Examine source code of Postman Helper

{
  "manifest_version": 2,
  "name": "Postman Helper",
  "version": "1.0.0",
  "description": "A minimal Firefox WebExtension (manifest v2) that helps opening Postman Web and copying the current tab URL to clipboard.",
  "permissions": [
    "tabs",
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "browser_action": {
    "default_title": "Postman Helper",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60fa2573-bc65-4b43-93fd-3ceb84e9432d}"
    }
  }
}