Examine source code of Codeforces Daily Tracker

{
  "manifest_version": 2,
  "name": "Codeforces Daily Tracker",
  "version": "2.0",
  "description": "Track Codeforces problems solved in the last 24 hours",
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "https://codeforces.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cf-tracker@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "optional_permissions": []
}