Examine source code of Password Generator D3

{
  "manifest_version": 3,
  "name": "Password Generator",
  "version": "1.0",
  "description": "A simple password generator with customizable options",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [],
  "author": "Dhaval Dadhaniya",
  "homepage_url": "https://dhavald3.github.io/",
  "offline_enabled": true,
  "short_name": "PassGen",
  "browser_specific_settings": {
    "gecko": {
      "id": "password-generator@dhavald3.github.io",
      "strict_min_version": "109.0"
    }
  }
}