Mozilla and Apple have come out against it:

• Topics API mozilla/standards-positions#622 (comment)
• The Topics API WebKit/standards-positions#111 (comment)

From what I can tell, this new thing just tracks you around the web, and then builds up a model of what you like so that advertisers can learn about you. Super, freaking creepy, and makes me really glad I don't use Chrome.

The good news is, I think we can block it by setting a header on every page, so we should do so:

https://developer.chrome.com/docs/privacy-sandbox/topics/#site-opt-out

That says we have to set:

Permissions-Policy: browsing-topics=()

Gross and annoying. I'm not sure what tools we have in Django for setting this header. If it requires a middleware, I guess we could provide that to the community as a library folks can install.