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Cross-Origin Request Blocked

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Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

I have already set "security.fileuri.strict_origin_policy" to false I have already opened "" in another tab, but Firefox did not ask me to add a certificate.

This may be helpful, a warning that appeared before the one above: "Loading mixed (insecure) display content “” on a secure page"

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