Examine source code of Pantalla-Completa

{
  "manifest_version": 3,
  "name": "Pantalla Completa",
  "version": "1.2",
  "description": "Activa o desactiva la pantalla completa con un boton, el cual podrás colocar donde más te acomode.",
  "permissions": [
    "scripting",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Pantalla Completa",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "96": "icon96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icon96.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "PantallaCompleta@LuisCerna"
    }
  }
}