Also "unread comment highlighting" would be so good to have.

All the features I've added to this extension.

But if you want to pick one: Inline replies.

Right now, I have to do a ton of magic to make that happen in order to work around your auth flow. Namely, pulling the auth token out of the other page and then having to keep track of it in session storage.

I could delete a whole lot of code if that was just built in.