diff --git a/lib/settingContainers.js b/lib/settingContainers.js
index 7d069e4..360caa4 100644
--- a/lib/settingContainers.js
+++ b/lib/settingContainers.js
@@ -40,6 +40,7 @@
 			let newEntry = {url};
 			newEntry[name] = value;
 			urlContainerValue.push(newEntry);
+			initializeUrlSetting(newEntry);
 			matching = [newEntry];
 		}
 		matching[0][name] = value;
@@ -164,51 +165,53 @@
 		}
 	};
 	
+	function initializeUrlSetting(urlSetting){
+		let regExp;
+		const domain = !!urlSetting.url.match(/^[A-Za-z0-9_.-]+$/);
+		if (domain){
+			regExp = new RegExp(
+				"(?:^|\\.)" + urlSetting.url.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "\\.?$",
+				"i"
+			);
+		}
+		else {
+			regExp = new RegExp(urlSetting.url, "i");
+		}
+		const match = function(url){
+			if (!url){
+				return false;
+			}
+			else if (
+				url instanceof String ||
+				(typeof url) === "string"
+			){
+				return url === urlSetting.url;
+			}
+			else if (domain){
+				return (url.hostname || "").match(regExp);
+			}
+			else {
+				return url.href.match(regExp);
+			}
+		};
+		Object.defineProperty(
+			urlSetting,
+			"match",
+			{
+				enumerable: false,
+				writable: true,
+				configurable: true,
+				value: match
+			}
+		);
+	}
+	
 	scope.initializeUrlContainer = function(eventHandler){
 		if (!scope.urlContainer){
 			return;
 		}
 		scope.urlContainer.on(function({newValue, oldValue}){
-			newValue.forEach(function(urlSetting){
-				let regExp;
-				const domain = !!urlSetting.url.match(/^[A-Za-z0-9_.-]+$/);
-				if (domain){
-					regExp = new RegExp(
-						"(?:^|\\.)" + urlSetting.url.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "\\.?$",
-						"i"
-					);
-				}
-				else {
-					regExp = new RegExp(urlSetting.url, "i");
-				}
-				const match = function(url){
-					if (!url){
-						return false;
-					}
-					else if (
-						url instanceof String ||
-						(typeof url) === "string"
-					){
-						return url === urlSetting.url;
-					}
-					else if (domain){
-						return (url.hostname || "").match(regExp);
-					}
-					else {
-						return url.href.match(regExp);
-					}
-				};
-				Object.defineProperty(
-					urlSetting,
-					"match",
-					{
-						enumerable: false,
-						writable: true,
-						configurable: true,
-						value: match
-					}
-				);
-			});
+			newValue.forEach(initializeUrlSetting);
 			
 			const newUrls = newValue.map(function(entry){return entry.url;});
 			const oldUrls = oldValue.map(function(entry){return entry.url;});
diff --git a/releaseNotes.txt b/releaseNotes.txt
index e708dff..2efecdd 100644
--- a/releaseNotes.txt
+++ b/releaseNotes.txt
@@ -8,6 +8,7 @@ Version 1.6:
 	
 	fixes:
 		- fix message canvasBlocker-unload
+		- convenience preset did not work properly
 	
 	known issues:
 		- if a data URL is blocked the page action button does not appear