Puntuado con 4 de 5 estrellas
I know Nightly isn't officially supported, but in the latest UX builds, Omnibar causes the URL bar to appear thicker than it should.
I managed a temporary workaround with
margin-top: -3px !important;
margin-bottom: -3px !important;
Just a heads-up so you're aware of the issue. Great work on Omnibar so far, btw.