diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 9f0b097..f656636 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -86,6 +86,9 @@
 	"term_refresh": {
 		"message": "Refresh"
 	},
+	"page_opening": {
+		"message": "Opening..."
+	},
 
 	"settings_general_showApplicable": {
 		"message": "Show product's ratings in this extension's icon"