diff --git a/lib/main.js b/lib/main.js
index 8da65a6..3305609 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -71,59 +71,63 @@
 	preferences.on("blackList", function(){
 		updateBlackList();
 	});
-
+	
+	function checkURL(url){
+		var url = new URL(url);
+		var mode = "block";
+		switch (prefs.blockMode){
+			case "blockEverything":
+				mode = "block";
+				break;
+			case "allowOnlyWhiteList":
+				if (whiteList.match(url)){
+					mode = "unblock";
+				}
+				else {
+					mode = "block";
+				}
+				break;
+			case "ask":
+				if (whiteList.match(url)){
+					mode = "unblock";
+				}
+				else if (blackList.match(url)){
+					mode = "block";
+				}
+				else {
+					mode = "ask";
+				}
+				break;
+			case "blockReadout":
+				if (whiteList.match(url)){
+					mode = "unblock";
+				}
+				else if (blackList.match(url)){
+					mode = "block";
+				}
+				else {
+					mode = "blockReadout";
+				}
+				break;
+			case "blockOnlyBlackList":
+				if (blackList.match(url)){
+					mode = "block";
+				}
+				else {
+					mode = "unblock";
+				}
+				break;
+			case "allowEverything":
+				mode = "unblock";
+				break;
+			default:
+				console.log("Unknown blocking mode. Default to block everything.");
+		}
+		return mode;
+	}
 	function checkWorker(worker){
 		try {
-			var url = new URL(worker.url);
-			var mode = "block";
-			switch (prefs.blockMode){
-				case "blockEverything":
-					mode = "block";
-					break;
-				case "allowOnlyWhiteList":
-					if (whiteList.match(url)){
-						mode = "unblock";
-					}
-					else {
-						mode = "block";
-					}
-					break;
-				case "ask":
-					if (whiteList.match(url)){
-						mode = "unblock";
-					}
-					else if (blackList.match(url)){
-						mode = "block";
-					}
-					else {
-						mode = "ask";
-					}
-					break;
-				case "blockReadout":
-					if (whiteList.match(url)){
-						mode = "unblock";
-					}
-					else if (blackList.match(url)){
-						mode = "block";
-					}
-					else {
-						mode = "blockReadout";
-					}
-					break;
-				case "blockOnlyBlackList":
-					if (blackList.match(url)){
-						mode = "block";
-					}
-					else {
-						mode = "unblock";
-					}
-					break;
-				case "allowEverything":
-					mode = "unblock";
-					break;
-				default:
-					console.log("Unknown blocking mode. Default to block everything.");
-			}
+			var mode = checkURL(worker.url);
 			worker.port.emit(mode, false, prefs.askOnlyOnce);
 		}
 		catch (e){