diff --git a/src/main/config.test.ts b/src/main/config.test.ts
index 299721e11..f0c4412cd 100644
--- a/src/main/config.test.ts
+++ b/src/main/config.test.ts
@@ -35,5 +35,6 @@ describe('main/config.ts', () => {
     expect(WindowConfig.webPreferences).toBeDefined();
     expect(WindowConfig.webPreferences.contextIsolation).toBe(true);
     expect(WindowConfig.webPreferences.nodeIntegration).toBe(false);
+    expect(WindowConfig.webPreferences.backgroundThrottling).toBe(false);
   });
 });
diff --git a/src/main/config.ts b/src/main/config.ts
index 1ced135f8..2b49861ab 100644
--- a/src/main/config.ts
+++ b/src/main/config.ts
@@ -52,5 +52,9 @@ export const WindowConfig: BrowserWindowConstructorOptions = {
     nodeIntegration: false,
     // Disable web security in development to allow CORS requests
     webSecurity: !process.env.VITE_DEV_SERVER_URL,
+    // Keep the renderer painting when the window is hidden so Chromium never
+    // freezes the last frame. Without this, reopening the menubar window shows
+    // stale notification content until the next React re-render completes.
+    backgroundThrottling: false,
   },
 };