diff --git a/data/options.css b/data/options.css
index 389cb42..c6bd61e 100644
--- a/data/options.css
+++ b/data/options.css
@@ -2,6 +2,10 @@ setting[pref-name="showNotifications"] {
 	border-bottom: 0px transparent none;
 	padding-top: 0.5em;
 }
+setting[pref-name="notificationDisplayTime"]{
+	border-top: 0px transparent none;
+	border-bottom: 0px transparent none;
+}
 setting[pref-name="ignoreList"]{
 	border-top: 0px transparent none;
 	padding-bottom: 0.5em;
diff --git a/lib/main.js b/lib/main.js
index 4c2b352..0380951 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -24,6 +24,9 @@
 		setShow: function(value){
 			prefs.showNotifications = value;
 			prefService.set("extensions.CanvasBlocker@kkapsner.de.showNotifications", prefs.showNotifications);
+		},
+		displayTime: function(){
+			return prefs.notificationDisplayTime;
 		}
 	};
 	
diff --git a/lib/notifications.js b/lib/notifications.js
index aab433e..4f05e68 100644
--- a/lib/notifications.js
+++ b/lib/notifications.js
@@ -7,6 +7,7 @@
 
 var URL = require("sdk/url").URL;
 const {parseErrorStack} = require("./callingStack");
+const {setTimeout, clearTimeout} = require("sdk/timers");
 
 var tabUtils = require("sdk/tabs/utils");
 exports.notify = function({url, errorStack, messageId}, {lists, notificationPref, _, browser, window}){
@@ -35,9 +36,7 @@ exports.notify = function({url, errorStack, messageId}, {lists, notificationPref
 		var notification = notifyBox.getNotificationWithValue("fake-readout");
 		if (notification){
 			notification.label = message;
-			notification.url = url;
-			notification.domain = domain;
-			notification.callingStackMsg = callingStackMsg;
+			clearTimeout(notification.hideTimeout);
 		}
 		else {
 			var buttons = [
@@ -116,10 +115,17 @@ exports.notify = function({url, errorStack, messageId}, {lists, notificationPref
 				priority,
 				buttons
 			);
-			notification.url = url;
-			notification.domain = domain;
-			notification.callingStackMsg = callingStackMsg;
 		}
+		notification.url = url;
+		notification.domain = domain;
+		notification.callingStackMsg = callingStackMsg;
+		var displayTime = notificationPref.displayTime();
+		if (displayTime){
+			notification.hideTimeout = setTimeout(function(){
+				notification.close();
+			}, displayTime * 1000);
+		}
+		
 		return notification;
 	}
 };
diff --git a/locale/de-DE.json b/locale/de-DE.json
index d3897f4..69721fd 100644
--- a/locale/de-DE.json
+++ b/locale/de-DE.json
@@ -55,6 +55,8 @@
 	"showCompleteCallingStack_title": "Kompletten Aufrufestack anzeigen",
 	"showNotifications_description": "Benachrichtigungen anzeigen, wenn der Blockiermodus auf \"Auslese-API vortäuschen\" gesetzt ist.",
 	"showNotifications_title": "Benachrichtigungen anzeigen",
+	"notificationDisplayTime_description": "Anzahl Sekunden, die die Benachrichtigungen anzeigen werdne sollen. (Null eingeben, um die Benachrichtigungen nicht automatisch zu schließen.)",
+	"notificationDisplayTime_title": "Benachrichtigungsanzeigezeit",
 	"sourceOutput": "Aufrufende Datei",
 	"stackEntryOutput": "{url} Zeile {line} Spalte {column}",
 	"stackList_description": "JS-Dateien, die die <canvas>-API verwenden dürfen. Die Angabe muss hier im JSON-Format vorliegen. Beispiel: [{\"url\": \"http://domain/datei1.js\"}, {\"url\": \"http://domain/datei2.js\", \"line\": 1, \"column\": 4, \"stackPosition\": -3}]",
diff --git a/locale/en-US.json b/locale/en-US.json
index 0900946..d0ed0aa 100644
--- a/locale/en-US.json
+++ b/locale/en-US.json
@@ -55,6 +55,8 @@
 	"showCompleteCallingStack_title": "Display complete calling stack",
 	"showNotifications_description": "Show a notification when the block mode is set to \"fake readout API\".",
 	"showNotifications_title": "Show notifications",
+	"notificationDisplayTime_description": "Number of seconds the notifications are shown. (Enter zero to disable automatic closing.)",
+	"notificationDisplayTime_title": "Notification display time",
 	"sourceOutput": "Calling file",
 	"stackEntryOutput": "{url} line {line} column {column}",
 	"stackList_description": "JS files which are allowed to use the <canvas>-API. The input has to be in JSON format. Example: [{\"url\": \"http://domain/file1.js\"}, {\"url\": \"http://domain/file2.js\", \"line\": 1, \"column\": 4, \"stackPosition\": -3}]",
diff --git a/package.json b/package.json
index 424b9f8..11c0023 100644
--- a/package.json
+++ b/package.json
@@ -100,6 +100,12 @@
 			"type": "bool",
 			"value": true
 		},
+		{
+			"name": "notificationDisplayTime",
+			"title": "notification display time",
+			"type": "integer",
+			"value": 30
+		},
 		{
 			"name": "ignoreList",
 			"title": "Ignore list",