> <i>The Topics API works by having your browser (Chrome) ... determine topics that “represent your top interests for that week based on your browsing history.” Chrome will “leverage a classifier model to map site hostnames to topics."For each week, the user’s top 5 topics are calculated using browsing information local to the browser ...</i><p>So Google now wants to create and run browser crawlers <i>directly</i> on our machines to create individual browsing profiles, and share this with Google and other "advertising" platforms "anonymously". That's not invasive at all. /s