I faced issue with SharedArrayBuffer enabling in Desktop borwser As described here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer I can choose between require-corp and credentialless value *** Cross-Origin-Embedder-Policy with require-corp or credentialless as value (protects victims from your origin) *** But SharedArrayBuffer starts working only with require-corp and in the same time other browsers (chrome based) enable SharedArrayBuffer with credentialless Tell me if there are other reasons of disabling this feature, maybe by other headers