diff --git a/Tiefsee/Program.cs b/Tiefsee/Program.cs
index ae16395..63862d9 100644
--- a/Tiefsee/Program.cs
+++ b/Tiefsee/Program.cs
@@ -16,8 +16,6 @@ static class Program {
     public static StartWindow startWindow;
     /// <summary> 透過 UserAgent 來驗證是否有權限請求 localhost server API </summary>
     public static string webvviewUserAgent = "Tiefsee";
-    /// <summary> webview2 的啟動參數 </summary>
-    public static string webvviewArguments;
 
     /// <summary>
     /// 應用程式的主要進入點
@@ -91,12 +89,6 @@ static void Main(string[] args) {
         Application.SetCompatibleTextRenderingDefault(false);
         Application.SetHighDpiMode(HighDpiMode.PerMonitorV2); // 高 DPI 模式
 
-        //--disable-web-security  允許跨域請求
-        //--disable-features=msWebOOUI,msPdfOOUI  禁止迷你選單
-        //--user-agent  覆寫userAgent
-        //--enable-features=msWebView2EnableDraggableRegions 讓webview2支援css「app-region:drag」
-        webvviewArguments = null;
-
         if (startType != 1) { AppLock(false); } // 解除鎖定
         startWindow = new StartWindow();
 
diff --git a/Tiefsee/StartWindow.cs b/Tiefsee/StartWindow.cs
index 59e6a50..28503a2 100644
--- a/Tiefsee/StartWindow.cs
+++ b/Tiefsee/StartWindow.cs
@@ -1,4 +1,3 @@
-using Microsoft.Web.WebView2.Core;
 using System.IO;
 using System.IO.Pipes;
 using System.Text;
@@ -240,10 +239,8 @@ public async void InitJumpTask() {
     /// 初始化webview2
     /// </summary>
     private async void InitWebview() {
-        var opts = new CoreWebView2EnvironmentOptions { AdditionalBrowserArguments = Program.webvviewArguments };
-        Microsoft.Web.WebView2.WinForms.WebView2 wv2 = new Microsoft.Web.WebView2.WinForms.WebView2();
-        var webView2Environment = await CoreWebView2Environment.CreateAsync(null, AppPath.appData, opts);
-        await wv2.EnsureCoreWebView2Async(webView2Environment);
+        var wv2 = new Microsoft.Web.WebView2.WinForms.WebView2();
+        await wv2.EnsureCoreWebView2Async(await WebWindow.GetCoreWebView2Environment());
     }
 
     /// <summary>
diff --git a/Tiefsee/VW/WV_Window.cs b/Tiefsee/VW/WV_Window.cs
index f1e5f97..e5fd3fa 100644
--- a/Tiefsee/VW/WV_Window.cs
+++ b/Tiefsee/VW/WV_Window.cs
@@ -29,8 +29,8 @@ public void ClearBrowserCache() {
     /// <summary>
     /// 取得 webview2 版本資訊
     /// </summary>
-    public string GetBrowserVersionString() {
-        return M.Wv2Environment.BrowserVersionString;
+    public async Task<string> GetBrowserVersionString() {
+        return (await WebWindow.GetCoreWebView2Environment()).BrowserVersionString;
     }
 
     /// <summary>
diff --git a/Tiefsee/WebWindow.cs b/Tiefsee/WebWindow.cs
index 22365ed..c75e7b1 100644
--- a/Tiefsee/WebWindow.cs
+++ b/Tiefsee/WebWindow.cs
@@ -12,7 +12,7 @@ namespace Tiefsee;
 public class WebWindow : FormNone {
 
     private WebView2 _wv2;
-    private CoreWebView2Environment _webView2Environment;
+    private static CoreWebView2Environment _webView2Environment;
     /// <summary> 父視窗 </summary>
     private WebWindow _parentWindow;
     /// <summary> 命令列參數 </summary>
@@ -35,7 +35,6 @@ public class WebWindow : FormNone {
     private bool _windowRoundedCorners = false;
 
     public WebView2 Wv2 { get { return _wv2; } }
-    public CoreWebView2Environment Wv2Environment { get { return _webView2Environment; } }
     public WebWindow ParentWindow { get { return _parentWindow; } }
     public string[] Args { get { return _args; } }
     public static WebWindow TempWindow { get { return _tempWindow; } }
@@ -289,6 +288,22 @@ public class AppInfo {
         public DataPlugin plugin { get; set; } = Plugin.dataPlugin;
     }
 
+    /// <summary>
+    /// 取得 CoreWebView2Environment
+    /// </summary>
+    public static async Task<CoreWebView2Environment> GetCoreWebView2Environment() {
+        if (_webView2Environment != null) {
+            // --disable-web-security  允許跨域請求
+            // --disable-features=msWebOOUI,msPdfOOUI  禁止迷你選單
+            // --user-agent  覆寫userAgent
+            // --enable-features=msWebView2EnableDraggableRegions 讓 webview2 支援 css「app-region:drag」
+            string webvviewArguments = null;
+            var opts = new CoreWebView2EnvironmentOptions { AdditionalBrowserArguments = webvviewArguments };
+            _webView2Environment = await CoreWebView2Environment.CreateAsync(null, AppPath.appData, opts);
+        }
+        return _webView2Environment;
+    }
+
     /// <summary>
     ///
     /// </summary>
@@ -335,9 +350,9 @@ public async Task Init() {
             }
         });
 
-        var opts = new CoreWebView2EnvironmentOptions { AdditionalBrowserArguments = Program.webvviewArguments };
-        _webView2Environment = await CoreWebView2Environment.CreateAsync(null, AppPath.appData, opts);
-        await _wv2.EnsureCoreWebView2Async(_webView2Environment); // 等待初始化完成
+        // 等待初始化完成
+        await _wv2.EnsureCoreWebView2Async(await GetCoreWebView2Environment());
+
         // 指定為深色主題
         _wv2.CoreWebView2.Profile.PreferredColorScheme = CoreWebView2PreferredColorScheme.Dark;
         // 是否在啟用了觸摸輸入的設備上使用輕掃手勢在 WebView2 中導航