Should I use the default firefox on Qubes OS

I'm installing Qubes OS for the first time, and I was wondering if there is any disadvantage to installing librewolf (or something similar) as my primary browser instead of default firefox?

If I do want to do this, is there a recommended method beyond "install it as normal in the template"? I notice that when creating a new qube, there is a menu for additional applications; how exactly does that work?

For practical reasons I might also want to install some kind of chromium based browser (probably helium), but I wouldn't expect to use it much.