Examine source code of Filter PbInfo

{
  "manifest_version": 3,
  "name": "Filter PbInfo",
  "version": "1.6",
  "description": "Filtreaza problemele rezolvate de pe pbinfo",
  "permissions": [],
  "host_permissions": [
    "https://www.pbinfo.ro/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.pbinfo.ro/*"
      ],
      "js": [
        "script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "filter-pbinfo@suntunaiurit.org"
    }
  }
}