I am happy with Librewolf, I can’t tell about the others since Librewolf kept me satisfied since I started using it.

One is officially the backup key but I sometimes use it at home too as I have a USB-A Main and a USB-C Backup. This is sometimes easier then getting an adapter for USB-C only devices and to make sure nothing is wrong with it.

I use the paid version of bitwarden and would recommend it to anyone who can afford the subscription and two yubikeys.