CORS ¶ See also https://developer.mozilla.org/en-US/docs/tag/CORS https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Simple_requests https://fediverse.org/b0rk/status/1162398648996651010?s=20 https://fediverse.org/b0rk/status/1162393308024492033?s=20