Document and/or determine recommendations around various Chrome Privacy Sandbox features

[rocodes]

Describe the change

Document changes needed to landing pages and / or to user behaviour with respect to Google Topics https://chromestatus.com/feature/5680923054964736 aka FLoC 2.0 and with Adsense/ Protected Audience API

How will this impact SecureDrop users?

• Privacy considerations for users browsing to clearnet websites related to whistleblowing
• Permissions Policy additions: browsing-topics=(), run-ad-auction=(), join-ad-interest-group=()

Additional context

https://developer.chrome.com/en/docs/privacy-sandbox/topics/#site-opt-out https://support.google.com/adsense/answer/12570693?hl=en