I found the Extension after hours of searching and finally finding this post.  His original request was to have this option in the Admin tab, not as an extension.  If it must be an extension, I'd like to see it include all the header options,  Like:

• Content-Security-Policy
• Feature-Policy
• HSTS
• Referrer-Policy
• X-Content-Type-Options
• X-Frame-Options
• X-XSS-Protection

Thanks