Examine source code of Youtube Grid Layout Customizer

{
  "manifest_version": 3,
  "name": "YouTube Grid Customizer",
  "version": "0.6.0",
  "description": "YouTubeの一覧表示をカスタマイズします。表示列数を増やし、特定の文字を含む動画を非表示にし、検索結果を多く表示します。",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-grid-customizer@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "page-bridge.js"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "YouTube Grid Customizer",
    "default_popup": "options.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  }
}