Edit: Looks like you can opt-out of that “new look and feel” pretty easily under the appearance settings but still, whats with putting rounded corners everywhere?
Edit 2: “Explore the web with a softer, more friendly aesthetic featuring rounded corners […] Designed to complement your operating system, whether on Windows 11, MacOS, or Linux.” The fuck does that mean? Windows 11 fair enough but most Linux distros don’t look like that at all.
You’re joking, but that’s how I unintentionally use the web with Arc Browser. It has rounded corners and an adjustable sidebar of tabs on the right. The resulting viewport is tightly 4:3. Iirc, Edge can also have tabs on the side.