Examine source code of YouTube Shorts Block Secure

{
  "manifest_version": 3,
  "name": "YouTube Shorts Blocker",
  "version": "1.1.0",
  "description": "Blocks YouTube Shorts — redirects /shorts/ URLs to a block page and hides Shorts sections.",
  "permissions": [
    "declarativeNetRequest",
    "webNavigation",
    "tabs"
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "shorts_rules",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "blocked.html"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ],
      "extension_ids": []
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-shorts-blocker@semikurt",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  }
}