2.3 webgui beta theme?

[usual]

What is different between the default pfsense theme in 2.3 and the BETA one in the drop down?

[NOYB]

The Beta theme selections includes /usr/local/www/css/pfSense-BETA.css (or pfSense-dark-BETA.css).
You can put your own experimental css in those to tailor the GUI as you like.

[jdillard]

@NOYB:

The Beta theme selections includes /usr/local/www/css/pfSense-BETA.css (or pfSense-dark-BETA.css).
You can put your own experimental css in those to tailor the GUI as you like.

It's more a place for experimental CSS in pfSense itself. It came into being when a lot of changes were flying to the ALPHA version. So, in theory (as some changes require more than just CSS to implement), someone could put a (more radical design) idea in that file and say "Hey, check out the BETA file and let me know what you guys think" and build on it further based on the feedback or if people like it, then merge into the main CSS.

If someone wants to make their own override file they should create a similar file in the same directory with a different name, otherwise it might get overridden in a future release.