Examine source code of YouTube Classic

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "short_name": "YT Classic",
  "description": "__MSG_appDesc__",
  "version": "2026.6.3",
  "author": "Adam Lui",
  "homepage_url": "https://ytclassic.com",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "action": {},
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "components/*",
        "lib/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@ytclassic.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}