Examine source code of HTML Search

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "HTML Search",
  "description": "Highlight, focus, select, and scroll through HTML elements by CSS selector",
  "browser_specific_settings": {
    "gecko": {
      "id": "htmlSearch@cubeleco"
    }
  },
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon.svg"
  },
  "options_ui": {
    "page": "pages/options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "defaults.js",
        "search.js"
      ],
      "css": [
        "search.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage"
  ]
}