Examine source code of AI Chat TOC

{
  "manifest_version": 2,
  "name": "AI Chat TOC",
  "version": "1.8.0",
  "description": "Adds a Table of Contents to ChatGPT, Gemini, Perplexity, Claude, and Grok",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "*://chatgpt.com/*",
    "*://gemini.google.com/*",
    "*://www.perplexity.ai/*",
    "*://claude.ai/*",
    "*://grok.com/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "toggle-toc": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "MacCtrl+Shift+F"
      },
      "description": "Toggle Table of Contents"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://chatgpt.com/*",
        "*://gemini.google.com/*",
        "*://www.perplexity.ai/*",
        "*://claude.ai/*",
        "*://grok.com/*"
      ],
      "js": [
        "themes.js",
        "ui.js",
        "main.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ai-chat-toc@extension",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}