diff --git a/background.js b/background.js
index 12fd4aa..3edc103 100644
--- a/background.js
+++ b/background.js
@@ -2,51 +2,47 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-class Config {
-  constructor(config) {
-    this.config = config
-  }
-
-  set(value) {
-    this.config = {...this.config, ...value}
-  }
-
-  get(key) {
-    return key ? this.config[key] : this.config
-  }
-}
 // initial
-const config = new Config({
-  listenDomain: [],
-  syncURL: ''
-})
-
-chrome.storage.sync.get(['listenDomain', 'syncURL'], value => config.set(value))
+const config = {
+    listenDomain: [],
+    syncURL: ''
+}
 
-// register listener
-chrome.cookies.onChanged.addListener(function(info) {
-  const {cause, cookie: {domain, name, path, value}, removed} = info
-  if(config.get('listenDomain').includes(domain) && removed === false && cause === 'explicit') {
-    chrome.cookies.set({
-      url: config.get('syncURL'),
-      name,
-      value,
-      path,
-    }, msg => console.log('sync success:', msg))
-  }
+// get config from chrome.storage
+chrome.storage.sync.get(['listenDomain', 'syncURL'], ({ listenDomain = [], syncURL = '' }) => {
+    config.listenDomain = listenDomain
+    config.syncURL = syncURL
 })
 
-// msg handler
-chrome.extension.onConnect.addListener(function(port) {
-  port.onMessage.addListener(function({ type, payload }) {
-    if (type === 'initial') {
-      config.set(payload)
-      chrome.notifications.create(null, {
+// update config
+chrome.storage.onChanged.addListener(function({ listenDomain, syncURL }) {
+    if (listenDomain) {
+        config.listenDomain = listenDomain.newValue
+    }
+    if (syncURL) {
+        config.syncURL = syncURL.newValue
+    }
+
+    // notify
+    chrome.notifications.create(null, {
         type: 'basic',
         iconUrl: 'icon.png',
         title: 'Setting Successfully',
-        message: `Now Listening: ${payload.listenDomain.join(', ')}`,
-      });
+        message: `Now Listening: ${config.listenDomain.join(', ')}`,
+    })
+})
+
+console.log("listen")
+// register cookies listener
+chrome.cookies.onChanged.addListener(function(info) {
+    const {cause, cookie: {domain, name, path, value}, removed} = info
+    console.log(domain, config.listenDomain, "config.listenDomain")
+    if(config.listenDomain.includes(domain) && removed === false && cause === 'explicit') {
+        chrome.cookies.set({
+            url: config.syncURL,
+            name,
+            value,
+            path,
+        }, msg => console.log('sync success:', msg))
     }
-  })
 })
diff --git a/manifest.json b/manifest.json
index 56f1e33..7a175c6 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,8 +1,8 @@
 {
   "name": "Auto Sync Cookie",
   "description": "listen and sync Cookie to target domain.",
-  "version": "0.1",
-  "permissions": ["tabs", "http://*/*", "https://*/*", "storage", "cookies", "notifications"],
+  "version": "0.2",
+  "permissions": ["storage", "cookies", "<all_urls>", "notifications"],
   "icons": { "16": "icon.png", "48": "icon.png", "128": "icon.png" },
   "browser_action": {
       "default_title": "Listen & Sync Cookie to target domain.",
diff --git a/popup.js b/popup.js
index 15e2215..ead1dc4 100644
--- a/popup.js
+++ b/popup.js
@@ -2,28 +2,29 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-const port = chrome.extension.connect();
-
-document.addEventListener('DOMContentLoaded', function() {
+document.addEventListener('DOMContentLoaded', function(){
   const ls = document.querySelector('#listen-domain')
   const sy = document.querySelector('#sync-url')
   const syncBtn = document.querySelector('#save-btn')
 
-  chrome.storage.sync.get(['listenDomain', 'syncURL'], ({ listenDomain, syncURL }) => {
-    ls.value = listenDomain.join('\n') || ''
-    sy.value = syncURL || ''
-  })
+  // backfill config
+  chrome.storage.sync.get(
+      ['listenDomain', 'syncURL'],
+      ({ listenDomain = [], syncURL = '' }) => {
+        ls.value = listenDomain.join('\n')
+        sy.value = syncURL
+      }
+  )
 
+  // set new config
   syncBtn.onclick = () => {
     const listenDomain = ls.value.trim().split(/\n/)
     const syncURL = sy.value.trim()
     if (listenDomain && syncURL) {
       chrome.storage.sync.set({ listenDomain, syncURL })
-      port.postMessage({
-      	type: 'initial',
-      	payload: { listenDomain, syncURL }
-      })
     }
   }
 
 })
+
+