Sure, but what about in 2 years from now?
I used IronFox for a couple years and it suddenly stopped getting updates, and it took me a few months to realize and switch to something else. I don't want that to happen again.
I like the idea of librewolf, especially that it's just a patch set on top of Firefox, but someone needs to maintain that patch set. This would be fine for simpler software, but browsers are complex and I just worry that updates will stall out with little warning.