Ok, one console csp message that may be relevant. Was comparing between chrome and firefox.
Firefox has a csp warning message related to iframes, which the extension is loaded in, thinking it is related, the message is:
Content Security Policy: Ignoring ‘x-frame-options’ because of ‘frame-ancestors’ directive.
I’m currently googling about csps and what not. Does anyone have any experience with content security policies interfering with their extensions, any troubleshooting tips or suggestions?