Examine source code of F1 Session Countdown

{
  "manifest_version": 3,
  "name": "F1 Session Countdown",
  "description": "Displays F1 session countdown as a pop-up.",
  "version": "1.3.0",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_title": "F1 Countdown"
  },
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "ical.min.js",
        "f1.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "f1count@silentdragoon.github.io"
    }
  }
}