Examine source code of WebRoom

{
  "manifest_version": 3,
  "name": "WebRoom",
  "description": "Decentralized real-time presence layer for every webpage. See how many people are browsing the same page as you in real time...",
  "version": "2.4.2",
  "homepage_url": "https://github.com/devlopersabbir/webroom",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "src/content/index.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "webroom@devlopersabbir.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}