Project nova is the reason I searched for removing the rounded corners. It looks like Apple's silly UI instead of the clean crisp UI Firefox used to have.
I'm not sure that this is en$#!+ification ... ? Yes, Firefox UI was peak in its origin, as it both respected the OS design by default, while also allowing users to customize pretty much everything with themes. Yes, the UI has been steadily going down...
A 'Win10' theme with square corners, simple solid colors, etc, would be easy for Mozilla to implement and then make it even easier for us to apply everywhere. userChrome.css doesn't seem to sync across all my FF installs.
