Examine source code of Koora Live adBlock

{
  "browser_specific_settings": {
    "gecko": {
      "id": "koora-live-adblock@hotmail.com"
    }
  },
  "manifest_version": 2,
  "name": "koora-live-adblock",
  "version": "1.1",
  "description": "Remove any garbage ruining the user experience in Koora live websites",
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "js": [
        "main.js"
      ],
      "run_at": "document_end",
      "matches": [
        "https://es.kooora-live.io/*",
        "https://m.kooora-live.io/*",
        "https://kora.livekoora.info/*",
        "https://ar.kooora-liv.com/*",
        "https://1koora.live-kora.net/*",
        "https://93koora.alkoora.live/*",
        "https://kora.online-kora.tv/*",
        "https://www.kora-lives.com/*",
        "https://4k.kora-live.live/*",
        "https://m.kora-live.info/*",
        "https://stad.yalla-shoot-tv.live/koora-live/*",
        "https://lives.kora-live.co/*",
        "https://koora-live.tv/koora-live-2/*",
        "https://www.okkora-live.com/*",
        "https://kora4lives.koora4live.co/*",
        "https://rk.live-kooora.tv/*",
        "https://www.kooralive.app/*"
      ]
    }
  ]
}