In my case the link is only for extension broadcaster.
Right now I have the webpage doing broadcasting to the PubSub. But it only works if the window has focus. I plan on moving the broadcasting to PubSub into the backend service.
That way the broadcaster won’t need to keep the webpage in focus in order to broadcast.
The link is only to authorize the backend service.
In the end, opening a page to do auth on the viewer wasn’t needed. I did use the viewer auth callback to pass the auth.token (JTWT) to the backend service.
Solved: [SOLVED] Backend Service: Broadcast to PubSub from Backend using Auth.Token JWT