I'm sorry but that's absurd.
Switching to LibreWolf after YEAAAARS of Firefox took me less than five minutes. I've encountered exactly zero downsides and my experience of the internet immediately improved.
Nobody changes operating systems of any sort with such little friction.
I've yet to find anything that it broke after weeks of use... and anyway it takes two seconds to disable that for a few mins in the rare event it's necessary.
Overall an unambiguously better internet experience on LibreWolf coming from years of FireFox for me.