical space is a premium as I’m running a 16:9 monitor like many people are. I already move my dock to the left side but am always looking to save vertical space. This would help.
Obviously, you’ll probably want to make this an option since undoubtedly there will be users who will hate it.
Thanks for considering.