This is a fork of Phil Grayson's extension with the only difference being that this one disables the headers by default. Original: https://www.crxsoso.com/webstore/detail/disable-content-security/ieelmcmcagommplceebfedjlakkhpden Use at your own risk. Disables the current page's Content Security Policy. Useful when testing what resources a new third-party tag includes onto the page. Click the extension icon to re-enable CSP headers. Click the extension icon again to disable CSP headers. Use this only as a last resort. Disabling CSP means disabling features designed to protect you from cross-site scripting. Prefer to use report-uri which instructs the browser to send CSP violations to a URI. That allows you keep CSP enabled in your browser but still know what got blocked. https://report-uri.com is a free tool that gives you a web interface to inspect CSP violations on your site.