Solved, how?
The viewer is in an iframe and it seems browser security is blocking links.
How would you add a link to the PubSub auth page from the viewer iframe?
I didn’t have much luck with an anchor tag. I have to right-click and say open tab for the link to open.

When I try:
window.open('redirect.html', '_blank', 'height=200,width=200');
I get the error:
I’m just trying to link from the extension viewer to the pubsub auth page on a backend service.
https://github.com/twitchdev/pubsub-samples/blob/master/javascript/index.html