diff --git a/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.cc b/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.cc
index 2a8ec937b418..ddf16392c99d 100644
--- a/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.cc
+++ b/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.cc
@@ -10,7 +10,7 @@
 #include <string>
 #include <utility>
 
-#include "base/check_op.h"
+#include "base/check.h"
 #include "base/time/time.h"
 #include "bat/ads/ads.h"
 #include "bat/ads/internal/ads_client_helper.h"
@@ -19,14 +19,12 @@
 #include "bat/ads/internal/base/time/time_formatting_util.h"
 #include "bat/ads/internal/base/url/url_request_string_util.h"
 #include "bat/ads/internal/base/url/url_response_string_util.h"
-#include "bat/ads/internal/browser/browser_manager.h"
 #include "bat/ads/internal/catalog/catalog_constants.h"
 #include "bat/ads/internal/catalog/catalog_info.h"
 #include "bat/ads/internal/catalog/catalog_json_reader.h"
 #include "bat/ads/internal/catalog/catalog_url_request_builder.h"
 #include "bat/ads/internal/catalog/catalog_util.h"
 #include "bat/ads/internal/database/database_manager.h"
-#include "bat/ads/internal/user_interaction/idle_detection/idle_detection_manager.h"
 
 namespace ads {
 
@@ -39,15 +37,11 @@ constexpr base::TimeDelta kDebugCatalogPing = base::Minutes(15);
 }  // namespace
 
 Catalog::Catalog() {
-  BrowserManager::GetInstance()->AddObserver(this);
   DatabaseManager::GetInstance()->AddObserver(this);
-  IdleDetectionManager::GetInstance()->AddObserver(this);
 }
 
 Catalog::~Catalog() {
-  BrowserManager::GetInstance()->RemoveObserver(this);
   DatabaseManager::GetInstance()->RemoveObserver(this);
-  IdleDetectionManager::GetInstance()->RemoveObserver(this);
 }
 
 void Catalog::AddObserver(CatalogObserver* observer) {
@@ -182,24 +176,9 @@ void Catalog::NotifyFailedToUpdateCatalog() const {
   }
 }
 
-void Catalog::OnBrowserDidEnterForeground() {
-  if (HasCatalogExpired()) {
-    MaybeFetch();
-  }
-}
-
 void Catalog::OnDidMigrateDatabase(const int from_version,
                                    const int to_version) {
-  DCHECK_NE(from_version, to_version);
-
   ResetCatalog();
 }
 
-void Catalog::OnUserDidBecomeActive(const base::TimeDelta idle_time,
-                                    const bool was_locked) {
-  if (HasCatalogExpired()) {
-    MaybeFetch();
-  }
-}
-
 }  // namespace ads
diff --git a/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.h b/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.h
index cee27b12f2c9..fedfbe633114 100644
--- a/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.h
+++ b/vendor/bat-native-ads/src/bat/ads/internal/catalog/catalog.h
@@ -9,10 +9,8 @@
 #include "base/observer_list.h"
 #include "bat/ads/internal/base/timer/backoff_timer.h"
 #include "bat/ads/internal/base/timer/timer.h"
-#include "bat/ads/internal/browser/browser_manager_observer.h"
 #include "bat/ads/internal/catalog/catalog_observer.h"
 #include "bat/ads/internal/database/database_manager_observer.h"
-#include "bat/ads/internal/user_interaction/idle_detection/idle_detection_manager_observer.h"
 #include "bat/ads/public/interfaces/ads.mojom.h"
 
 namespace base {
@@ -23,9 +21,7 @@ namespace ads {
 
 struct CatalogInfo;
 
-class Catalog final : public BrowserManagerObserver,
-                      public DatabaseManagerObserver,
-                      public IdleDetectionManagerObserver {
+class Catalog final : public DatabaseManagerObserver {
  public:
   Catalog();
   Catalog(const Catalog&) = delete;
@@ -48,17 +44,10 @@ class Catalog final : public BrowserManagerObserver,
   void NotifyDidUpdateCatalog(const CatalogInfo& catalog) const;
   void NotifyFailedToUpdateCatalog() const;
 
-  // BrowserManagerObserver:
-  void OnBrowserDidEnterForeground() override;
-
   // DatabaseManagerObserver:
   void OnDidMigrateDatabase(const int from_version,
                             const int to_version) override;
 
-  // IdleDetectionManagerObserver:
-  void OnUserDidBecomeActive(const base::TimeDelta idle_time,
-                             const bool was_locked) override;
-
   base::ObserverList<CatalogObserver> observers_;
 
   bool is_processing_ = false;
diff --git a/vendor/bat-native-ads/src/bat/ads/internal/database/database_manager.cc b/vendor/bat-native-ads/src/bat/ads/internal/database/database_manager.cc
index 6b12b33df754..abc283fb876b 100644
--- a/vendor/bat-native-ads/src/bat/ads/internal/database/database_manager.cc
+++ b/vendor/bat-native-ads/src/bat/ads/internal/database/database_manager.cc
@@ -8,7 +8,7 @@
 #include <functional>
 #include <utility>
 
-#include "base/check.h"
+#include "base/check_op.h"
 #include "bat/ads/internal/ads_client_helper.h"
 #include "bat/ads/internal/base/logging_util.h"
 #include "bat/ads/internal/legacy_migration/database/database_constants.h"
@@ -157,6 +157,8 @@ void DatabaseManager::NotifyWillMigrateDatabase(const int from_version,
 
 void DatabaseManager::NotifyDidMigrateDatabase(const int from_version,
                                                const int to_version) const {
+  DCHECK_NE(from_version, to_version);
+
   for (DatabaseManagerObserver& observer : observers_) {
     observer.OnDidMigrateDatabase(from_version, to_version);
   }