CSP: manifest-src

The HTTP Content-Security-Policy: manifest-src directive specifies which manifest can be applied to the resource.

CSP version	3
Directive type	Fetch directive
`default-src` fallback	Yes. If this directive is absent, the user agent will look for the `default-src` directive.

Syntax

One or more sources can be allowed for the manifest-src policy:

Content-Security-Policy: manifest-src <source>;
Content-Security-Policy: manifest-src <source> <source>;

<source> can be any one of the values listed in CSP Source Values.

Note that this same set of values can be used in all fetch directives (and a number of other directives).

Given this CSP header:

Content-Security-Policy: manifest-src https://example.com/

The following <link> is blocked and won't load:

<link rel="manifest" href="https://not-example.com/manifest" />

Specification
Content Security Policy Level 3 # directive-manifest-src

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`manifest-src`	Yes	79	41	No	Yes	No	Yes	Yes	41	Yes	No	Yes