Examine source code of Google URL Extractor

{
  "manifest_version": 2,
  "name": "Google URL Extractor",
  "description": "Quickly extracts the key components of a Google search URL for easier access and use",
  "version": "1.2.1",
  "icons": {
    "64": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "page_action": {
    "default_icon": {
      "64": "icons/icon.png"
    },
    "default_title": "Google Search Url Extractor"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{01669f66-6c93-4d0e-afba-3b024eaf2f06}"
    }
  }
}