I was playing with multiple desktops on my new OS, there was a specific monitor in my first desktop that I wanted to just display a couple of websites, since there was nothing else going on in there. As I don't have a tiling wm I just tiled 2 full Chrome instances top and bottom. I wasn't satisfied with how it looked, because it still had all the top controls and borders. After evaluating some options I just decided to make my own solution based on Electron. Basically I made a very minimalist setup with <webview> tags that displays up to 4 different websites at once. There are 16 different layouts to choose from plus a bunch of other options like presets and theme.Certainly very limited as a browser but it works for that niche purpose.
https://github.com/Merkoba/Boneless