Examine source code of Smart TOC V2

{
  "manifest_version": 2,
  "name": "Smart TOC V2",
  "version": "1.3",
  "description": "Generates a floating, interactive Table of Contents for any webpage with search, highlighting, and collapsible sections.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_action": {
    "default_title": "Smart TOC V2",
    "default_icon": "icons/logo_64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "toc.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1cf9addd-8946-4d33-a5da-9a5ecae7d5d8}"
    }
  }
}