Hi
I want to programming new UI for opnsense and rebranding it
But after restart all of change remove and back to default
For example change icon, web page, logo
How do I change UI and logo
You can copy the OPNsense theme directory and make your own.
Examples of themes can be found here:
https://github.com/opnsense/plugins/tree/master/misc
BTW: If your changed don't survive a reboot, then you are likely working with a live system and not an installed system. An installed OPNsense will only overwrite changes to its source files when you install updates.