minor refactoring

extension/core/content/content-download.js

@@ -31,12 +31,11 @@
 		removeEventListener("message", listener, false);
 		const [filename, content] = JSON.parse(event.data);
 		const link = document.createElement("a");
-		document.body.appendChild(link);
 		link.download = filename;
-		const url = URL.createObjectURL(new Blob([content], { type: "text/html" }));
-		link.href = url;
+		link.href = URL.createObjectURL(new Blob([content], { type: "text/html" }));
+		document.body.appendChild(link);
 		link.dispatchEvent(new MouseEvent("click"));
-		URL.revokeObjectURL(url);
+		URL.revokeObjectURL(link.href);
 	}
 
 })();