Or you may see an error like this when a frame ancestor url is not on the same origin (self), which would violate a frame-ancestors 'self' content security policy directive: Refused to load because it does not appear in the frame-ancestors directive of the content security policy. You might see an error message in the developer tools console such when you try to load a page in a frame, or iframe that is not allowed by the frame-ancestors policy, such as: What happens when frame-ancestors blocks something? No, the frame-ancestors does not inherit from the default-src directive, you need to explicitly specify it in your Content-Security-Policy header. Is frame-ancestors covered by the default-src directive? It must be specified as part of a Content-Security-Policy header. No, you cannot use the frame-ancestors directive from a Content-Security-Policy meta tag. Can frame-ancestors be used in a meta tag?
In addition to frame and iframe the frame-ancestors directive also applies to applet, embed and objecttags. Now suppose we want to allow and to frame our page, we can specify it with frame-ancestors like this: frame-ancestors What HTML elements does frame-ancestors apply to? Using frame-ancestors 'self' is similar to using X-Frame-Options: sameorigin In this case you can use: frame-ancestors 'self' Now suppose you want to allow a page to be framed, for example within an iframe, but only from the same site (same origin). Specifically this means that the given URI cannot be framed inside a frame or iframe tag. Using frame-ancestors 'none' is similar to using X-Frame-Options: deny. The most common way to use the frame-ancestors directive is to block a page from being framed by other pages. Using the frame-ancestors CSP directive we can block or allow a page from being placed within a frame or iframe. It should solve a problem on someone else server, but I could not reproduce his error.The frame-ancestors directive allows you to specify which parent URLs can frame the current resource. You can obtain the extension from Github. The downside is that only one domain can be targeted, as you only have one local key.Templates do not correctly pass keys and instead always use the local key.The extension does not work properly with the MobileFrontend extension.If you use the Visual Editor then iframe are not shown as code.Therefore, behind the key should only be trusted domains. The extension uses keys to select web servers which are given by the wiki administrator during installation. Again make sure that the domains that can be used in the extension are trusted! Security issue: External web pages may contain malicious code.So, make sure that the domains that can be used in the extension are trusted! Copyright violation: Embedding an external web page may violate copyrights.Embedding external webpage into MediaWiki has two issues:
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