Examine source code of fireme-history

{
  "manifest_version": 2,
  "name": "fireme-history",
  "version": "0.2.0",
  "description": "Página para ver, buscar y borrar historial con estilo Chrome en Zen.",
  "permissions": [
    "history"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fireme-history@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_title": "Abrir historial estilo Chrome"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "history.html",
    "open_in_tab": true
  },
  "commands": {
    "open-history": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Abrir historial estilo Chrome"
    }
  }
}