Examine source code of Funny User-Agent Console

{
  "manifest_version": 2,
  "name": "Funny User-Agent Console",
  "version": "1.0",
  "description": "In User-Agent vui nhộn vào Developer Tools Console khi mở tab mới.",
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Funny UA Console"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{484b6c28-6708-4bbd-8538-84124bb271ec}"
    }
  }
}