Examine source code of Fing Network Tools

{
  "manifest_version": 2,
  "name": "Fing Network Tools",
  "version": "1.0",
  "description": "Simple network tools extension inspired by Fing",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8dfd3f30-3bc9-4dba-87e8-6d9819f0ecd6}"
    }
  }
}