Check this box if you want to completely reset the directive to 'none' without inheriting any values from other directives.

Otherwise, if a fetch directive is unspecified, the web browser will check certain other directives for the effective value. For example, if script-src-elem is unspecified, the browser will use script-src instead. If that is also unspecified, the browser will use default-src instead.

Jenkins's internal model of Content Security Policy implements similar behavior, in that specifically allowing a scheme, domain or other value for a directive will apply in addition to what would be the fallback value. For example, Jenkins by default defines script-src but not script-src-elem. If an administrator specifies a value to be added to script-src-elem, Jenkins will apply that in addition to the value for script-src.

Checking this box disables this behavior.