Examine source code of Leetcode Daily

{
  "manifest_version": 2,
  "name": "Leetcode Daily",
  "version": "0.4",
  "description": "Launches a tab to the current leetcode daily on startup and when a new one is released (0:00 UTC); does nothing if the problem is marked completed by leetcode.",
  "icons": {
    "48": "icons/uphill-48.png",
    "96": "icons/uphill-96.png"
  },
  "permissions": [
    "*://leetcode.com/*",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{60935887-b136-49a9-be15-3f803a2af106}"
    }
  }
}