So it's the same as if your were using a fork nah? The only difference is that mozilla does know that you use a Firefox browser because telemetry is disabled
Even when using forks of Firefox you are contributing to the Mozilla project and can support it as well
Using librewolf is better than using chrome in term of support for the main devs Mozilla
In any case a VPN is not anonymous but more private than without. Only some can be used as real privacy voucher (for example Mullvad, iVPN (and maybe proton...)), other are great for torrenting but in any case for privacy, they are not really transparent upon their security + surely friend with most of the intelligence agencies
Basically any cheap VPN is good for torrenting as we don't need complete anonymity but more of a proxy like connection, to not receive letters from ISPs telling us our use of internet
My bad