Examine source code of XPath Element Remover b8q

{
  "manifest_version": 2,
  "name": "XPath Element Remover",
  "version": "1.0",
  "description": "Удаляет элементы на страницах по заданным XPath-выражениям.",
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "XPath Remover",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d8a5e344-270a-4593-9bc8-0349225f59f7}"
    }
  }
}