readonly (#28243)

editor/js/Storage.js

@@ -50,7 +50,7 @@ function Storage() {
 
 		get: function ( callback ) {
 
-			const transaction = database.transaction( [ 'states' ], 'readwrite' );
+			const transaction = database.transaction( [ 'states' ], 'readonly' );
 			const objectStore = transaction.objectStore( 'states' );
 			const request = objectStore.get( 0 );
 			request.onsuccess = function ( event ) {