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"
    }
  }
}