Hi,
not directly spoofing, but some possible improvement. Sites can set an x-frame-options header to disable the site from being displayed within a frame. Would be cool if there would be an option in Chameleon directly to disable these headers.
This already exists in a standalone extension:
https://github.com/ThomazPom/Moz-Ext-Ignore-X-Frame-Options/blob/b5f01a048d5b95f04ee5dd90f2cc94e083d239f1/background.js#L4C1-L5C40
Greetz