Examine source code of WebStats v2

{
  "manifest_version": 2,
  "name": "WebStats",
  "version": "1.0",
  "description": "Get in-depth traffic and engagement stats for any website with a single click.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{78aa6dba-537c-4ec7-808e-eac712af64bc}"
    }
  }
}