What is uncomfortable about Librewolf? I thought it was basically FF without telemetry and UBO already baked in?

I appreciate librewolf but when I used to use it, IIRC its fingerprinting features were too strict for some websites IIRC and you definitely have to tone it down a bit by going into the settings. Canvases don't work and there were some other features too.

That being said, Once again, Librewolf is amazing software. I can see myself using it again but I just find zen easier in the sense of something which I can recommend plus ubO obv

Personally these are more aesthetic changes more than anything. I just really like how zen looks and feels.

The answer is sort of, Just personal preference that's all.