Examine source code of Medium to Markdown

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.0.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "medium-md@linecode.pro",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "downloads",
    "storage",
    "notifications",
    "tabs",
    "nativeMessaging",
    "clipboardWrite"
  ],
  "host_permissions": [
    "https://medium.com/*",
    "https://*.medium.com/*",
    "https://miro.medium.com/*",
    "https://cdn-images-1.medium.com/*"
  ],
  "background": {
    "scripts": [
      "zip.js",
      "background.js"
    ]
  },
  "action": {
    "default_title": "__MSG_actionTitle__",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://medium.com/*",
        "https://*.medium.com/*"
      ],
      "js": [
        "turndown.js",
        "converter.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}