Examine source code of GAT Plus

{
  "manifest_version": 2,
  "name": "GAT+",
  "version": "2.0.5",
  "description": "Plugin complementar para o sistema GAT.",
  "browser_specific_settings": {
    "gecko": {
      "id": "tempo-critico-atendepr@programnetwork.com.br",
      "strict_min_version": "100.0"
    }
  },
  "icons": {
    "48": "GAT+/img/icon-48.png",
    "128": "GAT+/img/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "alarms",
    "webNavigation",
    "activeTab",
    "https://api.gat.programnetwork.com.br/*",
    "https://gat.programnetwork.com.br/*",
    "https://dev.programnetwork.com.br/*",
    "https://atendepr.com.br/*"
  ],
  "background": {
    "scripts": [
      "GAT+/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Clique para configurar.",
    "default_popup": "GAT+/index.html",
    "default_icon": {
      "48": "GAT+/img/icon-48.png",
      "128": "GAT+/img/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.habilitacao.detran.pr.gov.br/*",
        "https://www.veiculo.detran.pr.gov.br/*",
        "https://www.geproc.pr.gov.br/*",
        "https://www.google.com/*"
      ],
      "js": [
        "detran/serviços_detran.js",
        "detran/main.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://gat.programnetwork.com.br/*",
        "https://dev.programnetwork.com.br/*",
        "http://localhost/*"
      ],
      "js": [
        "GAT+/detect.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://atendepr.com.br/*"
      ],
      "exclude_matches": [
        "https://atendepr.com.br/host-admon-seguridad/gestao-atendimento-fullscreen/monitor-senhas-tela-cheia*",
        "https://atendepr.com.br/host-admon-seguridad/gestao-atendimento-fullscreen/pesquisa-satisfacao*"
      ],
      "css": [
        "atendePR/styles/main.css"
      ],
      "js": [
        "atendePR/main.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://atendepr.com.br/host-admon-seguridad/gestao-atendimento/atender-senhas"
      ],
      "js": [
        "atendePR/assistant.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "atendePR/alerta.html",
    "atendePR/alerta.js",
    "atendePR/assistant.js",
    "GAT+/img/unnamed.png",
    "atendimento/widget.html",
    "atendimento/widget.css",
    "atendimento/widget.js",
    "global/images/logo_cbv.png",
    "global/fonts/JetBrainsMono.ttf",
    "global/fonts/JetBrainsMono-Bold.ttf"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self';"
}