Examine source code of Saudades Pedro

{
  "name": "Saudades Pedro",
  "version": "1.1resigned1",
  "description": "Para todos que têm saudades do Pedro",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "js": [
        "jquery-3.3.1.min.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a19516bf-57f3-4184-8274-41feb27a3e2a}"
    }
  }
}