If you still use Facebook, Katie Teague says the Off-Facebook Activity tool clears "the history of apps & websites that have shared your data" & "toggling off Future Off-FB Activity disconnects any info FB has shared from your account."
https://www.cnet.com/news/privacy/you-dont-have-to-let-facebook-track-you-across-the-web/
Original tweet : https://twitter.com/DuckDuckGo/status/1526199290246340608
@duckduckgo You guys should partner with Mozilla instead of creating a new browser. Both projects share the same goals.