Roy Tanck, at the end of 2023, posted a well written plea to switch to Firefox:

if there’s one tech New Year’s resolution I’d encourage you to have, it’s switching to the only remaining ethical web browser, Firefox.

He provides two^[1] very valid reasons: privacy, and to avoid a browser engine monopoly

Privacy

Firefox is the only major browser not built by a company that makes money from advertising and/or selling your personal data. […] .We need to use browsers that are independent, and right now that means Firefox.

Google recently admitted they still track you when browsing on incognito mode, what more is there to say?

Browser engine monopoly

In the early 2000’s, Internet Explorer had a massive 95% market share. This meant that many sites were only developed for use with IE. They’d use experimental features that IE supported, in favor of things from the official HTML standard. This was a very bad situation, which hindered the development of the World Wide Web.

Allowing one company to control what gets implemented and when leads to stagnation. Competition is healthy.

Go give Firefox a chance.