There is no need to hope! Luckily all firefox based browsers can be hardened, Librewolf is just hardened by default. I recommend using Arkenfox. It can be applied to your default profile or an additional profile.
I would say Zen by default is a bit more private than default Firefox but not by a lot.
I also went from LibreWolf to Zen and I just accepted that my privacy profile is not that harsh; I just hope it’s safe enough.
There is no need to hope! Luckily all firefox based browsers can be hardened, Librewolf is just hardened by default. I recommend using Arkenfox. It can be applied to your default profile or an additional profile.
I would say Zen by default is a bit more private than default Firefox but not by a lot.