Pretty UCI Registrar (PUR) is a browser extension that aims to modernize the fairly archaic UCI Class Schedule & Web Registration pages.
It as support for many of the pages with URLs similar to 'https://www.reg.uci.edu'. PUR also has support for the UCI OATH page, modernizing the UCI login page with a dark mode interface.
Extensive work has been put towards a modernized dark mode styling for the Class Schedule pages--both the search, results, and requirements pages--and the web registration page--from adding classes to the study/waitlist and viewing enrollment statuses.
