WetGeek
WetGeek My reasoning was that if I clicked a link in an email, e.g,, an advertisement I wanted to see, I didn't want that to be blasted into a browser where I was working with a banking session, or trading stocks on my brokerage page. Or the sites I was streaming.
I attempt to resolve the tracking and cross-pollination issues in three ways: (1) I isolate my financial, medical and other sensitive activities in Firefox containers to mitigate the risk of cross-pollination of cookies to and from those sites; (2) I use Cookie AutoDelete in all browsers to help remove tracking cookies as tabs are opened and close; and (3) I follow other safe-web practices (e.g. not storing history, deleting cookies, caches and other data from the browser at the close of each session, blocking tracking cookies using anti-tracking tools in the browser). The combination is no guarantee, of course, but between them I am reasonably protected.
FLoC may be good, bad or indifferent from a privacy standpoint. However, the two browsers I use (Firefox and Edge) are both distributed by companies (Microsoft and Mozilla) that have declined to implement FLoC, so the issue is not currently something that affects either browser.