Examine source code of Cinemana skip button fix

{
  "manifest_version": 2,
  "name": "Cinemana skip button fix",
  "version": "2.0",
  "description": "Auto skip botton by TMK5",
  "icons": {
    "48": "/icons/cinemana.ico"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{91d21408-e67e-458d-97e7-9066784d64b8}"
    }
  }
}