diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index b0abc60..2b065b9 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -752,14 +752,6 @@
 		"message": "blinken",
 		"description": ""
 	},
-	"notificationDisplayTime_description": {
-		"message": "Anzahl der Sekunden, die die Benachrichtigungen angezeigt werden sollen. (Null eingeben, um die Benachrichtigungen nicht automatisch zu schließen.)",
-		"description": ""
-	},
-	"notificationDisplayTime_title": {
-		"message": "Benachrichtigungsanzeigezeit",
-		"description": ""
-	},
 	"sourceOutput": {
 		"message": "Aufrufende Datei",
 		"description": ""
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 47f48df..d1bd605 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -154,14 +154,6 @@
 		"description": ""
 	},
 	
-	"allowPDFCanvas_description": {
-		"message": "Firefox's native PDF reader uses canvases to display PDF content. If too many ask dialogs appear or the PDF reader does not work at all, these have to be allowed.",
-		"description": ""
-	},
-	"allowPDFCanvas_title": {
-		"message": "Allow canvases in PDFs",
-		"description": ""
-	},
 	"askForInvisiblePermission": {
 		"message": "Do you want to allow invisible <canvas>?",
 		"description": ""
diff --git a/_locales/es/messages.json b/_locales/es/messages.json
index 1b074a5..b02772c 100644
--- a/_locales/es/messages.json
+++ b/_locales/es/messages.json
@@ -626,14 +626,6 @@
 		"message": "centellear",
 		"description": ""
 	},
-	"notificationDisplayTime_description": {
-		"message": "Número de segundos que se muestran las notificaciones (introduzca un cero para desactivar el cierre automático).",
-		"description": ""
-	},
-	"notificationDisplayTime_title": {
-		"message": "Tiempo de exhibición de las notificaciones",
-		"description": ""
-	},
 	"sourceOutput": {
 		"message": "Archivo de llamada",
 		"description": ""
diff --git a/_locales/fr/messages.json b/_locales/fr/messages.json
index d919957..4cdd3c9 100644
--- a/_locales/fr/messages.json
+++ b/_locales/fr/messages.json
@@ -540,14 +540,6 @@
 		"message": "Afficher les notifications",
 		"description": ""
 	},
-	"notificationDisplayTime_description": {
-		"message": "Nombre de secondes pendant lesquelles les notifications doivent être affichées. (Zéro permet de ne pas fermer les avis automatiquement.)",
-		"description": ""
-	},
-	"notificationDisplayTime_title": {
-		"message": "Temps d'affichage des notifications",
-		"description": ""
-	},
 	"sourceOutput": {
 		"message": "Appel d'un fichier",
 		"description": ""
diff --git a/_locales/it/messages.json b/_locales/it/messages.json
index 2502e6f..ec14597 100644
--- a/_locales/it/messages.json
+++ b/_locales/it/messages.json
@@ -428,14 +428,6 @@
 		"message": "Mostra notifiche",
 		"description": ""
 	},
-	"notificationDisplayTime_description": {
-		"message": "Numero di secondi di durata della notifica. (Zero per disattivare la chiusura automatica.)",
-		"description": ""
-	},
-	"notificationDisplayTime_title": {
-		"message": "Durata della notifica",
-		"description": ""
-	},
 	"sourceOutput": {
 		"message": "File di chiamata",
 		"description": ""
diff --git a/_locales/zh_CN/messages.json b/_locales/zh_CN/messages.json
index 1739df1..019ab35 100644
--- a/_locales/zh_CN/messages.json
+++ b/_locales/zh_CN/messages.json
@@ -548,14 +548,6 @@
 		"message": "显示通知",
 		"description": ""
 	},
-	"notificationDisplayTime_description": {
-		"message": "通知显示几秒（输入 0 则禁用自动关闭通知）",
-		"description": ""
-	},
-	"notificationDisplayTime_title": {
-		"message": "通知持续时间",
-		"description": ""
-	},
 	"sourceOutput": {
 		"message": "调用文件",
 		"description": ""
diff --git a/lib/settingDefinitions.js b/lib/settingDefinitions.js
index b5ae7c1..c94da75 100644
--- a/lib/settingDefinitions.js
+++ b/lib/settingDefinitions.js
@@ -197,10 +197,6 @@
 			name: "storeImageForInspection",
 			defaultValue: false
 		},
-		{
-			name: "notificationDisplayTime",
-			defaultValue: 30
-		},
 		{
 			name: "ignoreList",
 			defaultValue: ""