Examine source code of HL ad remover

{
  "manifest_version": 3,
  "name": "HL ad remover",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@hl-lol.de"
    }
  },
  "description": "Automatically removes all divs with potential nazi ads on hl-live.de and its subpages.",
  "permissions": [
    "activeTab"
  ],
  "host_permissions": [
    "https://*.hl-live.de/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.hl-live.de/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ]
}