Every webpage deserves to be a place
What I like about multiplayer cursors, cursor chat, and shared highlighting is that it’s like the opposite of a feature...
It’s not differentiation. It wouldn’t dilute me if you did it too. (But it shouldn’t be a browser feature, it’s part of the site, it’s me designing the vibe for this particular place.)
It doesn’t stand out. If there’s nobody else on this site you wouldn’t even notice.
It should be everywhere. It’s how the web should be.