Microsoft is running one of the largest corporate espionage operations in modern history. Every time any of LinkedIn’s one billion users visits linkedin.com, hidden code searches their computer for installed software, collects the results, and transmits them to LinkedIn’s servers and to third-party companies including an American-Israeli cybersecurity firm.
There are absolutely reasons. Firefox is done by a reasonable job of anti-fingerprinting, and it’s a fine line to walk to disable as many of those indicators as possible without breaking sites.
Browsers do give away too much, but at least Firefox is working on it. And it’s not extremely straightforward.
I use waterfox with all of the privacy and security settings enabled to the max, plus a few extensions like ublock origin, decentraleyes, consent-o-matic, and clearurls.
Not that many sites break. And the ones that do, I don’t visit. If you don’t need to offer an https option, or you don’t work without trackers, I don’t need to go to your site. Simple as that.