diff --git a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindow.ts b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindow.ts
index 28cb3aafdd0..1b1271068a4 100644
--- a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindow.ts
+++ b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindow.ts
@@ -30,11 +30,7 @@ export class AuxiliaryWindow extends BaseWindow implements IAuxiliaryWindow {
 	private _win: BrowserWindow | null = null;
 	get win() {
 		if (!this._win) {
-			const window = BrowserWindow.fromWebContents(this.contents);
-			if (window) {
-				this._win = window;
-				this.registerWindowListeners(window);
-			}
+			this.tryClaimWindow();
 		}
 
 		return this._win;
@@ -62,6 +58,30 @@ export class AuxiliaryWindow extends BaseWindow implements IAuxiliaryWindow {
 		if (this.environmentMainService.args['open-devtools'] === true) {
 			this.contents.openDevTools({ mode: 'bottom' });
 		}
+
+		// Try to claim now
+		this.tryClaimWindow();
+	}
+
+	tryClaimWindow(): void {
+		if (this._win) {
+			return; // already claimed
+		}
+
+		if (this._store.isDisposed || this.contents.isDestroyed()) {
+			return; // already disposed
+		}
+
+		const window = BrowserWindow.fromWebContents(this.contents);
+		if (window) {
+			this._win = window;
+
+			// Disable Menu
+			window.setMenu(null);
+
+			// Listeners
+			this.registerWindowListeners(window);
+		}
 	}
 
 	private registerWindowListeners(window: BrowserWindow): void {
diff --git a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindows.ts b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindows.ts
index 8effe598041..70783086269 100644
--- a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindows.ts
+++ b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindows.ts
@@ -20,4 +20,6 @@ export interface IAuxiliaryWindowsMainService {
 
 	getFocusedWindow(): IAuxiliaryWindow | undefined;
 	getLastActiveWindow(): IAuxiliaryWindow | undefined;
+
+	getWindows(): readonly IAuxiliaryWindow[];
 }
diff --git a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindowsMainService.ts b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindowsMainService.ts
index a85937cf5da..01718d334cc 100644
--- a/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindowsMainService.ts
+++ b/src/vs/platform/auxiliaryWindow/electron-main/auxiliaryWindowsMainService.ts
@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { BrowserWindow, BrowserWindowConstructorOptions, WebContents } from 'electron';
+import { BrowserWindow, BrowserWindowConstructorOptions, WebContents, app } from 'electron';
 import { Event } from 'vs/base/common/event';
 import { FileAccess } from 'vs/base/common/network';
 import { AuxiliaryWindow, IAuxiliaryWindow } from 'vs/platform/auxiliaryWindow/electron-main/auxiliaryWindow';
@@ -15,11 +15,29 @@ export class AuxiliaryWindowsMainService implements IAuxiliaryWindowsMainService
 
 	declare readonly _serviceBrand: undefined;
 
-	private readonly windows = new Map<number, IAuxiliaryWindow>();
+	private readonly windows = new Map<number, AuxiliaryWindow>();
 
 	constructor(
 		@IInstantiationService private readonly instantiationService: IInstantiationService
-	) { }
+	) {
+		this.registerListeners();
+	}
+
+	private registerListeners(): void {
+
+		// We have to ensure that an auxiliary window gets to know its
+		// parent `BrowserWindow` so that it can apply listeners to it
+		// Unfortunately we cannot rely on static `BrowserWindow` methods
+		// because we might call the methods too early before the window
+		// is created.
+
+		app.on('browser-window-created', (_event, browserWindow) => {
+			const auxiliaryWindow = this.getWindowById(browserWindow.id);
+			if (auxiliaryWindow) {
+				auxiliaryWindow.tryClaimWindow();
+			}
+		});
+	}
 
 	createWindow(): BrowserWindowConstructorOptions {
 		return this.instantiationService.invokeFunction(defaultBrowserWindowOptions, undefined, {
@@ -36,7 +54,7 @@ export class AuxiliaryWindowsMainService implements IAuxiliaryWindowsMainService
 		Event.once(auxiliaryWindow.onDidClose)(() => this.windows.delete(auxiliaryWindow.id));
 	}
 
-	getWindowById(windowId: number): IAuxiliaryWindow | undefined {
+	getWindowById(windowId: number): AuxiliaryWindow | undefined {
 		return this.windows.get(windowId);
 	}
 
@@ -52,4 +70,8 @@ export class AuxiliaryWindowsMainService implements IAuxiliaryWindowsMainService
 	getLastActiveWindow(): IAuxiliaryWindow | undefined {
 		return getLastFocused(Array.from(this.windows.values()));
 	}
+
+	getWindows(): readonly IAuxiliaryWindow[] {
+		return Array.from(this.windows.values());
+	}
 }
diff --git a/src/vs/platform/menubar/electron-main/menubar.ts b/src/vs/platform/menubar/electron-main/menubar.ts
index e928d0bb273..0ef12205389 100644
--- a/src/vs/platform/menubar/electron-main/menubar.ts
+++ b/src/vs/platform/menubar/electron-main/menubar.ts
@@ -11,6 +11,7 @@ import { mnemonicMenuLabel } from 'vs/base/common/labels';
 import { isMacintosh, language } from 'vs/base/common/platform';
 import { URI } from 'vs/base/common/uri';
 import * as nls from 'vs/nls';
+import { IAuxiliaryWindowsMainService } from 'vs/platform/auxiliaryWindow/electron-main/auxiliaryWindows';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { IEnvironmentMainService } from 'vs/platform/environment/electron-main/environmentMainService';
 import { ILifecycleMainService } from 'vs/platform/lifecycle/electron-main/lifecycleMainService';
@@ -74,7 +75,8 @@ export class Menubar {
 		@ILifecycleMainService private readonly lifecycleMainService: ILifecycleMainService,
 		@ILogService private readonly logService: ILogService,
 		@INativeHostMainService private readonly nativeHostMainService: INativeHostMainService,
-		@IProductService private readonly productService: IProductService
+		@IProductService private readonly productService: IProductService,
+		@IAuxiliaryWindowsMainService private readonly auxiliaryWindowsMainService: IAuxiliaryWindowsMainService
 	) {
 		this.menuUpdater = new RunOnceScheduler(() => this.doUpdateMenu(), 0);
 
@@ -255,7 +257,7 @@ export class Menubar {
 		// If we don't have a menu yet, set it to null to avoid the electron menu.
 		// This should only happen on the first launch ever
 		if (Object.keys(this.menubarMenus).length === 0) {
-			Menu.setApplicationMenu(isMacintosh ? new Menu() : null);
+			this.doSetApplicationMenu(isMacintosh ? new Menu() : null);
 			return;
 		}
 
@@ -358,15 +360,28 @@ export class Menubar {
 		}
 
 		if (menubar.items && menubar.items.length > 0) {
-			Menu.setApplicationMenu(menubar);
+			this.doSetApplicationMenu(menubar);
 		} else {
-			Menu.setApplicationMenu(null);
+			this.doSetApplicationMenu(null);
 		}
 
 		// Dispose of older menus after some time
 		this.menuGC.schedule();
 	}
 
+	private doSetApplicationMenu(menu: (Menu) | (null)): void {
+
+		// Setting the application menu sets it to all opened windows,
+		// but we currently do not support a menu in auxiliary windows,
+		// so we need to unset it there.
+
+		Menu.setApplicationMenu(menu);
+
+		for (const window of this.auxiliaryWindowsMainService.getWindows()) {
+			window.win?.setMenu(null);
+		}
+	}
+
 	private setMacApplicationMenu(macApplicationMenu: Menu): void {
 		const about = this.createMenuItem(nls.localize('mAbout', "About {0}", this.productService.nameLong), 'workbench.action.showAboutDialog');
 		const checkForUpdates = this.getUpdateMenuItems();