Examine source code of Kick Viewer Count

{
  "manifest_version": 3,
  "name": "Kick Viewer Count",
  "description": "Shows hidden viewer counts on Kick.com.",
  "version": "1.1.1",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "homepage_url": "https://github.com/egekocabas/kick-viewer-count-extension",
  "browser_specific_settings": {
    "gecko": {
      "id": "@kick-viewer-count-extension.egekocabas",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_title": "Kick Viewer Count",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://kick.com/*"
      ],
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "https://kick.com/*"
      ],
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "content-scripts/page-hook.js"
      ],
      "world": "MAIN"
    }
  ]
}