diff --git a/Furious/Frozenlib/SystemRuntime.py b/Furious/Frozenlib/SystemRuntime.py
index 1d92a08..ce184e9 100644
--- a/Furious/Frozenlib/SystemRuntime.py
+++ b/Furious/Frozenlib/SystemRuntime.py
@@ -93,7 +93,11 @@ class SystemRuntime:
     @staticmethod
     def isTUNMode() -> bool:
         if PLATFORM == 'Linux':
-            return AppSettings.isStateON_('VPNMode')
+            if SystemRuntime.flatpakID():
+                # TUN Mode disabled in flatpak
+                return False
+            else:
+                return AppSettings.isStateON_('VPNMode')
         else:
             return AppSettings.isStateON_('VPNMode') and SystemRuntime.isAdmin()
 
diff --git a/Furious/TrayActions/Settings.py b/Furious/TrayActions/Settings.py
index ef8bdfe..d7d95b2 100644
--- a/Furious/TrayActions/Settings.py
+++ b/Furious/TrayActions/Settings.py
@@ -159,19 +159,22 @@ class SettingsChildAction(AppQAction):
 
 class SettingsAction(AppQAction):
     def __init__(self, **kwargs):
-        tunActions = [
-            TUNModeAction(
-                checkable=True,
-                checked=AppSettings.isStateON_('VPNMode'),
-            ),
-            AppQAction(
-                _('Customize TUN Settings...'),
-                icon=bootstrapIcon('diagram-3.svg'),
-                checkable=False,
-                callback=lambda: APP().mainWindow.getGuiTUNSettings().open(),
-            ),
-            AppQSeperator(),
-        ]
+        if SystemRuntime.flatpakID():
+            tunActions = []
+        else:
+            tunActions = [
+                TUNModeAction(
+                    checkable=True,
+                    checked=AppSettings.isStateON_('VPNMode'),
+                ),
+                AppQAction(
+                    _('Customize TUN Settings...'),
+                    icon=bootstrapIcon('diagram-3.svg'),
+                    checkable=False,
+                    callback=lambda: APP().mainWindow.getGuiTUNSettings().open(),
+                ),
+                AppQSeperator(),
+            ]
 
         if PLATFORM == 'Darwin':
             hideDockIconAction = [
diff --git a/Furious/Window/AppMainWindow.py b/Furious/Window/AppMainWindow.py
index 3d1a1f2..e682a40 100644
--- a/Furious/Window/AppMainWindow.py
+++ b/Furious/Window/AppMainWindow.py
@@ -238,15 +238,18 @@ class AppMainWindow(AppQMainWindow):
             ),
         ]
 
-        customizeTUNSettingsAction = [
-            AppQAction(
-                _('Customize TUN Settings...'),
-                icon=bootstrapIcon('diagram-3.svg'),
-                checkable=False,
-                callback=lambda: self.getGuiTUNSettings().open(),
-            ),
-            AppQSeperator(),
-        ]
+        if SystemRuntime.flatpakID():
+            customizeTUNSettingsAction = []
+        else:
+            customizeTUNSettingsAction = [
+                AppQAction(
+                    _('Customize TUN Settings...'),
+                    icon=bootstrapIcon('diagram-3.svg'),
+                    checkable=False,
+                    callback=lambda: self.getGuiTUNSettings().open(),
+                ),
+                AppQSeperator(),
+            ]
 
         if PLATFORM == 'Windows' or PLATFORM == 'Darwin':
             _TRANSLATABLE_RESTART_AS_ADMIN = [