No solution, but I think we'll never find one if debate, about problems with web privacy, suggests Mozilla is the answer - until they put into actions their words, they shouldn't be seen as the way to go.
Whilst I have reservations about Brave, from a privacy standpoint they appear to be more trustworthy and some of the actions they are involved with, like complaints to regulators are far beyond anything we've seen of Mozilla - sure they may have corporate motives, but right now they appear to align far better with consumer privacy.
There are forks of Firefox that are trying to improve on delivery of privacy
https://tracker.pureos.net/w/pureos/policy/purebrowser/
https://github.com/intika/Librefox
I am not wholly comfortable using Brave because of its dependency on Chromium, too much of a dependency on a single web rendering engine reminds me of IE days.
I would suggest to anyone, install them both and more, you might love browsing the web in emacs (someone must) - if you find a website that doesn't work on Firefox and you need Chrome, then why not use Brave instead?
Personally I'm trying both, I also bought a Librem Laptop so I have PureBrowser too and I'm not afraid to throw some of my money and inconvenience at products that are better at protecting my privacy: for techies we can all do this with relative ease. For non-techies, which is where we really need the sea of change (and who are unlikely to read this), then we can advise them towards Apple's products and make them aware of products like Brave so it can be their "backup" browser if not their first choice - not perfect, but I'd prefer my family to browse using Safari, Firefox (with privacy settings I have to sit down and sort out for them) or Brave; than Chrome.