diff --git a/Assets/Scripts/OnlineSessionBrowserUI.cs b/Assets/Scripts/OnlineSessionBrowserUI.cs
index e0cafea..8ea320d 100644
--- a/Assets/Scripts/OnlineSessionBrowserUI.cs
+++ b/Assets/Scripts/OnlineSessionBrowserUI.cs
@@ -20,10 +20,12 @@ using UnityEngine.InputSystem;
 ///
 /// Overlay behaviour: the panel is always shown in Main (not connected). Once a connection is up it hides;
 /// in the lobby/map Esc toggles it back as a modal pause overlay (cursor freed, local gameplay suspended via
-/// <see cref="GameModeManager.SetPaused"/>). On the map the Disconnect button becomes "Back to Lobby" for the
-/// match authority (ends the match), while everyone else (in the lobby, or a non-authority client on the map)
-/// gets a plain disconnect. Only the visual <see cref="panelRoot"/> is toggled - this binder stays alive on
-/// its (always-active) canvas so it keeps reading Esc while the panel is hidden.
+/// <see cref="GameModeManager.SetPaused"/>). The Disconnect button is context-sensitive: in Main (not
+/// connected) it is an application "Exit" (quits the build, or stops play mode in the editor) so the player
+/// can leave without Alt+F4; on the map it becomes "Back to Lobby" for the match authority (ends the match);
+/// everyone else (in the lobby, or a non-authority client on the map) gets a plain disconnect. Only the
+/// visual <see cref="panelRoot"/> is toggled - this binder stays alive on its (always-active) canvas so it
+/// keeps reading Esc while the panel is hidden.
 /// </summary>
 public class OnlineSessionBrowserUI : MonoBehaviour
 {
@@ -142,6 +144,14 @@ public class OnlineSessionBrowserUI : MonoBehaviour
     {
         if (!manager) return;
 
+        // In Main (no session) the button is an application Exit, so the player can quit the build
+        // without Alt+F4.
+        if (!manager.IsConnected)
+        {
+            QuitApplication();
+            return;
+        }
+
         // On the map, the match AUTHORITY's button means "Back to Lobby" (end the match for everyone)
         // rather than leaving the session. Everyone else - in the lobby, or a non-authority client on the
         // map - does a plain disconnect.
@@ -155,6 +165,15 @@ public class OnlineSessionBrowserUI : MonoBehaviour
         manager.Disconnect();
     }
 
+    private static void QuitApplication()
+    {
+#if UNITY_EDITOR
+        UnityEditor.EditorApplication.isPlaying = false;
+#else
+        Application.Quit();
+#endif
+    }
+
     private void OnManagerChanged()
     {
         if (!manager) return;
@@ -192,8 +211,13 @@ public class OnlineSessionBrowserUI : MonoBehaviour
     private void RefreshDisconnectLabel()
     {
         if (!_disconnectLabel) return;
-        bool backToLobby = _match && _match.IsLocalSceneMap && _match.IsLocalMatchAuthority;
-        string text = backToLobby ? "Back to Lobby" : "Disconnect";
+        string text;
+        if (!(manager && manager.IsConnected))
+            text = "Exit";                                                       // Main: quit the application
+        else if (_match && _match.IsLocalSceneMap && _match.IsLocalMatchAuthority)
+            text = "Back to Lobby";
+        else
+            text = "Disconnect";
         if (text != _disconnectText)
         {
             _disconnectText = text;
@@ -211,7 +235,8 @@ public class OnlineSessionBrowserUI : MonoBehaviour
         if (hostButton) hostButton.interactable = !busy && !connected;
         if (refreshButton) refreshButton.interactable = !busy && !connected;
         if (joinButton) joinButton.interactable = !busy && !connected && hasSelection;
-        if (disconnectButton) disconnectButton.interactable = !busy && connected;
+        // Usable whenever idle: connected -> Disconnect / Back to Lobby; in Main -> Exit.
+        if (disconnectButton) disconnectButton.interactable = !busy;
     }
 
     private void RebuildList()