Examine source code of Url Pocket

{
  "description": "it is an extension use to lead tracks",
  "manifest_version": 2,
  "version": "1.0",
  "name": "Leads Tracker",
  "action": {
    "default_popup": "index.html",
    "default_icon": "./icon.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bc9aa82-77f4-45c8-992a-07b16e73dcf8}"
    }
  }
}