There was a long discussion held on whether LibreWolf should be recommended. I haven’t read through most of it but I’m sure you’d find answers somewhere in there. I listed some issues I have with LibreWolf on an unrelated discussion:
If Arkenfox seems too complicated, LibreWolf probably isn’t a good option for you anyways. I think the current Privacy Guides recommendations of using minimally configured Brave or Firefox are the best options for most people. For situations where you want to be extra private, use the Tor Browser.
In case you haven’t already, I’d recommend you really read through the threat modeling page before anything else. I don’t know your situation but to me it sounds like you might be worrying too much about things which aren’t very impactful. There are different schools of thought when it comes to this sort of thing so you’ll find contradicting recommendations depending on what you’re reading.
If you don’t expect to be put in danger or highly targeted, you can spend a lot less time worrying about doing everything perfectly. I’ll try to save you some time by saying nothing is perfect, there are trade-offs with everything and you’ll have to decide what makes sense for your situation. For most people that only needs to consist of following basic recommendations made by resources like Privacy Guides and leaving it at that.