Examine source code of CF Performance Mirror

{
  "manifest_version": 3,
  "name": "CF Performance Mirror",
  "short_name": "CF Mirror",
  "description": "Analyze overall performance, solve time, failure rates, rating changes and errors by division and time range.",
  "version": "1.0.24.77",
  "browser_specific_settings": {
    "gecko": {
      "id": "cfmirror@perxeusss",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://codeforces.com/profile/*",
        "https://*.codeforces.com/profile/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "host_permissions": [
    "https://codeforces.com/*",
    "https://*.codeforces.com/*"
  ]
}