• Firefox offers better privacy and security than Chrome, with upcoming support for 200 new add-ons. • While Chrome dominates, Firefox gains ground with user-friendly browsing experience and open-source model. • Mozilla’s focus on user privacy and transparency challenges Google’s ad-centric approach, making Firefox a viable alternative.
from what i understand, it’s possible to re-lock the bootloader and use some kind of security patch to be able to do that. it’s definetely possible.
unfortunately not all custom ROM are able to relock. You can off course use Magisk with Sygisk and then you can use your costum rom phone for bankig apps and google wallet. I am using one myself - https://lineageos.org/