The profiles actually come already with AppArmor/FireJail (I think) and are also mainained by them. If they need to be renewed (because of a new update for your browser), a simple update of AppArmor/FireJail in your software manager (apt, pacman, whatever...) is enough.
I also use Firejail like
@JM Security and start my browser with:
Code:
firejail --ignore=seccomp --ignore=protocol firefox-esr %u -no-remote
I don't know what the exact differences between AppArmor and FireJail are, but they do the same thing in the end.