Examine source code of Platzi Full Mode

{
  "manifest_version": 2,
  "name": "Platzi Full Mode",
  "description": "Mueve la barra de aportes para que tengas mayor campo de visión del video.",
  "version": "0.0.5",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "/icons/icon16.png",
    "32": "/icons/icon32.png",
    "48": "/icons/icon48.png",
    "128": "/icons/icon120.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon32.png",
    "default_title": "Platzi Full Mode",
    "default_popup": "popup/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://platzi.com/clases/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "platzifullvideo@edevars.com",
      "strict_min_version": "48.0"
    }
  }
}