Thanks for your question.
Cachy-Browser is based on librewolf/firefox. We use some selected patches from librewolf and gentoo.
Also it gets compiled with optimizations.
The config is based on the librewolf config, with some little changes. We are looking currently for a maintainer, which finds time to maintain a user friendly but also privacy oriented config for the cachy-browser.
Librewolf is currently in the “cachyos” repo and is a binary package. Since our recent clean up I have removed the cachyos-v3 repo.
I will add librewolf back to the cachyos-v3 repository tomorrow with optimized flags.
Firefox is compiled with optimized compilation flags.