Examine source code of Password generator

{
  "manifest_version": 3,
  "name": "__MSG_manifest_name__",
  "description": "__MSG_manifest_description__",
  "version": "5.1.8",
  "icons": {
    "16": "/icons/16.png",
    "32": "/icons/32.png",
    "48": "/icons/48.png",
    "128": "/icons/128.png",
    "1024": "/icons/1024.png"
  },
  "author": "__MSG_manifest_author__",
  "homepage_url": "https://github.com/xfox111/PasswordGeneratorExtension",
  "default_locale": "en",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "passwordgenerator@xfox111.net",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_title": "Password generator",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  }
}