You can disable it from about:config "security.csp.enable" but note that this reduces the security of your browser, you can research online what CSP does exactly.How do you disable CSP? Duck.ai works with Waterfox and LibreWolf. Does that mean that those browsers do not have CSP?
Waterfox and LibreWolf also have it as it's a standard part of modern browsers, but perhaps implemented differently in some aspects from Pale Moon.