Examine source code of ChatGPT Markdown Exporter

{
  "manifest_version": 2,
  "name": "ChatGPT Markdown Exporter",
  "description": "Export ChatGPT conversations to Markdown files",
  "version": "0.2.0",
  "icons": {
    "16": "/icons/icon-16.png",
    "48": "/icons/icon-48.png",
    "128": "/icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "downloads",
    "scripting",
    "https://chatgpt.com/*",
    "https://chat.openai.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "chatgpt-markdown-exporter@devcxl.cn"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "ChatGPT Markdown Exporter",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://chat.openai.com/*",
        "https://chatgpt.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/chatgpt.js"
      ]
    }
  ]
}