Examine source code of WS MessagePack Inspector

{
  "manifest_version": 3,
  "name": "WS MessagePack Inspector",
  "version": "1.1.0",
  "description": "抓取 SignalR + MessagePack 二进制 WebSocket 帧，解码订阅点位与实时推送值；支持页面加载早期建立的连接。",
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "injector.js"
      ],
      "run_at": "document_start",
      "world": "MAIN",
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "bridge.js"
      ],
      "run_at": "document_start",
      "world": "ISOLATED",
      "all_frames": true
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "WS MessagePack Inspector",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}