diff --git a/chromium_src/chrome/browser/ui/views/web_apps/web_app_detailed_install_dialog.cc b/chromium_src/chrome/browser/ui/views/web_apps/web_app_detailed_install_dialog.cc
new file mode 100644
index 00000000000..556b938ad49
--- /dev/null
+++ b/chromium_src/chrome/browser/ui/views/web_apps/web_app_detailed_install_dialog.cc
@@ -0,0 +1,14 @@
+// Copyright (c) 2025 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#include "ui/base/models/dialog_model.h"
+
+// Change the default button from kCancel to kOk
+#define OverrideDefaultButton(__VA_ARGS__) \
+  OverrideDefaultButton(ui::mojom::DialogButton::kOk)
+
+#include "src/chrome/browser/ui/views/web_apps/web_app_detailed_install_dialog.cc"
+
+#undef OverrideDefaultButton
diff --git a/chromium_src/chrome/browser/ui/views/web_apps/web_app_diy_install_dialog.cc b/chromium_src/chrome/browser/ui/views/web_apps/web_app_diy_install_dialog.cc
new file mode 100644
index 00000000000..dc627ca18e9
--- /dev/null
+++ b/chromium_src/chrome/browser/ui/views/web_apps/web_app_diy_install_dialog.cc
@@ -0,0 +1,14 @@
+// Copyright (c) 2025 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#include "ui/base/models/dialog_model.h"
+
+// Change the default button from kCancel to kOk
+#define OverrideDefaultButton(__VA_ARGS__) \
+  OverrideDefaultButton(ui::mojom::DialogButton::kOk)
+
+#include "src/chrome/browser/ui/views/web_apps/web_app_diy_install_dialog.cc"
+
+#undef OverrideDefaultButton
diff --git a/chromium_src/chrome/browser/ui/views/web_apps/web_app_simple_install_dialog.cc b/chromium_src/chrome/browser/ui/views/web_apps/web_app_simple_install_dialog.cc
new file mode 100644
index 00000000000..ed192ad62d4
--- /dev/null
+++ b/chromium_src/chrome/browser/ui/views/web_apps/web_app_simple_install_dialog.cc
@@ -0,0 +1,14 @@
+// Copyright (c) 2025 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#include "ui/base/models/dialog_model.h"
+
+// Change the default button from kCancel to kOk
+#define OverrideDefaultButton(__VA_ARGS__) \
+  OverrideDefaultButton(ui::mojom::DialogButton::kOk)
+
+#include "src/chrome/browser/ui/views/web_apps/web_app_simple_install_dialog.cc"
+
+#undef OverrideDefaultButton