diff --git a/packages/ada_chat_flutter/lib/src/ada_web_view.dart b/packages/ada_chat_flutter/lib/src/ada_web_view.dart
index b5c637cf..5bb48e1d 100644
--- a/packages/ada_chat_flutter/lib/src/ada_web_view.dart
+++ b/packages/ada_chat_flutter/lib/src/ada_web_view.dart
@@ -181,7 +181,7 @@ class AdaWebViewState extends State<AdaWebView> {
           onPageFinished: onPageFinished,
           onHttpError: _onHttpError,
           onWebResourceError: _onWebResourceError,
-          onNavigationRequest: _onNavigationRequest,
+          onNavigationRequest: onNavigationRequest,
         ),
       );
 
@@ -191,12 +191,13 @@ class AdaWebViewState extends State<AdaWebView> {
   void _onConsoleMessage(JavaScriptConsoleMessage message) =>
       widget.onConsoleMessage?.call(message.level.toString(), message.message);
 
-  FutureOr<NavigationDecision> _onNavigationRequest(NavigationRequest request) {
+  @visibleForTesting
+  FutureOr<NavigationDecision> onNavigationRequest(NavigationRequest request) {
     final uri = Uri.parse(request.url);
     log('AdaWebView:onNavigationRequest: '
         'url=${uri.toString()}, isMainFrame=${request.isMainFrame}');
 
-    if (isInternalAdaUrl(uri)) {
+    if (isInternalAdaUrl(uri, widget.embedUri, widget.handle)) {
       return NavigationDecision.navigate;
     }
 
@@ -215,16 +216,6 @@ class AdaWebViewState extends State<AdaWebView> {
     return NavigationDecision.prevent;
   }
 
-  @visibleForTesting
-  bool isInternalAdaUrl(Uri uri) =>
-      _isAdaChatLink(uri) || _isAdaSupportLink(uri) || _isBlankPage(uri);
-
-  bool _isBlankPage(Uri uri) => uri.toString() == 'about:blank';
-
-  bool _isAdaSupportLink(Uri uri) => uri.host == '${widget.handle}.ada.support';
-
-  bool _isAdaChatLink(Uri uri) => uri == widget.embedUri;
-
   void _onWebResourceError(WebResourceError error) =>
       log('AdaWebView:onWebResourceError: '
           'errorCode=${error.errorCode}, '
@@ -232,9 +223,7 @@ class AdaWebViewState extends State<AdaWebView> {
 
   void _onHttpError(HttpResponseError error) => widget.onLoadingError?.call(
         error.request?.uri.toString() ?? '',
-        'uri=${error.response?.uri}, '
-        'statusCode=${error.response?.statusCode}, '
-        'headers=${error.response?.headers}, ',
+        'statusCode=${error.response?.statusCode}',
       );
 
   @visibleForTesting
@@ -383,12 +372,4 @@ console.log("adaSettings: " + JSON.stringify(window.adaSettings));
       },
     );
   }
-
-  dynamic jsonStrToMap(String message) {
-    if (message.isEmpty) {
-      return <String, dynamic>{};
-    }
-
-    return jsonDecode(message);
-  }
 }
diff --git a/packages/ada_chat_flutter/lib/src/utils.dart b/packages/ada_chat_flutter/lib/src/utils.dart
index c0b8197e..027e8108 100644
--- a/packages/ada_chat_flutter/lib/src/utils.dart
+++ b/packages/ada_chat_flutter/lib/src/utils.dart
@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:flutter/foundation.dart';
 
 String get getOsName {
@@ -9,3 +11,23 @@ String get getOsName {
     return 'N/A';
   }
 }
+
+bool isInternalAdaUrl(Uri uri, Uri embedUri, String handle) =>
+    isAdaChatLink(uri, embedUri) ||
+    isAdaSupportLink(uri, handle) ||
+    isBlankPage(uri);
+
+bool isBlankPage(Uri uri) => uri.toString() == 'about:blank';
+
+bool isAdaSupportLink(Uri uri, String handle) =>
+    uri.host == '$handle.ada.support';
+
+bool isAdaChatLink(Uri uri, Uri embedUri) => uri == embedUri;
+
+dynamic jsonStrToMap(String message) {
+  if (message.isEmpty) {
+    return <String, dynamic>{};
+  }
+
+  return json.decode(message);
+}
diff --git a/packages/ada_chat_flutter/test/src/ada_web_view_test.dart b/packages/ada_chat_flutter/test/src/ada_web_view_test.dart
index d01d733c..cbb693f0 100644
--- a/packages/ada_chat_flutter/test/src/ada_web_view_test.dart
+++ b/packages/ada_chat_flutter/test/src/ada_web_view_test.dart
@@ -1,6 +1,7 @@
 import 'package:ada_chat_flutter/src/ada_controller.dart';
 import 'package:ada_chat_flutter/src/ada_web_view.dart';
 import 'package:ada_chat_flutter/src/browser_settings.dart';
+import 'package:ada_chat_flutter/src/customized_web_view.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:mocktail/mocktail.dart';
@@ -15,6 +16,23 @@ const _regexp = '_regexp';
 const _handle = '_handle';
 const _embedUri = 'https://example.com/embed.html';
 
+final _browserSettings = BrowserSettings(
+  pageBuilder: (
+    context,
+    browser,
+    controller,
+  ) =>
+      Column(
+    children: [
+      Text(_title),
+      browser,
+    ],
+  ),
+  adaHideUrls: [
+    RegExp(_regexp),
+  ],
+);
+
 void main() {
   late _MockAdaController mockAdaController;
 
@@ -44,30 +62,6 @@ void main() {
       },
     );
 
-    testWidgets(
-      'GIVEN the widget is pumped '
-      'WHEN isInternalAdaUrl is called '
-      'THEN should rebuild correct result',
-      (WidgetTester tester) async {
-        await tester.pumpWidget(
-          MaterialApp(
-            home: _buildAdaWebView(mockAdaController),
-          ),
-        );
-
-        final state = tester.state<AdaWebViewState>(find.byType(AdaWebView));
-
-        expect(state.isInternalAdaUrl(Uri.parse('about:blank')), true);
-        expect(
-          state.isInternalAdaUrl(Uri.parse('https://$_handle.ada.support/asd')),
-          true,
-        );
-        expect(state.isInternalAdaUrl(Uri.parse(_embedUri)), true);
-
-        expect(state.isInternalAdaUrl(Uri.parse('google.com')), false);
-      },
-    );
-
     testWidgets(
       'GIVEN the widget is pumped '
       'WHEN onPageFinished is called '
@@ -108,6 +102,38 @@ void main() {
         });
       },
     );
+
+    testWidgets(
+      'GIVEN the widget is pumped '
+      'WHEN onNavigationRequest is called for external page '
+      'THEN should show customized webview',
+      (WidgetTester tester) async {
+        await tester.pumpWidget(
+          MaterialApp(
+            home: _buildAdaWebView(mockAdaController),
+          ),
+        );
+
+        final state = tester.state<AdaWebViewState>(find.byType(AdaWebView));
+
+        state.onNavigationRequest(
+          NavigationRequest(
+            url: 'https://external-page.com/index.html',
+            isMainFrame: true,
+          ),
+        );
+        await tester.pumpAndSettle();
+
+        expect(find.text(_title), findsOneWidget);
+        expect(
+          find.byWidgetPredicate(
+            (w) =>
+                w is CustomizedWebView && w.browserSettings == _browserSettings,
+          ),
+          findsOneWidget,
+        );
+      },
+    );
   });
 }
 
@@ -119,21 +145,6 @@ Widget _buildAdaWebView(_MockAdaController mockAdaController) {
     rolloutOverride: 1,
     language: 'en',
     metaFields: const {'key': 'value'},
-    browserSettings: BrowserSettings(
-      pageBuilder: (
-        context,
-        browser,
-        controller,
-      ) =>
-          Column(
-        children: [
-          Text(_title),
-          browser,
-        ],
-      ),
-      adaHideUrls: [
-        RegExp(_regexp),
-      ],
-    ),
+    browserSettings: _browserSettings,
   );
 }
diff --git a/packages/ada_chat_flutter/test/src/utils_test.dart b/packages/ada_chat_flutter/test/src/utils_test.dart
index 248fa672..dc0014f3 100644
--- a/packages/ada_chat_flutter/test/src/utils_test.dart
+++ b/packages/ada_chat_flutter/test/src/utils_test.dart
@@ -31,5 +31,82 @@ void main() {
         expect(getOsName, equals('N/A'));
       });
     });
+
+    group('isBlankPage tests - ', () {
+      test('isBlankPage returns true for about:blank', () {
+        expect(isBlankPage(Uri.parse('about:blank')), isTrue);
+      });
+
+      test('isBlankPage returns false for other URLs', () {
+        expect(isBlankPage(Uri.parse('https://example.com')), isFalse);
+      });
+    });
+
+    group('isAdaSupportLink tests - ', () {
+      const handle = 'test-handle';
+
+      test('isAdaSupportLink returns true for valid Ada support links', () {
+        expect(
+            isAdaSupportLink(
+                Uri.parse('https://test-handle.ada.support'), handle),
+            isTrue);
+      });
+
+      test('isAdaSupportLink returns false for invalid Ada support links', () {
+        expect(isAdaSupportLink(Uri.parse('https://example.com'), handle),
+            isFalse);
+      });
+    });
+
+    group('isAdaChatLink tests - ', () {
+      final embedUri = Uri.parse('https://example.com/embed.html');
+
+      test('isAdaChatLink returns true for matching embed URIs', () {
+        expect(isAdaChatLink(embedUri, embedUri), isTrue);
+      });
+
+      test('isAdaChatLink returns false for non-matching embed URIs', () {
+        expect(
+            isAdaChatLink(Uri.parse('https://example.com'), embedUri), isFalse);
+      });
+    });
+
+    group('isInternalAdaUrl tests - ', () {
+      final embedUri = Uri.parse('https://example.com/embed.html');
+      const handle = 'test-handle';
+
+      test('isInternalAdaUrl returns true for valid internal Ada URLs', () {
+        expect(isInternalAdaUrl(embedUri, embedUri, handle), isTrue);
+        expect(
+            isInternalAdaUrl(
+                Uri.parse('https://test-handle.ada.support'), embedUri, handle),
+            isTrue);
+        expect(isInternalAdaUrl(Uri.parse('about:blank'), embedUri, handle),
+            isTrue);
+      });
+
+      test('isInternalAdaUrl returns false for invalid internal Ada URLs', () {
+        expect(
+            isInternalAdaUrl(
+                Uri.parse('https://example.com'), embedUri, handle),
+            isFalse);
+      });
+    });
+
+    group('jsonStrToMap', () {
+      test('returns empty map for empty string', () {
+        expect(jsonStrToMap(''), isEmpty);
+        expect(jsonStrToMap(''), isA<Map<String, dynamic>>());
+      });
+
+      test('decodes valid JSON string to map', () {
+        const jsonString = '{"key1": "value1", "key2": 123}';
+        final result = jsonStrToMap(jsonString);
+
+        expect(result, isA<Map<String, dynamic>>());
+        expect(result['key1'], equals('value1'));
+        expect(result['key2'], equals(123));
+      });
+    });
   });
 }