diff --git a/arduino-ide-extension/package.json b/arduino-ide-extension/package.json
index 713c7868c..4e5ab0d16 100644
--- a/arduino-ide-extension/package.json
+++ b/arduino-ide-extension/package.json
@@ -150,6 +150,10 @@
       "frontend": "lib/browser/theia/core/browser-menu-module",
       "frontendElectron": "lib/electron-browser/theia/core/electron-menu-module"
     },
+    {
+      "frontend": "lib/browser/theia/core/browser-window-module",
+      "frontendElectron": "lib/electron-browser/theia/core/electron-window-module"
+    },
     {
       "electronMain": "lib/electron-main/arduino-electron-main-module"
     }
diff --git a/arduino-ide-extension/src/browser/contributions/first-startup-installer.ts b/arduino-ide-extension/src/browser/contributions/first-startup-installer.ts
index 5010c5fc9..8f469ee7d 100644
--- a/arduino-ide-extension/src/browser/contributions/first-startup-installer.ts
+++ b/arduino-ide-extension/src/browser/contributions/first-startup-installer.ts
@@ -43,7 +43,7 @@ export class FirstStartupInstaller extends Contribution {
             // If arduino:avr installation fails because it's already installed we don't want to retry on next start-up
             console.error(e);
           } else {
-            // But if there is any other error (e.g.: no interntet cconnection), we want to retry next time
+            // But if there is any other error (e.g.: no Internet connection), we want to retry next time
             avrPackageError = e;
           }
         }
@@ -64,7 +64,7 @@ export class FirstStartupInstaller extends Contribution {
             // If Arduino_BuiltIn installation fails because it's already installed we don't want to retry on next start-up
             console.log('error installing core', e);
           } else {
-            // But if there is any other error (e.g.: no interntet cconnection), we want to retry next time
+            // But if there is any other error (e.g.: no Internet connection), we want to retry next time
             builtInLibraryError = e;
           }
         }
diff --git a/arduino-ide-extension/src/browser/theia/core/browser-window-module.ts b/arduino-ide-extension/src/browser/theia/core/browser-window-module.ts
new file mode 100644
index 000000000..ac0862b75
--- /dev/null
+++ b/arduino-ide-extension/src/browser/theia/core/browser-window-module.ts
@@ -0,0 +1,10 @@
+import { DefaultWindowService as TheiaDefaultWindowService } from '@theia/core/lib/browser/window/default-window-service';
+import { ContainerModule } from '@theia/core/shared/inversify';
+import { DefaultWindowService } from './default-window-service';
+import { WindowServiceExt } from './window-service-ext';
+
+export default new ContainerModule((bind, unbind, isBound, rebind) => {
+  bind(DefaultWindowService).toSelf().inSingletonScope();
+  rebind(TheiaDefaultWindowService).toService(DefaultWindowService);
+  bind(WindowServiceExt).toService(DefaultWindowService);
+});
diff --git a/arduino-ide-extension/src/browser/theia/core/default-window-service.ts b/arduino-ide-extension/src/browser/theia/core/default-window-service.ts
new file mode 100644
index 000000000..145691727
--- /dev/null
+++ b/arduino-ide-extension/src/browser/theia/core/default-window-service.ts
@@ -0,0 +1,17 @@
+import { DefaultWindowService as TheiaDefaultWindowService } from '@theia/core/lib/browser/window/default-window-service';
+import { injectable } from '@theia/core/shared/inversify';
+import { WindowServiceExt } from './window-service-ext';
+
+@injectable()
+export class DefaultWindowService
+  extends TheiaDefaultWindowService
+  implements WindowServiceExt
+{
+  /**
+   * The default implementation always resolves to `true`.
+   * IDE2 does not use it. It's currently an electron-only app.
+   */
+  async isFirstWindow(): Promise<boolean> {
+    return true;
+  }
+}
diff --git a/arduino-ide-extension/src/browser/theia/core/window-service-ext.ts b/arduino-ide-extension/src/browser/theia/core/window-service-ext.ts
new file mode 100644
index 000000000..f22e55cc4
--- /dev/null
+++ b/arduino-ide-extension/src/browser/theia/core/window-service-ext.ts
@@ -0,0 +1,7 @@
+export const WindowServiceExt = Symbol('WindowServiceExt');
+export interface WindowServiceExt {
+  /**
+   * Returns with a promise that resolves to `true` if the current window is the first window.
+   */
+  isFirstWindow(): Promise<boolean>;
+}
diff --git a/arduino-ide-extension/src/electron-browser/theia/core/electron-menu-module.ts b/arduino-ide-extension/src/electron-browser/theia/core/electron-menu-module.ts
index bed0179ee..101e44b56 100644
--- a/arduino-ide-extension/src/electron-browser/theia/core/electron-menu-module.ts
+++ b/arduino-ide-extension/src/electron-browser/theia/core/electron-menu-module.ts
@@ -1,14 +1,7 @@
 import { ContainerModule } from '@theia/core/shared/inversify';
-import { WindowService } from '@theia/core/lib/browser/window/window-service';
 import { ElectronMainMenuFactory as TheiaElectronMainMenuFactory } from '@theia/core/lib/electron-browser/menu/electron-main-menu-factory';
 import { ElectronMenuContribution as TheiaElectronMenuContribution } from '@theia/core/lib/electron-browser/menu/electron-menu-contribution';
-import { ElectronIpcConnectionProvider } from '@theia/core/lib/electron-browser/messaging/electron-ipc-connection-provider';
-import {
-  SplashService,
-  splashServicePath,
-} from '../../../electron-common/splash-service';
 import { MainMenuManager } from '../../../common/main-menu-manager';
-import { ElectronWindowService } from '../../electron-window-service';
 import { ElectronMainMenuFactory } from './electron-main-menu-factory';
 import { ElectronMenuContribution } from './electron-menu-contribution';
 import { nls } from '@theia/core/lib/common/nls';
@@ -16,23 +9,25 @@ import { nls } from '@theia/core/lib/common/nls';
 import * as remote from '@theia/core/electron-shared/@electron/remote';
 import * as dialogs from '@theia/core/lib/browser/dialogs';
 
-
 Object.assign(dialogs, {
   confirmExit: async () => {
     const messageBoxResult = await remote.dialog.showMessageBox(
       remote.getCurrentWindow(),
       {
-        message: nls.localize('theia/core/quitMessage', 'Any unsaved changes will not be saved.'),
-        title: nls.localize('theia/core/quitTitle', 'Are you sure you want to quit?'),
+        message: nls.localize(
+          'theia/core/quitMessage',
+          'Any unsaved changes will not be saved.'
+        ),
+        title: nls.localize(
+          'theia/core/quitTitle',
+          'Are you sure you want to quit?'
+        ),
         type: 'question',
-        buttons: [
-          dialogs.Dialog.CANCEL,
-          dialogs.Dialog.YES,
-        ],
+        buttons: [dialogs.Dialog.CANCEL, dialogs.Dialog.YES],
       }
-    )
+    );
     return messageBoxResult.response === 1;
-  }
+  },
 });
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
@@ -41,14 +36,4 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
   rebind(TheiaElectronMenuContribution).toService(ElectronMenuContribution);
   bind(ElectronMainMenuFactory).toSelf().inSingletonScope();
   rebind(TheiaElectronMainMenuFactory).toService(ElectronMainMenuFactory);
-  bind(ElectronWindowService).toSelf().inSingletonScope();
-  rebind(WindowService).toService(ElectronWindowService);
-  bind(SplashService)
-    .toDynamicValue((context) =>
-      ElectronIpcConnectionProvider.createProxy(
-        context.container,
-        splashServicePath
-      )
-    )
-    .inSingletonScope();
 });
diff --git a/arduino-ide-extension/src/electron-browser/theia/core/electron-window-module.ts b/arduino-ide-extension/src/electron-browser/theia/core/electron-window-module.ts
new file mode 100644
index 000000000..9328572b1
--- /dev/null
+++ b/arduino-ide-extension/src/electron-browser/theia/core/electron-window-module.ts
@@ -0,0 +1,32 @@
+import { WindowService } from '@theia/core/lib/browser/window/window-service';
+import { ElectronIpcConnectionProvider } from '@theia/core/lib/electron-browser/messaging/electron-ipc-connection-provider';
+import { ContainerModule } from '@theia/core/shared/inversify';
+import { WindowServiceExt } from '../../../browser/theia/core/window-service-ext';
+import {
+  ElectronMainWindowServiceExt,
+  electronMainWindowServiceExtPath,
+} from '../../../electron-common/electron-main-window-service-ext';
+import {
+  SplashService,
+  splashServicePath,
+} from '../../../electron-common/splash-service';
+import { ElectronWindowService } from './electron-window-service';
+
+export default new ContainerModule((bind, unbind, isBound, rebind) => {
+  bind(ElectronWindowService).toSelf().inSingletonScope();
+  rebind(WindowService).toService(ElectronWindowService);
+  bind(WindowServiceExt).toService(ElectronWindowService);
+  bind(ElectronMainWindowServiceExt)
+    .toDynamicValue(({ container }) =>
+      ElectronIpcConnectionProvider.createProxy(
+        container,
+        electronMainWindowServiceExtPath
+      )
+    )
+    .inSingletonScope();
+  bind(SplashService)
+    .toDynamicValue(({ container }) =>
+      ElectronIpcConnectionProvider.createProxy(container, splashServicePath)
+    )
+    .inSingletonScope();
+});
diff --git a/arduino-ide-extension/src/electron-browser/electron-window-service.ts b/arduino-ide-extension/src/electron-browser/theia/core/electron-window-service.ts
similarity index 61%
rename from arduino-ide-extension/src/electron-browser/electron-window-service.ts
rename to arduino-ide-extension/src/electron-browser/theia/core/electron-window-service.ts
index 1407ac425..2f571b419 100644
--- a/arduino-ide-extension/src/electron-browser/electron-window-service.ts
+++ b/arduino-ide-extension/src/electron-browser/theia/core/electron-window-service.ts
@@ -1,4 +1,8 @@
-import { inject, injectable, postConstruct } from '@theia/core/shared/inversify';
+import {
+  inject,
+  injectable,
+  postConstruct,
+} from '@theia/core/shared/inversify';
 import * as remote from '@theia/core/electron-shared/@electron/remote';
 import { FrontendApplicationStateService } from '@theia/core/lib/browser/frontend-application-state';
 import {
@@ -6,19 +10,27 @@ import {
   ConnectionStatusService,
 } from '@theia/core/lib/browser/connection-status-service';
 import { ElectronWindowService as TheiaElectronWindowService } from '@theia/core/lib/electron-browser/window/electron-window-service';
-import { SplashService } from '../electron-common/splash-service';
+import { SplashService } from '../../../electron-common/splash-service';
 import { nls } from '@theia/core/lib/common';
+import { WindowServiceExt } from '../../../browser/theia/core/window-service-ext';
+import { ElectronMainWindowServiceExt } from '../../../electron-common/electron-main-window-service-ext';
 
 @injectable()
-export class ElectronWindowService extends TheiaElectronWindowService {
+export class ElectronWindowService
+  extends TheiaElectronWindowService
+  implements WindowServiceExt
+{
   @inject(ConnectionStatusService)
-  protected readonly connectionStatusService: ConnectionStatusService;
+  private readonly connectionStatusService: ConnectionStatusService;
 
   @inject(SplashService)
-  protected readonly splashService: SplashService;
+  private readonly splashService: SplashService;
 
   @inject(FrontendApplicationStateService)
-  protected readonly appStateService: FrontendApplicationStateService;
+  private readonly appStateService: FrontendApplicationStateService;
+
+  @inject(ElectronMainWindowServiceExt)
+  private readonly mainWindowServiceExt: ElectronMainWindowServiceExt;
 
   @postConstruct()
   protected override init(): void {
@@ -55,4 +67,15 @@ export class ElectronWindowService extends TheiaElectronWindowService {
     });
     return response === 0; // 'Yes', close the window.
   }
+
+  private _firstWindow: boolean | undefined;
+  async isFirstWindow(): Promise<boolean> {
+    if (this._firstWindow === undefined) {
+      const windowId = remote.getCurrentWindow().id; // This is expensive and synchronous so we check it once per FE.
+      this._firstWindow = await this.mainWindowServiceExt.isFirstWindow(
+        windowId
+      );
+    }
+    return this._firstWindow;
+  }
 }
diff --git a/arduino-ide-extension/src/electron-common/electron-main-window-service-ext.ts b/arduino-ide-extension/src/electron-common/electron-main-window-service-ext.ts
new file mode 100644
index 000000000..c0e52d353
--- /dev/null
+++ b/arduino-ide-extension/src/electron-common/electron-main-window-service-ext.ts
@@ -0,0 +1,7 @@
+export const electronMainWindowServiceExtPath = '/services/electron-window-ext';
+export const ElectronMainWindowServiceExt = Symbol(
+  'ElectronMainWindowServiceExt'
+);
+export interface ElectronMainWindowServiceExt {
+  isFirstWindow(windowId: number): Promise<boolean>;
+}
diff --git a/arduino-ide-extension/src/electron-main/arduino-electron-main-module.ts b/arduino-ide-extension/src/electron-main/arduino-electron-main-module.ts
index 7da0c7314..0146fd02a 100644
--- a/arduino-ide-extension/src/electron-main/arduino-electron-main-module.ts
+++ b/arduino-ide-extension/src/electron-main/arduino-electron-main-module.ts
@@ -1,31 +1,31 @@
-import { ContainerModule } from '@theia/core/shared/inversify';
 import { JsonRpcConnectionHandler } from '@theia/core/lib/common/messaging/proxy-factory';
-import { ElectronConnectionHandler } from '@theia/core/lib/electron-common/messaging/electron-connection-handler';
 import { ElectronMainWindowService } from '@theia/core/lib/electron-common/electron-main-window-service';
+import { ElectronConnectionHandler } from '@theia/core/lib/electron-common/messaging/electron-connection-handler';
 import {
   ElectronMainApplication as TheiaElectronMainApplication,
   ElectronMainApplicationContribution,
 } from '@theia/core/lib/electron-main/electron-main-application';
+import { TheiaElectronWindow as DefaultTheiaElectronWindow } from '@theia/core/lib/electron-main/theia-electron-window';
+import { ContainerModule } from '@theia/core/shared/inversify';
+import {
+  IDEUpdater,
+  IDEUpdaterClient,
+  IDEUpdaterPath,
+} from '../common/protocol/ide-updater';
+import {
+  ElectronMainWindowServiceExt,
+  electronMainWindowServiceExtPath,
+} from '../electron-common/electron-main-window-service-ext';
 import {
   SplashService,
   splashServicePath,
 } from '../electron-common/splash-service';
+import { ElectronMainWindowServiceExtImpl } from './electron-main-window-service-ext-impl';
+import { IDEUpdaterImpl } from './ide-updater/ide-updater-impl';
 import { SplashServiceImpl } from './splash/splash-service-impl';
 import { ElectronMainApplication } from './theia/electron-main-application';
 import { ElectronMainWindowServiceImpl } from './theia/electron-main-window-service';
-import {
-  IDEUpdater,
-  IDEUpdaterClient,
-  IDEUpdaterPath,
-} from '../common/protocol/ide-updater';
-import { IDEUpdaterImpl } from './ide-updater/ide-updater-impl';
 import { TheiaElectronWindow } from './theia/theia-electron-window';
-import { TheiaElectronWindow as DefaultTheiaElectronWindow } from '@theia/core/lib/electron-main/theia-electron-window';
-import { SurveyNotificationServiceImpl } from '../node/survey-service-impl';
-import {
-  SurveyNotificationService,
-  SurveyNotificationServicePath,
-} from '../common/protocol/survey-service';
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
   bind(ElectronMainApplication).toSelf().inSingletonScope();
@@ -67,19 +67,14 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
   bind(TheiaElectronWindow).toSelf();
   rebind(DefaultTheiaElectronWindow).toService(TheiaElectronWindow);
 
-  // Survey notification bindings
-  bind(SurveyNotificationServiceImpl).toSelf().inSingletonScope();
-  bind(SurveyNotificationService).toService(SurveyNotificationServiceImpl);
-  bind(ElectronMainApplicationContribution).toService(
-    SurveyNotificationService
-  );
+  bind(ElectronMainWindowServiceExt)
+    .to(ElectronMainWindowServiceExtImpl)
+    .inSingletonScope();
   bind(ElectronConnectionHandler)
     .toDynamicValue(
       (context) =>
-        new JsonRpcConnectionHandler(SurveyNotificationServicePath, () =>
-          context.container.get<SurveyNotificationService>(
-            SurveyNotificationService
-          )
+        new JsonRpcConnectionHandler(electronMainWindowServiceExtPath, () =>
+          context.container.get(ElectronMainWindowServiceExt)
         )
     )
     .inSingletonScope();
diff --git a/arduino-ide-extension/src/electron-main/electron-main-window-service-ext-impl.ts b/arduino-ide-extension/src/electron-main/electron-main-window-service-ext-impl.ts
new file mode 100644
index 000000000..a0c872786
--- /dev/null
+++ b/arduino-ide-extension/src/electron-main/electron-main-window-service-ext-impl.ts
@@ -0,0 +1,15 @@
+import { inject, injectable } from '@theia/core/shared/inversify';
+import { ElectronMainWindowServiceExt } from '../electron-common/electron-main-window-service-ext';
+import { ElectronMainApplication } from './theia/electron-main-application';
+
+@injectable()
+export class ElectronMainWindowServiceExtImpl
+  implements ElectronMainWindowServiceExt
+{
+  @inject(ElectronMainApplication)
+  private readonly app: ElectronMainApplication;
+
+  async isFirstWindow(windowId: number): Promise<boolean> {
+    return this.app.firstWindowId === windowId;
+  }
+}
diff --git a/arduino-ide-extension/src/electron-main/theia/electron-main-application.ts b/arduino-ide-extension/src/electron-main/theia/electron-main-application.ts
index 4a3a3ade2..e5159a149 100644
--- a/arduino-ide-extension/src/electron-main/theia/electron-main-application.ts
+++ b/arduino-ide-extension/src/electron-main/theia/electron-main-application.ts
@@ -66,11 +66,12 @@ const APP_STARTED_WITH_CONTENT_TRACE =
 
 @injectable()
 export class ElectronMainApplication extends TheiaElectronMainApplication {
-  protected startup = false;
-  protected openFilePromise = new Deferred();
+  private startup = false;
+  private _firstWindowId: number | undefined;
+  private openFilePromise = new Deferred();
 
   @inject(SplashServiceImpl)
-  protected readonly splashService: SplashServiceImpl;
+  private readonly splashService: SplashServiceImpl;
 
   override async start(config: FrontendApplicationConfig): Promise<void> {
     // Explicitly set the app name to have better menu items on macOS. ("About", "Hide", and "Quit")
@@ -142,7 +143,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     })();
   }
 
-  attachFileAssociations() {
+  private attachFileAssociations(): void {
     // OSX: register open-file event
     if (os.isOSX) {
       app.on('open-file', async (event, uri) => {
@@ -158,7 +159,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     }
   }
 
-  protected async isValidSketchPath(uri: string): Promise<boolean | undefined> {
+  private async isValidSketchPath(uri: string): Promise<boolean | undefined> {
     return typeof uri === 'string' && (await fs.pathExists(uri));
   }
 
@@ -201,7 +202,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     }
   }
 
-  protected async launchFromArgs(
+  private async launchFromArgs(
     params: ElectronMainExecutionParams
   ): Promise<boolean> {
     // Copy to prevent manipulation of original array
@@ -223,7 +224,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     return false;
   }
 
-  protected async openSketch(
+  private async openSketch(
     workspace: WorkspaceOptions | string
   ): Promise<BrowserWindow> {
     const options = await this.getLastWindowOptions();
@@ -257,7 +258,8 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
   }
 
   protected override getTitleBarStyle(
-    config: FrontendApplicationConfig
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    _config: FrontendApplicationConfig
   ): 'native' | 'custom' {
     return 'native';
   }
@@ -354,6 +356,9 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
       electronWindow.webContents.openDevTools();
     }
     this.attachListenersToWindow(electronWindow);
+    if (this._firstWindowId === undefined) {
+      this._firstWindowId = electronWindow.id;
+    }
     return electronWindow;
   }
 
@@ -389,7 +394,7 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
           });
           event.newGuest = new BrowserWindow(options);
           event.newGuest.setMenu(null);
-          event.newGuest?.on('closed', (e: any) => {
+          event.newGuest?.on('closed', () => {
             electronWindow?.webContents.send('CLOSE_CHILD_WINDOW');
           });
           event.newGuest?.loadURL(url);
@@ -462,9 +467,9 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
     }
   }
 
-  protected closedWorkspaces: WorkspaceOptions[] = [];
+  private closedWorkspaces: WorkspaceOptions[] = [];
 
-  protected attachClosedWorkspace(window: BrowserWindow): void {
+  private attachClosedWorkspace(window: BrowserWindow): void {
     // Since the `before-quit` event is only fired when closing the *last* window
     // We need to keep track of recently closed windows/workspaces manually
     window.on('close', () => {
@@ -522,4 +527,8 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
   get browserWindows(): BrowserWindow[] {
     return Array.from(this.windows.values()).map(({ window }) => window);
   }
+
+  get firstWindowId(): number | undefined {
+    return this._firstWindowId;
+  }
 }
diff --git a/arduino-ide-extension/src/node/arduino-ide-backend-module.ts b/arduino-ide-extension/src/node/arduino-ide-backend-module.ts
index 6338b5320..b21f5d301 100644
--- a/arduino-ide-extension/src/node/arduino-ide-backend-module.ts
+++ b/arduino-ide-extension/src/node/arduino-ide-backend-module.ts
@@ -104,6 +104,11 @@ import { ClangFormatter } from './clang-formatter';
 import { FormatterPath } from '../common/protocol/formatter';
 import { LocalizationBackendContribution } from './i18n/localization-backend-contribution';
 import { LocalizationBackendContribution as TheiaLocalizationBackendContribution } from '@theia/core/lib/node/i18n/localization-backend-contribution';
+import { SurveyNotificationServiceImpl } from './survey-service-impl';
+import {
+  SurveyNotificationService,
+  SurveyNotificationServicePath,
+} from '../common/protocol/survey-service';
 
 export default new ContainerModule((bind, unbind, isBound, rebind) => {
   bind(BackendApplication).toSelf().inSingletonScope();
@@ -401,4 +406,17 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
   rebind(TheiaLocalizationBackendContribution).toService(
     LocalizationBackendContribution
   );
+
+  // Survey notification bindings
+  // It's currently unused. https://github.com/arduino/arduino-ide/pull/1150
+  bind(SurveyNotificationServiceImpl).toSelf().inSingletonScope();
+  bind(SurveyNotificationService).toService(SurveyNotificationServiceImpl);
+  bind(ConnectionHandler)
+    .toDynamicValue(
+      ({ container }) =>
+        new JsonRpcConnectionHandler(SurveyNotificationServicePath, () =>
+          container.get<SurveyNotificationService>(SurveyNotificationService)
+        )
+    )
+    .inSingletonScope();
 });