Examine source code of YouTube AdSkipper Fast

{
  "description": "This Firefox add-on helps you experience YouTube without annoying ads. You can watch videos without having to wait or click away unwanted ads.",
  "manifest_version": 2,
  "name": "YouTube AdSkipper",
  "version": "1.0",
  "homepage_url": "https://donovan.v6.rocks",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "aftBlock.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d9b27d0-c6e5-4ebe-aa77-eeb83d8b23f5}"
    }
  }
}