Examine source code of DomainKiller

{
  "manifest_version": 2,
  "name": "DomainKiller",
  "version": "0.98resigned1",
  "description": "Rozszerza możliwości zakopywania i ukrywania na portalu wykop.pl",
  "icons": {
    "48": "icons/ico-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wykop.pl/*"
      ],
      "js": [
        "thirdParty/jquery-3.2.1.min.js",
        "domainkiller.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{652e4b2f-fc12-4a91-9169-935b72bbea96}"
    }
  }
}