Not a fan of the new look. If you’re in the same boat, plug:
about:config
into your URL bar, and search for:
browser.nova.enabled
Toggle it to false using the button to the right.
There are functional changes that Nova also introduced: this won’t effect those - only the aesthetic.
doing A : B testing with that toggle. It’s definitely hard to see it as anything but a UI downgrade.
The toolbar icons have a blurrier look on my computer on Nova? They just look worse too imo design wise.