Examine source code of Codecal

{
  "manifest_version": 3,
  "name": "Codecal",
  "version": "1.2",
  "description": "Track upcoming competitive programming contests from Codeforces, AtCoder, CodeChef, and more.",
  "action": {
    "default_popup": "popup.html",
    "default_title": "Codecal",
    "default_icon": {
      "128": "icon.png"
    }
  },
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6c9b3b1-2a4e-4f1b-8e2d-9c3f5a7b8e1d}",
      "strict_min_version": "109.0"
    }
  },
  "host_permissions": [
    "https://tukitaki.vercel.app/*"
  ],
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ]
}