Examine source code of CF Randomizer

{
  "manifest_version": 3,
  "name": "CF Randomizer",
  "version": "1.0",
  "description": "Practice unsolved Codeforces problems by topic and difficulty.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "*://codeforces.com/*"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cfrandomizer@godlshounak.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}