[PSST] Show infobar when the feature availability is detected for the website

android/android_browser_tests.gni

@@ -82,7 +82,6 @@ android_test_exception_deps = [
   "//brave/browser/farbling:browser_tests",
   "//brave/browser/net:browser_tests",
   "//brave/browser/permissions:browser_tests",
-  "//brave/browser/psst:browser_tests",
   "//brave/browser/test:browser_tests",
   "//brave/browser/ui:browser_tests",
   "//brave/browser/ui/tabs/test:browser_tests",

app/brave_generated_resources.grd

@@ -1435,6 +1435,14 @@ Or change later at <ph name="SETTINGS_EXTENIONS_LINK">$2<ex>brave://settings/ext
         Enable
       </message>
 
+      <!--PSST -->
+      <message name="IDS_BRAVE_PSST_INFOBAR_MESSAGE" desc="The text label of PSST availability announcement.">
+        Brave can help you optimize this site's privacy settings. Would you like to review our suggestions?
+      </message>
+      <message name="IDS_BRAVE_PSST_INFO_BAR_REVIEW_SUGGESTIONS" desc="OK button that shows on the info bar and allows to start review of the PSST suggestions">
+        Review suggestions
+      </message>
+
       <!-- Brave policy -->
       <message name="IDS_BRAVE_CONTROLLED_SETTING_POLICY" desc="Text displayed in the controlled settings bubble when a setting's value is managed by policy.">
         This setting is managed by your administrator or by another Brave policy.

brave_paks.gni

@@ -5,6 +5,7 @@
 
 import("//brave/components/ai_chat/core/common/buildflags/buildflags.gni")
 import("//brave/components/brave_rewards/core/buildflags/buildflags.gni")
+import("//brave/components/psst/buildflags/buildflags.gni")
 import("//brave/components/tor/buildflags/buildflags.gni")
 import("//build/config/locales.gni")
 import("//chrome/common/features.gni")

browser/psst/BUILD.gn

@@ -7,11 +7,15 @@ static_library("psst") {
   public = [
     "psst_settings_service_factory.h",
     "psst_ui_delegate_impl.h",
+    "psst_ui_presenter.h",
   ]
 
   sources = [
+    "psst_infobar_delegate.cc",
+    "psst_infobar_delegate.h",
     "psst_settings_service_factory.cc",
     "psst_ui_delegate_impl.cc",
+    "psst_ui_presenter.cc",
   ]
 
   deps = [
@@ -22,9 +26,14 @@ static_library("psst") {
     "//brave/components/psst/browser/core",
     "//brave/components/psst/common",
     "//chrome/browser/content_settings:content_settings_factory",
+    "//chrome/browser/infobars",
     "//chrome/browser/profiles",
+    "//chrome/browser/ui/webui",
     "//components/content_settings/core/browser",
+    "//components/infobars/content",
+    "//components/infobars/core",
     "//components/permissions",
+    "//ui/web_dialogs",
   ]
 }
 
@@ -46,31 +55,3 @@ source_set("unit_tests") {
     "//url",
   ]
 }
-
-source_set("browser_tests") {
-  testonly = true
-  defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
-
-  sources = [ "psst_tab_web_contents_observer_browsertest.cc" ]
-
-  deps = [
-    "//base",
-    "//brave/components/brave_shields/content/browser",
-    "//brave/components/cosmetic_filters/browser",
-    "//brave/components/psst/browser/content",
-    "//brave/components/psst/browser/core",
-    "//brave/components/psst/buildflags",
-    "//brave/components/psst/common",
-    "//chrome/test:test_support",
-    "//components/component_updater:test_support",
-    "//content/test:test_support",
-    "//net:test_support",
-    "//url",
-  ]
-
-  if (is_android) {
-    deps += [ "//chrome/test:test_support_ui_android" ]
-  } else {
-    deps += [ "//chrome/test:test_support_ui" ]
-  }
-}

browser/psst/psst_infobar_delegate.cc

@@ -0,0 +1,64 @@
+// Copyright (c) 2026 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 "brave/browser/psst/psst_infobar_delegate.h"
+
+#include <memory>
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "brave/grit/brave_generated_resources.h"
+#include "chrome/browser/infobars/confirm_infobar_creator.h"
+#include "components/infobars/core/infobar.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace psst {
+// static
+void PsstInfoBarDelegate::Create(infobars::InfoBarManager* infobar_manager,
+                                 AcceptCallback on_accept_callback) {
+  infobar_manager->AddInfoBar(
+      CreateConfirmInfoBar(base::WrapUnique<PsstInfoBarDelegate>(
+          new PsstInfoBarDelegate(std::move(on_accept_callback)))));
+}
+
+PsstInfoBarDelegate::PsstInfoBarDelegate(AcceptCallback on_accept_callback)
+    : on_accept_callback_(std::move(on_accept_callback)) {}
+
+PsstInfoBarDelegate::~PsstInfoBarDelegate() = default;
+
+infobars::InfoBarDelegate::InfoBarIdentifier
+PsstInfoBarDelegate::GetIdentifier() const {
+  return BRAVE_PSST_INFOBAR_DELEGATE;
+}
+
+std::u16string PsstInfoBarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_BRAVE_PSST_INFOBAR_MESSAGE);
+}
+
+int PsstInfoBarDelegate::GetButtons() const {
+  return BUTTON_OK;
+}
+
+std::u16string PsstInfoBarDelegate::GetButtonLabel(InfoBarButton button) const {
+  return l10n_util::GetStringUTF16(IDS_BRAVE_PSST_INFO_BAR_REVIEW_SUGGESTIONS);
+}
+
+bool PsstInfoBarDelegate::Accept() {
+  if (on_accept_callback_) {
+    std::move(on_accept_callback_).Run(true);
+  }
+
+  return true;
+}
+
+bool PsstInfoBarDelegate::Cancel() {
+  if (on_accept_callback_) {
+    std::move(on_accept_callback_).Run(false);
+  }
+
+  return true;
+}
+
+}  // namespace psst

browser/psst/psst_infobar_delegate.h

@@ -0,0 +1,43 @@
+// Copyright (c) 2026 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/.
+
+#ifndef BRAVE_BROWSER_PSST_PSST_INFOBAR_DELEGATE_H_
+#define BRAVE_BROWSER_PSST_PSST_INFOBAR_DELEGATE_H_
+
+#include "base/functional/callback.h"
+#include "base/functional/callback_forward.h"
+#include "components/infobars/core/confirm_infobar_delegate.h"
+
+namespace psst {
+
+class PsstInfoBarDelegate : public ConfirmInfoBarDelegate {
+ public:
+  using AcceptCallback = base::OnceCallback<void(const bool is_accepted)>;
+  static void Create(infobars::InfoBarManager* infobar_manager,
+                     AcceptCallback on_accept_callback);
+
+  PsstInfoBarDelegate(const PsstInfoBarDelegate&) = delete;
+  PsstInfoBarDelegate& operator=(const PsstInfoBarDelegate&) = delete;
+
+  ~PsstInfoBarDelegate() override;
+
+  bool Accept() override;
+  bool Cancel() override;
+
+ private:
+  explicit PsstInfoBarDelegate(AcceptCallback on_accept_callback);
+
+  // BraveConfirmInfoBarDelegate overrides:
+  infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
+  std::u16string GetMessageText() const override;
+  int GetButtons() const override;
+  std::u16string GetButtonLabel(InfoBarButton button) const override;
+
+  AcceptCallback on_accept_callback_;
+};
+
+}  // namespace psst
+
+#endif  // BRAVE_BROWSER_PSST_PSST_INFOBAR_DELEGATE_H_