Updated Edge and it now seems to put a frame with rounded corners around every website
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?
I sort of understand rounding outside edges for aesthetics since there's nothing lost and it might be easier as a target for resizing, but inside corners are just stupid. You're arbitrarily cutting corners out of content for no good reason.