Maybe it's time for Firefox premium. Same as on youtube premium or gitlab premium, no ads, no annoyances, additional features, maybe better performance, maybe some value add cloud features, all for 1-20$ a month.
With premium it'd probably be worse, because signing up you'd surely sign an agreement that somewhere on page 37 says "we can track you any way we like, and do anything we like with the data" and you couldn't claim you didn't know - you made an explicit action to sign up and even paid money for it, surely you knew what you're doing!
YouTube Premium is riddled with the same type of user tracking Firefox is implementing. Firefox Premium would probably do the same.