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Most popular variants of the header value (we only show this when there's just a bunch of variants):
Content Security Policy is used by a web server to declare a list of trusted content types (images, scripts, media etc) and origins from which they can be safely loaded as intended by the website authors. The
Content-Security-Policy-Report-Only header instruct the browser to enable CSP in "report-only" mode where no content blocking is enforced and would-be-blocked origins are reported allowing website authors to fine-tune the policy.
We have seen 0 websites setting the
Content-Security-Policy-Report-Only HTTP header and 0 unique values of this header.