Examine source code of XBert for Xero

{
  "manifest_version": 3,
  "name": "XBert Extension",
  "description": "See your XBert alerts plus create and link tasks from anywhere.",
  "version": "5.0.6",
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f6c5870-3ac9-4a38-9b8f-1bbb803fb735}"
    }
  },
  "icons": {
    "16": "assets/images/xbert-favicon-16.png",
    "48": "assets/images/xbert-favicon-48.png",
    "128": "assets/images/xbert-favicon-128.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": "assets/images/xbert-favicon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs",
    "cookies",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "*://*/*"
  ]
}