Examine source code of FocusGuard Plus

{
  "manifest_version" : 2 ,
  "name" : "__MSG_extensionName__" ,
  "version" : "1.0",
  "description" : "__MSG_extensionDescription__" ,
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "browser_action" : {
    "default_popup" : "popup/popup.html",
    "default_icon" : "icons/icon48.png"
  },
  "permissions" : [
    "storage" ,
    "activeTab" ,
    "tabs" ,
    "alarms" ,
    "notifications" ,
    "webRequest" ,
    "webRequestBlocking" ,
    "https://*/*" ,
    "http://*/*" 
  ],
  "background" : {
    "scripts" : [
      "background.js" 
    ],
    "persistent" : true 
  },
  "options_ui" : {
    "page": "options/options.html" ,
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bb4b1b6-b121-4b5c-9b07-dfc7039e1b1e}"
    }
  }
}