Use at your own risk. This disables the Content-Security-Policy header for a tab. Use this when testing what resources a new third-party tag includes onto the page. Click the extension icon to disable Content-Security-Policy header for the tab. Click the extension icon again to re-enable Content-Security-Policy header. Use this only as a last resort. Disabling Content-Security-Policy 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 Content-Security-Policy 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.