Opt out of ads, "might" work...for those companies. But, leaked info from any of them gets leaked and sold over and over.
An Ad blocker keeps ads from being displayed, but tracking cookies and browser history are still collected for data miners.
A 'hosts' file can also block any data from going to tracking sites, so that might help as well.
But, all in all...if your 'browser' is free....IT ISN'T.
If your O/S if free...IT ISN'T.