Examine source code of YouTube TLDW;

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "version": "1.1.1",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-tldw@sebastienmouret.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "https://*.youtube.com/*",
    "https://generativelanguage.googleapis.com/*",
    "https://api.openai.com/*",
    "https://openrouter.ai/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_action": {
    "default_title": "__MSG_extName__",
    "default_icon": "icons/icon-48.png"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    "logo.png"
  ]
}