Implemented whitelist.

manifest.json

@@ -2,13 +2,16 @@
     "manifest_version": 2,
     "name": "Mango",
     "version": "1.0",
-  
     "description": "Obliterates rounded corners.",
-  
+
     "icons": {
       "48": "img/mango-48.jpg",
       "96": "img/mango-96.jpg"
     },
+
+    "default_icon": {
+      "96": "img/mango-96.jpg"
+    },
     
     "browser_specific_settings": {
         "gecko": {
@@ -21,6 +24,11 @@
         "default_title": "Mango",
         "default_popup": "mango.html"
     },
+    
+    "permissions": [
+    "storage",
+    "activeTab"
+  ],
   
     "content_scripts": [
       {