Examine source code of AiClock Extension

{
  "manifest_version": 2,
  "name": "Clock Extension",
  "version": "1.0",
  "description": "Display the current time in the browser's toolbar.",
  "icons": {
    "48": "clock-icon.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "clock-icon.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{906170ae-1967-4024-9d6c-4ca463ee2a4d}"
    }
  }
}