Examine source code of YT Transcript Grabber

{
  "manifest_version": 2,
  "name": "YT Transcript Grabber",
  "version": "1.0.1",
  "description": "Scrapes the YouTube transcript panel and copies it to clipboard or downloads as JSON.",
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-transcript-grabber@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "downloads"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/watch*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "YT Transcript Grabber",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  }
}