Google is rolling out a new feature called “Privacy Sandbox” that also enables websites to use Google’s new “Topics API” to view web addresses in your browser history.
People are generally concerned because it allows a site like Petsmart.com to learn that you bank at WellsFargo.com and that you also visit Nickelodeon.com frequently. Petsmart may then use this information to target ads at you.
The larger concern is that just about any website can learn this information (so not just Petsmart.com, but SouthernRecipeMamaOfFour.net can also get this information, which is excessive access for a site like that to say the least). The fear is likely overblown, though.
What can you do to protect yourself? Don’t use Google products or Chromium-based web browsers.
Edit: Looks like my understanding was off. Shout out to NicoCharrua and a couple other users who clarified that Topics API doesn’t expose URLs, but instead looks at the URLs in your history to create topics (kind of like tags) that other sites can see. Hope my potential employer doesn’t find out about my love of large ethnic butts!