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.
Only thing I can think of is if you are developing a website or extension and need to make sure there isn’t some subtle browser difference. Though since it uses the same engine as Chrome, that use case should be a lot more niche than it used to be.