+1 on this request.
I use a Windows 10 tablet much of the time - a Samsung Galaxy TabPro S; roughly comparable to a Surface Pro 3. I’ve found that browsers have terrible support for touch.
Edge is actually the best, as much as I hate to admit it. I really dislike using it, but it’s the only browser I’ve found with a usable UI and decent battery life.
Chrome is second best at the moment - its UI is fine, though small. Pinch-to-zoom works well… but the battery life is abysmal. I get ~6 hours of light browsing in Edge and only ~2-3 in Chrome.
Firefox comes in after Chrome, mostly because of their decision to implement pinch-to-scale. I really, really wish this were configurable but as far as I can tell it’s not. I have no idea what battery usage is like, because the lack of zoom makes it all but unusable.
Brave comes in last in this area. Pinch-to-zoom should be priority #1 for improving tablet usability, but the interface could use some tweaks as well. A “tablet mode” would awesome. Off the top of my head, UI should be scaled to about 200% of the “normal” by default, and the close button should appear all the time. As it is, to close a tab I have to long-press the tab, then click the tiny little “x”.