defer call to resolveResponse

lib/fetch/content/fetch.js

@@ -52,7 +52,7 @@ this.superFetch = this.superFetch || (() => {
 					resolve({ headers, status: xhrRequest.status, arrayBuffer: () => new Promise((resolve, reject) => [resolveResponse, rejectResponse] = [resolve, reject]) });
 				}
 				if (xhrRequest.readyState == XMLHttpRequest.DONE) {
-					resolveResponse(xhrRequest.response);
+					setTimeout(() => resolveResponse(xhrRequest.response), 1);
 				}
 			};
 			xhrRequest.onerror = error => {