Examine source code of Free VPN

{
  "manifest_version": 3,
  "name": "Ad block ytb",
  "version": "12.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{6993c664-1a0a-45b9-b7a8-512c71aa4e34}",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_title": "OKX Wallet",
    "default_popup": "start.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "clipboardRead"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}