Authentication within an iFrame on a Chrome Extension

Hi, I have a specific setup for my application that I’m wondering if Auth0 would be able to support, and what the best setup is.

I have an application running on my domain:

I want to create a chrome extension that takes over the newtab screen, but have that nest my domain inside an iframe. So the newtab window would just have something like this:
<iframe src= />, and that’s all.

How would I go about getting that set up? There isn’t really a ‘domain’ or anything on the newtab page, but somehow I need that to either share cookies or something with my actual domain.

Any guides and help would be great, as I’m currently evaluating auth vendors.

My app is a react application which talks to a python API backend.