diff --git a/ui (gen4)/viewer.js b/ui (gen4)/viewer.js
index c547680d..1bd9439b 100755
--- a/ui (gen4)/viewer.js	
+++ b/ui (gen4)/viewer.js	
@@ -1991,6 +1991,8 @@ module.ConfigLocalStorage = ImageGridFeatures.Feature({
 		'ui',
 	],
 
+	isApplicable: function(){ return localStorage != null },
+
 	actions: ConfigLocalStorageActions,
 
 	handlers: [
@@ -4678,6 +4680,8 @@ module.URLHistoryLocalStorage = ImageGridFeatures.Feature({
 		'url-history',
 	],
 
+	isApplicable: function(){ return localStorage != null },
+
 	actions: URLHistoryLocalStorageActions,
 
 	// NOTE: loading is done by the .url_history prop...