diff --git a/dwds/debug_extension_mv3/web/storage.dart b/dwds/debug_extension_mv3/web/storage.dart
index dc4328ced..26a286c63 100644
--- a/dwds/debug_extension_mv3/web/storage.dart
+++ b/dwds/debug_extension_mv3/web/storage.dart
@@ -27,6 +27,20 @@ enum StorageObject {
         return 'devToolsOpener';
     }
   }
+
+  Persistance get persistance {
+    switch (this) {
+      case StorageObject.debugInfo:
+        return Persistance.sessionOnly;
+      case StorageObject.devToolsOpener:
+        return Persistance.acrossSessions;
+    }
+  }
+}
+
+enum Persistance {
+  sessionOnly,
+  acrossSessions;
 }
 
 Future<bool> setStorageObject<T>({
@@ -39,7 +53,8 @@ Future<bool> setStorageObject<T>({
   final json = jsonEncode(serializers.serialize(value));
   final storageObj = <String, String>{storageKey: json};
   final completer = Completer<bool>();
-  chrome.storage.local.set(jsify(storageObj), allowInterop(() {
+  final storageArea = _getStorageArea(type.persistance);
+  storageArea.set(jsify(storageObj), allowInterop(() {
     if (callback != null) {
       callback();
     }
@@ -52,7 +67,8 @@ Future<bool> setStorageObject<T>({
 Future<T?> fetchStorageObject<T>({required StorageObject type, int? tabId}) {
   final storageKey = _createStorageKey(type, tabId);
   final completer = Completer<T?>();
-  chrome.storage.local.get([storageKey], allowInterop((Object storageObj) {
+  final storageArea = _getStorageArea(type.persistance);
+  storageArea.get([storageKey], allowInterop((Object storageObj) {
     final json = getProperty(storageObj, storageKey) as String?;
     if (json == null) {
       debugWarn('Does not exist.', prefix: storageKey);
@@ -66,6 +82,15 @@ Future<T?> fetchStorageObject<T>({required StorageObject type, int? tabId}) {
   return completer.future;
 }
 
+StorageArea _getStorageArea(Persistance persistance) {
+  switch (persistance) {
+    case Persistance.acrossSessions:
+      return chrome.storage.local;
+    case Persistance.sessionOnly:
+      return chrome.storage.session;
+  }
+}
+
 String _createStorageKey(StorageObject type, int? tabId) {
   if (tabId == null) return type.keyName;
   return '$tabId-${type.keyName}';
diff --git a/dwds/test/puppeteer/extension_test.dart b/dwds/test/puppeteer/extension_test.dart
index ae243c741..12369d96b 100644
--- a/dwds/test/puppeteer/extension_test.dart
+++ b/dwds/test/puppeteer/extension_test.dart
@@ -13,10 +13,11 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:dwds/data/debug_info.dart';
-import 'package:dwds/data/serializers.dart';
 import 'package:puppeteer/puppeteer.dart';
 import 'package:test/test.dart';
 
+import '../../debug_extension_mv3/web/data_serializers.dart';
+import '../../debug_extension_mv3/web/data_types.dart';
 import '../fixtures/context.dart';
 import 'test_utils.dart';
 
@@ -61,11 +62,17 @@ void main() async {
               .waitForTarget((target) => target.type == 'service_worker');
         });
 
+        tearDown(() async {
+          final worker = (await serviceWorkerTarget.worker)!;
+          await Future.delayed(Duration(seconds: executionContextDelay));
+          await worker.evaluate(_clearStorageJs());
+        });
+
         tearDownAll(() async {
           await browser.close();
         });
 
-        test('the debug info for a Dart app is saved in the extension storage',
+        test('the debug info for a Dart app is saved in session storage',
             () async {
           final appUrl = context.appUrl;
           // Navigate to the Dart app:
@@ -77,8 +84,8 @@ void main() async {
           final tabIdForAppJs = _tabIdForTabJs(appUrl);
           final appTabId = (await worker.evaluate(tabIdForAppJs)) as int;
           final debugInfoKey = '$appTabId-debugInfo';
-          final storageObj =
-              await worker.evaluate(_fetchStorageObjJs(debugInfoKey));
+          final storageObj = await worker.evaluate(
+              _fetchStorageObjJs(debugInfoKey, storageArea: 'session'));
           final json = storageObj[debugInfoKey];
           final debugInfo =
               serializers.deserialize(jsonDecode(json)) as DebugInfo;
@@ -90,6 +97,32 @@ void main() async {
           await appTab.close();
         });
 
+        test('whether to open in a new tab or window is saved in local storage',
+            () async {
+          // Navigate to the extension settings page:
+          final extensionOrigin = getExtensionOrigin(browser);
+          final settingsTab = await navigateToPage(
+            browser,
+            url: '$extensionOrigin/settings.html',
+            isNew: true,
+          );
+          // Set the settings to open DevTools in a new window:
+          await settingsTab.tap('#windowOpt');
+          await settingsTab.tap('#saveButton');
+          // Wait for the saved message to verify settings have been saved:
+          await settingsTab.waitForSelector('#savedMsg');
+          // Close the settings tab:
+          await settingsTab.close();
+          // Check that is has been saved in local storage:
+          final worker = (await serviceWorkerTarget.worker)!;
+          final storageObj = await worker.evaluate(
+              _fetchStorageObjJs('devToolsOpener', storageArea: 'local'));
+          final json = storageObj['devToolsOpener'];
+          final devToolsOpener =
+              serializers.deserialize(jsonDecode(json)) as DevToolsOpener;
+          expect(devToolsOpener.newWindow, isTrue);
+        });
+
         test(
             'can configure opening DevTools in a tab/window with extension settings',
             () async {
@@ -171,12 +204,15 @@ String _windowIdForTabJs(String tabUrl) {
 ''';
 }
 
-String _fetchStorageObjJs(String storageKey) {
+String _fetchStorageObjJs(
+  String storageKey, {
+  required String storageArea,
+}) {
   return '''
     async () => {
       const storageKey = "$storageKey";
       return new Promise((resolve, reject) => {
-        chrome.storage.local.get(storageKey, (storageObj) => {
+        chrome.storage.$storageArea.get(storageKey, (storageObj) => {
           if (storageObj != null) {
             resolve(storageObj);
           } else {
@@ -187,3 +223,13 @@ String _fetchStorageObjJs(String storageKey) {
     }
 ''';
 }
+
+String _clearStorageJs() {
+  return '''
+    async () => {
+      await chrome.storage.local.clear();
+      await chrome.storage.session.clear();
+      return true;
+    }
+''';
+}