Examine source code of Ad Blocker

{
  "manifest_version": 3,
  "name": "YouTube AD Blocker",
  "description": "Block ads on YouTube",
  "version": "1.3",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{174c6ce0-6775-45b7-82b3-92105d110a4d}"
    }
  }
}