Navigate through the frame context using JavaScript in Chrome or Firefox Console [Without Manually using the Drop down List]

Question

I am trying to extract some data from a webpage where I don't want to use Selenium. So I am using JavaScript in the chrome console, but I am facing the below problem while accessing the iframe.

blocked a frame with origin "example.com" from accessing a cross-origin frame.

I understand the cross-origin issue and have tried multiple things mentioned in other answers but nothing seem to work. The only solution I could think of is programmatically selecting the Frame context otherwise which could be done manually as shown below in the image

enter image description here

Could someone help if there is a way to change this programmatically!

These are somethings I tried

document.querySelector("iframe").contentWindow.document.querySelector(".class name")

var frame = document.querySelector("iframe").contentWindow; cd(frame)