don't show release notes on web (#180937)

fixes #179536

src/vs/workbench/contrib/update/browser/update.ts

@@ -17,7 +17,7 @@ import { INotificationService, Severity } from 'vs/platform/notification/common/
 import { IDialogService } from 'vs/platform/dialogs/common/dialogs';
 import { IBrowserWorkbenchEnvironmentService } from 'vs/workbench/services/environment/browser/environmentService';
 import { ReleaseNotesManager } from 'vs/workbench/contrib/update/browser/releaseNotesEditor';
-import { isWindows } from 'vs/base/common/platform';
+import { isWeb, isWindows } from 'vs/base/common/platform';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { RawContextKey, IContextKey, IContextKeyService, ContextKeyExpr } from 'vs/platform/contextkey/common/contextkey';
 import { MenuRegistry, MenuId, registerAction2, Action2 } from 'vs/platform/actions/common/actions';
@@ -117,6 +117,10 @@ export class ProductContribution implements IWorkbenchContribution {
 			downloadUrlKey.set(productService.downloadUrl);
 		}
 
+		if (isWeb) {
+			return;
+		}
+
 		hostService.hadLastFocus().then(async hadLastFocus => {
 			if (!hadLastFocus) {
 				return;