Examine source code of User Script API Gateway

{
  "manifest_version": 3,
  "name": "User Script API Gateway",
  "version": "1.0",
  "description": "Allows users to inject custom scripts that can fetch data from any domain, with controlled CSP.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "scripting"
  ],
  "optional_permissions": [
    "userScripts"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "writephudat@your-domain.com",
      "strict_min_version": "109.0"
    }
  }
}