Examine source code of showIP_window

{
  "name": "showIP_window",
  "author": "Yang",
  "version": "1.0.3",
  "manifest_version": 2,
  "description": "创建一个window显示当前PC外网IP地址",
  "icons": {
    "16": "resource/img/16x16.png",
    "32": "resource/img/32x32.png",
    "48": "resource/img/48x48.png",
    "64": "resource/img/64x64.png",
    "128": "resource/img/128x128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "resource/img/16x16.png",
      "32": "resource/img/32x32.png",
      "48": "resource/img/48x48.png",
      "64": "resource/img/64x64.png",
      "128": "resource/img/128x128.png"
    },
    "default_title": "显示当前PC外网IP地址"
  },
  "commands": {},
  "background": {
    "scripts": [
      "resource/js/background.js"
    ],
    "type": "module",
    "persistent": true
  },
  "web_accessible_resources": [
    "resource/*"
  ],
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "activeTab",
    "downloads",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "temp@addon.id"
    }
  }
}