diff --git a/lib/frame.js b/lib/frame.js
index dfab1a9..d11c656 100644
--- a/lib/frame.js
+++ b/lib/frame.js
@@ -98,6 +98,7 @@
 			{subject: window},
 			{check, checkStack, ask: askWrapper, notify, prefs}
 		);
+		log("prepare to intercept (i)frames.");
 		
 		[window.HTMLIFrameElement, window.HTMLFrameElement].forEach(function(constructor){
 			var oldContentWindowGetter = constructor.prototype.__lookupGetter__("contentWindow");
@@ -142,13 +143,16 @@
 			enabled = false;
 		}
 		if (data.hasOwnProperty("canvasBlocker-sendNotifications") && data["canvasBlocker-sendNotifications"] === tabId){
+			log("sending notifications:", notifications);
 			browser.runtime.sendMessage({
 				sender: tabId,
 				"canvasBlocker-notifications": notifications
 			});
+			log("notifications sent");
 		}
 	});
 	
+	log("load settings");
 	browser.storage.local.get().then(function(data){
 		Object.keys(data).forEach(function(key){
 			log("loaded setting:", key, ":", data[key]);
@@ -160,6 +164,7 @@
 	browser.storage.onChanged.addListener(function(change, area){
 		if (area === "local"){
 			Object.keys(change).forEach(function(key){
+				log("setting changed:", key, ":", change[key].newValue);
 				settings[key] = change[key].newValue;
 			});
 		}