nostr:npub1alpha9l6f7kk08jxfdaxrpqqnd7vwcz6e6cvtattgexjhxr2vrcqk86dsn built a Chrome browser extension that adds a forum to every website on the internet.

https://satcom.app/

It's also open source:

https://github.com/jinglescode/web-content-conversation

Bit-aloo who's working on https://gitlab.com/walletscrutiny/nostr-opinion-plugin just sent me the link. Digging into it to see if there is some synergies or standards to be developed.