diff --git a/android_webview/browser/aw_field_trials.cc b/android_webview/browser/aw_field_trials.cc
index f81fce6f..b80969b 100644
--- a/android_webview/browser/aw_field_trials.cc
+++ b/android_webview/browser/aw_field_trials.cc
@@ -108,7 +108,6 @@
   aw_feature_overrides.DisableFeature(blink::features::kFencedFrames);
 
   // Disable FLEDGE on WebView.
-  aw_feature_overrides.DisableFeature(network::features::kInterestGroupStorage);
   aw_feature_overrides.DisableFeature(blink::features::kAdInterestGroupAPI);
   aw_feature_overrides.DisableFeature(blink::features::kFledge);
 
diff --git a/chrome/browser/ash/bruschetta/bruschetta_network_context.cc b/chrome/browser/ash/bruschetta/bruschetta_network_context.cc
index cd7b0ecfc..c1956cb 100644
--- a/chrome/browser/ash/bruschetta/bruschetta_network_context.cc
+++ b/chrome/browser/ash/bruschetta/bruschetta_network_context.cc
@@ -275,10 +275,6 @@
   std::move(callback).Run();
 }
 
-void BruschettaNetworkContext::OnAdAuctionEventRecordHeaderReceived(
-    network::AdAuctionEventRecord event_record,
-    const std::optional<url::Origin>& top_frame_origin) {}
-
 void BruschettaNetworkContext::Clone(
     mojo::PendingReceiver<network::mojom::URLLoaderNetworkServiceObserver>
         observer) {
diff --git a/chrome/browser/ash/bruschetta/bruschetta_network_context.h b/chrome/browser/ash/bruschetta/bruschetta_network_context.h
index 73922b6..e396891b 100644
--- a/chrome/browser/ash/bruschetta/bruschetta_network_context.h
+++ b/chrome/browser/ash/bruschetta/bruschetta_network_context.h
@@ -93,9 +93,6 @@
           methods_with_options,
       const std::optional<std::string>& with_lock,
       OnSharedStorageHeaderReceivedCallback callback) override;
-  void OnAdAuctionEventRecordHeaderReceived(
-      network::AdAuctionEventRecord event_record,
-      const std::optional<url::Origin>& top_frame_origin) override;
   void Clone(
       mojo::PendingReceiver<network::mojom::URLLoaderNetworkServiceObserver>
           listener) override;
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index fcfa3bd..422f6d99f 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -3604,32 +3604,7 @@
                                                storage_key);
 }
 
-bool ChromeContentBrowserClient::IsInterestGroupAPIAllowed(
-    content::BrowserContext* browser_context,
-    content::RenderFrameHost* render_frame_host,
-    InterestGroupApiOperation operation,
-    const url::Origin& top_frame_origin,
-    const url::Origin& api_origin) {
-  Profile* profile = Profile::FromBrowserContext(browser_context);
-  auto* privacy_sandbox_settings =
-      PrivacySandboxSettingsFactory::GetForProfile(profile);
-  DCHECK(privacy_sandbox_settings);
 
-  bool allowed = privacy_sandbox_settings->IsFledgeAllowed(
-      top_frame_origin, api_origin, operation, render_frame_host);
-
-  if (operation == InterestGroupApiOperation::kJoin) {
-    content_settings::PageSpecificContentSettings::InterestGroupJoined(
-        render_frame_host, api_origin, !allowed);
-    content_settings::PageSpecificContentSettings::BrowsingDataAccessed(
-        render_frame_host,
-        content::InterestGroupManager::InterestGroupDataKey{api_origin,
-                                                            top_frame_origin},
-        BrowsingDataModel::StorageType::kInterestGroup, !allowed);
-  }
-
-  return allowed;
-}
 
 bool ChromeContentBrowserClient::IsPrivacySandboxReportingDestinationAttested(
     content::BrowserContext* browser_context,
@@ -3658,27 +3633,6 @@
       destination_origin, gated_api);
 }
 
-void ChromeContentBrowserClient::OnAuctionComplete(
-    content::RenderFrameHost* render_frame_host,
-    std::optional<content::InterestGroupManager::InterestGroupDataKey>
-        winner_data_key,
-    bool is_server_auction,
-    bool is_on_device_auction,
-    content::AuctionResult result) {
-  if (winner_data_key) {
-    content_settings::PageSpecificContentSettings::BrowsingDataAccessed(
-        render_frame_host, winner_data_key.value(),
-        BrowsingDataModel::StorageType::kInterestGroup,
-        /*blocked=*/false);
-  }
-  if (auto* observer =
-          page_load_metrics::MetricsWebContentsObserver::FromWebContents(
-              WebContents::FromRenderFrameHost(render_frame_host))) {
-    observer->OnAdAuctionComplete(render_frame_host, is_server_auction,
-                                  is_on_device_auction, result);
-  }
-}
-
 bool ChromeContentBrowserClient::IsSharedStorageAllowed(
     content::BrowserContext* browser_context,
     content::RenderFrameHost* rfh,
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index 1bb63d817..85e253f 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -397,22 +397,11 @@
       content::BrowserContext* browser_context,
       const std::vector<content::GlobalRenderFrameHostId>& render_frames,
       const blink::StorageKey& storage_key) override;
-  bool IsInterestGroupAPIAllowed(content::BrowserContext* browser_context,
-                                 content::RenderFrameHost* render_frame_host,
-                                 InterestGroupApiOperation operation,
-                                 const url::Origin& top_frame_origin,
-                                 const url::Origin& api_origin) override;
+
   bool IsPrivacySandboxReportingDestinationAttested(
       content::BrowserContext* browser_context,
       const url::Origin& destination_origin,
       content::PrivacySandboxInvokingAPI invoking_api) override;
-  void OnAuctionComplete(
-      content::RenderFrameHost* render_frame_host,
-      std::optional<content::InterestGroupManager::InterestGroupDataKey>
-          winner_data_key,
-      bool is_server_auction,
-      bool is_on_device_auction,
-      content::AuctionResult result) override;
   // TODO(crbug.com/369436599): Remove the default arguments in virtual methods.
   bool IsSharedStorageAllowed(
       content::BrowserContext* browser_context,
diff --git a/chrome/browser/privacy_sandbox/privacy_sandbox_service_factory.cc b/chrome/browser/privacy_sandbox/privacy_sandbox_service_factory.cc
index 10851db..46c6a74 100644
--- a/chrome/browser/privacy_sandbox/privacy_sandbox_service_factory.cc
+++ b/chrome/browser/privacy_sandbox/privacy_sandbox_service_factory.cc
@@ -83,7 +83,6 @@
   return std::make_unique<PrivacySandboxServiceImpl>(
       profile, PrivacySandboxSettingsFactory::GetForProfile(profile),
       CookieSettingsFactory::GetForProfile(profile), profile->GetPrefs(),
-      profile->GetDefaultStoragePartition()->GetInterestGroupManager(),
       GetProfileType(profile),
       (!profile->IsGuestSession() || profile->IsOffTheRecord())
           ? profile->GetBrowsingDataRemover()
diff --git a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.cc b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.cc
index 189a341..cc2d8fb 100644
--- a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.cc
+++ b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.cc
@@ -31,7 +31,6 @@
 #include "components/url_formatter/url_formatter.h"
 #include "content/public/browser/browsing_data_filter_builder.h"
 #include "content/public/browser/browsing_data_remover.h"
-#include "content/public/browser/interest_group_manager.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/base/schemeful_site.h"
 #include "net/first_party_sets/first_party_set_entry.h"
@@ -174,11 +173,6 @@
                          });
 }
 
-void RecordProtectedAudienceJoiningTopFrameDisplayedHistogram(bool value) {
-  base::UmaHistogramBoolean(
-      "PrivacySandbox.ProtectedAudience.JoiningTopFrameDisplayed", value);
-}
-
 // Emits startup histograms relating to the user's topics enabled status on
 // both client and profile level.
 void RecordTopicsEnabledHistograms(Profile* profile, bool enabled) {
@@ -230,7 +224,6 @@
     privacy_sandbox::PrivacySandboxSettings* privacy_sandbox_settings,
     scoped_refptr<content_settings::CookieSettings> cookie_settings,
     PrefService* pref_service,
-    content::InterestGroupManager* interest_group_manager,
     profile_metrics::BrowserProfileType profile_type,
     content::BrowsingDataRemover* browsing_data_remover,
     HostContentSettingsMap* host_content_settings_map,
@@ -241,7 +234,6 @@
       privacy_sandbox_settings_(privacy_sandbox_settings),
       cookie_settings_(cookie_settings),
       pref_service_(pref_service),
-      interest_group_manager_(interest_group_manager),
       profile_type_(profile_type),
       browsing_data_remover_(browsing_data_remover),
       host_content_settings_map_(host_content_settings_map),
@@ -316,7 +308,6 @@
   browsing_topics_service_ = nullptr;
   host_content_settings_map_ = nullptr;
   browsing_data_remover_ = nullptr;
-  interest_group_manager_ = nullptr;
   pref_service_ = nullptr;
   cookie_settings_ = nullptr;
   privacy_sandbox_settings_ = nullptr;
@@ -389,14 +380,7 @@
 
 void PrivacySandboxServiceImpl::GetFledgeJoiningEtldPlusOneForDisplay(
     base::OnceCallback<void(std::vector<std::string>)> callback) {
-  if (!interest_group_manager_) {
-    std::move(callback).Run({});
-    return;
-  }
-
-  interest_group_manager_->GetAllInterestGroupDataKeys(base::BindOnce(
-      &PrivacySandboxServiceImpl::ConvertInterestGroupDataKeysForDisplay,
-      weak_factory_.GetWeakPtr(), std::move(callback)));
+  std::move(callback).Run({});
 }
 
 std::vector<std::string>
@@ -473,49 +457,6 @@
   RecordAdMeasurementEnabledHistograms(profile_, ad_measurement_enabled);
 }
 
-void PrivacySandboxServiceImpl::ConvertInterestGroupDataKeysForDisplay(
-    base::OnceCallback<void(std::vector<std::string>)> callback,
-    std::vector<content::InterestGroupManager::InterestGroupDataKey>
-        data_keys) {
-  std::set<std::string> display_entries;
-  for (const auto& data_key : data_keys) {
-    // When displaying interest group information in settings, the joining
-    // origin is the relevant origin.
-    const auto& origin = data_key.joining_origin;
-
-    // Prefer to display the associated eTLD+1, if there is one.
-    auto etld_plus_one = net::registry_controlled_domains::GetDomainAndRegistry(
-        origin, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
-    if (etld_plus_one.length() > 0) {
-      display_entries.emplace(std::move(etld_plus_one));
-      RecordProtectedAudienceJoiningTopFrameDisplayedHistogram(true);
-      continue;
-    }
-
-    // The next best option is a host, which may be an IP address or an eTLD
-    // itself (e.g. github.io).
-    if (origin.host().length() > 0) {
-      display_entries.emplace(origin.host());
-      RecordProtectedAudienceJoiningTopFrameDisplayedHistogram(true);
-      continue;
-    }
-
-    // By design, each interest group should have a joining site or host, and
-    // so this could ideally be a NOTREACHED(). However, following
-    // crbug.com/40933994, it is apparent that this is not always true.
-    // A host or site is expected in other parts of the UI, so we cannot
-    // simply display the origin directly (it may also be empty). Instead, we
-    // elide it but record a metric to understand how widespread this is.
-    // TODO(crbug.com/40283983) - Investigate how much of an issue this is.
-    RecordProtectedAudienceJoiningTopFrameDisplayedHistogram(false);
-  }
-
-  // Entries should be displayed alphabetically, as |display_entries| is a
-  // std::set<std::string>, entries are already ordered correctly.
-  std::move(callback).Run(
-      std::vector<std::string>{display_entries.begin(), display_entries.end()});
-}
-
 std::vector<privacy_sandbox::CanonicalTopic>
 PrivacySandboxServiceImpl::GetCurrentTopTopics() const {
   if (pref_service_->GetBoolean(prefs::kPrivacySandboxM1TopicsEnabled) &&
diff --git a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.h b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.h
index fe259c4..7811cc7a 100644
--- a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.h
+++ b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl.h
@@ -21,7 +21,6 @@
 #include "components/privacy_sandbox/canonical_topic.h"
 #include "components/privacy_sandbox/privacy_sandbox_settings.h"
 #include "components/profile_metrics/browser_profile_type.h"
-#include "content/public/browser/interest_group_manager.h"
 #include "net/base/schemeful_site.h"
 
 class PrefService;
@@ -45,7 +44,6 @@
       privacy_sandbox::PrivacySandboxSettings* privacy_sandbox_settings,
       scoped_refptr<content_settings::CookieSettings> cookie_settings,
       PrefService* pref_service,
-      content::InterestGroupManager* interest_group_manager,
       profile_metrics::BrowserProfileType profile_type,
       content::BrowsingDataRemover* browsing_data_remover,
       HostContentSettingsMap* host_content_settings_map,
@@ -146,13 +144,6 @@
   // Called once per profile startup.
   void LogPrivacySandboxState();
 
-  // Converts the provided list of |top_frames| into eTLD+1s for display, and
-  // provides those to |callback|.
-  void ConvertInterestGroupDataKeysForDisplay(
-      base::OnceCallback<void(std::vector<std::string>)> callback,
-      std::vector<content::InterestGroupManager::InterestGroupDataKey>
-          data_keys);
-
   // Checks to see if initialization of the user's RWS pref is required, and if
   // so, sets the default value based on the user's current cookie settings.
   void MaybeInitializeRelatedWebsiteSetsPref();
@@ -174,7 +165,6 @@
   raw_ptr<privacy_sandbox::PrivacySandboxSettings> privacy_sandbox_settings_;
   scoped_refptr<content_settings::CookieSettings> cookie_settings_;
   raw_ptr<PrefService> pref_service_;
-  raw_ptr<content::InterestGroupManager> interest_group_manager_;
   profile_metrics::BrowserProfileType profile_type_;
   raw_ptr<content::BrowsingDataRemover> browsing_data_remover_;
   raw_ptr<HostContentSettingsMap> host_content_settings_map_;
diff --git a/components/browsing_data/content/browsing_data_model.cc b/components/browsing_data/content/browsing_data_model.cc
index c30b275..299c85c 100644
--- a/components/browsing_data/content/browsing_data_model.cc
+++ b/components/browsing_data/content/browsing_data_model.cc
@@ -39,7 +39,6 @@
 #include "services/network/public/mojom/network_context.mojom.h"
 #include "services/network/public/mojom/trust_tokens.mojom.h"
 #include "third_party/abseil-cpp/absl/functional/overload.h"
-#include "third_party/blink/public/common/interest_group/interest_group.h"
 #include "third_party/blink/public/common/storage_key/storage_key.h"
 #include "url/origin.h"
 #include "url/url_util.h"
@@ -50,8 +49,6 @@
 // imperceptible, but non-0 amount of space, such as Trust Tokens.
 constexpr int kSmallAmountOfDataInBytes = 100;
 
-// An estimate of storage size of an Interest Group object.
-constexpr int kModerateAmountOfDataInBytes = 1024;
 
 // Visitor which returns the appropriate data owner for a given `data_key`
 // and `storage_type`.
@@ -128,13 +125,6 @@
   return GetOwnerBasedOnScheme(session_storage_usage_info.storage_key.origin());
 }
 
-template <>
-BrowsingDataModel::DataOwner GetDataOwner::GetOwningOriginOrHost<
-    content::InterestGroupManager::InterestGroupDataKey>(
-    const content::InterestGroupManager::InterestGroupDataKey& data_key) const {
-  CHECK_EQ(BrowsingDataModel::StorageType::kInterestGroup, storage_type_);
-  return GetOwnerBasedOnScheme(data_key.owner);
-}
 
 template <>
 BrowsingDataModel::DataOwner
@@ -278,19 +268,6 @@
   }
 }
 
-template <>
-void StorageRemoverHelper::Visitor::operator()<
-    content::InterestGroupManager::InterestGroupDataKey>(
-    const content::InterestGroupManager::InterestGroupDataKey& data_key) {
-  CHECK(types.Has(BrowsingDataModel::StorageType::kInterestGroup));
-  helper->storage_partition_->GetInterestGroupManager()
-      ->RemoveInterestGroupsByDataKey(
-          data_key, base::BindOnce(
-                        [](base::OnceClosure complete_callback) {
-                          std::move(complete_callback).Run();
-                        },
-                        helper->GetCompleteCallback()));
-}
 
 template <>
 void StorageRemoverHelper::Visitor::operator()<
@@ -408,18 +385,6 @@
 }
 
 
-void OnInterestGroupsLoaded(
-    BrowsingDataModel* model,
-    base::OnceClosure loaded_callback,
-    std::vector<content::InterestGroupManager::InterestGroupDataKey>
-        interest_groups) {
-  for (const auto& data_key : interest_groups) {
-    model->AddBrowsingData(data_key,
-                           BrowsingDataModel::StorageType::kInterestGroup,
-                           kModerateAmountOfDataInBytes);
-  }
-  std::move(loaded_callback).Run();
-}
 
 void OnQuotaStorageLoaded(
     BrowsingDataModel* model,
@@ -513,7 +478,6 @@
   std::visit(
       absl::Overload{
           [&](const url::Origin&) {},
-          [&](const content::InterestGroupManager::InterestGroupDataKey) {},
           [&](const blink::StorageKey& storage_key) {
             if (storage_key.IsThirdPartyContext()) {
               top_level_site = storage_key.top_level_site();
@@ -583,8 +547,6 @@
   return std::visit(
       absl::Overload{
           [](const url::Origin& origin) { return origin; },
-          [](const content::InterestGroupManager::InterestGroupDataKey
-                 interest_group_key) { return interest_group_key.owner; },
           [](const blink::StorageKey& storage_key) {
             return storage_key.origin();
           },
@@ -854,7 +816,6 @@
 
   switch (storage_type) {
     case BrowsingDataModel::StorageType::kTrustTokens:
-    case BrowsingDataModel::StorageType::kInterestGroup:
     case BrowsingDataModel::StorageType::kSharedDictionary:
       return false;
... (file diff truncated)

diff --git a/chrome/browser/browsing_data/browsing_data_model_browsertest.cc b/chrome/browser/browsing_data/browsing_data_model_browsertest.cc
index 332214e..af3166e 100644
--- a/chrome/browser/browsing_data/browsing_data_model_browsertest.cc
+++ b/chrome/browser/browsing_data/browsing_data_model_browsertest.cc
@@ -386,9 +386,6 @@
         {features::kIsolatedWebApps, {}},
         {features::kIsolatedWebAppDevMode, {}},
         {network::features::kSharedStorageAPI, {}},
-        {network::features::kInterestGroupStorage, {}},
-        {blink::features::kAdInterestGroupAPI, {}},
-        {blink::features::kFledge, {}},
         {blink::features::kFencedFrames, {}},
         {network::features::kBrowsingTopics, {}},
         {net::features::kThirdPartyStoragePartitioning, {}},
diff --git a/chrome/browser/browsing_data/chrome_browsing_data_remover_delegate_unittest.cc b/chrome/browser/browsing_data/chrome_browsing_data_remover_delegate_unittest.cc
index 30c8266..d59988f0 100644
--- a/chrome/browser/browsing_data/chrome_browsing_data_remover_delegate_unittest.cc
+++ b/chrome/browser/browsing_data/chrome_browsing_data_remover_delegate_unittest.cc
@@ -3370,74 +3370,6 @@
                          net::NetworkAnonymizationKey()));
 }
 
-TEST_F(ChromeBrowsingDataRemoverDelegateTest, RemoveFledgeJoinSettings) {
-  auto* privacy_sandbox_settings =
-      PrivacySandboxSettingsFactory::GetForProfile(GetProfile());
-  privacy_sandbox_settings->SetAllPrivacySandboxAllowedForTesting();
-
-  privacy_sandbox::ScopedPrivacySandboxAttestations scoped_attestations(
-      privacy_sandbox::PrivacySandboxAttestations::CreateForTesting());
-  // Mark all Privacy Sandbox APIs as attested since the test case is testing
-  // behaviors not related to attestations.
-  privacy_sandbox::PrivacySandboxAttestations::GetInstance()
-      ->SetAllPrivacySandboxAttestedForTesting(true);
-
-  auto auction_party = url::Origin::Create(GURL("https://auction-party.com"));
-
-  const std::string etld_one = "example.com";
-  base::Time setting_time_one = base::Time::Now();
-  privacy_sandbox_settings->SetFledgeJoiningAllowed(etld_one, false);
-  task_environment()->AdvanceClock(base::Days(1));
-
-  const std::string etld_two = "another-example.com";
-  base::Time setting_time_two = base::Time::Now();
-  privacy_sandbox_settings->SetFledgeJoiningAllowed(etld_two, false);
-  task_environment()->AdvanceClock(base::Days(1));
-
-  const std::string etld_three = "different-example.com";
-  base::Time setting_time_three = base::Time::Now();
-  privacy_sandbox_settings->SetFledgeJoiningAllowed(etld_three, false);
-
-  EXPECT_FALSE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://www.example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_FALSE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://another-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_FALSE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("http://different-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-
-  // Apply a deletion targeting the second setting.
-  BlockUntilBrowsingDataRemoved(setting_time_two - base::Seconds(1),
-                                setting_time_two + base::Seconds(1),
-                                constants::DATA_TYPE_CONTENT_SETTINGS, false);
-
-  EXPECT_FALSE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://www.example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_TRUE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://another-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_FALSE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("http://different-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-
-  // Apply a deletion targeting the remaining settings.
-  BlockUntilBrowsingDataRemoved(setting_time_one, setting_time_three,
-                                constants::DATA_TYPE_CONTENT_SETTINGS, false);
-
-  EXPECT_TRUE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://www.example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_TRUE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("https://another-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-  EXPECT_TRUE(privacy_sandbox_settings->IsFledgeAllowed(
-      url::Origin::Create(GURL("http://different-example.com")), auction_party,
-      content::InterestGroupApiOperation::kJoin));
-}
-
 TEST_F(ChromeBrowsingDataRemoverDelegateTest, RemoveTopicSettings) {
   auto* privacy_sandbox_settings =
       PrivacySandboxSettingsFactory::GetForProfile(GetProfile());
diff --git a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl_unittest.cc b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl_unittest.cc
index 3c7984915..3ea27e3 100644
--- a/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl_unittest.cc
+++ b/chrome/browser/privacy_sandbox/privacy_sandbox_service_impl_unittest.cc
@@ -51,7 +51,6 @@
 #include "components/sync_preferences/testing_pref_service_syncable.h"
 #include "content/public/browser/browsing_data_remover.h"
 #include "content/public/browser/first_party_sets_handler.h"
-#include "content/public/browser/interest_group_manager.h"
 #include "content/public/test/browser_task_environment.h"
 #include "net/base/schemeful_site.h"
 #include "net/first_party_sets/first_party_set_entry.h"
@@ -136,39 +135,6 @@
   raw_ptr<PrivacySandboxService> service_;
 };
 
-class TestInterestGroupManager : public content::InterestGroupManager {
- public:
-  void SetInterestGroupDataKeys(
-      const std::vector<InterestGroupDataKey>& data_keys) {
-    data_keys_ = data_keys;
-  }
-
-  // content::InterestGroupManager:
-  void GetAllInterestGroupJoiningOrigins(
-      base::OnceCallback<void(std::vector<url::Origin>)> callback) override {
-    NOTREACHED();
-  }
-  void GetAllInterestGroupDataKeys(
-      base::OnceCallback<void(std::vector<InterestGroupDataKey>)> callback)
-      override {
-    std::move(callback).Run(data_keys_);
-  }
-  void RemoveInterestGroupsByDataKey(InterestGroupDataKey data_key,
-                                     base::OnceClosure callback) override {
-    NOTREACHED();
-  }
-  void AddTrustedServerKeysDebugOverride(
-      TrustedServerAPIType api,
-      const url::Origin& coordinator,
-      std::string serialized_keys,
-      base::OnceCallback<void(std::optional<std::string>)> callback) override {
-    NOTREACHED();
-  }
-
- private:
-  std::vector<InterestGroupDataKey> data_keys_;
-};
-
 // Remove any user preference settings for Related Website Set related
 // preferences, returning them to their default value.
 void ClearRwsUserPrefs(
@@ -441,9 +407,6 @@
   content_settings::CookieSettings* cookie_settings() {
     return CookieSettingsFactory::GetForProfile(profile()).get();
   }
-  TestInterestGroupManager* test_interest_group_manager() {
-    return &test_interest_group_manager_;
-  }
   content::BrowsingDataRemover* browsing_data_remover() {
     return profile()->GetBrowsingDataRemover();
   }
@@ -495,10 +458,9 @@
       content::BrowserContext* context) {
     return std::make_unique<PrivacySandboxServiceImpl>(
         profile(), privacy_sandbox_settings(), cookie_settings(),
-        profile()->GetPrefs(), test_interest_group_manager(), GetProfileType(),
-        browsing_data_remover(), host_content_settings_map(),
-        mock_browsing_topics_service(), first_party_sets_policy_service(),
-        mock_privacy_sandbox_countries());
+        profile()->GetPrefs(), GetProfileType(), browsing_data_remover(),
+        host_content_settings_map(), mock_browsing_topics_service(),
+        first_party_sets_policy_service(), mock_privacy_sandbox_countries());
   }
 
   content::BrowserTaskEnvironment browser_task_environment_;
@@ -514,7 +476,6 @@
 
   base::test::ScopedFeatureList outer_feature_list_;
   base::test::ScopedFeatureList inner_feature_list_;
-  TestInterestGroupManager test_interest_group_manager_;
   browsing_topics::MockBrowsingTopicsService mock_browsing_topics_service_;
 
   first_party_sets::ScopedMockFirstPartySetsHandler
@@ -662,98 +623,6 @@
   ASSERT_EQ(should_use_china_domain, false);
 }
 
-TEST_F(PrivacySandboxServiceTest, GetFledgeJoiningEtldPlusOne) {
-  // Confirm that the set of FLEDGE origins which were top-frame for FLEDGE join
-  // actions is correctly converted into a list of eTLD+1s.
-
-  using FledgeTestCase =
-      std::pair<std::vector<url::Origin>, std::vector<std::string>>;
-
-  // Items which map to the same eTLD+1 should be coalesced into a single entry.
-  FledgeTestCase test_case_1 = {
-      {url::Origin::Create(GURL("https://www.example.com")),
-       url::Origin::Create(GURL("https://example.com:8080")),
-       url::Origin::Create(GURL("http://www.example.com"))},
-      {"example.com"}};
-
-  // eTLD's should return the host instead, this is relevant for sites which
-  // are themselves on the PSL, e.g. github.io.
-  FledgeTestCase test_case_2 = {
-      {
-          url::Origin::Create(GURL("https://co.uk")),
-          url::Origin::Create(GURL("http://co.uk")),
-          url::Origin::Create(GURL("http://example.co.uk")),
-      },
-      {"co.uk", "example.co.uk"}};
-
-  // IP addresses should also return the host.
-  FledgeTestCase test_case_3 = {
-      {
-          url::Origin::Create(GURL("https://192.168.1.2")),
-          url::Origin::Create(GURL("https://192.168.1.2:8080")),
-          url::Origin::Create(GURL("https://192.168.1.3:8080")),
-      },
-      {"192.168.1.2", "192.168.1.3"}};
-
-  // Results should be alphabetically ordered.
-  FledgeTestCase test_case_4 = {{
-                                    url::Origin::Create(GURL("https://d.com")),
-                                    url::Origin::Create(GURL("https://b.com")),
-                                    url::Origin::Create(GURL("https://a.com")),
-                                    url::Origin::Create(GURL("https://c.com")),
-                                },
-                                {"a.com", "b.com", "c.com", "d.com"}};
-
-  std::vector<FledgeTestCase> test_cases = {test_case_1, test_case_2,
-                                            test_case_3, test_case_4};
-
-  for (const auto& [origins, expected] : test_cases) {
-    base::HistogramTester histogram_tester;
-    test_interest_group_manager()->SetInterestGroupDataKeys(
-        base::ToVector(origins, [](const auto& origin) {
-          return content::InterestGroupManager::InterestGroupDataKey{
-              url::Origin::Create(GURL("https://embedded.com")), origin};
-        }));
-
-    bool callback_called = false;
-    auto callback = base::BindLambdaForTesting(
-        [&](std::vector<std::string> items_for_display) {
-          ASSERT_EQ(items_for_display.size(), expected.size());
-          for (size_t i = 0; i < items_for_display.size(); i++) {
-            EXPECT_EQ(expected[i], items_for_display[i]);
-          }
-          callback_called = true;
-        });
-
-    privacy_sandbox_service()->GetFledgeJoiningEtldPlusOneForDisplay(callback);
-    EXPECT_TRUE(callback_called);
-    histogram_tester.ExpectUniqueSample(
-        "PrivacySandbox.ProtectedAudience.JoiningTopFrameDisplayed", true,
-        origins.size());
-  }
-}
-
-TEST_F(PrivacySandboxServiceTest, GetFledgeJoiningEtldPlusOne_InvalidTopFrame) {
-  // Confirm that when an invalid top frame is received, the appropriate metric
-  // is recorded, and the returned list is empty.
-  base::HistogramTester histogram_tester;
-  auto missing_top_frame = content::InterestGroupManager::InterestGroupDataKey{
-      url::Origin::Create(GURL("https://embedded.com")), url::Origin()};
-  test_interest_group_manager()->SetInterestGroupDataKeys({missing_top_frame});
-
-  bool callback_called = false;
-  auto callback = base::BindLambdaForTesting(
-      [&](std::vector<std::string> items_for_display) {
-        ASSERT_EQ(items_for_display.size(), 0u);
-        callback_called = true;
-      });
-
-  privacy_sandbox_service()->GetFledgeJoiningEtldPlusOneForDisplay(callback);
-  EXPECT_TRUE(callback_called);
-  histogram_tester.ExpectUniqueSample(
-      "PrivacySandbox.ProtectedAudience.JoiningTopFrameDisplayed", false, 1);
-}
-
 TEST_F(PrivacySandboxServiceTest, GetFledgeBlockedEtldPlusOne) {
   // Confirm that blocked FLEDGE top frame eTLD+1's are correctly produced
   // for display.
diff --git a/components/browsing_data/content/browsing_data_model_unittest.cc b/components/browsing_data/content/browsing_data_model_unittest.cc
index cd6b47d..94ef257c 100644
--- a/components/browsing_data/content/browsing_data_model_unittest.cc
+++ b/components/browsing_data/content/browsing_data_model_unittest.cc
@@ -588,8 +588,6 @@
   auto partitioned_shared_dictionary_key = net::SharedDictionaryIsolationKey{
       kSiteOrigin, net::SchemefulSite(kTestOrigin)};
 
-  content::InterestGroupManager::InterestGroupDataKey interest_group_key{
-      kSiteOrigin, kSiteOrigin};
   net::device_bound_sessions::SessionKey device_bound_session_key(
       net::SchemefulSite(kSiteOrigin.GetURL()),
       net::device_bound_sessions::SessionKey::Id("session_id"));
@@ -626,7 +624,6 @@
            partitioned_shared_worker_info},
           {BrowsingDataModel::StorageType::kCookie, *partitioned_cookie},
           {BrowsingDataModel::StorageType::kTrustTokens, kSiteOrigin},
-          {BrowsingDataModel::StorageType::kInterestGroup, interest_group_key},
           {BrowsingDataModel::StorageType::kSharedDictionary,
            partitioned_shared_dictionary_key}};
diff --git a/components/privacy_sandbox/privacy_sandbox_test_util_unittest.cc b/components/privacy_sandbox/privacy_sandbox_test_util_unittest.cc
index 815f8d8..fde869c7 100644
--- a/components/privacy_sandbox/privacy_sandbox_test_util_unittest.cc
+++ b/components/privacy_sandbox/privacy_sandbox_test_util_unittest.cc
... (truncated)