diff --git a/VRCX.cs b/VRCX.cs
index acc91b19..106cd398 100644
--- a/VRCX.cs
+++ b/VRCX.cs
@@ -50,7 +50,7 @@ namespace VRCX
             return WinApi.FindWindow("UnityWndClass", "VRChat") != IntPtr.Zero;
         }
 
-        public void StartGame(string location, bool desktop)
+        public void StartGame(string arguments)
         {
             try
             {
@@ -61,21 +61,12 @@ namespace VRCX
                     if (match.Success)
                     {
                         var path = match.Groups[1].Value;
-                        var args = new StringBuilder();
-                        if (desktop)
-                        {
-                            args.Append("--no-vr ");
-                        }
-                        args.Append("--enable-debug-gui ");
-                        args.Append("\"vrchat://launch?id=");
-                        args.Append(location);
-                        args.Append('"');
                         Process.Start(new ProcessStartInfo
                         {
                             WorkingDirectory = path,
                             FileName = path + "\\VRChat.exe",
                             UseShellExecute = false,
-                            Arguments = args.ToString()
+                            Arguments = arguments
                         }).Close();
                     }
                 }
diff --git a/html/src/app.js b/html/src/app.js
index d4436e7d..871aa2bb 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -6964,6 +6964,40 @@ CefSharp.BindObjectAsync(
         });
     };
 
+    // App: Launch Options
+
+    $app.data.launchArguments = VRCXStorage.Get('launchArguments');
+
+    // App: Launch Options Dialog
+
+    $app.data.launchOptionsDialog = {
+        visible: false,
+        arguments: ''
+    };
+
+    API.$on('LOGOUT', function () {
+        $app.launchOptionsDialog.visible = false;
+    });
+
+    $app.methods.updateLaunchOptions = function () {
+        var D = this.launchOptionsDialog;
+        D.visible = false;
+        var args = String(D.arguments).replace(/\s+/g, ' ').trim();
+        this.launchArguments = args;
+        VRCXStorage.Set('launchArguments', args);
+        this.$message({
+            message: 'updated',
+            type: 'success'
+        });
+    };
+
+    $app.methods.showLaunchOptions = function () {
+        this.$nextTick(() => adjustDialogZ(this.$refs.launchOptionsDialog.$el));
+        var D = this.launchOptionsDialog;
+        D.arguments = this.launchArguments;
+        D.visible = true;
+    };
+
     // App: Launch Dialog
 
     $app.data.launchDialog = {
@@ -7000,9 +7034,19 @@ CefSharp.BindObjectAsync(
         D.visible = true;
     };
 
-    $app.methods.launchGame = function () {
+    $app.methods.locationToLaunchArg = function (location) {
+        return `"vrchat://launch?id=${location}"`;
+    }
+
+    $app.methods.launchGame = function (...args) {
         var D = this.launchDialog;
-        VRCX.StartGame(D.location, D.desktop);
+        if (this.launchArguments) {
+            args.push(this.launchArguments);
+        }
+        if (D.desktop === true) {
+            args.push('--no-vr');
+        }
+        VRCX.StartGame(args.join(' '));
         D.visible = false;
     };
 
diff --git a/html/src/index.pug b/html/src/index.pug
index fc2beed7..ba073c80 100644
--- a/html/src/index.pug
+++ b/html/src/index.pug
@@ -378,6 +378,9 @@ html
                             .detail
                                 span.name Repository URL
                                 span.extra https://github.com/pypy-vrc/VRCX
+                div(style="margin-top:5px")
+                    el-button-group
+                        el-button(size="small" icon="el-icon-s-operation" @click="showLaunchOptions()") VRChat Launch Options
                 div(style="margin-top:30px")
                     span(style="font-weight:bold") Direct Access
                     div(style="margin-top:5px")
@@ -1031,13 +1034,25 @@ html
                     el-button(size="small" @click="showInviteDialog(newInstanceDialog.location)") Invite
                     el-button(type="primary" size="small" @click="showLaunchDialog(newInstanceDialog.location)") Launch
 
+            //- dialog: launch options
+            el-dialog.x-dialog(ref="launchOptionsDialog" :visible.sync="launchOptionsDialog.visible" title="Launch Options" width="400px")
+                div(style='font-size:12px;')
+                    | These options are for advanced users only. #[br]
+                    | to change fps: --fps=<N> ex) #[el-tag(size="mini") --fps=144]
+                el-input(type="textarea" v-model="launchOptionsDialog.arguments" size="mini" show-word-limit :autosize="{ minRows:2, maxRows:5 }" placeholder="" style="margin-top:10px")
+                template(#footer)
+                    div(style="display:flex")
+                        el-button(size="small" @click="openExternalLink('https://docs.vrchat.com/docs/launch-options')") VRChat Docs
+                        el-button(size="small" @click="openExternalLink('https://docs.unity3d.com/Manual/CommandLineArguments.html')") Unity Manual
+                        el-button(type="primary" size="small" :disabled="launchOptionsDialog.loading" @click="updateLaunchOptions" style="margin-left:auto") OK
+
             //- dialog: launch
             el-dialog.x-dialog(ref="launchDialog" :visible.sync="launchDialog.visible" title="Launch" width="400px")
                 div #[span(v-text="launchDialog.url" style="word-break:break-all;font-size:12px")]
                 template(#footer)
                     el-checkbox(v-model="launchDialog.desktop" style="float:left;margin-top:5px") Start as Desktop (No VR)
                     el-button(size="small" @click="showInviteDialog(launchDialog.location)") Invite
-                    el-button(type="primary" size="small" @click="launchGame()") Launch
+                    el-button(type="primary" size="small" @click="launchGame(locationToLaunchArg(launchDialog.location))") Launch
 
             //- dialog: open source software notice
             el-dialog.x-dialog(:visible.sync="ossDialog" title="Open Source Software Notice" width="650px")