Examine source code of Search text of element

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "2.8",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "search_elements_text@utb.dip.jp",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "16": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "permissions": [
    "menus",
    "activeTab",
    "scripting",
    "search",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}