Examine source code of SnowSnowAppCrafter

{
  "name": "SnowSnow",
  "description": "mady by Ilichev Platon",
  "version": "1.3",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/get_started16.png",
      "32": "/images/get_started32.png",
      "48": "/images/get_started48.png",
      "128": "/images/get_started128.png"
    }
  },
  "icons": {
    "16": "/images/get_started16.png",
    "32": "/images/get_started32.png",
    "48": "/images/get_started48.png",
    "128": "/images/get_started128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "snowextension@example.com"
    }
  }
}