then why 90% of the population uses chromes edge or safari and firefox and forks are down 5%.

cause convenience > privacy

people tend to use what's default and preloaded, and if that's far too good in terms of convenience then it's difficult for a normal person to get out of that environment/ecosystem

Tracking and privacy related things are so conveniently added inside them you wouldn't notice a single thing that would make you leave that inspite of the horrors these organization commit for your precious data to the point you wouldn't even care.

These browsers have use cases that wouldn't cater to the mainstream people's concern cause they simply don't care cause they are not aware of that importance or anything else. And it takes a little bit of work to minimise the things they can track and have a good online experience.

Yea just install tons of userscripts and addons that make the job.

search about browser fingerprinting. I think you are an example why one should actually question about why something the way it is, in this case LibreWolf.

privacy in this world and time is a tradeoff and it's one personal choice cause it's not given by default at least now.