@rhymepurple@lemmy.ml did specifically ask about hardened Firefox, which literally means Firefox with configuration changes to make it more secure.

Having said that, personally I do think Firefox’s default experience is close to the best you can do for people that really just want to install without thinking about it.
Going beyond that quickly results in broken webpages. And broken webpages require that you know what you’re doing, so you can unbreak them, if needed.