Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

47 files changed, 7072 insertions, 0 deletions

diff --git a/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp b/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp
new file mode 100644
index 0000000000..4dfb7224e7
--- /dev/null
+++ b/netwerk/url-classifier/AsyncUrlChannelClassifier.cpp
@@ -0,0 +1,920 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set expandtab ts=4 sw=2 sts=2 cin: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "Classifier.h"
+#include "mozilla/Components.h"
+#include "mozilla/ErrorNames.h"
+#include "mozilla/net/AsyncUrlChannelClassifier.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+#include "mozilla/net/UrlClassifierFeatureResult.h"
+#include "nsContentUtils.h"
+#include "nsIChannel.h"
+#include "nsIHttpChannel.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsPrintfCString.h"
+#include "nsProxyRelease.h"
+#include "nsServiceManagerUtils.h"
+#include "nsUrlClassifierDBService.h"
+#include "nsUrlClassifierUtils.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+// Big picture comment
+// -----------------------------------------------------------------------------
+// nsUrlClassifierDBService::channelClassify() classifies a channel using a set
+// of URL-Classifier features. This method minimizes the number of lookups and
+// URI parsing and this is done using the classes here described.
+//
+// The first class is 'FeatureTask' which is able to retrieve the list of
+// features for this channel using the feature-factory. See
+// UrlClassifierFeatureFactory.
+// For each feature, it creates a FeatureData object, which contains the
+// entitylist and blocklist prefs and tables. The reason why we create
+// FeatureData is because:
+// - features are not thread-safe.
+// - we want to store the state of the classification in the FeatureData
+//   object.
+//
+// It can happen that multiple features share the same tables. In order to do
+// the lookup just once, we have TableData class. When multiple features
+// contain the same table, they have references to the same couple TableData +
+// URIData objects.
+//
+// During the classification, the channel's URIs are fragmented. In order to
+// create these fragments just once, we use the URIData class, which is pointed
+// by TableData classes.
+//
+// The creation of these classes happens on the main-thread. The classification
+// happens on the worker thread.
+
+// URIData
+// -----------------------------------------------------------------------------
+
+// In order to avoid multiple URI parsing, we have this class which contains
+// nsIURI and its fragments.
+class URIData {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(URIData);
+
+  static nsresult Create(nsIURI* aURI, nsIURI* aInnermostURI,
+                         nsIUrlClassifierFeature::URIType aURIType,
+                         URIData** aData);
+
+  bool IsEqual(nsIURI* aURI) const;
+
+  const nsTArray<nsCString>& Fragments();
+
+  nsIURI* URI() const;
+
+ private:
+  URIData();
+  ~URIData() = default;
+
+  nsCOMPtr<nsIURI> mURI;
+  nsCString mURISpec;
+  nsTArray<nsCString> mFragments;
+  nsIUrlClassifierFeature::URIType mURIType;
+};
+
+/* static */
+nsresult URIData::Create(nsIURI* aURI, nsIURI* aInnermostURI,
+                         nsIUrlClassifierFeature::URIType aURIType,
+                         URIData** aData) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aURI);
+  MOZ_ASSERT(aInnermostURI);
+
+  RefPtr<URIData> data = new URIData();
+  data->mURI = aURI;
+  data->mURIType = aURIType;
+
+  nsUrlClassifierUtils* utilsService = nsUrlClassifierUtils::GetInstance();
+  if (NS_WARN_IF(!utilsService)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsresult rv = utilsService->GetKeyForURI(aInnermostURI, data->mURISpec);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::URIData::Create new URIData created for spec "
+       "%s [this=%p]",
+       data->mURISpec.get(), data.get()));
+
+  data.forget(aData);
+  return NS_OK;
+}
+
+URIData::URIData() { MOZ_ASSERT(NS_IsMainThread()); }
+
+bool URIData::IsEqual(nsIURI* aURI) const {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aURI);
+
+  bool isEqual = false;
+  nsresult rv = mURI->Equals(aURI, &isEqual);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return false;
+  }
+
+  return isEqual;
+}
+
+const nsTArray<nsCString>& URIData::Fragments() {
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  if (mFragments.IsEmpty()) {
+    nsresult rv;
+
+    if (mURIType == nsIUrlClassifierFeature::pairwiseEntitylistURI) {
+      rv = LookupCache::GetLookupEntitylistFragments(mURISpec, &mFragments);
+    } else {
+      rv = LookupCache::GetLookupFragments(mURISpec, &mFragments);
+    }
+
+    Unused << NS_WARN_IF(NS_FAILED(rv));
+  }
+
+  return mFragments;
+}
+
+nsIURI* URIData::URI() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mURI;
+}
+
+// TableData
+// ----------------------------------------------------------------------------
+
+// In order to avoid multiple lookups on the same table + URI, we have this
+// class.
+class TableData {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TableData);
+
+  enum State {
+    eUnclassified,
+    eNoMatch,
+    eMatch,
+  };
+
+  TableData(URIData* aURIData, const nsACString& aTable);
+
+  nsIURI* URI() const;
+
+  const nsACString& Table() const;
+
+  const LookupResultArray& Result() const;
+
+  State MatchState() const;
+
+  bool IsEqual(URIData* aURIData, const nsACString& aTable) const;
+
+  // Returns true if the table classifies the URI. This method must be called
+  // on hte classifier worker thread.
+  bool DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier);
+
+ private:
+  ~TableData();
+
+  RefPtr<URIData> mURIData;
+  State mState;
+
+  nsCString mTable;
+  LookupResultArray mResults;
+};
+
+TableData::TableData(URIData* aURIData, const nsACString& aTable)
+    : mURIData(aURIData), mState(eUnclassified), mTable(aTable) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aURIData);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::TableData CTOR - new TableData created %s "
+       "[this=%p]",
+       aTable.BeginReading(), this));
+}
+
+TableData::~TableData() = default;
+
+nsIURI* TableData::URI() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mURIData->URI();
+}
+
+const nsACString& TableData::Table() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mTable;
+}
+
+const LookupResultArray& TableData::Result() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mResults;
+}
+
+TableData::State TableData::MatchState() const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mState;
+}
+
+bool TableData::IsEqual(URIData* aURIData, const nsACString& aTable) const {
+  MOZ_ASSERT(NS_IsMainThread());
+  return mURIData == aURIData && mTable == aTable;
+}
+
+bool TableData::DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(aWorkerClassifier);
+
+  if (mState == TableData::eUnclassified) {
+    UC_LOG_LEAK(
+        ("AsyncChannelClassifier::TableData::DoLookup - starting lookup "
+         "[this=%p]",
+         this));
+
+    const nsTArray<nsCString>& fragments = mURIData->Fragments();
+    nsresult rv = aWorkerClassifier->DoSingleLocalLookupWithURIFragments(
+        fragments, mTable, mResults);
+    Unused << NS_WARN_IF(NS_FAILED(rv));
+
+    mState = mResults.IsEmpty() ? TableData::eNoMatch : TableData::eMatch;
+
+    UC_LOG_LEAK(
+        ("AsyncChannelClassifier::TableData::DoLookup - lookup completed. "
+         "Matches: %d [this=%p]",
+         (int)mResults.Length(), this));
+  }
+
+  return !mResults.IsEmpty();
+}
+
+// FeatureData
+// ----------------------------------------------------------------------------
+
+class FeatureTask;
+
+// This is class contains all the Feature data.
+class FeatureData {
+  enum State {
+    eUnclassified,
+    eNoMatch,
+    eMatchBlocklist,
+    eMatchEntitylist,
+  };
+
+ public:
+  FeatureData() = default;
+  ~FeatureData();
+
+  nsresult Initialize(FeatureTask* aTask, nsIChannel* aChannel,
+                      nsIUrlClassifierFeature* aFeature);
+
+  void DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier);
+
+  // Returns true if the next feature should be processed.
+  bool MaybeCompleteClassification(nsIChannel* aChannel);
+
+ private:
+  nsresult InitializeList(FeatureTask* aTask, nsIChannel* aChannel,
+                          nsIUrlClassifierFeature::listType aListType,
+                          nsTArray<RefPtr<TableData>>& aList);
+
+  State mState{eUnclassified};
+  nsCOMPtr<nsIUrlClassifierFeature> mFeature;
+  nsCOMPtr<nsIChannel> mChannel;
+
+  nsTArray<RefPtr<TableData>> mBlocklistTables;
+  nsTArray<RefPtr<TableData>> mEntitylistTables;
+
+  // blocklist + entitylist.
+  nsCString mHostInPrefTables[2];
+};
+
+FeatureData::~FeatureData() {
+  NS_ReleaseOnMainThread("FeatureData:mFeature", mFeature.forget());
+}
+
+nsresult FeatureData::Initialize(FeatureTask* aTask, nsIChannel* aChannel,
+                                 nsIUrlClassifierFeature* aFeature) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aTask);
+  MOZ_ASSERT(aChannel);
+  MOZ_ASSERT(aFeature);
+
+  if (UC_LOG_ENABLED()) {
+    nsAutoCString name;
+    aFeature->GetName(name);
+    UC_LOG_LEAK(
+        ("AsyncChannelClassifier::FeatureData::Initialize - Feature %s "
+         "[this=%p, channel=%p]",
+         name.get(), this, aChannel));
+  }
+
+  mFeature = aFeature;
+  mChannel = aChannel;
+
+  nsresult rv = InitializeList(
+      aTask, aChannel, nsIUrlClassifierFeature::blocklist, mBlocklistTables);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  rv = InitializeList(aTask, aChannel, nsIUrlClassifierFeature::entitylist,
+                      mEntitylistTables);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+void FeatureData::DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(aWorkerClassifier);
+  MOZ_ASSERT(mState == eUnclassified);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::DoLookup - lookup starting "
+       "[this=%p]",
+       this));
+
+  // This is wrong, but it's fast: we don't want to check if the host is in the
+  // blocklist table if we know that it's going to be entitylisted by pref.
+  // So, also if maybe it's not blocklisted, let's consider it 'entitylisted'.
+  if (!mHostInPrefTables[nsIUrlClassifierFeature::entitylist].IsEmpty()) {
+    UC_LOG_LEAK(
+        ("AsyncChannelClassifier::FeatureData::DoLookup - entitylisted by pref "
+         "[this=%p]",
+         this));
+    mState = eMatchEntitylist;
+    return;
+  }
+
+  // Let's check if this feature blocklists the URI.
+
+  bool isBlocklisted =
+      !mHostInPrefTables[nsIUrlClassifierFeature::blocklist].IsEmpty();
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::DoLookup - blocklisted by pref: "
+       "%d [this=%p]",
+       isBlocklisted, this));
+
+  if (!isBlocklisted) {
+    // If one of the blocklist table matches the URI, we don't need to continue
+    // with the others: the feature is blocklisted (but maybe also
+    // entitylisted).
+    for (TableData* tableData : mBlocklistTables) {
+      if (tableData->DoLookup(aWorkerClassifier)) {
+        isBlocklisted = true;
+        break;
+      }
+    }
+  }
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::DoLookup - blocklisted before "
+       "entitylisting: %d [this=%p]",
+       isBlocklisted, this));
+
+  if (!isBlocklisted) {
+    mState = eNoMatch;
+    return;
+  }
+
+  // Now, let's check if we need to entitylist the same URI.
+
+  for (TableData* tableData : mEntitylistTables) {
+    // If one of the entitylist table matches the URI, we don't need to continue
+    // with the others: the feature is entitylisted.
+    if (tableData->DoLookup(aWorkerClassifier)) {
+      UC_LOG_LEAK(
+          ("AsyncChannelClassifier::FeatureData::DoLookup - entitylisted by "
+           "table [this=%p]",
+           this));
+      mState = eMatchEntitylist;
+      return;
+    }
+  }
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::DoLookup - blocklisted [this=%p]",
+       this));
+  mState = eMatchBlocklist;
+}
+
+bool FeatureData::MaybeCompleteClassification(nsIChannel* aChannel) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsAutoCString name;
+  mFeature->GetName(name);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::MaybeCompleteClassification - "
+       "completing "
+       "classification [this=%p channel=%p]",
+       this, aChannel));
+
+  switch (mState) {
+    case eNoMatch:
+      UC_LOG(
+          ("AsyncChannelClassifier::FeatureData::MaybeCompleteClassification - "
+           "no match for feature %s. Let's "
+           "move on [this=%p channel=%p]",
+           name.get(), this, aChannel));
+      return true;
+
+    case eMatchEntitylist:
+      UC_LOG(
+          ("AsyncChannelClassifier::FeatureData::MayebeCompleteClassification "
+           "- entitylisted by feature %s. Let's "
+           "move on [this=%p channel=%p]",
+           name.get(), this, aChannel));
+      return true;
+
+    case eMatchBlocklist:
+      UC_LOG(
+          ("AsyncChannelClassifier::FeatureData::MaybeCompleteClassification - "
+           "blocklisted by feature %s [this=%p channel=%p]",
+           name.get(), this, aChannel));
+      break;
+
+    case eUnclassified:
+      MOZ_CRASH("We should not be here!");
+      break;
+  }
+
+  MOZ_ASSERT(mState == eMatchBlocklist);
+
+  // Maybe we have to ignore this host
+  nsAutoCString exceptionList;
+  nsresult rv = mFeature->GetExceptionHostList(exceptionList);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    UC_LOG_WARN(
+        ("AsyncChannelClassifier::FeatureData::MayebeCompleteClassification - "
+         "error. Let's move on [this=%p channel=%p]",
+         this, aChannel));
+    return true;
+  }
+
+  if (!mBlocklistTables.IsEmpty() &&
+      nsContentUtils::IsURIInList(mBlocklistTables[0]->URI(), exceptionList)) {
+    nsCString spec = mBlocklistTables[0]->URI()->GetSpecOrDefault();
+    spec.Truncate(std::min(spec.Length(), UrlClassifierCommon::sMaxSpecLength));
+    UC_LOG(
+        ("AsyncChannelClassifier::FeatureData::MaybeCompleteClassification - "
+         "uri %s found in "
+         "exceptionlist of feature %s [this=%p channel=%p]",
+         spec.get(), name.get(), this, aChannel));
+    return true;
+  }
+
+  nsTArray<nsCString> list;
+  nsTArray<nsCString> hashes;
+  if (!mHostInPrefTables[nsIUrlClassifierFeature::blocklist].IsEmpty()) {
+    list.AppendElement(mHostInPrefTables[nsIUrlClassifierFeature::blocklist]);
+
+    // Telemetry expects every tracking channel has hash, create it for test
+    // entry
+    Completion complete;
+    complete.FromPlaintext(
+        mHostInPrefTables[nsIUrlClassifierFeature::blocklist]);
+    hashes.AppendElement(complete.ToString());
+  }
+
+  for (TableData* tableData : mBlocklistTables) {
+    if (tableData->MatchState() == TableData::eMatch) {
+      list.AppendElement(tableData->Table());
+
+      for (const auto& r : tableData->Result()) {
+        hashes.AppendElement(r->hash.complete.ToString());
+      }
+    }
+  }
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::MaybeCompleteClassification - "
+       "process channel [this=%p channel=%p]",
+       this, aChannel));
+
+  bool shouldContinue = false;
+  rv = mFeature->ProcessChannel(aChannel, list, hashes, &shouldContinue);
+  Unused << NS_WARN_IF(NS_FAILED(rv));
+
+  return shouldContinue;
+}
+
+// CallbackHolder
+// ----------------------------------------------------------------------------
+
+// This class keeps the callback alive and makes sure that we release it on the
+// correct thread.
+class CallbackHolder final {
+ public:
+  NS_INLINE_DECL_REFCOUNTING(CallbackHolder);
+
+  explicit CallbackHolder(std::function<void()>&& aCallback)
+      : mCallback(std::move(aCallback)) {}
+
+  void Exec() const { mCallback(); }
+
+ private:
+  ~CallbackHolder() = default;
+
+  std::function<void()> mCallback;
+};
+
+// FeatureTask
+// ----------------------------------------------------------------------------
+
+// A FeatureTask is a class that is able to classify a channel using a set of
+// features. The features are grouped by:
+// - URIs - to avoid extra URI parsing.
+// - Tables - to avoid multiple lookup on the same table.
+class FeatureTask {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FeatureTask);
+
+  static nsresult Create(nsIChannel* aChannel,
+                         std::function<void()>&& aCallback,
+                         FeatureTask** aTask);
+
+  // Called on the classifier thread.
+  void DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier);
+
+  // Called on the main-thread to process the channel.
+  void CompleteClassification();
+
+  nsresult GetOrCreateURIData(nsIURI* aURI, nsIURI* aInnermostURI,
+                              nsIUrlClassifierFeature::URIType aURIType,
+                              URIData** aData);
+
+  nsresult GetOrCreateTableData(URIData* aURIData, const nsACString& aTable,
+                                TableData** aData);
+
+ private:
+  FeatureTask(nsIChannel* aChannel, std::function<void()>&& aCallback);
+  ~FeatureTask();
+
+  nsCOMPtr<nsIChannel> mChannel;
+  RefPtr<CallbackHolder> mCallbackHolder;
+
+  nsTArray<FeatureData> mFeatures;
+  nsTArray<RefPtr<URIData>> mURIs;
+  nsTArray<RefPtr<TableData>> mTables;
+};
+
+// Features are able to classify particular URIs from a channel. For instance,
+// tracking-annotation feature uses the top-level URI to entitylist the current
+// channel's URI.  Because of
+// this, this function aggregates feature per URI and tables.
+/* static */
+nsresult FeatureTask::Create(nsIChannel* aChannel,
+                             std::function<void()>&& aCallback,
+                             FeatureTask** aTask) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aChannel);
+  MOZ_ASSERT(aTask);
+
+  // We need to obtain the list of nsIUrlClassifierFeature objects able to
+  // classify this channel. If the list is empty, we do an early return.
+  nsTArray<nsCOMPtr<nsIUrlClassifierFeature>> features;
+  UrlClassifierFeatureFactory::GetFeaturesFromChannel(aChannel, features);
+  if (features.IsEmpty()) {
+    UC_LOG(
+        ("AsyncChannelClassifier::FeatureTask::Create - no task is needed for "
+         "channel %p",
+         aChannel));
+    return NS_OK;
+  }
+
+  RefPtr<FeatureTask> task = new FeatureTask(aChannel, std::move(aCallback));
+
+  UC_LOG(
+      ("AsyncChannelClassifier::FeatureTask::Create - FeatureTask %p created "
+       "for channel %p",
+       task.get(), aChannel));
+
+  for (nsIUrlClassifierFeature* feature : features) {
+    FeatureData* featureData = task->mFeatures.AppendElement();
+    nsresult rv = featureData->Initialize(task, aChannel, feature);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+  }
+
+  task.forget(aTask);
+  return NS_OK;
+}
+
+FeatureTask::FeatureTask(nsIChannel* aChannel,
+                         std::function<void()>&& aCallback)
+    : mChannel(aChannel) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mChannel);
+
+  std::function<void()> callback = std::move(aCallback);
+  mCallbackHolder = new CallbackHolder(std::move(callback));
+}
+
+FeatureTask::~FeatureTask() {
+  NS_ReleaseOnMainThread("FeatureTask::mChannel", mChannel.forget());
+  NS_ReleaseOnMainThread("FeatureTask::mCallbackHolder",
+                         mCallbackHolder.forget());
+}
+
+nsresult FeatureTask::GetOrCreateURIData(
+    nsIURI* aURI, nsIURI* aInnermostURI,
+    nsIUrlClassifierFeature::URIType aURIType, URIData** aData) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aURI);
+  MOZ_ASSERT(aInnermostURI);
+  MOZ_ASSERT(aData);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::GetOrCreateURIData - checking if "
+       "a URIData must be "
+       "created [this=%p]",
+       this));
+
+  for (URIData* data : mURIs) {
+    if (data->IsEqual(aURI)) {
+      UC_LOG_LEAK(
+          ("AsyncChannelClassifier::FeatureTask::GetOrCreateURIData - reuse "
+           "existing URIData %p [this=%p]",
+           data, this));
+
+      RefPtr<URIData> uriData = data;
+      uriData.forget(aData);
+      return NS_OK;
+    }
+  }
+
+  RefPtr<URIData> data;
+  nsresult rv =
+      URIData::Create(aURI, aInnermostURI, aURIType, getter_AddRefs(data));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  mURIs.AppendElement(data);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::GetOrCreateURIData - create new "
+       "URIData %p [this=%p]",
+       data.get(), this));
+
+  data.forget(aData);
+  return NS_OK;
+}
+
+nsresult FeatureTask::GetOrCreateTableData(URIData* aURIData,
+                                           const nsACString& aTable,
+                                           TableData** aData) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aURIData);
+  MOZ_ASSERT(aData);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::GetOrCreateTableData - checking "
+       "if TableData must be "
+       "created [this=%p]",
+       this));
+
+  for (TableData* data : mTables) {
+    if (data->IsEqual(aURIData, aTable)) {
+      UC_LOG_LEAK(
+          ("FeatureTask::GetOrCreateTableData - reuse existing TableData %p "
+           "[this=%p]",
+           data, this));
+
+      RefPtr<TableData> tableData = data;
+      tableData.forget(aData);
+      return NS_OK;
+    }
+  }
+
+  RefPtr<TableData> data = new TableData(aURIData, aTable);
+  mTables.AppendElement(data);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::GetOrCreateTableData - create new "
+       "TableData %p [this=%p]",
+       data.get(), this));
+
+  data.forget(aData);
+  return NS_OK;
+}
+
+void FeatureTask::DoLookup(nsUrlClassifierDBServiceWorker* aWorkerClassifier) {
+  MOZ_ASSERT(!NS_IsMainThread());
+  MOZ_ASSERT(aWorkerClassifier);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::DoLookup - starting lookup "
+       "[this=%p]",
+       this));
+
+  for (FeatureData& feature : mFeatures) {
+    feature.DoLookup(aWorkerClassifier);
+  }
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureTask::DoLookup - lookup completed "
+       "[this=%p]",
+       this));
+}
+
+void FeatureTask::CompleteClassification() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  for (FeatureData& feature : mFeatures) {
+    if (!feature.MaybeCompleteClassification(mChannel)) {
+      break;
+    }
+  }
+
+  UC_LOG(
+      ("AsyncChannelClassifier::FeatureTask::CompleteClassification - complete "
+       "classification for "
+       "channel %p [this=%p]",
+       mChannel.get(), this));
+
+  mCallbackHolder->Exec();
+}
+
+nsresult FeatureData::InitializeList(
+    FeatureTask* aTask, nsIChannel* aChannel,
+    nsIUrlClassifierFeature::listType aListType,
+    nsTArray<RefPtr<TableData>>& aList) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aTask);
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("AsyncChannelClassifier::FeatureData::InitializeList - initialize list "
+       "%d for channel %p [this=%p]",
+       aListType, aChannel, this));
+
+  nsCOMPtr<nsIURI> uri;
+  nsIUrlClassifierFeature::URIType URIType;
+  nsresult rv = mFeature->GetURIByListType(aChannel, aListType, &URIType,
+                                           getter_AddRefs(uri));
+  if (NS_FAILED(rv)) {
+    if (UC_LOG_ENABLED()) {
+      nsAutoCString errorName;
+      GetErrorName(rv, errorName);
+      UC_LOG_LEAK(
+          ("AsyncChannelClassifier::FeatureData::InitializeList - Got an "
+           "unexpected error (rv=%s) [this=%p]",
+           errorName.get(), this));
+    }
+    return rv;
+  }
+
+  if (!uri) {
+    // Return success when the URI is empty to conitnue to do the lookup.
+    UC_LOG_LEAK(
+        ("AsyncChannelClassifier::FeatureData::InitializeList - got an empty "
+         "URL [this=%p]",
+         this));
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIURI> innermostURI = NS_GetInnermostURI(uri);
+  if (NS_WARN_IF(!innermostURI)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsAutoCString host;
+  rv = innermostURI->GetHost(host);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  bool found = false;
+  nsAutoCString tableName;
+  rv = mFeature->HasHostInPreferences(host, aListType, tableName, &found);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (found) {
+    mHostInPrefTables[aListType] = tableName;
+  }
+
+  RefPtr<URIData> uriData;
+  rv = aTask->GetOrCreateURIData(uri, innermostURI, URIType,
+                                 getter_AddRefs(uriData));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  MOZ_ASSERT(uriData);
+
+  nsTArray<nsCString> tables;
+  rv = mFeature->GetTables(aListType, tables);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  for (const nsCString& table : tables) {
+    RefPtr<TableData> data;
+    rv = aTask->GetOrCreateTableData(uriData, table, getter_AddRefs(data));
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+
+    MOZ_ASSERT(data);
+    aList.AppendElement(data);
+  }
+
+  return NS_OK;
+}
+
+}  // namespace
+
+/* static */
+nsresult AsyncUrlChannelClassifier::CheckChannel(
+    nsIChannel* aChannel, std::function<void()>&& aCallback) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aChannel);
+
+  if (!aCallback) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (UC_LOG_ENABLED()) {
+    nsCOMPtr<nsIURI> chanURI;
+    if (NS_SUCCEEDED(aChannel->GetURI(getter_AddRefs(chanURI)))) {
+      nsCString chanSpec = chanURI->GetSpecOrDefault();
+      chanSpec.Truncate(
+          std::min(chanSpec.Length(), UrlClassifierCommon::sMaxSpecLength));
+
+      nsCOMPtr<nsIURI> topWinURI;
+      Unused << UrlClassifierCommon::GetTopWindowURI(aChannel,
+                                                     getter_AddRefs(topWinURI));
+      nsCString topWinSpec =
+          topWinURI ? topWinURI->GetSpecOrDefault() : "(null)"_ns;
+
+      topWinSpec.Truncate(
+          std::min(topWinSpec.Length(), UrlClassifierCommon::sMaxSpecLength));
+
+      UC_LOG(
+          ("AsyncUrlChannelClassifier::CheckChannel - starting the "
+           "classification on channel %p",
+           aChannel));
+      UC_LOG(("    uri is %s [channel=%p]", chanSpec.get(), aChannel));
+      UC_LOG(
+          ("    top-level uri is %s [channel=%p]", topWinSpec.get(), aChannel));
+    }
+  }
+
+  RefPtr<FeatureTask> task;
+  nsresult rv =
+      FeatureTask::Create(aChannel, std::move(aCallback), getter_AddRefs(task));
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  if (!task) {
+    // No task is needed for this channel, return an error so the caller won't
+    // wait for a callback.
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<nsUrlClassifierDBServiceWorker> workerClassifier =
+      nsUrlClassifierDBService::GetWorker();
+  if (NS_WARN_IF(!workerClassifier)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
+      "AsyncUrlChannelClassifier::CheckChannel",
+      [task, workerClassifier]() -> void {
+        MOZ_ASSERT(!NS_IsMainThread());
+        task->DoLookup(workerClassifier);
+
+        nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
+            "AsyncUrlChannelClassifier::CheckChannel - return",
+            [task]() -> void { task->CompleteClassification(); });
+
+        NS_DispatchToMainThread(r);
+      });
+
+  return nsUrlClassifierDBService::BackgroundThread()->Dispatch(
+      r, NS_DISPATCH_NORMAL);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/AsyncUrlChannelClassifier.h b/netwerk/url-classifier/AsyncUrlChannelClassifier.h
new file mode 100644
index 0000000000..52eae5a974
--- /dev/null
+++ b/netwerk/url-classifier/AsyncUrlChannelClassifier.h
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set expandtab ts=4 sw=2 sts=2 cin: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_AsyncUrlChannelClassifier_h
+#define mozilla_net_AsyncUrlChannelClassifier_h
+
+#include "nsISupports.h"
+#include <functional>
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class AsyncUrlChannelClassifier final {
+ public:
+  static nsresult CheckChannel(nsIChannel* aChannel,
+                               std::function<void()>&& aCallback);
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_AsyncUrlChannelClassifier_h
diff --git a/netwerk/url-classifier/ChannelClassifierService.cpp b/netwerk/url-classifier/ChannelClassifierService.cpp
new file mode 100644
index 0000000000..4b1145ba00
--- /dev/null
+++ b/netwerk/url-classifier/ChannelClassifierService.cpp
@@ -0,0 +1,271 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "ChannelClassifierService.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+
+#include "UrlClassifierFeatureCryptominingProtection.h"
+#include "UrlClassifierFeatureFingerprintingProtection.h"
+#include "UrlClassifierFeatureSocialTrackingProtection.h"
+#include "UrlClassifierFeatureTrackingProtection.h"
+
+#include "mozilla/StaticPtr.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+static StaticRefPtr<ChannelClassifierService> gChannelClassifierService;
+
+NS_IMPL_ISUPPORTS(UrlClassifierBlockedChannel, nsIUrlClassifierBlockedChannel)
+
+UrlClassifierBlockedChannel::UrlClassifierBlockedChannel(nsIChannel* aChannel)
+    : mChannel(aChannel),
+      mDecision(ChannelBlockDecision::Blocked),
+      mReason(TRACKING_PROTECTION) {
+  MOZ_ASSERT(aChannel);
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetReason(uint8_t* aReason) {
+  NS_ENSURE_ARG_POINTER(aReason);
+
+  *aReason = mReason;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetUrl(nsAString& aUrl) {
+  nsCOMPtr<nsIURI> uri;
+  mChannel->GetURI(getter_AddRefs(uri));
+  if (uri) {
+    CopyUTF8toUTF16(uri->GetSpecOrDefault(), aUrl);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetTabId(uint64_t* aTabId) {
+  NS_ENSURE_ARG_POINTER(aTabId);
+
+  *aTabId = 0;
+
+  nsCOMPtr<nsILoadInfo> loadInfo = mChannel->LoadInfo();
+  MOZ_ASSERT(loadInfo);
+
+  RefPtr<dom::BrowsingContext> browsingContext;
+  nsresult rv =
+      loadInfo->GetTargetBrowsingContext(getter_AddRefs(browsingContext));
+  if (NS_WARN_IF(NS_FAILED(rv)) || !browsingContext) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Get top-level browsing context to ensure window global parent is ready
+  // to use, tabId is the same anyway.
+  dom::CanonicalBrowsingContext* top = browsingContext->Canonical()->Top();
+  dom::WindowGlobalParent* wgp = top->GetCurrentWindowGlobal();
+  if (!wgp) {
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<dom::BrowserParent> browserParent = wgp->GetBrowserParent();
+  if (!browserParent) {
+    return NS_ERROR_FAILURE;
+  }
+
+  *aTabId = browserParent->GetTabId();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetChannelId(uint64_t* aChannelId) {
+  NS_ENSURE_ARG_POINTER(aChannelId);
+
+  nsCOMPtr<nsIIdentChannel> channel(do_QueryInterface(mChannel));
+  *aChannelId = channel ? channel->ChannelId() : 0;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetTopLevelUrl(nsAString& aTopLevelUrl) {
+  nsCOMPtr<nsILoadInfo> loadInfo = mChannel->LoadInfo();
+  MOZ_ASSERT(loadInfo);
+
+  RefPtr<dom::BrowsingContext> browsingContext;
+  nsresult rv =
+      loadInfo->GetTargetBrowsingContext(getter_AddRefs(browsingContext));
+  if (NS_WARN_IF(NS_FAILED(rv)) || !browsingContext) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Get top-level browsing context to ensure window global parent is ready
+  // to use, tabId is the same anyway.
+  dom::CanonicalBrowsingContext* top = browsingContext->Canonical()->Top();
+  dom::WindowGlobalParent* wgp = top->GetCurrentWindowGlobal();
+  if (!wgp) {
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<nsIURI> uri = wgp->GetDocumentURI();
+  if (!uri) {
+    return NS_ERROR_FAILURE;
+  }
+
+  CopyUTF8toUTF16(uri->GetSpecOrDefault(), aTopLevelUrl);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetTables(nsACString& aTables) {
+  aTables.Assign(mTables);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::GetIsPrivateBrowsing(bool* aIsPrivateBrowsing) {
+  NS_ENSURE_ARG_POINTER(aIsPrivateBrowsing);
+
+  *aIsPrivateBrowsing = NS_UsePrivateBrowsing(mChannel);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::Allow() {
+  UC_LOG(("ChannelClassifierService: allow loading the channel %p",
+          mChannel.get()));
+
+  mDecision = ChannelBlockDecision::Allowed;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierBlockedChannel::Replace() {
+  UC_LOG(("ChannelClassifierService: replace channel %p", mChannel.get()));
+
+  mDecision = ChannelBlockDecision::Replaced;
+  return NS_OK;
+}
+
+void UrlClassifierBlockedChannel::SetReason(const nsACString& aFeatureName,
+                                            const nsACString& aTableName) {
+  mTables = aTableName;
+
+  nsCOMPtr<nsIUrlClassifierFeature> feature;
+  feature =
+      UrlClassifierFeatureTrackingProtection::GetIfNameMatches(aFeatureName);
+  if (feature) {
+    mReason = TRACKING_PROTECTION;
+    return;
+  }
+
+  feature = UrlClassifierFeatureSocialTrackingProtection::GetIfNameMatches(
+      aFeatureName);
+  if (feature) {
+    mReason = SOCIAL_TRACKING_PROTECTION;
+    return;
+  }
+
+  feature = UrlClassifierFeatureFingerprintingProtection::GetIfNameMatches(
+      aFeatureName);
+  if (feature) {
+    mReason = FINGERPRINTING_PROTECTION;
+    return;
+  }
+
+  feature = UrlClassifierFeatureCryptominingProtection::GetIfNameMatches(
+      aFeatureName);
+  if (feature) {
+    mReason = CRYPTOMINING_PROTECTION;
+    return;
+  }
+}
+
+NS_IMPL_ISUPPORTS(ChannelClassifierService, nsIChannelClassifierService)
+
+// static
+already_AddRefed<nsIChannelClassifierService>
+ChannelClassifierService::GetSingleton() {
+  if (gChannelClassifierService) {
+    return do_AddRef(gChannelClassifierService);
+  }
+
+  gChannelClassifierService = new ChannelClassifierService();
+  ClearOnShutdown(&gChannelClassifierService);
+  return do_AddRef(gChannelClassifierService);
+}
+
+ChannelClassifierService::ChannelClassifierService() { mListeners.Clear(); }
+
+NS_IMETHODIMP
+ChannelClassifierService::AddListener(nsIObserver* aObserver) {
+  MOZ_ASSERT(aObserver);
+  MOZ_ASSERT(!mListeners.Contains(aObserver));
+
+  mListeners.AppendElement(aObserver);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+ChannelClassifierService::RemoveListener(nsIObserver* aObserver) {
+  MOZ_ASSERT(aObserver);
+  MOZ_ASSERT(mListeners.Contains(aObserver));
+
+  mListeners.RemoveElement(aObserver);
+  return NS_OK;
+}
+
+/* static */
+ChannelBlockDecision ChannelClassifierService::OnBeforeBlockChannel(
+    nsIChannel* aChannel, const nsACString& aFeatureName,
+    const nsACString& aTableName) {
+  MOZ_ASSERT(aChannel);
+
+  // Don't bother continuing if no one has ever registered listener
+  if (!gChannelClassifierService || !gChannelClassifierService->HasListener()) {
+    return ChannelBlockDecision::Blocked;
+  }
+
+  ChannelBlockDecision decision;
+  nsresult rv = gChannelClassifierService->OnBeforeBlockChannel(
+      aChannel, aFeatureName, aTableName, decision);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return ChannelBlockDecision::Blocked;
+  }
+
+  return decision;
+}
+
+nsresult ChannelClassifierService::OnBeforeBlockChannel(
+    nsIChannel* aChannel, const nsACString& aFeatureName,
+    const nsACString& aTableName, ChannelBlockDecision& aDecision) {
+  MOZ_ASSERT(aChannel);
+
+  aDecision = ChannelBlockDecision::Blocked;
+
+  RefPtr<UrlClassifierBlockedChannel> channel =
+      new UrlClassifierBlockedChannel(aChannel);
+  channel->SetReason(aFeatureName, aTableName);
+
+  for (const auto& listener : mListeners) {
+    listener->Observe(
+        NS_ISUPPORTS_CAST(nsIUrlClassifierBlockedChannel*, channel),
+        "urlclassifier-before-block-channel", nullptr);
+
+    aDecision = channel->GetDecision();
+  }
+
+  return NS_OK;
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/ChannelClassifierService.h b/netwerk/url-classifier/ChannelClassifierService.h
new file mode 100644
index 0000000000..2c6c13b10d
--- /dev/null
+++ b/netwerk/url-classifier/ChannelClassifierService.h
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set expandtab ts=2 sw=2 sts=2 cin: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_ChannelClassifierService_h
+#define mozilla_net_ChannelClassifierService_h
+
+#include "nsIChannelClassifierService.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "nsCOMPtr.h"
+#include "nsTArray.h"
+
+namespace mozilla {
+namespace net {
+
+enum class ChannelBlockDecision {
+  Blocked,
+  Replaced,
+  Allowed,
+};
+
+class UrlClassifierBlockedChannel final
+    : public nsIUrlClassifierBlockedChannel {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURLCLASSIFIERBLOCKEDCHANNEL
+
+  explicit UrlClassifierBlockedChannel(nsIChannel* aChannel);
+
+  bool IsUnblocked() const {
+    return mDecision != ChannelBlockDecision::Blocked;
+  }
+
+  ChannelBlockDecision GetDecision() { return mDecision; };
+
+  void SetReason(const nsACString& aFeatureName, const nsACString& aTableName);
+
+ protected:
+  ~UrlClassifierBlockedChannel() = default;
+
+ private:
+  nsCOMPtr<nsIChannel> mChannel;
+  ChannelBlockDecision mDecision;
+  uint8_t mReason;
+  nsCString mTables;
+};
+
+class ChannelClassifierService final : public nsIChannelClassifierService {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSICHANNELCLASSIFIERSERVICE
+
+  friend class UrlClassifierBlockedChannel;
+
+  static already_AddRefed<nsIChannelClassifierService> GetSingleton();
+
+  static ChannelBlockDecision OnBeforeBlockChannel(
+      nsIChannel* aChannel, const nsACString& aFeatureName,
+      const nsACString& aTableName);
+
+  nsresult OnBeforeBlockChannel(nsIChannel* aChannel,
+                                const nsACString& aFeatureName,
+                                const nsACString& aTableName,
+                                ChannelBlockDecision& aDecision);
+
+  bool HasListener() const { return !mListeners.IsEmpty(); }
+
+ private:
+  ChannelClassifierService();
+  ~ChannelClassifierService() = default;
+
+  nsTArray<nsCOMPtr<nsIObserver>> mListeners;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_ChannelClassifierService_h
diff --git a/netwerk/url-classifier/UrlClassifierCommon.cpp b/netwerk/url-classifier/UrlClassifierCommon.cpp
new file mode 100644
index 0000000000..21589cef94
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierCommon.cpp
@@ -0,0 +1,671 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/net/UrlClassifierCommon.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/Components.h"
+#include "mozilla/ContentBlockingAllowList.h"
+#include "mozilla/ContentBlockingNotifier.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/net/HttpBaseChannel.h"
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPrefs_channelclassifier.h"
+#include "mozilla/StaticPrefs_security.h"
+#include "mozIThirdPartyUtil.h"
+#include "nsContentUtils.h"
+#include "nsIChannel.h"
+#include "nsIClassifiedChannel.h"
+#include "mozilla/dom/Document.h"
+#include "nsIDocShell.h"
+#include "nsIHttpChannel.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIParentChannel.h"
+#include "nsIScriptError.h"
+#include "nsIWebProgressListener.h"
+#include "nsNetUtil.h"
+#include "nsQueryObject.h"
+#include "nsReadableUtils.h"
+
+namespace mozilla {
+namespace net {
+
+const nsCString::size_type UrlClassifierCommon::sMaxSpecLength = 128;
+
+// MOZ_LOG=nsChannelClassifier:5
+LazyLogModule UrlClassifierCommon::sLog("nsChannelClassifier");
+LazyLogModule UrlClassifierCommon::sLogLeak("nsChannelClassifierLeak");
+
+/* static */
+bool UrlClassifierCommon::AddonMayLoad(nsIChannel* aChannel, nsIURI* aURI) {
+  nsCOMPtr<nsILoadInfo> channelLoadInfo = aChannel->LoadInfo();
+  // loadingPrincipal is used here to ensure we are loading into an
+  // addon principal.  This allows an addon, with explicit permission, to
+  // call out to API endpoints that may otherwise get blocked.
+  nsIPrincipal* loadingPrincipal = channelLoadInfo->GetLoadingPrincipal();
+  if (!loadingPrincipal) {
+    return false;
+  }
+
+  return BasePrincipal::Cast(loadingPrincipal)->AddonAllowsLoad(aURI, true);
+}
+
+/* static */
+bool UrlClassifierCommon::ShouldEnableProtectionForChannel(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsIURI> chanURI;
+  nsresult rv = aChannel->GetURI(getter_AddRefs(chanURI));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return false;
+  }
+
+  if (UrlClassifierCommon::AddonMayLoad(aChannel, chanURI)) {
+    return false;
+  }
+
+  nsCOMPtr<nsIURI> topWinURI;
+  nsCOMPtr<nsIHttpChannelInternal> channel = do_QueryInterface(aChannel);
+  if (NS_WARN_IF(!channel)) {
+    return false;
+  }
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+  MOZ_ASSERT(loadInfo);
+
+  auto policyType = loadInfo->GetExternalContentPolicyType();
+  if (policyType == ExtContentPolicy::TYPE_DOCUMENT) {
+    UC_LOG(
+        ("UrlClassifierCommon::ShouldEnableProtectionForChannel - "
+         "skipping top-level load for channel %p",
+         aChannel));
+    return false;
+  }
+
+  // Tracking protection will be enabled so return without updating
+  // the security state. If any channels are subsequently cancelled
+  // (page elements blocked) the state will be then updated.
+
+  return true;
+}
+
+/* static */
+nsresult UrlClassifierCommon::SetTrackingInfo(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aLists,
+    const nsTArray<nsCString>& aFullHashes) {
+  NS_ENSURE_ARG(!aLists.IsEmpty());
+
+  // Can be called in EITHER the parent or child process.
+  nsresult rv;
+  nsCOMPtr<nsIClassifiedChannel> classifiedChannel =
+      do_QueryInterface(aChannel, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (classifiedChannel) {
+    classifiedChannel->SetMatchedTrackingInfo(aLists, aFullHashes);
+  }
+
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(aChannel, parentChannel);
+  if (parentChannel) {
+    // This channel is a parent-process proxy for a child process request.
+    // Tell the child process channel to do this as well.
+    // TODO: We can remove the code sending the IPC to content to update
+    //       tracking info once we move the ContentBlockingLog into the parent.
+    //       This would be done in Bug 1599046.
+    nsAutoCString strLists, strHashes;
+    TablesToString(aLists, strLists);
+    TablesToString(aFullHashes, strHashes);
+
+    parentChannel->SetClassifierMatchedTrackingInfo(strLists, strHashes);
+  }
+
+  return NS_OK;
+}
+
+/* static */
+nsresult UrlClassifierCommon::SetBlockedContent(nsIChannel* channel,
+                                                nsresult aErrorCode,
+                                                const nsACString& aList,
+                                                const nsACString& aProvider,
+                                                const nsACString& aFullHash) {
+  NS_ENSURE_ARG(!aList.IsEmpty());
+
+  switch (aErrorCode) {
+    case NS_ERROR_MALWARE_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_MALWARE_URI);
+      break;
+    case NS_ERROR_PHISHING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_PHISHING_URI);
+      break;
+    case NS_ERROR_UNWANTED_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_UNWANTED_URI);
+      break;
+    case NS_ERROR_TRACKING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_TRACKING_URI);
+      break;
+    case NS_ERROR_BLOCKED_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_BLOCKED_URI);
+      break;
+    case NS_ERROR_HARMFUL_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_HARMFUL_URI);
+      break;
+    case NS_ERROR_CRYPTOMINING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_CRYPTOMINING_URI);
+      break;
+    case NS_ERROR_FINGERPRINTING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_FINGERPRINTING_URI);
+      break;
+    case NS_ERROR_SOCIALTRACKING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_SOCIALTRACKING_URI);
+      break;
+    case NS_ERROR_EMAILTRACKING_URI:
+      NS_SetRequestBlockingReason(
+          channel, nsILoadInfo::BLOCKING_REASON_CLASSIFY_EMAILTRACKING_URI);
+      break;
+    default:
+      MOZ_CRASH(
+          "Missing nsILoadInfo::BLOCKING_REASON* for the classification error");
+      break;
+  }
+
+  // Can be called in EITHER the parent or child process.
+  nsresult rv;
+  nsCOMPtr<nsIClassifiedChannel> classifiedChannel =
+      do_QueryInterface(channel, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (classifiedChannel) {
+    classifiedChannel->SetMatchedInfo(aList, aProvider, aFullHash);
+  }
+
+  if (XRE_IsParentProcess()) {
+    nsCOMPtr<nsIParentChannel> parentChannel;
+    NS_QueryNotificationCallbacks(channel, parentChannel);
+    if (parentChannel) {
+      // This channel is a parent-process proxy for a child process request.
+      // Tell the child process channel to do this as well.
+      // TODO: We can remove the code sending the IPC to content to update
+      //       matched info once we move the ContentBlockingLog into the parent.
+      //       This would be done in Bug 1601063.
+      parentChannel->SetClassifierMatchedInfo(aList, aProvider, aFullHash);
+    }
+
+    unsigned state =
+        UrlClassifierFeatureFactory::GetClassifierBlockingEventCode(aErrorCode);
+    if (!state) {
+      state = nsIWebProgressListener::STATE_BLOCKED_UNSAFE_CONTENT;
+    }
+    ContentBlockingNotifier::OnEvent(channel, state);
+
+    return NS_OK;
+  }
+
+  // TODO: ReportToConsole is called in the child process,
+  // If nsContentUtils::ReportToConsole is not fission compatiable(cannot report
+  // to correct top-level window), we need to do this in the parent process
+  // instead (find the top-level window in the parent and send an IPC to child
+  // processes to report console).
+  nsCOMPtr<mozIThirdPartyUtil> thirdPartyUtil =
+      components::ThirdPartyUtil::Service();
+  if (NS_WARN_IF(!thirdPartyUtil)) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIURI> uriBeingLoaded =
+      AntiTrackingUtils::MaybeGetDocumentURIBeingLoaded(channel);
+  nsCOMPtr<mozIDOMWindowProxy> win;
+  rv = thirdPartyUtil->GetTopWindowForChannel(channel, uriBeingLoaded,
+                                              getter_AddRefs(win));
+  NS_ENSURE_SUCCESS(rv, NS_OK);
+  auto* pwin = nsPIDOMWindowOuter::From(win);
+  nsCOMPtr<nsIDocShell> docShell = pwin->GetDocShell();
+  if (!docShell) {
+    return NS_OK;
+  }
+  RefPtr<dom::Document> doc = docShell->GetDocument();
+  NS_ENSURE_TRUE(doc, NS_OK);
+
+  // Log a warning to the web console.
+  nsCOMPtr<nsIURI> uri;
+  channel->GetURI(getter_AddRefs(uri));
+  AutoTArray<nsString, 1> params;
+  CopyUTF8toUTF16(uri->GetSpecOrDefault(), *params.AppendElement());
+  const char* message;
+  nsCString category;
+
+  if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode)) {
+    message = UrlClassifierFeatureFactory::
+        ClassifierBlockingErrorCodeToConsoleMessage(aErrorCode, category);
+  } else {
+    message = "UnsafeUriBlocked";
+    category = "Safe Browsing"_ns;
+  }
+
+  nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, category, doc,
+                                  nsContentUtils::eNECKO_PROPERTIES, message,
+                                  params);
+
+  return NS_OK;
+}
+
+/* static */
+nsresult UrlClassifierCommon::GetTopWindowURI(nsIChannel* aChannel,
+                                              nsIURI** aURI) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+  MOZ_ASSERT(loadInfo);
+
+  RefPtr<dom::BrowsingContext> browsingContext;
+  nsresult rv =
+      loadInfo->GetTargetBrowsingContext(getter_AddRefs(browsingContext));
+  if (NS_WARN_IF(NS_FAILED(rv)) || !browsingContext) {
+    return NS_ERROR_FAILURE;
+  }
+
+  dom::CanonicalBrowsingContext* top = browsingContext->Canonical()->Top();
+  dom::WindowGlobalParent* wgp = top->GetCurrentWindowGlobal();
+  if (!wgp) {
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<nsIURI> uri = wgp->GetDocumentURI();
+  if (!uri) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uri.forget(aURI);
+  return NS_OK;
+}
+
+/* static */
+nsresult UrlClassifierCommon::CreatePairwiseEntityListURI(nsIChannel* aChannel,
+                                                          nsIURI** aURI) {
+  MOZ_ASSERT(aChannel);
+  MOZ_ASSERT(aURI);
+
+  nsresult rv;
+  nsCOMPtr<nsIHttpChannelInternal> chan = do_QueryInterface(aChannel, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!chan) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIURI> topWinURI;
+  rv =
+      UrlClassifierCommon::GetTopWindowURI(aChannel, getter_AddRefs(topWinURI));
+  if (NS_FAILED(rv) || !topWinURI) {
+    // SharedWorker and ServiceWorker don't have an associated window, use
+    // client's URI instead.
+    nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+    MOZ_ASSERT(loadInfo);
+
+    Maybe<dom::ClientInfo> clientInfo = loadInfo->GetClientInfo();
+    if (clientInfo.isSome()) {
+      if ((clientInfo->Type() == dom::ClientType::Sharedworker) ||
+          (clientInfo->Type() == dom::ClientType::Serviceworker)) {
+        UC_LOG(
+            ("UrlClassifierCommon::CreatePairwiseEntityListURI - "
+             "channel %p initiated by worker, get uri from client",
+             aChannel));
+
+        auto clientPrincipalOrErr = clientInfo->GetPrincipal();
+        if (clientPrincipalOrErr.isOk()) {
+          nsCOMPtr<nsIPrincipal> principal = clientPrincipalOrErr.unwrap();
+          if (principal) {
+            auto* basePrin = BasePrincipal::Cast(principal);
+            rv = basePrin->GetURI(getter_AddRefs(topWinURI));
+            Unused << NS_WARN_IF(NS_FAILED(rv));
+          }
+        }
+      }
+    }
+
+    if (!topWinURI) {
+      UC_LOG(
+          ("UrlClassifierCommon::CreatePairwiseEntityListURI - "
+           "no top-level window associated with channel %p, "
+           "get uri from loading principal",
+           aChannel));
+
+      nsCOMPtr<nsIPrincipal> principal = loadInfo->GetLoadingPrincipal();
+      if (principal) {
+        auto* basePrin = BasePrincipal::Cast(principal);
+        rv = basePrin->GetURI(getter_AddRefs(topWinURI));
+        Unused << NS_WARN_IF(NS_FAILED(rv));
+      }
+    }
+  }
+
+  if (!topWinURI) {
+    UC_LOG(
+        ("UrlClassifierCommon::CreatePairwiseEntityListURI - "
+         "fail to get top-level window uri for channel %p",
+         aChannel));
+
+    // Return success because we want to continue to look up even without
+    // whitelist.
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIScriptSecurityManager> securityManager =
+      do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsCOMPtr<nsIPrincipal> chanPrincipal;
+  rv = securityManager->GetChannelURIPrincipal(aChannel,
+                                               getter_AddRefs(chanPrincipal));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Craft a entitylist URL like "toplevel.page/?resource=third.party.domain"
+  nsAutoCString pageHostname, resourceDomain;
+  rv = topWinURI->GetHost(pageHostname);
+  if (NS_FAILED(rv)) {
+    // When the top-level page doesn't support GetHost, for example, about:home,
+    // we don't return an error here; instead, we return success to make sure
+    // that the lookup process calling this API continues to run.
+    if (UC_LOG_ENABLED()) {
+      nsCString topWinSpec =
+          topWinURI ? topWinURI->GetSpecOrDefault() : "(null)"_ns;
+      topWinSpec.Truncate(
+          std::min(topWinSpec.Length(), UrlClassifierCommon::sMaxSpecLength));
+      UC_LOG(
+          ("UrlClassifierCommon::CreatePairwiseEntityListURI - "
+           "cannot get host from the top-level uri %s of channel %p",
+           topWinSpec.get(), aChannel));
+    }
+    return NS_OK;
+  }
+
+  rv = chanPrincipal->GetBaseDomain(resourceDomain);
+  NS_ENSURE_SUCCESS(rv, rv);
+  nsAutoCString entitylistEntry =
+      "http://"_ns + pageHostname + "/?resource="_ns + resourceDomain;
+  UC_LOG(
+      ("UrlClassifierCommon::CreatePairwiseEntityListURI - looking for %s in "
+       "the entitylist on channel %p",
+       entitylistEntry.get(), aChannel));
+
+  nsCOMPtr<nsIURI> entitylistURI;
+  rv = NS_NewURI(getter_AddRefs(entitylistURI), entitylistEntry);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  entitylistURI.forget(aURI);
+  return NS_OK;
+}
+
+namespace {
+
+void LowerPriorityHelper(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  bool isBlockingResource = false;
+
+  nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
+  if (cos) {
+    if (StaticPrefs::network_http_tailing_enabled()) {
+      uint32_t cosFlags = 0;
+      cos->GetClassFlags(&cosFlags);
+      isBlockingResource =
+          cosFlags & (nsIClassOfService::UrgentStart |
+                      nsIClassOfService::Leader | nsIClassOfService::Unblocked);
+
+      // Requests not allowed to be tailed are usually those with higher
+      // prioritization.  That overweights being a tracker: don't throttle
+      // them when not in background.
+      if (!(cosFlags & nsIClassOfService::TailForbidden)) {
+        cos->AddClassFlags(nsIClassOfService::Throttleable);
+      }
+    } else {
+      // Yes, we even don't want to evaluate the isBlockingResource when tailing
+      // is off see bug 1395525.
+
+      cos->AddClassFlags(nsIClassOfService::Throttleable);
+    }
+  }
+
+  if (!isBlockingResource) {
+    nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(aChannel);
+    if (p) {
+      UC_LOG(
+          ("UrlClassifierCommon::LowerPriorityHelper - "
+           "setting PRIORITY_LOWEST for channel %p",
+           aChannel));
+      p->SetPriority(nsISupportsPriority::PRIORITY_LOWEST);
+    }
+  }
+}
+
+}  // namespace
+
+// static
+void UrlClassifierCommon::SetClassificationFlagsHelper(
+    nsIChannel* aChannel, uint32_t aClassificationFlags, bool aIsThirdParty) {
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(aChannel, parentChannel);
+  if (parentChannel) {
+    // This channel is a parent-process proxy for a child process
+    // request. We should notify the child process as well.
+    parentChannel->NotifyClassificationFlags(aClassificationFlags,
+                                             aIsThirdParty);
+  }
+
+  RefPtr<HttpBaseChannel> httpChannel = do_QueryObject(aChannel);
+  if (httpChannel) {
+    httpChannel->AddClassificationFlags(aClassificationFlags, aIsThirdParty);
+  }
+}
+
+// static
+void UrlClassifierCommon::AnnotateChannel(nsIChannel* aChannel,
+                                          uint32_t aClassificationFlags,
+                                          uint32_t aLoadingState) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsIURI> chanURI;
+  nsresult rv = aChannel->GetURI(getter_AddRefs(chanURI));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return;
+  }
+
+  bool isThirdPartyWithTopLevelWinURI =
+      AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+
+  SetClassificationFlagsHelper(aChannel, aClassificationFlags,
+                               isThirdPartyWithTopLevelWinURI);
+
+  // We consider valid tracking flags (based on the current strict vs basic list
+  // prefs) and cryptomining (which is not considered as tracking).
+  bool validClassificationFlags =
+      IsTrackingClassificationFlag(aClassificationFlags,
+                                   NS_UsePrivateBrowsing(aChannel)) ||
+      IsCryptominingClassificationFlag(aClassificationFlags,
+                                       NS_UsePrivateBrowsing(aChannel));
+
+  if (validClassificationFlags && isThirdPartyWithTopLevelWinURI) {
+    ContentBlockingNotifier::OnEvent(aChannel, aLoadingState);
+  }
+
+  if (isThirdPartyWithTopLevelWinURI &&
+      StaticPrefs::privacy_trackingprotection_lower_network_priority()) {
+    LowerPriorityHelper(aChannel);
+  }
+}
+
+// static
+bool UrlClassifierCommon::IsAllowListed(nsIChannel* aChannel) {
+  nsCOMPtr<nsIHttpChannelInternal> channel = do_QueryInterface(aChannel);
+  if (NS_WARN_IF(!channel)) {
+    return false;
+  }
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+
+  bool isAllowListed = false;
+  if (StaticPrefs::channelclassifier_allowlist_example()) {
+    UC_LOG(
+        ("UrlClassifierCommon::IsAllowListed - "
+         "check allowlisting test domain on channel %p",
+         aChannel));
+
+    nsCOMPtr<nsIIOService> ios = components::IO::Service();
+    if (NS_WARN_IF(!ios)) {
+      return false;
+    }
+
+    nsCOMPtr<nsIURI> uri;
+    nsresult rv = ios->NewURI("http://allowlisted.example.com"_ns, nullptr,
+                              nullptr, getter_AddRefs(uri));
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return false;
+    }
+    nsCOMPtr<nsIPrincipal> cbAllowListPrincipal =
+        BasePrincipal::CreateContentPrincipal(uri,
+                                              loadInfo->GetOriginAttributes());
+
+    rv = ContentBlockingAllowList::Check(
+        cbAllowListPrincipal, NS_UsePrivateBrowsing(aChannel), isAllowListed);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return false;
+    }
+  } else {
+    nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+    MOZ_ALWAYS_SUCCEEDS(
+        loadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings)));
+    isAllowListed = cookieJarSettings->GetIsOnContentBlockingAllowList();
+  }
+
+  if (isAllowListed) {
+    UC_LOG(("UrlClassifierCommon::IsAllowListed - user override on channel %p",
+            aChannel));
+  }
+
+  return isAllowListed;
+}
+
+// static
+bool UrlClassifierCommon::IsTrackingClassificationFlag(uint32_t aFlag,
+                                                       bool aIsPrivate) {
+  bool isLevel2ListEnabled =
+      aIsPrivate
+          ? StaticPrefs::privacy_annotate_channels_strict_list_pbmode_enabled()
+          : StaticPrefs::privacy_annotate_channels_strict_list_enabled();
+
+  if (isLevel2ListEnabled &&
+      (aFlag & nsIClassifiedChannel::ClassificationFlags::
+                   CLASSIFIED_ANY_STRICT_TRACKING)) {
+    return true;
+  }
+
+  if (StaticPrefs::privacy_socialtracking_block_cookies_enabled() &&
+      IsSocialTrackingClassificationFlag(aFlag)) {
+    return true;
+  }
+
+  return (
+      aFlag &
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_ANY_BASIC_TRACKING);
+}
+
+// static
+bool UrlClassifierCommon::IsSocialTrackingClassificationFlag(uint32_t aFlag) {
+  return (aFlag & nsIClassifiedChannel::ClassificationFlags::
+                      CLASSIFIED_ANY_SOCIAL_TRACKING) != 0;
+}
+
+// static
+bool UrlClassifierCommon::IsCryptominingClassificationFlag(uint32_t aFlag,
+                                                           bool aIsPrivate) {
+  if (aFlag &
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_CRYPTOMINING) {
+    return true;
+  }
+
+  bool isLevel2ListEnabled =
+      aIsPrivate
+          ? StaticPrefs::privacy_annotate_channels_strict_list_pbmode_enabled()
+          : StaticPrefs::privacy_annotate_channels_strict_list_enabled();
+
+  if (isLevel2ListEnabled &&
+      (aFlag & nsIClassifiedChannel::ClassificationFlags::
+                   CLASSIFIED_CRYPTOMINING_CONTENT)) {
+    return true;
+  }
+
+  return false;
+}
+
+void UrlClassifierCommon::TablesToString(const nsTArray<nsCString>& aList,
+                                         nsACString& aString) {
+  // Truncate and append rather than assigning because that's more efficient if
+  // aString is an nsAutoCString.
+  aString.Truncate();
+  StringJoinAppend(aString, ","_ns, aList);
+}
+
+uint32_t UrlClassifierCommon::TablesToClassificationFlags(
+    const nsTArray<nsCString>& aList,
+    const std::vector<ClassificationData>& aData, uint32_t aDefaultFlag) {
+  uint32_t flags = 0;
+  for (const nsCString& table : aList) {
+    flags |= TableToClassificationFlag(table, aData);
+  }
+
+  if (flags == 0) {
+    flags |= aDefaultFlag;
+  }
+
+  return flags;
+}
+
+uint32_t UrlClassifierCommon::TableToClassificationFlag(
+    const nsACString& aTable, const std::vector<ClassificationData>& aData) {
+  for (const ClassificationData& data : aData) {
+    if (StringBeginsWith(aTable, data.mPrefix)) {
+      return data.mFlag;
+    }
+  }
+
+  return 0;
+}
+
+/* static */
+bool UrlClassifierCommon::IsPassiveContent(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+  ExtContentPolicyType contentType = loadInfo->GetExternalContentPolicyType();
+
+  // Return true if aChannel is loading passive display content, as
+  // defined by the mixed content blocker.
+  // https://searchfox.org/mozilla-central/rev/c80fa7258c935223fe319c5345b58eae85d4c6ae/dom/security/nsMixedContentBlocker.cpp#532
+  return contentType == ExtContentPolicy::TYPE_IMAGE ||
+         contentType == ExtContentPolicy::TYPE_MEDIA ||
+         (contentType == ExtContentPolicy::TYPE_OBJECT_SUBREQUEST &&
+          !StaticPrefs::security_mixed_content_block_object_subrequest());
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierCommon.h b/netwerk/url-classifier/UrlClassifierCommon.h
new file mode 100644
index 0000000000..c1d92ef981
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierCommon.h
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierCommon_h
+#define mozilla_net_UrlClassifierCommon_h
+
+#include "mozilla/Logging.h"
+#include "nsString.h"
+
+#include <vector>
+
+class nsIChannel;
+class nsIURI;
+
+#define UC_LOG(args) MOZ_LOG(UrlClassifierCommon::sLog, LogLevel::Info, args)
+#define UC_LOG_DEBUG(args) \
+  MOZ_LOG(UrlClassifierCommon::sLog, LogLevel::Debug, args)
+#define UC_LOG_WARN(args) \
+  MOZ_LOG(UrlClassifierCommon::sLog, LogLevel::Warning, args)
+#define UC_LOG_LEAK(args) \
+  MOZ_LOG(UrlClassifierCommon::sLogLeak, LogLevel::Info, args)
+
+#define UC_LOG_ENABLED()                                     \
+  MOZ_LOG_TEST(UrlClassifierCommon::sLog, LogLevel::Info) || \
+      MOZ_LOG_TEST(UrlClassifierCommon::sLogLeak, LogLevel::Info)
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierCommon final {
+ public:
+  static const nsCString::size_type sMaxSpecLength;
+
+  static LazyLogModule sLog;
+  static LazyLogModule sLogLeak;
+
+  static bool AddonMayLoad(nsIChannel* aChannel, nsIURI* aURI);
+
+  static bool ShouldEnableProtectionForChannel(nsIChannel* aChannel);
+
+  static nsresult SetBlockedContent(nsIChannel* channel, nsresult aErrorCode,
+                                    const nsACString& aList,
+                                    const nsACString& aProvider,
+                                    const nsACString& aFullHash);
+
+  static nsresult SetTrackingInfo(nsIChannel* channel,
+                                  const nsTArray<nsCString>& aLists,
+                                  const nsTArray<nsCString>& aFullHashes);
+
+  // Use this function only when you are looking for a pairwise entitylist uri
+  // with the format: http://toplevel.page/?resource=channel.uri.domain
+  static nsresult CreatePairwiseEntityListURI(nsIChannel* aChannel,
+                                              nsIURI** aURI);
+
+  static void AnnotateChannel(nsIChannel* aChannel,
+                              uint32_t aClassificationFlags,
+                              uint32_t aLoadingState);
+
+  static bool IsAllowListed(nsIChannel* aChannel);
+
+  static bool IsTrackingClassificationFlag(uint32_t aFlag, bool aIsPrivate);
+
+  static bool IsSocialTrackingClassificationFlag(uint32_t aFlag);
+
+  static bool IsCryptominingClassificationFlag(uint32_t aFlag, bool aIsPrivate);
+
+  // Join the table names in 1 single string.
+  static void TablesToString(const nsTArray<nsCString>& aList,
+                             nsACString& aString);
+
+  struct ClassificationData {
+    nsCString mPrefix;
+    uint32_t mFlag;
+  };
+
+  // Checks if the entries in aList are part of the ClassificationData vector
+  // and it returns the corresponding flags. If none of them is found, the
+  // default flag is returned.
+  static uint32_t TablesToClassificationFlags(
+      const nsTArray<nsCString>& aList,
+      const std::vector<ClassificationData>& aData, uint32_t aDefaultFlag);
+
+  static bool IsPassiveContent(nsIChannel* aChannel);
+
+  static void SetClassificationFlagsHelper(nsIChannel* aChannel,
+                                           uint32_t aClassificationFlags,
+                                           bool aIsThirdParty);
+
+ private:
+  static uint32_t TableToClassificationFlag(
+      const nsACString& aTable, const std::vector<ClassificationData>& aData);
+
+  friend class AsyncUrlChannelClassifier;
+  static nsresult GetTopWindowURI(nsIChannel* aChannel, nsIURI** aURI);
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierCommon_h
diff --git a/netwerk/url-classifier/UrlClassifierExceptionListService.sys.mjs b/netwerk/url-classifier/UrlClassifierExceptionListService.sys.mjs
new file mode 100644
index 0000000000..8c2bc8a3aa
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierExceptionListService.sys.mjs
@@ -0,0 +1,168 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+export function UrlClassifierExceptionListService() {}
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  RemoteSettings: "resource://services-settings/remote-settings.sys.mjs",
+});
+
+const COLLECTION_NAME = "url-classifier-skip-urls";
+
+class Feature {
+  constructor(name, prefName) {
+    this.name = name;
+    this.prefName = prefName;
+    this.observers = new Set();
+    this.prefValue = null;
+    this.remoteEntries = null;
+
+    if (prefName) {
+      this.prefValue = Services.prefs.getStringPref(this.prefName, null);
+      Services.prefs.addObserver(prefName, this);
+    }
+  }
+
+  async addAndRunObserver(observer) {
+    this.observers.add(observer);
+    this.notifyObservers(observer);
+  }
+
+  removeObserver(observer) {
+    this.observers.delete(observer);
+  }
+
+  observe(subject, topic, data) {
+    if (topic != "nsPref:changed" || data != this.prefName) {
+      console.error(`Unexpected event ${topic} with ${data}`);
+      return;
+    }
+
+    this.prefValue = Services.prefs.getStringPref(this.prefName, null);
+    this.notifyObservers();
+  }
+
+  onRemoteSettingsUpdate(entries) {
+    this.remoteEntries = [];
+
+    for (let entry of entries) {
+      if (entry.feature == this.name) {
+        this.remoteEntries.push(entry.pattern.toLowerCase());
+      }
+    }
+  }
+
+  notifyObservers(observer = null) {
+    let entries = [];
+    if (this.prefValue) {
+      entries = this.prefValue.split(",");
+    }
+
+    if (this.remoteEntries) {
+      for (let entry of this.remoteEntries) {
+        entries.push(entry);
+      }
+    }
+
+    let entriesAsString = entries.join(",").toLowerCase();
+    if (observer) {
+      observer.onExceptionListUpdate(entriesAsString);
+    } else {
+      for (let obs of this.observers) {
+        obs.onExceptionListUpdate(entriesAsString);
+      }
+    }
+  }
+}
+
+UrlClassifierExceptionListService.prototype = {
+  classID: Components.ID("{b9f4fd03-9d87-4bfd-9958-85a821750ddc}"),
+  QueryInterface: ChromeUtils.generateQI([
+    "nsIUrlClassifierExceptionListService",
+  ]),
+
+  features: {},
+  _initialized: false,
+
+  async lazyInit() {
+    if (this._initialized) {
+      return;
+    }
+
+    let rs = lazy.RemoteSettings(COLLECTION_NAME);
+    rs.on("sync", event => {
+      let {
+        data: { current },
+      } = event;
+      this.entries = current || [];
+      this.onUpdateEntries(current);
+    });
+
+    this._initialized = true;
+
+    // If the remote settings list hasn't been populated yet we have to make sure
+    // to do it before firing the first notification.
+    // This has to be run after _initialized is set because we'll be
+    // blocked while getting entries from RemoteSetting, and we don't want
+    // LazyInit is executed again.
+    try {
+      // The data will be initially available from the local DB (via a
+      // resource:// URI).
+      this.entries = await rs.get();
+    } catch (e) {}
+
+    // RemoteSettings.get() could return null, ensure passing a list to
+    // onUpdateEntries.
+    if (!this.entries) {
+      this.entries = [];
+    }
+
+    this.onUpdateEntries(this.entries);
+  },
+
+  onUpdateEntries(entries) {
+    for (let key of Object.keys(this.features)) {
+      let feature = this.features[key];
+      feature.onRemoteSettingsUpdate(entries);
+      feature.notifyObservers();
+    }
+  },
+
+  registerAndRunExceptionListObserver(feature, prefName, observer) {
+    // We don't await this; the caller is C++ and won't await this function,
+    // and because we prevent re-entering into this method, once it's been
+    // called once any subsequent calls will early-return anyway - so
+    // awaiting that would be meaningless. Instead, `Feature` implementations
+    // make sure not to call into observers until they have data, and we
+    // make sure to let feature instances know whether we have data
+    // immediately.
+    this.lazyInit();
+
+    if (!this.features[feature]) {
+      let featureObj = new Feature(feature, prefName);
+      this.features[feature] = featureObj;
+      // If we've previously initialized, we need to pass the entries
+      // we already have to the new feature.
+      if (this.entries) {
+        featureObj.onRemoteSettingsUpdate(this.entries);
+      }
+    }
+    this.features[feature].addAndRunObserver(observer);
+  },
+
+  unregisterExceptionListObserver(feature, observer) {
+    if (!this.features[feature]) {
+      return;
+    }
+    this.features[feature].removeObserver(observer);
+  },
+
+  clear() {
+    this.features = {};
+    this._initialized = false;
+    this.entries = null;
+  },
+};
diff --git a/netwerk/url-classifier/UrlClassifierFeatureBase.cpp b/netwerk/url-classifier/UrlClassifierFeatureBase.cpp
new file mode 100644
index 0000000000..6f5924ab50
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureBase.cpp
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureBase.h"
+#include "Classifier.h"
+#include "mozilla/Preferences.h"
+
+namespace mozilla {
+
+using namespace safebrowsing;
+
+namespace net {
+
+namespace {
+
+void OnPrefsChange(const char* aPrefName, void* aArray) {
+  auto* array = static_cast<nsTArray<nsCString>*>(aArray);
+  MOZ_ASSERT(array);
+
+  nsAutoCString value;
+  Preferences::GetCString(aPrefName, value);
+  Classifier::SplitTables(value, *array);
+}
+
+}  // namespace
+
+NS_INTERFACE_MAP_BEGIN(UrlClassifierFeatureBase)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIUrlClassifierFeature)
+  NS_INTERFACE_MAP_ENTRY(nsIUrlClassifierFeature)
+  NS_INTERFACE_MAP_ENTRY(nsIUrlClassifierExceptionListObserver)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(UrlClassifierFeatureBase)
+NS_IMPL_RELEASE(UrlClassifierFeatureBase)
+
+UrlClassifierFeatureBase::UrlClassifierFeatureBase(
+    const nsACString& aName, const nsACString& aPrefBlocklistTables,
+    const nsACString& aPrefEntitylistTables,
+    const nsACString& aPrefBlocklistHosts,
+    const nsACString& aPrefEntitylistHosts,
+    const nsACString& aPrefBlocklistTableName,
+    const nsACString& aPrefEntitylistTableName,
+    const nsACString& aPrefExceptionHosts)
+    : mName(aName), mPrefExceptionHosts(aPrefExceptionHosts) {
+  static_assert(nsIUrlClassifierFeature::blocklist == 0,
+                "nsIUrlClassifierFeature::blocklist must be 0");
+  static_assert(nsIUrlClassifierFeature::entitylist == 1,
+                "nsIUrlClassifierFeature::entitylist must be 1");
+
+  mPrefTables[nsIUrlClassifierFeature::blocklist] = aPrefBlocklistTables;
+  mPrefTables[nsIUrlClassifierFeature::entitylist] = aPrefEntitylistTables;
+
+  mPrefHosts[nsIUrlClassifierFeature::blocklist] = aPrefBlocklistHosts;
+  mPrefHosts[nsIUrlClassifierFeature::entitylist] = aPrefEntitylistHosts;
+
+  mPrefTableNames[nsIUrlClassifierFeature::blocklist] = aPrefBlocklistTableName;
+  mPrefTableNames[nsIUrlClassifierFeature::entitylist] =
+      aPrefEntitylistTableName;
+}
+
+UrlClassifierFeatureBase::~UrlClassifierFeatureBase() = default;
+
+void UrlClassifierFeatureBase::InitializePreferences() {
+  for (uint32_t i = 0; i < 2; ++i) {
+    if (!mPrefTables[i].IsEmpty()) {
+      Preferences::RegisterCallbackAndCall(OnPrefsChange, mPrefTables[i],
+                                           &mTables[i]);
+    }
+
+    if (!mPrefHosts[i].IsEmpty()) {
+      Preferences::RegisterCallbackAndCall(OnPrefsChange, mPrefHosts[i],
+                                           &mHosts[i]);
+    }
+  }
+
+  nsCOMPtr<nsIUrlClassifierExceptionListService> exceptionListService =
+      do_GetService("@mozilla.org/url-classifier/exception-list-service;1");
+  if (NS_WARN_IF(!exceptionListService)) {
+    return;
+  }
+
+  exceptionListService->RegisterAndRunExceptionListObserver(
+      mName, mPrefExceptionHosts, this);
+}
+
+void UrlClassifierFeatureBase::ShutdownPreferences() {
+  for (uint32_t i = 0; i < 2; ++i) {
+    if (!mPrefTables[i].IsEmpty()) {
+      Preferences::UnregisterCallback(OnPrefsChange, mPrefTables[i],
+                                      &mTables[i]);
+    }
+
+    if (!mPrefHosts[i].IsEmpty()) {
+      Preferences::UnregisterCallback(OnPrefsChange, mPrefHosts[i], &mHosts[i]);
+    }
+  }
+
+  nsCOMPtr<nsIUrlClassifierExceptionListService> exceptionListService =
+      do_GetService("@mozilla.org/url-classifier/exception-list-service;1");
+  if (exceptionListService) {
+    exceptionListService->UnregisterExceptionListObserver(mName, this);
+  }
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::OnExceptionListUpdate(const nsACString& aList) {
+  mExceptionHosts = aList;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::GetName(nsACString& aName) {
+  aName = mName;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::GetTables(nsIUrlClassifierFeature::listType aListType,
+                                    nsTArray<nsCString>& aTables) {
+  if (aListType != nsIUrlClassifierFeature::blocklist &&
+      aListType != nsIUrlClassifierFeature::entitylist) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  aTables = mTables[aListType].Clone();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::HasTable(const nsACString& aTable,
+                                   nsIUrlClassifierFeature::listType aListType,
+                                   bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  if (aListType != nsIUrlClassifierFeature::blocklist &&
+      aListType != nsIUrlClassifierFeature::entitylist) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  *aResult = mTables[aListType].Contains(aTable);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::HasHostInPreferences(
+    const nsACString& aHost, nsIUrlClassifierFeature::listType aListType,
+    nsACString& aPrefTableName, bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  if (aListType != nsIUrlClassifierFeature::blocklist &&
+      aListType != nsIUrlClassifierFeature::entitylist) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  *aResult = mHosts[aListType].Contains(aHost);
+  if (*aResult) {
+    aPrefTableName = mPrefTableNames[aListType];
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureBase::GetExceptionHostList(nsACString& aList) {
+  aList = mExceptionHosts;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureAntiTrackingBase::GetExceptionHostList(nsACString& aList) {
+  if (!StaticPrefs::privacy_antitracking_enableWebcompat()) {
+    aList.Truncate();
+    return NS_OK;
+  }
+
+  return UrlClassifierFeatureBase::GetExceptionHostList(aList);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureBase.h b/netwerk/url-classifier/UrlClassifierFeatureBase.h
new file mode 100644
index 0000000000..79e1f3d087
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureBase.h
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureBase_h
+#define mozilla_net_UrlClassifierFeatureBase_h
+
+#include "nsIUrlClassifierFeature.h"
+#include "nsIUrlClassifierExceptionListService.h"
+#include "nsTArray.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureBase : public nsIUrlClassifierFeature,
+                                 public nsIUrlClassifierExceptionListObserver {
+ public:
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD
+  GetName(nsACString& aName) override;
+
+  NS_IMETHOD
+  GetTables(nsIUrlClassifierFeature::listType aListType,
+            nsTArray<nsCString>& aResult) override;
+
+  NS_IMETHOD
+  HasTable(const nsACString& aTable,
+           nsIUrlClassifierFeature::listType aListType, bool* aResult) override;
+
+  NS_IMETHOD
+  HasHostInPreferences(const nsACString& aHost,
+                       nsIUrlClassifierFeature::listType aListType,
+                       nsACString& aPrefTableName, bool* aResult) override;
+
+  NS_IMETHOD
+  GetExceptionHostList(nsACString& aList) override;
+
+  NS_IMETHOD
+  OnExceptionListUpdate(const nsACString& aList) override;
+
+ protected:
+  UrlClassifierFeatureBase(const nsACString& aName,
+                           const nsACString& aPrefBlocklistTables,
+                           const nsACString& aPrefEntitylistTables,
+                           const nsACString& aPrefBlocklistHosts,
+                           const nsACString& aPrefEntitylistHosts,
+                           const nsACString& aPrefBlocklistTableName,
+                           const nsACString& aPrefEntitylistTableName,
+                           const nsACString& aPrefExceptionHosts);
+
+  virtual ~UrlClassifierFeatureBase();
+
+  void InitializePreferences();
+  void ShutdownPreferences();
+
+  nsCString mName;
+
+ private:
+  nsCString mPrefExceptionHosts;
+
+  // 2: blocklist and entitylist.
+  nsCString mPrefTables[2];
+  nsTArray<nsCString> mTables[2];
+
+  nsCString mPrefHosts[2];
+  nsCString mPrefTableNames[2];
+  nsTArray<nsCString> mHosts[2];
+
+  nsCString mExceptionHosts;
+};
+
+class UrlClassifierFeatureAntiTrackingBase : public UrlClassifierFeatureBase {
+  using UrlClassifierFeatureBase::UrlClassifierFeatureBase;
+
+  NS_IMETHOD
+  GetExceptionHostList(nsACString& aList) override;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureBase_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.cpp b/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.cpp
new file mode 100644
index 0000000000..dbd46eb298
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.cpp
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureCryptominingAnnotation.h"
+
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "nsIClassifiedChannel.h"
+#include "nsContentUtils.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define CRYPTOMINING_ANNOTATION_FEATURE_NAME "cryptomining-annotation"
+
+#define URLCLASSIFIER_CRYPTOMINING_ANNOTATION_BLOCKLIST \
+  "urlclassifier.features.cryptomining.annotate.blacklistTables"
+#define URLCLASSIFIER_CRYPTOMINING_ANNOTATION_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.cryptomining.annotate.blacklistHosts"
+#define URLCLASSIFIER_CRYPTOMINING_ANNOTATION_ENTITYLIST \
+  "urlclassifier.features.cryptomining.annotate.whitelistTables"
+#define URLCLASSIFIER_CRYPTOMINING_ANNOTATION_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.cryptomining.annotate.whitelistHosts"
+#define URLCLASSIFIER_CRYPTOMINING_ANNOTATION_EXCEPTION_URLS \
+  "urlclassifier.features.cryptomining.annotate.skipURLs"
+#define TABLE_CRYPTOMINING_ANNOTATION_BLOCKLIST_PREF \
+  "cryptomining-annotate-blacklist-pref"
+#define TABLE_CRYPTOMINING_ANNOTATION_ENTITYLIST_PREF \
+  "cryptomining-annotate-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureCryptominingAnnotation>
+    gFeatureCryptominingAnnotation;
+
+}  // namespace
+
+UrlClassifierFeatureCryptominingAnnotation::
+    UrlClassifierFeatureCryptominingAnnotation()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(CRYPTOMINING_ANNOTATION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_ANNOTATION_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_ANNOTATION_ENTITYLIST),
+          nsLiteralCString(
+              URLCLASSIFIER_CRYPTOMINING_ANNOTATION_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_CRYPTOMINING_ANNOTATION_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_CRYPTOMINING_ANNOTATION_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_CRYPTOMINING_ANNOTATION_ENTITYLIST_PREF),
+          nsLiteralCString(
+              URLCLASSIFIER_CRYPTOMINING_ANNOTATION_EXCEPTION_URLS)) {}
+/* static */ const char* UrlClassifierFeatureCryptominingAnnotation::Name() {
+  return CRYPTOMINING_ANNOTATION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureCryptominingAnnotation::MaybeInitialize() {
+  UC_LOG_LEAK(("UrlClassifierFeatureCryptominingAnnotation::MaybeInitialize"));
+
+  if (!gFeatureCryptominingAnnotation) {
+    gFeatureCryptominingAnnotation =
+        new UrlClassifierFeatureCryptominingAnnotation();
+    gFeatureCryptominingAnnotation->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureCryptominingAnnotation::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureCryptominingAnnotation::MaybeShutdown"));
+
+  if (gFeatureCryptominingAnnotation) {
+    gFeatureCryptominingAnnotation->ShutdownPreferences();
+    gFeatureCryptominingAnnotation = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureCryptominingAnnotation>
+UrlClassifierFeatureCryptominingAnnotation::MaybeCreate(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureCryptominingAnnotation::MaybeCreate - channel %p",
+       aChannel));
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureCryptominingAnnotation);
+
+  RefPtr<UrlClassifierFeatureCryptominingAnnotation> self =
+      gFeatureCryptominingAnnotation;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureCryptominingAnnotation::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(CRYPTOMINING_ANNOTATION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureCryptominingAnnotation);
+
+  RefPtr<UrlClassifierFeatureCryptominingAnnotation> self =
+      gFeatureCryptominingAnnotation;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCryptominingAnnotation::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  UC_LOG(
+      ("UrlClassifierFeatureCryptominingAnnotation::ProcessChannel - "
+       "annotating channel %p",
+       aChannel));
+
+  static std::vector<UrlClassifierCommon::ClassificationData>
+      sClassificationData = {
+          {"content-cryptomining-track-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_CRYPTOMINING_CONTENT},
+      };
+
+  uint32_t flags = UrlClassifierCommon::TablesToClassificationFlags(
+      aList, sClassificationData,
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_CRYPTOMINING);
+
+  UrlClassifierCommon::SetTrackingInfo(aChannel, aList, aHashes);
+
+  UrlClassifierCommon::AnnotateChannel(
+      aChannel, flags,
+      nsIWebProgressListener::STATE_LOADED_CRYPTOMINING_CONTENT);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCryptominingAnnotation::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.h b/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.h
new file mode 100644
index 0000000000..c843af871d
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCryptominingAnnotation.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureCryptominingAnnotation_h
+#define mozilla_net_UrlClassifierFeatureCryptominingAnnotation_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureCryptominingAnnotation final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureCryptominingAnnotation>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureCryptominingAnnotation();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureCryptominingAnnotation_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.cpp
new file mode 100644
index 0000000000..72406179bc
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.cpp
@@ -0,0 +1,211 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureCryptominingProtection.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "ChannelClassifierService.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define CRYPTOMINING_FEATURE_NAME "cryptomining-protection"
+
+#define URLCLASSIFIER_CRYPTOMINING_BLOCKLIST \
+  "urlclassifier.features.cryptomining.blacklistTables"
+#define URLCLASSIFIER_CRYPTOMINING_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.cryptomining.blacklistHosts"
+#define URLCLASSIFIER_CRYPTOMINING_ENTITYLIST \
+  "urlclassifier.features.cryptomining.whitelistTables"
+#define URLCLASSIFIER_CRYPTOMINING_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.cryptomining.whitelistHosts"
+#define URLCLASSIFIER_CRYPTOMINING_EXCEPTION_URLS \
+  "urlclassifier.features.cryptomining.skipURLs"
+#define TABLE_CRYPTOMINING_BLOCKLIST_PREF "cryptomining-blacklist-pref"
+#define TABLE_CRYPTOMINING_ENTITYLIST_PREF "cryptomining-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureCryptominingProtection>
+    gFeatureCryptominingProtection;
+
+}  // namespace
+
+UrlClassifierFeatureCryptominingProtection::
+    UrlClassifierFeatureCryptominingProtection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(CRYPTOMINING_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_CRYPTOMINING_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_CRYPTOMINING_ENTITYLIST_PREF),
+          nsLiteralCString(URLCLASSIFIER_CRYPTOMINING_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureCryptominingProtection::Name() {
+  return CRYPTOMINING_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureCryptominingProtection::MaybeInitialize() {
+  UC_LOG_LEAK(("UrlClassifierFeatureCryptominingProtection::MaybeInitialize"));
+
+  if (!gFeatureCryptominingProtection) {
+    gFeatureCryptominingProtection =
+        new UrlClassifierFeatureCryptominingProtection();
+    gFeatureCryptominingProtection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureCryptominingProtection::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureCryptominingProtection::MaybeShutdown"));
+
+  if (gFeatureCryptominingProtection) {
+    gFeatureCryptominingProtection->ShutdownPreferences();
+    gFeatureCryptominingProtection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureCryptominingProtection>
+UrlClassifierFeatureCryptominingProtection::MaybeCreate(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureCryptominingProtection::MaybeCreate - channel %p",
+       aChannel));
+
+  if (!StaticPrefs::privacy_trackingprotection_cryptomining_enabled()) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+  if (!isThirdParty) {
+    UC_LOG(
+        ("UrlClassifierFeatureCryptominingProtection::MaybeCreate - "
+         "skipping first party or top-level load for channel %p",
+         aChannel));
+    return nullptr;
+  }
+
+  if (!UrlClassifierCommon::ShouldEnableProtectionForChannel(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureCryptominingProtection);
+
+  RefPtr<UrlClassifierFeatureCryptominingProtection> self =
+      gFeatureCryptominingProtection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureCryptominingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(CRYPTOMINING_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureCryptominingProtection);
+
+  RefPtr<UrlClassifierFeatureCryptominingProtection> self =
+      gFeatureCryptominingProtection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCryptominingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
+
+  // This is a blocking feature.
+  *aShouldContinue = isAllowListed;
+
+  if (isAllowListed) {
+    return NS_OK;
+  }
+
+  nsAutoCString list;
+  UrlClassifierCommon::TablesToString(aList, list);
+
+  ChannelBlockDecision decision =
+      ChannelClassifierService::OnBeforeBlockChannel(aChannel, mName, list);
+  if (decision != ChannelBlockDecision::Blocked) {
+    uint32_t event =
+        decision == ChannelBlockDecision::Replaced
+            ? nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT
+            : nsIWebProgressListener::STATE_ALLOWED_TRACKING_CONTENT;
+
+    // Need to set aBlocked to True if we replace the Cryptominer with a shim,
+    //  since the shim is treated as a blocked event
+    // Note: If we need to account for which kind of tracker was replaced,
+    //  we need to create a new event type in nsIWebProgressListener
+    if (event == nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT) {
+      ContentBlockingNotifier::OnEvent(aChannel, event, true);
+    } else {
+      ContentBlockingNotifier::OnEvent(aChannel, event, false);
+    }
+
+    *aShouldContinue = true;
+    return NS_OK;
+  }
+
+  UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_CRYPTOMINING_URI,
+                                         list, ""_ns, ""_ns);
+
+  UC_LOG(
+      ("UrlClassifierFeatureCryptominingProtection::ProcessChannel - "
+       "cancelling channel %p",
+       aChannel));
+
+  nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
+
+  if (httpChannel) {
+    Unused << httpChannel->CancelByURLClassifier(NS_ERROR_CRYPTOMINING_URI);
+  } else {
+    Unused << aChannel->Cancel(NS_ERROR_CRYPTOMINING_URI);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCryptominingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.h b/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.h
new file mode 100644
index 0000000000..5ff888ab17
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCryptominingProtection.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureCryptominingProtection_h
+#define mozilla_net_UrlClassifierFeatureCryptominingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureCryptominingProtection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureCryptominingProtection>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureCryptominingProtection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureCryptominingProtection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCustomTables.cpp b/netwerk/url-classifier/UrlClassifierFeatureCustomTables.cpp
new file mode 100644
index 0000000000..ec5ad185ae
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCustomTables.cpp
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureCustomTables.h"
+
+namespace mozilla {
+
+NS_INTERFACE_MAP_BEGIN(UrlClassifierFeatureCustomTables)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIUrlClassifierFeature)
+  NS_INTERFACE_MAP_ENTRY(nsIUrlClassifierFeature)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(UrlClassifierFeatureCustomTables)
+NS_IMPL_RELEASE(UrlClassifierFeatureCustomTables)
+
+UrlClassifierFeatureCustomTables::UrlClassifierFeatureCustomTables(
+    const nsACString& aName, const nsTArray<nsCString>& aBlocklistTables,
+    const nsTArray<nsCString>& aEntitylistTables)
+    : mName(aName),
+      mBlocklistTables(aBlocklistTables.Clone()),
+      mEntitylistTables(aEntitylistTables.Clone()) {}
+
+UrlClassifierFeatureCustomTables::~UrlClassifierFeatureCustomTables() = default;
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::GetName(nsACString& aName) {
+  aName = mName;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::GetTables(
+    nsIUrlClassifierFeature::listType aListType, nsTArray<nsCString>& aTables) {
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    aTables = mBlocklistTables.Clone();
+    return NS_OK;
+  }
+
+  if (aListType == nsIUrlClassifierFeature::entitylist) {
+    aTables = mEntitylistTables.Clone();
+    return NS_OK;
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::HasTable(
+    const nsACString& aTable, nsIUrlClassifierFeature::listType aListType,
+    bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aResult = mBlocklistTables.Contains(aTable);
+    return NS_OK;
+  }
+
+  if (aListType == nsIUrlClassifierFeature::entitylist) {
+    *aResult = mEntitylistTables.Contains(aTable);
+    return NS_OK;
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::HasHostInPreferences(
+    const nsACString& aHost, nsIUrlClassifierFeature::listType aListType,
+    nsACString& aPrefTableName, bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::GetExceptionHostList(nsACString& aList) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureCustomTables::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureCustomTables.h b/netwerk/url-classifier/UrlClassifierFeatureCustomTables.h
new file mode 100644
index 0000000000..0fc12243fe
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureCustomTables.h
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_UrlClassifierFeatureCustomTables_h
+#define mozilla_UrlClassifierFeatureCustomTables_h
+
+#include "nsIUrlClassifierFeature.h"
+#include "nsTArray.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+class UrlClassifierFeatureCustomTables : public nsIUrlClassifierFeature {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURLCLASSIFIERFEATURE
+
+  explicit UrlClassifierFeatureCustomTables(
+      const nsACString& aName, const nsTArray<nsCString>& aBlocklistTables,
+      const nsTArray<nsCString>& aEntitylistTables);
+
+ private:
+  virtual ~UrlClassifierFeatureCustomTables();
+
+  nsCString mName;
+  nsTArray<nsCString> mBlocklistTables;
+  nsTArray<nsCString> mEntitylistTables;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_UrlClassifierFeatureCustomTables_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.cpp b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.cpp
new file mode 100644
index 0000000000..d31e34047a
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.cpp
@@ -0,0 +1,268 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureEmailTrackingDataCollection.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/ContentBlockingNotifier.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/Telemetry.h"
+
+#include "nsIChannel.h"
+#include "nsIClassifiedChannel.h"
+#include "nsILoadInfo.h"
+
+namespace mozilla::net {
+
+namespace {
+
+#define EMAILTRACKING_DATACOLLECTION_FEATURE_NAME \
+  "emailtracking-data-collection"
+
+#define URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_BLOCKLIST \
+  "urlclassifier.features.emailtracking.datacollection.blocklistTables"
+#define URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.emailtracking.datacollection.blocklistHosts"
+#define URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_ENTITYLIST \
+  "urlclassifier.features.emailtracking.datacollection.allowlistTables"
+#define URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.emailtracking.datacollection.allowlistHosts"
+#define URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_EXCEPTION_URLS \
+  "urlclassifier.features.emailtracking.datacollection.skipURLs"
+#define TABLE_EMAILTRACKING_DATACOLLECTION_BLOCKLIST_PREF \
+  "emailtracking-data-collection-blocklist-pref"
+#define TABLE_EMAILTRACKING_DATACOLLECTION_ENTITYLIST_PREF \
+  "emailtracking-data-collection-allowlist-pref"
+
+StaticRefPtr<UrlClassifierFeatureEmailTrackingDataCollection>
+    gFeatureEmailTrackingDataCollection;
+StaticAutoPtr<nsCString> gEmailWebAppDomainsPref;
+static constexpr char kEmailWebAppDomainPrefName[] =
+    "privacy.trackingprotection.emailtracking.webapp.domains";
+
+void EmailWebAppDomainPrefChangeCallback(const char* aPrefName, void*) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(!strcmp(aPrefName, kEmailWebAppDomainPrefName));
+  MOZ_ASSERT(gEmailWebAppDomainsPref);
+
+  Preferences::GetCString(kEmailWebAppDomainPrefName, *gEmailWebAppDomainsPref);
+}
+
+}  // namespace
+
+UrlClassifierFeatureEmailTrackingDataCollection::
+    UrlClassifierFeatureEmailTrackingDataCollection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(EMAILTRACKING_DATACOLLECTION_FEATURE_NAME),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_BLOCKLIST),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_ENTITYLIST),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_EMAILTRACKING_DATACOLLECTION_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_EMAILTRACKING_DATACOLLECTION_ENTITYLIST_PREF),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAILTRACKING_DATACOLLECTION_EXCEPTION_URLS)) {}
+
+/* static */
+const char* UrlClassifierFeatureEmailTrackingDataCollection::Name() {
+  return EMAILTRACKING_DATACOLLECTION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureEmailTrackingDataCollection::MaybeInitialize() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureEmailTrackingDataCollection::MaybeInitialize"));
+
+  if (!gFeatureEmailTrackingDataCollection) {
+    gFeatureEmailTrackingDataCollection =
+        new UrlClassifierFeatureEmailTrackingDataCollection();
+    gFeatureEmailTrackingDataCollection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureEmailTrackingDataCollection::MaybeShutdown() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureEmailTrackingDataCollection::MaybeShutdown"));
+
+  if (gFeatureEmailTrackingDataCollection) {
+    gFeatureEmailTrackingDataCollection->ShutdownPreferences();
+    gFeatureEmailTrackingDataCollection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureEmailTrackingDataCollection>
+UrlClassifierFeatureEmailTrackingDataCollection::MaybeCreate(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureEmailTrackingDataCollection::MaybeCreate - channel "
+       "%p",
+       aChannel));
+
+  if (!StaticPrefs::
+          privacy_trackingprotection_emailtracking_data_collection_enabled()) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+
+  // We don't need to collect data if the email tracker is loaded in first-party
+  // context.
+  if (!isThirdParty) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureEmailTrackingDataCollection);
+
+  RefPtr<UrlClassifierFeatureEmailTrackingDataCollection> self =
+      gFeatureEmailTrackingDataCollection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureEmailTrackingDataCollection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(EMAILTRACKING_DATACOLLECTION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureEmailTrackingDataCollection);
+
+  RefPtr<UrlClassifierFeatureEmailTrackingDataCollection> self =
+      gFeatureEmailTrackingDataCollection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureEmailTrackingDataCollection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  UC_LOG(
+      ("UrlClassifierFeatureEmailTrackingDataCollection::ProcessChannel - "
+       "collecting data from channel %p",
+       aChannel));
+
+  static std::vector<UrlClassifierCommon::ClassificationData>
+      sClassificationData = {
+          {"base-email-track-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_EMAILTRACKING},
+          {"content-email-track-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_EMAILTRACKING_CONTENT},
+      };
+
+  // Get if the top window is a email webapp.
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+
+  RefPtr<dom::BrowsingContext> bc;
+  loadInfo->GetBrowsingContext(getter_AddRefs(bc));
+  if (!bc || bc->IsDiscarded()) {
+    return NS_OK;
+  }
+
+  RefPtr<dom::WindowGlobalParent> topWindowParent =
+      bc->Canonical()->GetTopWindowContext();
+  if (!topWindowParent || topWindowParent->IsDiscarded()) {
+    return NS_OK;
+  }
+
+  // Cache the email webapp domains pref value and register the callback
+  // function to update the cached value when the pref changes.
+  if (!gEmailWebAppDomainsPref) {
+    gEmailWebAppDomainsPref = new nsCString();
+
+    Preferences::RegisterCallbackAndCall(EmailWebAppDomainPrefChangeCallback,
+                                         kEmailWebAppDomainPrefName);
+    RunOnShutdown([]() {
+      Preferences::UnregisterCallback(EmailWebAppDomainPrefChangeCallback,
+                                      kEmailWebAppDomainPrefName);
+      gEmailWebAppDomainsPref = nullptr;
+    });
+  }
+
+  bool isTopEmailWebApp = topWindowParent->DocumentPrincipal()->IsURIInList(
+      *gEmailWebAppDomainsPref);
+
+  uint32_t flags = UrlClassifierCommon::TablesToClassificationFlags(
+      aList, sClassificationData,
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_EMAILTRACKING);
+
+  if (flags & nsIClassifiedChannel::ClassificationFlags::
+                  CLASSIFIED_EMAILTRACKING_CONTENT) {
+    Telemetry::AccumulateCategorical(
+        isTopEmailWebApp
+            ? Telemetry::LABELS_EMAIL_TRACKER_COUNT::content_email_webapp
+            : Telemetry::LABELS_EMAIL_TRACKER_COUNT::content_normal);
+
+    // Notify the load event to record the content blocking log.
+    //
+    // Note that we need to change the code here if we decided to block content
+    // email trackers in the future.
+    ContentBlockingNotifier::OnEvent(
+        aChannel,
+        nsIWebProgressListener::STATE_LOADED_EMAILTRACKING_LEVEL_2_CONTENT);
+  } else {
+    Telemetry::AccumulateCategorical(
+        isTopEmailWebApp
+            ? Telemetry::LABELS_EMAIL_TRACKER_COUNT::base_email_webapp
+            : Telemetry::LABELS_EMAIL_TRACKER_COUNT::base_normal);
+    // Notify to record content blocking log. Note that we don't need to notify
+    // if email tracking is enabled because the email tracking protection
+    // feature will be responsible for notifying the blocking event.
+    //
+    // Note that we need to change the code here if we decided to block content
+    // email trackers in the future.
+    if (!StaticPrefs::privacy_trackingprotection_emailtracking_enabled()) {
+      ContentBlockingNotifier::OnEvent(
+          aChannel,
+          nsIWebProgressListener::STATE_LOADED_EMAILTRACKING_LEVEL_1_CONTENT);
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureEmailTrackingDataCollection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace mozilla::net
diff --git a/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.h b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.h
new file mode 100644
index 0000000000..130d56c980
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingDataCollection.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureEmailTrackingDataCollection_h
+#define mozilla_net_UrlClassifierFeatureEmailTrackingDataCollection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+namespace mozilla::net {
+
+class UrlClassifierFeatureEmailTrackingDataCollection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureEmailTrackingDataCollection>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureEmailTrackingDataCollection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace mozilla::net
+
+#endif  // mozilla_net_UrlClassifierFeatureEmailTrackingDataCollection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.cpp
new file mode 100644
index 0000000000..01a18b5381
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.cpp
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureEmailTrackingProtection.h"
+
+#include "ChannelClassifierService.h"
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIChannel.h"
+#include "nsILoadContext.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIWebProgressListener.h"
+#include "nsNetUtil.h"
+
+namespace mozilla::net {
+
+namespace {
+
+#define EMAIL_TRACKING_PROTECTION_FEATURE_NAME "emailtracking-protection"
+
+#define URLCLASSIFIER_EMAIL_TRACKING_BLOCKLIST \
+  "urlclassifier.features.emailtracking.blocklistTables"
+#define URLCLASSIFIER_EMAIL_TRACKING_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.emailtracking.blocklistHosts"
+#define URLCLASSIFIER_EMAIL_TRACKING_ENTITYLIST \
+  "urlclassifier.features.emailtracking.allowlistTables"
+#define URLCLASSIFIER_EMAIL_TRACKING_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.emailtracking.allowlistHosts"
+#define URLCLASSIFIER_EMAIL_TRACKING_PROTECTION_EXCEPTION_URLS \
+  "urlclassifier.features.emailtracking.skipURLs"
+#define TABLE_EMAIL_TRACKING_BLOCKLIST_PREF "emailtracking-blocklist-pref"
+#define TABLE_EMAIL_TRACKING_ENTITYLIST_PREF "emailtracking-allowlist-pref"
+
+StaticRefPtr<UrlClassifierFeatureEmailTrackingProtection>
+    gFeatureEmailTrackingProtection;
+
+}  // namespace
+
+UrlClassifierFeatureEmailTrackingProtection::
+    UrlClassifierFeatureEmailTrackingProtection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(EMAIL_TRACKING_PROTECTION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_EMAIL_TRACKING_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_EMAIL_TRACKING_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_EMAIL_TRACKING_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAIL_TRACKING_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_EMAIL_TRACKING_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_EMAIL_TRACKING_ENTITYLIST_PREF),
+          nsLiteralCString(
+              URLCLASSIFIER_EMAIL_TRACKING_PROTECTION_EXCEPTION_URLS)) {}
+
+/* static */
+const char* UrlClassifierFeatureEmailTrackingProtection::Name() {
+  return EMAIL_TRACKING_PROTECTION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureEmailTrackingProtection::MaybeInitialize() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  UC_LOG_LEAK(("UrlClassifierFeatureEmailTrackingProtection::MaybeInitialize"));
+
+  if (!gFeatureEmailTrackingProtection) {
+    gFeatureEmailTrackingProtection =
+        new UrlClassifierFeatureEmailTrackingProtection();
+    gFeatureEmailTrackingProtection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureEmailTrackingProtection::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureEmailTrackingProtection::MaybeShutdown"));
+
+  if (gFeatureEmailTrackingProtection) {
+    gFeatureEmailTrackingProtection->ShutdownPreferences();
+    gFeatureEmailTrackingProtection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureEmailTrackingProtection>
+UrlClassifierFeatureEmailTrackingProtection::MaybeCreate(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureEmailTrackingProtection::MaybeCreate - channel %p",
+       aChannel));
+
+  // Check if the email tracking protection is enabled.
+  if (!StaticPrefs::privacy_trackingprotection_emailtracking_enabled() &&
+      !(NS_UsePrivateBrowsing(aChannel) &&
+        StaticPrefs::
+            privacy_trackingprotection_emailtracking_pbmode_enabled())) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+  if (!isThirdParty) {
+    UC_LOG(
+        ("UrlClassifierFeatureEmailTrackingProtection::MaybeCreate - "
+         "skipping first party or top-level load for channel %p",
+         aChannel));
+    return nullptr;
+  }
+
+  if (!UrlClassifierCommon::ShouldEnableProtectionForChannel(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureEmailTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureEmailTrackingProtection> self =
+      gFeatureEmailTrackingProtection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureEmailTrackingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(EMAIL_TRACKING_PROTECTION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureEmailTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureEmailTrackingProtection> self =
+      gFeatureEmailTrackingProtection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureEmailTrackingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
+
+  // This is a blocking feature.
+  *aShouldContinue = isAllowListed;
+
+  if (isAllowListed) {
+    return NS_OK;
+  }
+
+  nsAutoCString list;
+  UrlClassifierCommon::TablesToString(aList, list);
+
+  ChannelBlockDecision decision =
+      ChannelClassifierService::OnBeforeBlockChannel(aChannel, mName, list);
+  if (decision != ChannelBlockDecision::Blocked) {
+    uint32_t event =
+        decision == ChannelBlockDecision::Replaced
+            ? nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT
+            : nsIWebProgressListener::STATE_ALLOWED_TRACKING_CONTENT;
+
+    // Need to set aBlocked to True if we replace the Email Tracker with a shim,
+    //  since the shim is treated as a blocked event
+    // Note: If we need to account for which kind of tracker was replaced,
+    //  we need to create a new event type in nsIWebProgressListener
+    if (event == nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT) {
+      ContentBlockingNotifier::OnEvent(aChannel, event, true);
+    } else {
+      ContentBlockingNotifier::OnEvent(aChannel, event, false);
+    }
+
+    *aShouldContinue = true;
+    return NS_OK;
+  }
+
+  UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_EMAILTRACKING_URI,
+                                         list, ""_ns, ""_ns);
+
+  UC_LOG(
+      ("UrlClassifierFeatureEmailTrackingProtection::ProcessChannel - "
+       "cancelling channel %p",
+       aChannel));
+
+  nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
+  if (httpChannel) {
+    Unused << httpChannel->CancelByURLClassifier(NS_ERROR_EMAILTRACKING_URI);
+  } else {
+    Unused << aChannel->Cancel(NS_ERROR_EMAILTRACKING_URI);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureEmailTrackingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace mozilla::net
diff --git a/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.h b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.h
new file mode 100644
index 0000000000..812a60f255
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureEmailTrackingProtection.h
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureEmailTrackingProtection_h
+#define mozilla_net_UrlClassifierFeatureEmailTrackingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla::net {
+
+class UrlClassifierFeatureEmailTrackingProtection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureEmailTrackingProtection>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureEmailTrackingProtection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace mozilla::net
+
+#endif  // mozilla_net_UrlClassifierFeatureEmailTrackingProtection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFactory.cpp b/netwerk/url-classifier/UrlClassifierFeatureFactory.cpp
new file mode 100644
index 0000000000..e3b73eb825
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFactory.cpp
@@ -0,0 +1,404 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+
+// List of Features
+#include "UrlClassifierFeatureCryptominingAnnotation.h"
+#include "UrlClassifierFeatureCryptominingProtection.h"
+#include "UrlClassifierFeatureEmailTrackingDataCollection.h"
+#include "UrlClassifierFeatureEmailTrackingProtection.h"
+#include "UrlClassifierFeatureFingerprintingAnnotation.h"
+#include "UrlClassifierFeatureFingerprintingProtection.h"
+#include "UrlClassifierFeatureLoginReputation.h"
+#include "UrlClassifierFeaturePhishingProtection.h"
+#include "UrlClassifierFeatureSocialTrackingAnnotation.h"
+#include "UrlClassifierFeatureSocialTrackingProtection.h"
+#include "UrlClassifierFeatureTrackingProtection.h"
+#include "UrlClassifierFeatureTrackingAnnotation.h"
+#include "UrlClassifierFeatureCustomTables.h"
+
+#include "nsIWebProgressListener.h"
+#include "nsAppRunner.h"
+
+namespace mozilla {
+namespace net {
+
+/* static */
+void UrlClassifierFeatureFactory::Shutdown() {
+  // We want to expose Features only in the parent process.
+  if (!XRE_IsParentProcess()) {
+    return;
+  }
+
+  UrlClassifierFeatureCryptominingAnnotation::MaybeShutdown();
+  UrlClassifierFeatureCryptominingProtection::MaybeShutdown();
+  UrlClassifierFeatureEmailTrackingDataCollection::MaybeShutdown();
+  UrlClassifierFeatureEmailTrackingProtection::MaybeShutdown();
+  UrlClassifierFeatureFingerprintingAnnotation::MaybeShutdown();
+  UrlClassifierFeatureFingerprintingProtection::MaybeShutdown();
+  UrlClassifierFeatureLoginReputation::MaybeShutdown();
+  UrlClassifierFeaturePhishingProtection::MaybeShutdown();
+  UrlClassifierFeatureSocialTrackingAnnotation::MaybeShutdown();
+  UrlClassifierFeatureSocialTrackingProtection::MaybeShutdown();
+  UrlClassifierFeatureTrackingAnnotation::MaybeShutdown();
+  UrlClassifierFeatureTrackingProtection::MaybeShutdown();
+}
+
+/* static */
+void UrlClassifierFeatureFactory::GetFeaturesFromChannel(
+    nsIChannel* aChannel,
+    nsTArray<nsCOMPtr<nsIUrlClassifierFeature>>& aFeatures) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aChannel);
+
+  nsCOMPtr<nsIUrlClassifierFeature> feature;
+
+  // Note that the order of the features is extremely important! When more than
+  // 1 feature classifies the channel, we call ::ProcessChannel() following this
+  // feature order, and this could produce different results with a different
+  // feature ordering.
+
+  // Email Tracking Data Collection
+  // This needs to be run before other features so that other blocking features
+  // won't stop us to collect data for email trackers. Note that this feature
+  // is not a blocking feature.
+  feature =
+      UrlClassifierFeatureEmailTrackingDataCollection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Email Tracking Protection
+  feature = UrlClassifierFeatureEmailTrackingProtection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Cryptomining Protection
+  feature = UrlClassifierFeatureCryptominingProtection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Fingerprinting Protection
+  feature = UrlClassifierFeatureFingerprintingProtection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // SocialTracking Protection
+  feature = UrlClassifierFeatureSocialTrackingProtection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Tracking Protection
+  feature = UrlClassifierFeatureTrackingProtection::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Cryptomining Annotation
+  feature = UrlClassifierFeatureCryptominingAnnotation::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Fingerprinting Annotation
+  feature = UrlClassifierFeatureFingerprintingAnnotation::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // SocialTracking Annotation
+  feature = UrlClassifierFeatureSocialTrackingAnnotation::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+
+  // Tracking Annotation
+  feature = UrlClassifierFeatureTrackingAnnotation::MaybeCreate(aChannel);
+  if (feature) {
+    aFeatures.AppendElement(feature);
+  }
+}
+
+/* static */
+void UrlClassifierFeatureFactory::GetPhishingProtectionFeatures(
+    nsTArray<RefPtr<nsIUrlClassifierFeature>>& aFeatures) {
+  UrlClassifierFeaturePhishingProtection::MaybeCreate(aFeatures);
+}
+
+/* static */
+nsIUrlClassifierFeature*
+UrlClassifierFeatureFactory::GetFeatureLoginReputation() {
+  return UrlClassifierFeatureLoginReputation::MaybeGetOrCreate();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureFactory::GetFeatureByName(const nsACString& aName) {
+  if (!XRE_IsParentProcess()) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIUrlClassifierFeature> feature;
+
+  // Cryptomining Annotation
+  feature = UrlClassifierFeatureCryptominingAnnotation::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Cryptomining Protection
+  feature = UrlClassifierFeatureCryptominingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Email Tracking Data Collection
+  feature =
+      UrlClassifierFeatureEmailTrackingDataCollection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Email Tracking Protection
+  feature =
+      UrlClassifierFeatureEmailTrackingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Fingerprinting Annotation
+  feature =
+      UrlClassifierFeatureFingerprintingAnnotation::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Fingerprinting Protection
+  feature =
+      UrlClassifierFeatureFingerprintingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // SocialTracking Annotation
+  feature =
+      UrlClassifierFeatureSocialTrackingAnnotation::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // SocialTracking Protection
+  feature =
+      UrlClassifierFeatureSocialTrackingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Tracking Protection
+  feature = UrlClassifierFeatureTrackingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Tracking Annotation
+  feature = UrlClassifierFeatureTrackingAnnotation::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // Login reputation
+  feature = UrlClassifierFeatureLoginReputation::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  // PhishingProtection features
+  feature = UrlClassifierFeaturePhishingProtection::GetIfNameMatches(aName);
+  if (feature) {
+    return feature.forget();
+  }
+
+  return nullptr;
+}
+
+/* static */
+void UrlClassifierFeatureFactory::GetFeatureNames(nsTArray<nsCString>& aArray) {
+  if (!XRE_IsParentProcess()) {
+    return;
+  }
+
+  nsAutoCString name;
+
+  // Cryptomining Annotation
+  name.Assign(UrlClassifierFeatureCryptominingAnnotation::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Cryptomining Protection
+  name.Assign(UrlClassifierFeatureCryptominingProtection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Email Tracking Data Collection
+  name.Assign(UrlClassifierFeatureEmailTrackingDataCollection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Email Tracking Protection
+  name.Assign(UrlClassifierFeatureEmailTrackingProtection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Fingerprinting Annotation
+  name.Assign(UrlClassifierFeatureFingerprintingAnnotation::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Fingerprinting Protection
+  name.Assign(UrlClassifierFeatureFingerprintingProtection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // SocialTracking Annotation
+  name.Assign(UrlClassifierFeatureSocialTrackingAnnotation::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // SocialTracking Protection
+  name.Assign(UrlClassifierFeatureSocialTrackingProtection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Tracking Protection
+  name.Assign(UrlClassifierFeatureTrackingProtection::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Tracking Annotation
+  name.Assign(UrlClassifierFeatureTrackingAnnotation::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // Login reputation
+  name.Assign(UrlClassifierFeatureLoginReputation::Name());
+  if (!name.IsEmpty()) {
+    aArray.AppendElement(name);
+  }
+
+  // PhishingProtection features
+  {
+    nsTArray<nsCString> features;
+    UrlClassifierFeaturePhishingProtection::GetFeatureNames(features);
+    aArray.AppendElements(features);
+  }
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureFactory::CreateFeatureWithTables(
+    const nsACString& aName, const nsTArray<nsCString>& aBlocklistTables,
+    const nsTArray<nsCString>& aEntitylistTables) {
+  nsCOMPtr<nsIUrlClassifierFeature> feature =
+      new UrlClassifierFeatureCustomTables(aName, aBlocklistTables,
+                                           aEntitylistTables);
+  return feature.forget();
+}
+
+namespace {
+
+struct BlockingErrorCode {
+  nsresult mErrorCode;
+  uint32_t mBlockingEventCode;
+  const char* mConsoleMessage;
+  nsCString mConsoleCategory;
+};
+
+static const BlockingErrorCode sBlockingErrorCodes[] = {
+    {NS_ERROR_TRACKING_URI,
+     nsIWebProgressListener::STATE_BLOCKED_TRACKING_CONTENT,
+     "TrackerUriBlocked", "Tracking Protection"_ns},
+    {NS_ERROR_FINGERPRINTING_URI,
+     nsIWebProgressListener::STATE_BLOCKED_FINGERPRINTING_CONTENT,
+     "TrackerUriBlocked", "Tracking Protection"_ns},
+    {NS_ERROR_CRYPTOMINING_URI,
+     nsIWebProgressListener::STATE_BLOCKED_CRYPTOMINING_CONTENT,
+     "TrackerUriBlocked", "Tracking Protection"_ns},
+    {NS_ERROR_SOCIALTRACKING_URI,
+     nsIWebProgressListener::STATE_BLOCKED_SOCIALTRACKING_CONTENT,
+     "TrackerUriBlocked", "Tracking Protection"_ns},
+    {NS_ERROR_EMAILTRACKING_URI,
+     nsIWebProgressListener::STATE_BLOCKED_EMAILTRACKING_CONTENT,
+     "TrackerUriBlocked", "Tracking Protection"_ns},
+};
+
+}  // namespace
+
+/* static */
+bool UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(
+    nsresult aError) {
+  // In theory we can iterate through the features, but at the moment, we can
+  // just have a simple check here.
+  for (const auto& blockingErrorCode : sBlockingErrorCodes) {
+    if (aError == blockingErrorCode.mErrorCode) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/* static */
+bool UrlClassifierFeatureFactory::IsClassifierBlockingEventCode(
+    uint32_t aEventCode) {
+  for (const auto& blockingErrorCode : sBlockingErrorCodes) {
+    if (aEventCode == blockingErrorCode.mBlockingEventCode) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/* static */
+uint32_t UrlClassifierFeatureFactory::GetClassifierBlockingEventCode(
+    nsresult aErrorCode) {
+  for (const auto& blockingErrorCode : sBlockingErrorCodes) {
+    if (aErrorCode == blockingErrorCode.mErrorCode) {
+      return blockingErrorCode.mBlockingEventCode;
+    }
+  }
+  return 0;
+}
+
+/* static */ const char*
+UrlClassifierFeatureFactory::ClassifierBlockingErrorCodeToConsoleMessage(
+    nsresult aError, nsACString& aCategory) {
+  for (const auto& blockingErrorCode : sBlockingErrorCodes) {
+    if (aError == blockingErrorCode.mErrorCode) {
+      aCategory = blockingErrorCode.mConsoleCategory;
+      return blockingErrorCode.mConsoleMessage;
+    }
+  }
+
+  return nullptr;
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFactory.h b/netwerk/url-classifier/UrlClassifierFeatureFactory.h
new file mode 100644
index 0000000000..a3b823ac49
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFactory.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureFactory_h
+#define mozilla_net_UrlClassifierFeatureFactory_h
+
+#include "nsCOMPtr.h"
+#include "nsTArray.h"
+
+class nsIChannel;
+class nsIUrlClassifierFeature;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureFactory final {
+ public:
+  static void Shutdown();
+
+  static void GetFeaturesFromChannel(
+      nsIChannel* aChannel,
+      nsTArray<nsCOMPtr<nsIUrlClassifierFeature>>& aFeatures);
+
+  static void GetPhishingProtectionFeatures(
+      nsTArray<RefPtr<nsIUrlClassifierFeature>>& aFeatures);
+
+  static nsIUrlClassifierFeature* GetFeatureLoginReputation();
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetFeatureByName(
+      const nsACString& aName);
+
+  static void GetFeatureNames(nsTArray<nsCString>& aArray);
+
+  static already_AddRefed<nsIUrlClassifierFeature> CreateFeatureWithTables(
+      const nsACString& aName, const nsTArray<nsCString>& aBlocklistTables,
+      const nsTArray<nsCString>& aEntitylistTables);
+
+  // Returns true if this error is known as one of the blocking error codes.
+  static bool IsClassifierBlockingErrorCode(nsresult aError);
+
+  // Returns true if this event is a known blocking state from
+  // nsIWebProgressListener.
+  static bool IsClassifierBlockingEventCode(uint32_t aEventCode);
+
+  static uint32_t GetClassifierBlockingEventCode(nsresult aErrorCode);
+
+  // This can be called only if IsClassifierBlockingErrorCode(aError) returns
+  // true.
+  static const char* ClassifierBlockingErrorCodeToConsoleMessage(
+      nsresult aError, nsACString& aCategory);
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureFactory_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.cpp b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.cpp
new file mode 100644
index 0000000000..e5cd9a65f7
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.cpp
@@ -0,0 +1,178 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureFingerprintingAnnotation.h"
+
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "nsIClassifiedChannel.h"
+#include "nsContentUtils.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define FINGERPRINTING_ANNOTATION_FEATURE_NAME "fingerprinting-annotation"
+
+#define URLCLASSIFIER_FINGERPRINTING_ANNOTATION_BLOCKLIST \
+  "urlclassifier.features.fingerprinting.annotate.blacklistTables"
+#define URLCLASSIFIER_FINGERPRINTING_ANNOTATION_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.fingerprinting.annotate.blacklistHosts"
+#define URLCLASSIFIER_FINGERPRINTING_ANNOTATION_ENTITYLIST \
+  "urlclassifier.features.fingerprinting.annotate.whitelistTables"
+#define URLCLASSIFIER_FINGERPRINTING_ANNOTATION_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.fingerprinting.annotate.whitelistHosts"
+#define URLCLASSIFIER_FINGERPRINTING_ANNOTATION_EXCEPTION_URLS \
+  "urlclassifier.features.fingerprinting.annotate.skipURLs"
+#define TABLE_FINGERPRINTING_ANNOTATION_BLOCKLIST_PREF \
+  "fingerprinting-annotate-blacklist-pref"
+#define TABLE_FINGERPRINTING_ANNOTATION_ENTITYLIST_PREF \
+  "fingerprinting-annotate-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureFingerprintingAnnotation>
+    gFeatureFingerprintingAnnotation;
+
+}  // namespace
+
+UrlClassifierFeatureFingerprintingAnnotation::
+    UrlClassifierFeatureFingerprintingAnnotation()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(FINGERPRINTING_ANNOTATION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_ANNOTATION_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_ANNOTATION_ENTITYLIST),
+          nsLiteralCString(
+              URLCLASSIFIER_FINGERPRINTING_ANNOTATION_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_FINGERPRINTING_ANNOTATION_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_FINGERPRINTING_ANNOTATION_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_FINGERPRINTING_ANNOTATION_ENTITYLIST_PREF),
+          nsLiteralCString(
+              URLCLASSIFIER_FINGERPRINTING_ANNOTATION_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureFingerprintingAnnotation::Name() {
+  return FINGERPRINTING_ANNOTATION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureFingerprintingAnnotation::MaybeInitialize() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureFingerprintingAnnotation::MaybeInitialize"));
+
+  if (!gFeatureFingerprintingAnnotation) {
+    gFeatureFingerprintingAnnotation =
+        new UrlClassifierFeatureFingerprintingAnnotation();
+    gFeatureFingerprintingAnnotation->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureFingerprintingAnnotation::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureFingerprintingAnnotation::MaybeShutdown"));
+
+  if (gFeatureFingerprintingAnnotation) {
+    gFeatureFingerprintingAnnotation->ShutdownPreferences();
+    gFeatureFingerprintingAnnotation = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureFingerprintingAnnotation>
+UrlClassifierFeatureFingerprintingAnnotation::MaybeCreate(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureFingerprintingAnnotation::MaybeCreate - channel %p",
+       aChannel));
+
+  if (UrlClassifierCommon::IsPassiveContent(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureFingerprintingAnnotation);
+
+  RefPtr<UrlClassifierFeatureFingerprintingAnnotation> self =
+      gFeatureFingerprintingAnnotation;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureFingerprintingAnnotation::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(FINGERPRINTING_ANNOTATION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureFingerprintingAnnotation);
+
+  RefPtr<UrlClassifierFeatureFingerprintingAnnotation> self =
+      gFeatureFingerprintingAnnotation;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureFingerprintingAnnotation::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  UC_LOG(
+      ("UrlClassifierFeatureFingerprintingAnnotation::ProcessChannel - "
+       "annotating channel %p",
+       aChannel));
+
+  static std::vector<UrlClassifierCommon::ClassificationData>
+      sClassificationData = {
+          {"content-fingerprinting-track-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_FINGERPRINTING_CONTENT},
+      };
+
+  uint32_t flags = UrlClassifierCommon::TablesToClassificationFlags(
+      aList, sClassificationData,
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_FINGERPRINTING);
+
+  UrlClassifierCommon::SetTrackingInfo(aChannel, aList, aHashes);
+
+  UrlClassifierCommon::AnnotateChannel(
+      aChannel, flags,
+      nsIWebProgressListener::STATE_LOADED_FINGERPRINTING_CONTENT);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureFingerprintingAnnotation::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.h b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.h
new file mode 100644
index 0000000000..ab9dff2f66
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingAnnotation.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureFingerprintingAnnotation_h
+#define mozilla_net_UrlClassifierFeatureFingerprintingAnnotation_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureFingerprintingAnnotation final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureFingerprintingAnnotation>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureFingerprintingAnnotation();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureFingerprintingAnnotation_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.cpp
new file mode 100644
index 0000000000..16a352e484
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.cpp
@@ -0,0 +1,216 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureFingerprintingProtection.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "ChannelClassifierService.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define FINGERPRINTING_FEATURE_NAME "fingerprinting-protection"
+
+#define URLCLASSIFIER_FINGERPRINTING_BLOCKLIST \
+  "urlclassifier.features.fingerprinting.blacklistTables"
+#define URLCLASSIFIER_FINGERPRINTING_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.fingerprinting.blacklistHosts"
+#define URLCLASSIFIER_FINGERPRINTING_ENTITYLIST \
+  "urlclassifier.features.fingerprinting.whitelistTables"
+#define URLCLASSIFIER_FINGERPRINTING_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.fingerprinting.whitelistHosts"
+#define URLCLASSIFIER_FINGERPRINTING_EXCEPTION_URLS \
+  "urlclassifier.features.fingerprinting.skipURLs"
+#define TABLE_FINGERPRINTING_BLOCKLIST_PREF "fingerprinting-blacklist-pref"
+#define TABLE_FINGERPRINTING_ENTITYLIST_PREF "fingerprinting-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureFingerprintingProtection>
+    gFeatureFingerprintingProtection;
+
+}  // namespace
+
+UrlClassifierFeatureFingerprintingProtection::
+    UrlClassifierFeatureFingerprintingProtection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(FINGERPRINTING_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_FINGERPRINTING_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_FINGERPRINTING_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_FINGERPRINTING_ENTITYLIST_PREF),
+          nsLiteralCString(URLCLASSIFIER_FINGERPRINTING_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureFingerprintingProtection::Name() {
+  return FINGERPRINTING_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureFingerprintingProtection::MaybeInitialize() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureFingerprintingProtection::MaybeInitialize"));
+
+  if (!gFeatureFingerprintingProtection) {
+    gFeatureFingerprintingProtection =
+        new UrlClassifierFeatureFingerprintingProtection();
+    gFeatureFingerprintingProtection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureFingerprintingProtection::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureFingerprintingProtection::MaybeShutdown"));
+
+  if (gFeatureFingerprintingProtection) {
+    gFeatureFingerprintingProtection->ShutdownPreferences();
+    gFeatureFingerprintingProtection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureFingerprintingProtection>
+UrlClassifierFeatureFingerprintingProtection::MaybeCreate(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureFingerprintingProtection::MaybeCreate - channel %p",
+       aChannel));
+
+  if (!StaticPrefs::privacy_trackingprotection_fingerprinting_enabled()) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+  if (!isThirdParty) {
+    UC_LOG(
+        ("UrlClassifierFeatureFingerprintingProtection::MaybeCreate - "
+         "skipping first party or top-level load for channel %p",
+         aChannel));
+    return nullptr;
+  }
+
+  if (UrlClassifierCommon::IsPassiveContent(aChannel)) {
+    return nullptr;
+  }
+
+  if (!UrlClassifierCommon::ShouldEnableProtectionForChannel(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureFingerprintingProtection);
+
+  RefPtr<UrlClassifierFeatureFingerprintingProtection> self =
+      gFeatureFingerprintingProtection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureFingerprintingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(FINGERPRINTING_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureFingerprintingProtection);
+
+  RefPtr<UrlClassifierFeatureFingerprintingProtection> self =
+      gFeatureFingerprintingProtection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureFingerprintingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
+
+  // This is a blocking feature.
+  *aShouldContinue = isAllowListed;
+
+  if (isAllowListed) {
+    return NS_OK;
+  }
+
+  nsAutoCString list;
+  UrlClassifierCommon::TablesToString(aList, list);
+
+  ChannelBlockDecision decision =
+      ChannelClassifierService::OnBeforeBlockChannel(aChannel, mName, list);
+  if (decision != ChannelBlockDecision::Blocked) {
+    uint32_t event =
+        decision == ChannelBlockDecision::Replaced
+            ? nsIWebProgressListener::STATE_REPLACED_FINGERPRINTING_CONTENT
+            : nsIWebProgressListener::STATE_ALLOWED_FINGERPRINTING_CONTENT;
+
+    // Need to set aBlocked to True if we replace the Fingerprinter with a shim,
+    //  since the shim is treated as a blocked event
+    if (event ==
+        nsIWebProgressListener::STATE_REPLACED_FINGERPRINTING_CONTENT) {
+      ContentBlockingNotifier::OnEvent(aChannel, event, true);
+    } else {
+      ContentBlockingNotifier::OnEvent(aChannel, event, false);
+    }
+
+    *aShouldContinue = true;
+    return NS_OK;
+  }
+
+  UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_FINGERPRINTING_URI,
+                                         list, ""_ns, ""_ns);
+
+  UC_LOG(
+      ("UrlClassifierFeatureFingerprintingProtection::ProcessChannel - "
+       "cancelling channel %p",
+       aChannel));
+
+  nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
+  if (httpChannel) {
+    Unused << httpChannel->CancelByURLClassifier(NS_ERROR_FINGERPRINTING_URI);
+  } else {
+    Unused << aChannel->Cancel(NS_ERROR_FINGERPRINTING_URI);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureFingerprintingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.h b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.h
new file mode 100644
index 0000000000..2ef0a4fea7
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureFingerprintingProtection.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureFingerprintingProtection_h
+#define mozilla_net_UrlClassifierFeatureFingerprintingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureFingerprintingProtection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureFingerprintingProtection>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureFingerprintingProtection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureFingerprintingProtection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.cpp b/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.cpp
new file mode 100644
index 0000000000..e9c21e9e00
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.cpp
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureLoginReputation.h"
+
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/StaticPtr.h"
+#include "UrlClassifierCommon.h"
+#include "nsCOMPtr.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define LOGIN_REPUTATION_FEATURE_NAME "login-reputation"
+
+#define PREF_PASSWORD_ALLOW_TABLE "urlclassifier.passwordAllowTable"
+
+StaticRefPtr<UrlClassifierFeatureLoginReputation> gFeatureLoginReputation;
+
+}  // namespace
+
+UrlClassifierFeatureLoginReputation::UrlClassifierFeatureLoginReputation()
+    : UrlClassifierFeatureBase(nsLiteralCString(LOGIN_REPUTATION_FEATURE_NAME),
+                               ""_ns,  // blocklist tables
+                               nsLiteralCString(PREF_PASSWORD_ALLOW_TABLE),
+                               ""_ns,  // blocklist pref
+                               ""_ns,  // entitylist pref
+                               ""_ns,  // blocklist pref table name
+                               ""_ns,  // entitylist pref table name
+                               ""_ns)  // exception host pref
+{}
+
+/* static */ const char* UrlClassifierFeatureLoginReputation::Name() {
+  return StaticPrefs::browser_safebrowsing_passwords_enabled()
+             ? LOGIN_REPUTATION_FEATURE_NAME
+             : "";
+}
+
+/* static */
+void UrlClassifierFeatureLoginReputation::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureLoginReputation::MaybeShutdown"));
+
+  if (gFeatureLoginReputation) {
+    gFeatureLoginReputation->ShutdownPreferences();
+    gFeatureLoginReputation = nullptr;
+  }
+}
+
+/* static */
+nsIUrlClassifierFeature*
+UrlClassifierFeatureLoginReputation::MaybeGetOrCreate() {
+  if (!StaticPrefs::browser_safebrowsing_passwords_enabled()) {
+    return nullptr;
+  }
+
+  if (!gFeatureLoginReputation) {
+    gFeatureLoginReputation = new UrlClassifierFeatureLoginReputation();
+    gFeatureLoginReputation->InitializePreferences();
+  }
+
+  return gFeatureLoginReputation;
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureLoginReputation::GetIfNameMatches(const nsACString& aName) {
+  if (!aName.EqualsLiteral(LOGIN_REPUTATION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIUrlClassifierFeature> self = MaybeGetOrCreate();
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureLoginReputation::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  MOZ_CRASH(
+      "UrlClassifierFeatureLoginReputation::ProcessChannel should never be "
+      "called");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureLoginReputation::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist,
+             "UrlClassifierFeatureLoginReputation is meant to be used just to "
+             "entitylist URLs");
+  *aURIType = nsIUrlClassifierFeature::URIType::entitylistURI;
+  return aChannel->GetURI(aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.h b/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.h
new file mode 100644
index 0000000000..31fe7b5b0a
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureLoginReputation.h
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureLoginReputation_h
+#define mozilla_net_UrlClassifierFeatureLoginReputation_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureLoginReputation final
+    : public UrlClassifierFeatureBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static nsIUrlClassifierFeature* MaybeGetOrCreate();
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureLoginReputation();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_UrlClassifierFeatureLoginReputation_h
diff --git a/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.cpp
new file mode 100644
index 0000000000..d03f9c790b
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.cpp
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeaturePhishingProtection.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "nsCOMPtr.h"
+
+namespace mozilla {
+namespace net {
+
+struct UrlClassifierFeaturePhishingProtection::PhishingProtectionFeature {
+  const char* mName;
+  const char* mBlocklistPrefTables;
+  bool (*mPref)();
+
+  RefPtr<UrlClassifierFeaturePhishingProtection> mFeature;
+};
+
+namespace {
+
+struct UrlClassifierFeaturePhishingProtection::PhishingProtectionFeature
+    sPhishingProtectionFeaturesMap[] = {
+        {"malware", "urlclassifier.malwareTable",
+         StaticPrefs::browser_safebrowsing_malware_enabled},
+        {"phishing", "urlclassifier.phishTable",
+         StaticPrefs::browser_safebrowsing_phishing_enabled},
+        {"blockedURIs", "urlclassifier.blockedTable",
+         StaticPrefs::browser_safebrowsing_blockedURIs_enabled},
+};
+
+}  // namespace
+
+UrlClassifierFeaturePhishingProtection::UrlClassifierFeaturePhishingProtection(
+    const UrlClassifierFeaturePhishingProtection::PhishingProtectionFeature&
+        aFeature)
+    : UrlClassifierFeatureBase(
+          nsDependentCString(aFeature.mName),
+          nsDependentCString(aFeature.mBlocklistPrefTables),
+          ""_ns,    // aPrefEntitylistPrefTbles,
+          ""_ns,    // aPrefBlocklistHosts
+          ""_ns,    // aPrefEntitylistHosts
+          ""_ns,    // aPrefBlocklistTableName
+          ""_ns,    // aPrefEntitylistTableName
+          ""_ns) {  // aPrefExceptionHosts
+}
+
+/* static */
+void UrlClassifierFeaturePhishingProtection::GetFeatureNames(
+    nsTArray<nsCString>& aArray) {
+  for (const PhishingProtectionFeature& feature :
+       sPhishingProtectionFeaturesMap) {
+    if (feature.mPref()) {
+      aArray.AppendElement(nsDependentCString(feature.mName));
+    }
+  }
+}
+
+/* static */
+void UrlClassifierFeaturePhishingProtection::MaybeInitialize() {
+  for (PhishingProtectionFeature& feature : sPhishingProtectionFeaturesMap) {
+    if (!feature.mFeature && feature.mPref()) {
+      feature.mFeature = new UrlClassifierFeaturePhishingProtection(feature);
+      feature.mFeature->InitializePreferences();
+    }
+  }
+}
+
+/* static */
+void UrlClassifierFeaturePhishingProtection::MaybeShutdown() {
+  for (PhishingProtectionFeature& feature : sPhishingProtectionFeaturesMap) {
+    if (feature.mFeature) {
+      feature.mFeature->ShutdownPreferences();
+      feature.mFeature = nullptr;
+    }
+  }
+}
+
+/* static */
+void UrlClassifierFeaturePhishingProtection::MaybeCreate(
+    nsTArray<RefPtr<nsIUrlClassifierFeature>>& aFeatures) {
+  MaybeInitialize();
+
+  for (const PhishingProtectionFeature& feature :
+       sPhishingProtectionFeaturesMap) {
+    if (feature.mPref()) {
+      MOZ_ASSERT(feature.mFeature);
+      aFeatures.AppendElement(feature.mFeature);
+    }
+  }
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeaturePhishingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  MaybeInitialize();
+
+  for (const PhishingProtectionFeature& feature :
+       sPhishingProtectionFeaturesMap) {
+    if (feature.mPref() && aName.Equals(feature.mName)) {
+      MOZ_ASSERT(feature.mFeature);
+      nsCOMPtr<nsIUrlClassifierFeature> self = feature.mFeature.get();
+      return self.forget();
+    }
+  }
+
+  return nullptr;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeaturePhishingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeaturePhishingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.h b/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.h
new file mode 100644
index 0000000000..d5498cbb72
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeaturePhishingProtection.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_UrlClassifierFeaturePhishingProtection_h
+#define mozilla_UrlClassifierFeaturePhishingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeaturePhishingProtection final
+    : public UrlClassifierFeatureBase {
+ public:
+  struct PhishingProtectionFeature;
+
+  static void GetFeatureNames(nsTArray<nsCString>& aArray);
+
+  static void MaybeShutdown();
+
+  static void MaybeCreate(nsTArray<RefPtr<nsIUrlClassifierFeature>>& aFeatures);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD
+  ProcessChannel(nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+                 const nsTArray<nsCString>& aHashes,
+                 bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  explicit UrlClassifierFeaturePhishingProtection(
+      const PhishingProtectionFeature& aFeature);
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_UrlClassifierFeaturePhishingProtection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureResult.cpp b/netwerk/url-classifier/UrlClassifierFeatureResult.cpp
new file mode 100644
index 0000000000..464c6cefe0
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureResult.cpp
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/net/UrlClassifierFeatureResult.h"
+
+namespace mozilla {
+namespace net {
+
+UrlClassifierFeatureResult::UrlClassifierFeatureResult(
+    nsIURI* aURI, nsIUrlClassifierFeature* aFeature, const nsACString& aList)
+    : mURI(aURI), mFeature(aFeature), mList(aList) {}
+
+UrlClassifierFeatureResult::~UrlClassifierFeatureResult() = default;
+
+NS_IMETHODIMP
+UrlClassifierFeatureResult::GetUri(nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aURI);
+  nsCOMPtr<nsIURI> uri = mURI;
+  uri.forget(aURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureResult::GetFeature(nsIUrlClassifierFeature** aFeature) {
+  NS_ENSURE_ARG_POINTER(aFeature);
+  nsCOMPtr<nsIUrlClassifierFeature> feature = mFeature;
+  feature.forget(aFeature);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureResult::GetList(nsACString& aList) {
+  aList = mList;
+  return NS_OK;
+}
+
+NS_INTERFACE_MAP_BEGIN(UrlClassifierFeatureResult)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIUrlClassifierFeatureResult)
+  NS_INTERFACE_MAP_ENTRY(nsIUrlClassifierFeatureResult)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(UrlClassifierFeatureResult)
+NS_IMPL_RELEASE(UrlClassifierFeatureResult)
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureResult.h b/netwerk/url-classifier/UrlClassifierFeatureResult.h
new file mode 100644
index 0000000000..fba6c95c9b
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureResult.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureResult_h
+#define mozilla_net_UrlClassifierFeatureResult_h
+
+#include "nsIUrlClassifierFeature.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsIURI.h"
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureResult final : public nsIUrlClassifierFeatureResult {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURLCLASSIFIERFEATURERESULT
+
+  UrlClassifierFeatureResult(nsIURI* aURI, nsIUrlClassifierFeature* aFeature,
+                             const nsACString& aList);
+
+  nsIURI* URI() const { return mURI; }
+
+  nsIUrlClassifierFeature* Feature() const { return mFeature; }
+
+  // Comma separated list of tables.
+  const nsCString& List() const { return mList; }
+
+ protected:
+  ~UrlClassifierFeatureResult();
+
+ private:
+  nsCOMPtr<nsIURI> mURI;
+  nsCOMPtr<nsIUrlClassifierFeature> mFeature;
+  const nsCString mList;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureResult_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.cpp b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.cpp
new file mode 100644
index 0000000000..e464c0c815
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.cpp
@@ -0,0 +1,178 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureSocialTrackingAnnotation.h"
+
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "nsIClassifiedChannel.h"
+#include "nsContentUtils.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define SOCIALTRACKING_ANNOTATION_FEATURE_NAME "socialtracking-annotation"
+
+#define URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_BLOCKLIST \
+  "urlclassifier.features.socialtracking.annotate.blacklistTables"
+#define URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.socialtracking.annotate.blacklistHosts"
+#define URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_ENTITYLIST \
+  "urlclassifier.features.socialtracking.annotate.whitelistTables"
+#define URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.socialtracking.annotate.whitelistHosts"
+#define URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_EXCEPTION_URLS \
+  "urlclassifier.features.socialtracking.annotate.skipURLs"
+#define TABLE_SOCIALTRACKING_ANNOTATION_BLOCKLIST_PREF \
+  "socialtracking-annotate-blacklist-pref"
+#define TABLE_SOCIALTRACKING_ANNOTATION_ENTITYLIST_PREF \
+  "socialtracking-annotate-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureSocialTrackingAnnotation>
+    gFeatureSocialTrackingAnnotation;
+
+}  // namespace
+
+UrlClassifierFeatureSocialTrackingAnnotation::
+    UrlClassifierFeatureSocialTrackingAnnotation()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(SOCIALTRACKING_ANNOTATION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_ENTITYLIST),
+          nsLiteralCString(
+              URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_SOCIALTRACKING_ANNOTATION_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_SOCIALTRACKING_ANNOTATION_ENTITYLIST_PREF),
+          nsLiteralCString(
+              URLCLASSIFIER_SOCIALTRACKING_ANNOTATION_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureSocialTrackingAnnotation::Name() {
+  return SOCIALTRACKING_ANNOTATION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureSocialTrackingAnnotation::MaybeInitialize() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureSocialTrackingAnnotation::MaybeInitialize"));
+
+  if (!gFeatureSocialTrackingAnnotation) {
+    gFeatureSocialTrackingAnnotation =
+        new UrlClassifierFeatureSocialTrackingAnnotation();
+    gFeatureSocialTrackingAnnotation->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureSocialTrackingAnnotation::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureSocialTrackingAnnotation::MaybeShutdown"));
+
+  if (gFeatureSocialTrackingAnnotation) {
+    gFeatureSocialTrackingAnnotation->ShutdownPreferences();
+    gFeatureSocialTrackingAnnotation = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureSocialTrackingAnnotation>
+UrlClassifierFeatureSocialTrackingAnnotation::MaybeCreate(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureSocialTrackingAnnotation::MaybeCreate - channel %p",
+       aChannel));
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureSocialTrackingAnnotation);
+
+  RefPtr<UrlClassifierFeatureSocialTrackingAnnotation> self =
+      gFeatureSocialTrackingAnnotation;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureSocialTrackingAnnotation::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(SOCIALTRACKING_ANNOTATION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureSocialTrackingAnnotation);
+
+  RefPtr<UrlClassifierFeatureSocialTrackingAnnotation> self =
+      gFeatureSocialTrackingAnnotation;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureSocialTrackingAnnotation::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  UC_LOG(
+      ("UrlClassifierFeatureSocialTrackingAnnotation::ProcessChannel"
+       "annotating channel %p",
+       aChannel));
+
+  static std::vector<UrlClassifierCommon::ClassificationData>
+      sClassificationData = {
+          {"social-tracking-protection-facebook-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_SOCIALTRACKING_FACEBOOK},
+          {"social-tracking-protection-linkedin-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_SOCIALTRACKING_LINKEDIN},
+          {"social-tracking-protection-twitter-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::
+               CLASSIFIED_SOCIALTRACKING_TWITTER},
+      };
+
+  uint32_t flags = UrlClassifierCommon::TablesToClassificationFlags(
+      aList, sClassificationData,
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_SOCIALTRACKING);
+
+  UrlClassifierCommon::AnnotateChannel(
+      aChannel, flags,
+      nsIWebProgressListener::STATE_LOADED_SOCIALTRACKING_CONTENT);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureSocialTrackingAnnotation::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.h b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.h
new file mode 100644
index 0000000000..1178bb8b29
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingAnnotation.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureSocialTrackingAnnotation_h
+#define mozilla_net_UrlClassifierFeatureSocialTrackingAnnotation_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureSocialTrackingAnnotation final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureSocialTrackingAnnotation>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureSocialTrackingAnnotation();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureSocialTrackingAnnotation_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.cpp
new file mode 100644
index 0000000000..a2ca7459db
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.cpp
@@ -0,0 +1,213 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureSocialTrackingProtection.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "ChannelClassifierService.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIWebProgressListener.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIChannel.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define SOCIALTRACKING_FEATURE_NAME "socialtracking-protection"
+
+#define URLCLASSIFIER_SOCIALTRACKING_BLOCKLIST \
+  "urlclassifier.features.socialtracking.blacklistTables"
+#define URLCLASSIFIER_SOCIALTRACKING_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.features.socialtracking.blacklistHosts"
+#define URLCLASSIFIER_SOCIALTRACKING_ENTITYLIST \
+  "urlclassifier.features.socialtracking.whitelistTables"
+#define URLCLASSIFIER_SOCIALTRACKING_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.features.socialtracking.whitelistHosts"
+#define URLCLASSIFIER_SOCIALTRACKING_EXCEPTION_URLS \
+  "urlclassifier.features.socialtracking.skipURLs"
+#define TABLE_SOCIALTRACKING_BLOCKLIST_PREF "socialtracking-blocklist-pref"
+#define TABLE_SOCIALTRACKING_ENTITYLIST_PREF "socialtracking-entitylist-pref"
+
+StaticRefPtr<UrlClassifierFeatureSocialTrackingProtection>
+    gFeatureSocialTrackingProtection;
+
+}  // namespace
+
+UrlClassifierFeatureSocialTrackingProtection::
+    UrlClassifierFeatureSocialTrackingProtection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(SOCIALTRACKING_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(
+              URLCLASSIFIER_SOCIALTRACKING_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_SOCIALTRACKING_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_SOCIALTRACKING_ENTITYLIST_PREF),
+          nsLiteralCString(URLCLASSIFIER_SOCIALTRACKING_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureSocialTrackingProtection::Name() {
+  return SOCIALTRACKING_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureSocialTrackingProtection::MaybeInitialize() {
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureSocialTrackingProtection::MaybeInitialize"));
+
+  if (!gFeatureSocialTrackingProtection) {
+    gFeatureSocialTrackingProtection =
+        new UrlClassifierFeatureSocialTrackingProtection();
+    gFeatureSocialTrackingProtection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureSocialTrackingProtection::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureSocialTrackingProtection::MaybeShutdown"));
+
+  if (gFeatureSocialTrackingProtection) {
+    gFeatureSocialTrackingProtection->ShutdownPreferences();
+    gFeatureSocialTrackingProtection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureSocialTrackingProtection>
+UrlClassifierFeatureSocialTrackingProtection::MaybeCreate(
+    nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureSocialTrackingProtection::MaybeCreate - channel %p",
+       aChannel));
+
+  if (!StaticPrefs::privacy_trackingprotection_socialtracking_enabled()) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+  if (!isThirdParty) {
+    UC_LOG(
+        ("UrlClassifierFeatureSocialTrackingProtection::MaybeCreate - "
+         "skipping first party or top-level load for channel %p",
+         aChannel));
+    return nullptr;
+  }
+
+  if (!UrlClassifierCommon::ShouldEnableProtectionForChannel(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureSocialTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureSocialTrackingProtection> self =
+      gFeatureSocialTrackingProtection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureSocialTrackingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(SOCIALTRACKING_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureSocialTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureSocialTrackingProtection> self =
+      gFeatureSocialTrackingProtection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureSocialTrackingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
+
+  // This is a blocking feature.
+  *aShouldContinue = isAllowListed;
+
+  if (isAllowListed) {
+    return NS_OK;
+  }
+
+  nsAutoCString list;
+  UrlClassifierCommon::TablesToString(aList, list);
+
+  ChannelBlockDecision decision =
+      ChannelClassifierService::OnBeforeBlockChannel(aChannel, mName, list);
+  if (decision != ChannelBlockDecision::Blocked) {
+    uint32_t event =
+        decision == ChannelBlockDecision::Replaced
+            ? nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT
+            : nsIWebProgressListener::STATE_ALLOWED_TRACKING_CONTENT;
+
+    // Need to set aBlocked to True if we replace the Social Tracker
+    //  with a shim, since the shim is treated as a blocked event
+    // Note: If we need to account for which kind of tracker was replaced,
+    //  we need to create a new event type in nsIWebProgressListener
+    if (event == nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT) {
+      ContentBlockingNotifier::OnEvent(aChannel, event, true);
+    } else {
+      ContentBlockingNotifier::OnEvent(aChannel, event, false);
+    }
+
+    *aShouldContinue = true;
+    return NS_OK;
+  }
+
+  UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_SOCIALTRACKING_URI,
+                                         list, ""_ns, ""_ns);
+
+  UC_LOG(
+      ("UrlClassifierFeatureSocialTrackingProtection::ProcessChannel - "
+       "cancelling channel %p",
+       aChannel));
+  nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
+
+  if (httpChannel) {
+    Unused << httpChannel->CancelByURLClassifier(NS_ERROR_SOCIALTRACKING_URI);
+  } else {
+    Unused << aChannel->Cancel(NS_ERROR_SOCIALTRACKING_URI);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureSocialTrackingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.h b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.h
new file mode 100644
index 0000000000..50ec2d0dfe
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureSocialTrackingProtection.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureSocialTrackingProtection_h
+#define mozilla_net_UrlClassifierFeatureSocialTrackingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureSocialTrackingProtection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureSocialTrackingProtection>
+  MaybeCreate(nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureSocialTrackingProtection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureSocialTrackingProtection_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.cpp b/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.cpp
new file mode 100644
index 0000000000..518bde65ef
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.cpp
@@ -0,0 +1,180 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureTrackingAnnotation.h"
+
+#include "Classifier.h"
+#include "mozilla/Logging.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "nsIChannel.h"
+#include "nsIClassifiedChannel.h"
+#include "nsIWebProgressListener.h"
+#include "nsContentUtils.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define TRACKING_ANNOTATION_FEATURE_NAME "tracking-annotation"
+
+#define URLCLASSIFIER_ANNOTATION_BLOCKLIST \
+  "urlclassifier.trackingAnnotationTable"
+#define URLCLASSIFIER_ANNOTATION_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.trackingAnnotationTable.testEntries"
+#define URLCLASSIFIER_ANNOTATION_ENTITYLIST \
+  "urlclassifier.trackingAnnotationWhitelistTable"
+#define URLCLASSIFIER_ANNOTATION_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.trackingAnnotationWhitelistTable.testEntries"
+#define URLCLASSIFIER_TRACKING_ANNOTATION_EXCEPTION_URLS \
+  "urlclassifier.trackingAnnotationSkipURLs"
+#define TABLE_ANNOTATION_BLOCKLIST_PREF "annotation-blacklist-pref"
+#define TABLE_ANNOTATION_ENTITYLIST_PREF "annotation-whitelist-pref"
+
+StaticRefPtr<UrlClassifierFeatureTrackingAnnotation> gFeatureTrackingAnnotation;
+
+}  // namespace
+
+UrlClassifierFeatureTrackingAnnotation::UrlClassifierFeatureTrackingAnnotation()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(TRACKING_ANNOTATION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_ANNOTATION_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_ANNOTATION_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_ANNOTATION_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(URLCLASSIFIER_ANNOTATION_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_ANNOTATION_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_ANNOTATION_ENTITYLIST_PREF),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_ANNOTATION_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureTrackingAnnotation::Name() {
+  return TRACKING_ANNOTATION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureTrackingAnnotation::MaybeInitialize() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  UC_LOG_LEAK(("UrlClassifierFeatureTrackingAnnotation::MaybeInitialize"));
+
+  if (!gFeatureTrackingAnnotation) {
+    gFeatureTrackingAnnotation = new UrlClassifierFeatureTrackingAnnotation();
+    gFeatureTrackingAnnotation->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureTrackingAnnotation::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureTrackingAnnotation::MaybeShutdown"));
+
+  if (gFeatureTrackingAnnotation) {
+    gFeatureTrackingAnnotation->ShutdownPreferences();
+    gFeatureTrackingAnnotation = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureTrackingAnnotation>
+UrlClassifierFeatureTrackingAnnotation::MaybeCreate(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureTrackingAnnotation::MaybeCreate - channel %p",
+       aChannel));
+
+  if (!StaticPrefs::privacy_trackingprotection_annotate_channels()) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureTrackingAnnotation);
+
+  RefPtr<UrlClassifierFeatureTrackingAnnotation> self =
+      gFeatureTrackingAnnotation;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureTrackingAnnotation::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(TRACKING_ANNOTATION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureTrackingAnnotation);
+
+  RefPtr<UrlClassifierFeatureTrackingAnnotation> self =
+      gFeatureTrackingAnnotation;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureTrackingAnnotation::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  // This is not a blocking feature.
+  *aShouldContinue = true;
+
+  UC_LOG(
+      ("UrlClassifierFeatureTrackingAnnotation::ProcessChannel - "
+       "annotating channel %p",
+       aChannel));
+
+  static std::vector<UrlClassifierCommon::ClassificationData>
+      sClassificationData = {
+          {"ads-track-"_ns,
+           nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_TRACKING_AD},
+          {"analytics-track-"_ns, nsIClassifiedChannel::ClassificationFlags::
+                                      CLASSIFIED_TRACKING_ANALYTICS},
+          {"social-track-"_ns, nsIClassifiedChannel::ClassificationFlags::
+                                   CLASSIFIED_TRACKING_SOCIAL},
+          {"content-track-"_ns, nsIClassifiedChannel::ClassificationFlags::
+                                    CLASSIFIED_TRACKING_CONTENT},
+      };
+
+  uint32_t flags = UrlClassifierCommon::TablesToClassificationFlags(
+      aList, sClassificationData,
+      nsIClassifiedChannel::ClassificationFlags::CLASSIFIED_TRACKING);
+
+  UrlClassifierCommon::SetTrackingInfo(aChannel, aList, aHashes);
+
+  uint32_t notification =
+      ((flags & nsIClassifiedChannel::ClassificationFlags::
+                    CLASSIFIED_TRACKING_CONTENT) != 0)
+          ? nsIWebProgressListener::STATE_LOADED_LEVEL_2_TRACKING_CONTENT
+          : nsIWebProgressListener::STATE_LOADED_LEVEL_1_TRACKING_CONTENT;
+
+  UrlClassifierCommon::AnnotateChannel(aChannel, flags, notification);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureTrackingAnnotation::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.h b/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.h
new file mode 100644
index 0000000000..5be6cf0765
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureTrackingAnnotation.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureTrackingAnnotation_h
+#define mozilla_net_UrlClassifierFeatureTrackingAnnotation_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureTrackingAnnotation final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureTrackingAnnotation> MaybeCreate(
+      nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureTrackingAnnotation();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureTrackingAnnotation_h
diff --git a/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.cpp b/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.cpp
new file mode 100644
index 0000000000..8c50b33d4d
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.cpp
@@ -0,0 +1,217 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "UrlClassifierFeatureTrackingProtection.h"
+
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "ChannelClassifierService.h"
+#include "nsIChannel.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsILoadContext.h"
+#include "nsNetUtil.h"
+#include "mozilla/StaticPtr.h"
+#include "nsXULAppAPI.h"
+#include "nsIWebProgressListener.h"
+
+namespace mozilla {
+namespace net {
+
+namespace {
+
+#define TRACKING_PROTECTION_FEATURE_NAME "tracking-protection"
+
+#define URLCLASSIFIER_TRACKING_BLOCKLIST "urlclassifier.trackingTable"
+#define URLCLASSIFIER_TRACKING_BLOCKLIST_TEST_ENTRIES \
+  "urlclassifier.trackingTable.testEntries"
+#define URLCLASSIFIER_TRACKING_ENTITYLIST "urlclassifier.trackingWhitelistTable"
+#define URLCLASSIFIER_TRACKING_ENTITYLIST_TEST_ENTRIES \
+  "urlclassifier.trackingWhitelistTable.testEntries"
+#define URLCLASSIFIER_TRACKING_PROTECTION_EXCEPTION_URLS \
+  "urlclassifier.trackingSkipURLs"
+#define TABLE_TRACKING_BLOCKLIST_PREF "tracking-blocklist-pref"
+#define TABLE_TRACKING_ENTITYLIST_PREF "tracking-entitylist-pref"
+
+StaticRefPtr<UrlClassifierFeatureTrackingProtection> gFeatureTrackingProtection;
+
+}  // namespace
+
+UrlClassifierFeatureTrackingProtection::UrlClassifierFeatureTrackingProtection()
+    : UrlClassifierFeatureAntiTrackingBase(
+          nsLiteralCString(TRACKING_PROTECTION_FEATURE_NAME),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_BLOCKLIST),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_ENTITYLIST),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_BLOCKLIST_TEST_ENTRIES),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_ENTITYLIST_TEST_ENTRIES),
+          nsLiteralCString(TABLE_TRACKING_BLOCKLIST_PREF),
+          nsLiteralCString(TABLE_TRACKING_ENTITYLIST_PREF),
+          nsLiteralCString(URLCLASSIFIER_TRACKING_PROTECTION_EXCEPTION_URLS)) {}
+
+/* static */ const char* UrlClassifierFeatureTrackingProtection::Name() {
+  return TRACKING_PROTECTION_FEATURE_NAME;
+}
+
+/* static */
+void UrlClassifierFeatureTrackingProtection::MaybeInitialize() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  UC_LOG_LEAK(("UrlClassifierFeatureTrackingProtection::MaybeInitialize"));
+
+  if (!gFeatureTrackingProtection) {
+    gFeatureTrackingProtection = new UrlClassifierFeatureTrackingProtection();
+    gFeatureTrackingProtection->InitializePreferences();
+  }
+}
+
+/* static */
+void UrlClassifierFeatureTrackingProtection::MaybeShutdown() {
+  UC_LOG_LEAK(("UrlClassifierFeatureTrackingProtection::MaybeShutdown"));
+
+  if (gFeatureTrackingProtection) {
+    gFeatureTrackingProtection->ShutdownPreferences();
+    gFeatureTrackingProtection = nullptr;
+  }
+}
+
+/* static */
+already_AddRefed<UrlClassifierFeatureTrackingProtection>
+UrlClassifierFeatureTrackingProtection::MaybeCreate(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  UC_LOG_LEAK(
+      ("UrlClassifierFeatureTrackingProtection::MaybeCreate - channel %p",
+       aChannel));
+
+  nsCOMPtr<nsILoadContext> loadContext;
+  NS_QueryNotificationCallbacks(aChannel, loadContext);
+  if (!loadContext) {
+    // Some channels don't have a loadcontext, check the global tracking
+    // protection preference.
+    if (!StaticPrefs::privacy_trackingprotection_enabled() &&
+        !(NS_UsePrivateBrowsing(aChannel) &&
+          StaticPrefs::privacy_trackingprotection_pbmode_enabled())) {
+      return nullptr;
+    }
+  } else if (!loadContext->UseTrackingProtection()) {
+    return nullptr;
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(aChannel);
+  if (!isThirdParty) {
+    UC_LOG(
+        ("UrlClassifierFeatureTrackingProtection::MaybeCreate - "
+         "skipping first party or top-level load for channel %p",
+         aChannel));
+    return nullptr;
+  }
+
+  if (!UrlClassifierCommon::ShouldEnableProtectionForChannel(aChannel)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureTrackingProtection> self =
+      gFeatureTrackingProtection;
+  return self.forget();
+}
+
+/* static */
+already_AddRefed<nsIUrlClassifierFeature>
+UrlClassifierFeatureTrackingProtection::GetIfNameMatches(
+    const nsACString& aName) {
+  if (!aName.EqualsLiteral(TRACKING_PROTECTION_FEATURE_NAME)) {
+    return nullptr;
+  }
+
+  MaybeInitialize();
+  MOZ_ASSERT(gFeatureTrackingProtection);
+
+  RefPtr<UrlClassifierFeatureTrackingProtection> self =
+      gFeatureTrackingProtection;
+  return self.forget();
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureTrackingProtection::ProcessChannel(
+    nsIChannel* aChannel, const nsTArray<nsCString>& aList,
+    const nsTArray<nsCString>& aHashes, bool* aShouldContinue) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aShouldContinue);
+
+  bool isAllowListed = UrlClassifierCommon::IsAllowListed(aChannel);
+
+  // This is a blocking feature.
+  *aShouldContinue = isAllowListed;
+
+  if (isAllowListed) {
+    return NS_OK;
+  }
+
+  nsAutoCString list;
+  UrlClassifierCommon::TablesToString(aList, list);
+
+  ChannelBlockDecision decision =
+      ChannelClassifierService::OnBeforeBlockChannel(aChannel, mName, list);
+  if (decision != ChannelBlockDecision::Blocked) {
+    uint32_t event =
+        decision == ChannelBlockDecision::Replaced
+            ? nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT
+            : nsIWebProgressListener::STATE_ALLOWED_TRACKING_CONTENT;
+
+    // Need to set aBlocked to True if we replace the Tracker with a shim,
+    //  since the shim is treated as a blocked event
+    // Note: If we need to account for which kind of tracker was replaced,
+    //  we need to create a new event type in nsIWebProgressListener
+    if (event == nsIWebProgressListener::STATE_REPLACED_TRACKING_CONTENT) {
+      ContentBlockingNotifier::OnEvent(aChannel, event, true);
+    } else {
+      ContentBlockingNotifier::OnEvent(aChannel, event, false);
+    }
+
+    *aShouldContinue = true;
+    return NS_OK;
+  }
+
+  UrlClassifierCommon::SetBlockedContent(aChannel, NS_ERROR_TRACKING_URI, list,
+                                         ""_ns, ""_ns);
+
+  UC_LOG(
+      ("UrlClassifierFeatureTrackingProtection::ProcessChannel - "
+       "cancelling channel %p",
+       aChannel));
+
+  nsCOMPtr<nsIHttpChannelInternal> httpChannel = do_QueryInterface(aChannel);
+  if (httpChannel) {
+    Unused << httpChannel->CancelByURLClassifier(NS_ERROR_TRACKING_URI);
+  } else {
+    Unused << aChannel->Cancel(NS_ERROR_TRACKING_URI);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+UrlClassifierFeatureTrackingProtection::GetURIByListType(
+    nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
+    nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+  NS_ENSURE_ARG_POINTER(aURIType);
+  NS_ENSURE_ARG_POINTER(aURI);
+
+  if (aListType == nsIUrlClassifierFeature::blocklist) {
+    *aURIType = nsIUrlClassifierFeature::blocklistURI;
+    return aChannel->GetURI(aURI);
+  }
+
+  MOZ_ASSERT(aListType == nsIUrlClassifierFeature::entitylist);
+
+  *aURIType = nsIUrlClassifierFeature::pairwiseEntitylistURI;
+  return UrlClassifierCommon::CreatePairwiseEntityListURI(aChannel, aURI);
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.h b/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.h
new file mode 100644
index 0000000000..23abfe1fd9
--- /dev/null
+++ b/netwerk/url-classifier/UrlClassifierFeatureTrackingProtection.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_net_UrlClassifierFeatureTrackingProtection_h
+#define mozilla_net_UrlClassifierFeatureTrackingProtection_h
+
+#include "UrlClassifierFeatureBase.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class UrlClassifierFeatureTrackingProtection final
+    : public UrlClassifierFeatureAntiTrackingBase {
+ public:
+  static const char* Name();
+
+  static void MaybeShutdown();
+
+  static already_AddRefed<UrlClassifierFeatureTrackingProtection> MaybeCreate(
+      nsIChannel* aChannel);
+
+  static already_AddRefed<nsIUrlClassifierFeature> GetIfNameMatches(
+      const nsACString& aName);
+
+  NS_IMETHOD ProcessChannel(nsIChannel* aChannel,
+                            const nsTArray<nsCString>& aList,
+                            const nsTArray<nsCString>& aHashes,
+                            bool* aShouldContinue) override;
+
+  NS_IMETHOD GetURIByListType(nsIChannel* aChannel,
+                              nsIUrlClassifierFeature::listType aListType,
+                              nsIUrlClassifierFeature::URIType* aURIType,
+                              nsIURI** aURI) override;
+
+ private:
+  UrlClassifierFeatureTrackingProtection();
+
+  static void MaybeInitialize();
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_UrlClassifierFeatureTrackingProtection_h
diff --git a/netwerk/url-classifier/components.conf b/netwerk/url-classifier/components.conf
new file mode 100644
index 0000000000..3cf63a06f1
--- /dev/null
+++ b/netwerk/url-classifier/components.conf
@@ -0,0 +1,22 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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 http://mozilla.org/MPL/2.0/.
+
+Classes = [
+     {
+        'cid': '{7a6da992-dbce-4943-b463-5a2dd011fa1a}',
+        'contract_ids': ['@mozilla.org/url-classifier/channel-classifier-service;1'],
+        'singleton': True,
+        'type': 'nsIChannelClassifierService',
+        'constructor': 'mozilla::net::ChannelClassifierService::GetSingleton',
+        'headers': ['mozilla/net/ChannelClassifierService.h'],
+    },
+    {
+        'cid': '{b9f4fd03-9d87-4bfd-9958-85a821750ddc}',
+        'contract_ids': ['@mozilla.org/url-classifier/exception-list-service;1'],
+        'esModule': 'resource://gre/modules/UrlClassifierExceptionListService.sys.mjs',
+        'constructor': 'UrlClassifierExceptionListService',
+    },
+]
diff --git a/netwerk/url-classifier/moz.build b/netwerk/url-classifier/moz.build
new file mode 100644
index 0000000000..69ec65f200
--- /dev/null
+++ b/netwerk/url-classifier/moz.build
@@ -0,0 +1,69 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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 http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Toolkit", "Safe Browsing")
+
+XPIDL_SOURCES += [
+    "nsIChannelClassifierService.idl",
+    "nsIURIClassifier.idl",
+    "nsIUrlClassifierExceptionListService.idl",
+    "nsIUrlClassifierFeature.idl",
+]
+
+XPIDL_MODULE = "url-classifier"
+
+EXTRA_JS_MODULES += [
+    "UrlClassifierExceptionListService.sys.mjs",
+]
+
+XPCOM_MANIFESTS += [
+    "components.conf",
+]
+
+DEFINES["GOOGLE_PROTOBUF_NO_RTTI"] = True
+DEFINES["GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER"] = True
+
+UNIFIED_SOURCES += [
+    "AsyncUrlChannelClassifier.cpp",
+    "ChannelClassifierService.cpp",
+    "nsChannelClassifier.cpp",
+    "UrlClassifierCommon.cpp",
+    "UrlClassifierFeatureBase.cpp",
+    "UrlClassifierFeatureCryptominingAnnotation.cpp",
+    "UrlClassifierFeatureCryptominingProtection.cpp",
+    "UrlClassifierFeatureCustomTables.cpp",
+    "UrlClassifierFeatureEmailTrackingDataCollection.cpp",
+    "UrlClassifierFeatureEmailTrackingProtection.cpp",
+    "UrlClassifierFeatureFactory.cpp",
+    "UrlClassifierFeatureFingerprintingAnnotation.cpp",
+    "UrlClassifierFeatureFingerprintingProtection.cpp",
+    "UrlClassifierFeatureLoginReputation.cpp",
+    "UrlClassifierFeaturePhishingProtection.cpp",
+    "UrlClassifierFeatureResult.cpp",
+    "UrlClassifierFeatureSocialTrackingAnnotation.cpp",
+    "UrlClassifierFeatureSocialTrackingProtection.cpp",
+    "UrlClassifierFeatureTrackingAnnotation.cpp",
+    "UrlClassifierFeatureTrackingProtection.cpp",
+]
+
+EXPORTS.mozilla.net += [
+    "AsyncUrlChannelClassifier.h",
+    "ChannelClassifierService.h",
+    "UrlClassifierCommon.h",
+    "UrlClassifierFeatureFactory.h",
+    "UrlClassifierFeatureResult.h",
+]
+
+LOCAL_INCLUDES += [
+    "/netwerk/base",
+    "/netwerk/protocol/http",
+    "/toolkit/components/url-classifier",
+]
+
+FINAL_LIBRARY = "xul"
+
+include("/ipc/chromium/chromium-config.mozbuild")
diff --git a/netwerk/url-classifier/nsChannelClassifier.cpp b/netwerk/url-classifier/nsChannelClassifier.cpp
new file mode 100644
index 0000000000..b9bdb3a050
--- /dev/null
+++ b/netwerk/url-classifier/nsChannelClassifier.cpp
@@ -0,0 +1,483 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 sts=2 ts=8 et tw=80 : */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "nsChannelClassifier.h"
+
+#include "nsCharSeparatedTokenizer.h"
+#include "nsICacheEntry.h"
+#include "nsICachingChannel.h"
+#include "nsIChannel.h"
+#include "nsIObserverService.h"
+#include "nsIProtocolHandler.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsNetUtil.h"
+#include "nsXULAppAPI.h"
+#include "nsQueryObject.h"
+#include "nsPrintfCString.h"
+
+#include "mozilla/Components.h"
+#include "mozilla/ErrorNames.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/net/UrlClassifierCommon.h"
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/Services.h"
+
+namespace mozilla {
+namespace net {
+
+#define URLCLASSIFIER_EXCEPTION_HOSTNAMES "urlclassifier.skipHostnames"
+
+// Put CachedPrefs in anonymous namespace to avoid any collision from outside of
+// this file.
+namespace {
+
+/**
+ * It is not recommended to read from Preference everytime a channel is
+ * connected.
+ * That is not fast and we should cache preference values and reuse them
+ */
+class CachedPrefs final {
+ public:
+  static CachedPrefs* GetInstance();
+
+  void Init();
+
+  nsCString GetExceptionHostnames() const { return mExceptionHostnames; }
+  void SetExceptionHostnames(const nsACString& aHostnames) {
+    mExceptionHostnames = aHostnames;
+  }
+
+ private:
+  friend class StaticAutoPtr<CachedPrefs>;
+  CachedPrefs();
+  ~CachedPrefs();
+
+  static void OnPrefsChange(const char* aPrefName, void*);
+
+  nsCString mExceptionHostnames;
+
+  static StaticAutoPtr<CachedPrefs> sInstance;
+};
+
+StaticAutoPtr<CachedPrefs> CachedPrefs::sInstance;
+
+// static
+void CachedPrefs::OnPrefsChange(const char* aPref, void* aPrefs) {
+  auto* prefs = static_cast<CachedPrefs*>(aPrefs);
+
+  if (!strcmp(aPref, URLCLASSIFIER_EXCEPTION_HOSTNAMES)) {
+    nsCString exceptionHostnames;
+    Preferences::GetCString(URLCLASSIFIER_EXCEPTION_HOSTNAMES,
+                            exceptionHostnames);
+    ToLowerCase(exceptionHostnames);
+    prefs->SetExceptionHostnames(exceptionHostnames);
+  }
+}
+
+void CachedPrefs::Init() {
+  Preferences::RegisterCallbackAndCall(CachedPrefs::OnPrefsChange,
+                                       URLCLASSIFIER_EXCEPTION_HOSTNAMES, this);
+}
+
+// static
+CachedPrefs* CachedPrefs::GetInstance() {
+  if (!sInstance) {
+    sInstance = new CachedPrefs();
+    sInstance->Init();
+    ClearOnShutdown(&sInstance);
+  }
+  MOZ_ASSERT(sInstance);
+  return sInstance;
+}
+
+CachedPrefs::CachedPrefs() { MOZ_COUNT_CTOR(CachedPrefs); }
+
+CachedPrefs::~CachedPrefs() {
+  MOZ_COUNT_DTOR(CachedPrefs);
+
+  Preferences::UnregisterCallback(CachedPrefs::OnPrefsChange,
+                                  URLCLASSIFIER_EXCEPTION_HOSTNAMES, this);
+}
+
+}  // anonymous namespace
+
+NS_IMPL_ISUPPORTS(nsChannelClassifier, nsIURIClassifierCallback, nsIObserver)
+
+nsChannelClassifier::nsChannelClassifier(nsIChannel* aChannel)
+    : mIsAllowListed(false), mSuspendedChannel(false), mChannel(aChannel) {
+  UC_LOG_LEAK(("nsChannelClassifier::nsChannelClassifier [this=%p]", this));
+  MOZ_ASSERT(mChannel);
+}
+
+nsChannelClassifier::~nsChannelClassifier() {
+  UC_LOG_LEAK(("nsChannelClassifier::~nsChannelClassifier [this=%p]", this));
+}
+
+void nsChannelClassifier::Start() {
+  nsresult rv = StartInternal();
+  if (NS_FAILED(rv)) {
+    // If we aren't getting a callback for any reason, assume a good verdict and
+    // make sure we resume the channel if necessary.
+    OnClassifyComplete(NS_OK, ""_ns, ""_ns, ""_ns);
+  }
+}
+
+nsresult nsChannelClassifier::StartInternal() {
+  // Should only be called in the parent process.
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  // Don't bother to run the classifier on a load that has already failed.
+  // (this might happen after a redirect)
+  nsresult status;
+  mChannel->GetStatus(&status);
+  if (NS_FAILED(status)) return status;
+
+  // Don't bother to run the classifier on a cached load that was
+  // previously classified as good.
+  if (HasBeenClassified(mChannel)) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = mChannel->GetURI(getter_AddRefs(uri));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Don't bother checking certain types of URIs.
+  if (uri->SchemeIs("about")) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  bool hasFlags;
+  rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_DANGEROUS_TO_LOAD,
+                           &hasFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (hasFlags) return NS_ERROR_UNEXPECTED;
+
+  rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_IS_LOCAL_FILE,
+                           &hasFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (hasFlags) return NS_ERROR_UNEXPECTED;
+
+  rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_IS_UI_RESOURCE,
+                           &hasFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (hasFlags) return NS_ERROR_UNEXPECTED;
+
+  rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_IS_LOCAL_RESOURCE,
+                           &hasFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (hasFlags) return NS_ERROR_UNEXPECTED;
+
+  nsCString exceptionHostnames =
+      CachedPrefs::GetInstance()->GetExceptionHostnames();
+  if (!exceptionHostnames.IsEmpty()) {
+    UC_LOG(
+        ("nsChannelClassifier::StartInternal - entitylisted hostnames = %s "
+         "[this=%p]",
+         exceptionHostnames.get(), this));
+    if (IsHostnameEntitylisted(uri, exceptionHostnames)) {
+      return NS_ERROR_UNEXPECTED;
+    }
+  }
+
+  nsCOMPtr<nsIURIClassifier> uriClassifier =
+      do_GetService(NS_URICLASSIFIERSERVICE_CONTRACTID, &rv);
+  if (rv == NS_ERROR_FACTORY_NOT_REGISTERED || rv == NS_ERROR_NOT_AVAILABLE) {
+    // no URI classifier, ignore this failure.
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIScriptSecurityManager> securityManager =
+      do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIPrincipal> principal;
+  rv = securityManager->GetChannelURIPrincipal(mChannel,
+                                               getter_AddRefs(principal));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  bool expectCallback;
+  if (UC_LOG_ENABLED()) {
+    nsCOMPtr<nsIURI> principalURI;
+    nsCString spec;
+    principal->GetAsciiSpec(spec);
+    spec.Truncate(std::min(spec.Length(), UrlClassifierCommon::sMaxSpecLength));
+    UC_LOG(
+        ("nsChannelClassifier::StartInternal - classifying principal %s on "
+         "channel %p [this=%p]",
+         spec.get(), mChannel.get(), this));
+  }
+  // The classify is running in parent process, no need to give a valid event
+  // target
+  rv = uriClassifier->Classify(principal, this, &expectCallback);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  if (expectCallback) {
+    // Suspend the channel, it will be resumed when we get the classifier
+    // callback.
+    rv = mChannel->Suspend();
+    if (NS_FAILED(rv)) {
+      // Some channels (including nsJSChannel) fail on Suspend.  This
+      // shouldn't be fatal, but will prevent malware from being
+      // blocked on these channels.
+      UC_LOG_WARN(
+          ("nsChannelClassifier::StartInternal - couldn't suspend channel "
+           "[this=%p]",
+           this));
+      return rv;
+    }
+
+    mSuspendedChannel = true;
+    UC_LOG(
+        ("nsChannelClassifier::StartInternal - suspended channel %p [this=%p]",
+         mChannel.get(), this));
+  } else {
+    UC_LOG_WARN((
+        "nsChannelClassifier::StartInternal - not expecting callback [this=%p]",
+        this));
+    return NS_ERROR_FAILURE;
+  }
+
+  // Add an observer for shutdown
+  AddShutdownObserver();
+  return NS_OK;
+}
+
+bool nsChannelClassifier::IsHostnameEntitylisted(
+    nsIURI* aUri, const nsACString& aEntitylisted) {
+  nsAutoCString host;
+  nsresult rv = aUri->GetHost(host);
+  if (NS_FAILED(rv) || host.IsEmpty()) {
+    return false;
+  }
+  ToLowerCase(host);
+
+  for (const nsACString& token :
+       nsCCharSeparatedTokenizer(aEntitylisted, ',').ToRange()) {
+    if (token.Equals(host)) {
+      UC_LOG(
+          ("nsChannelClassifier::StartInternal - skipping %s (entitylisted) "
+           "[this=%p]",
+           host.get(), this));
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// Note in the cache entry that this URL was classified, so that future
+// cached loads don't need to be checked.
+void nsChannelClassifier::MarkEntryClassified(nsresult status) {
+  // Should only be called in the parent process.
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  // Don't cache tracking classifications because we support allowlisting.
+  if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(status) ||
+      mIsAllowListed) {
+    return;
+  }
+
+  if (UC_LOG_ENABLED()) {
+    nsAutoCString errorName;
+    GetErrorName(status, errorName);
+    nsCOMPtr<nsIURI> uri;
+    mChannel->GetURI(getter_AddRefs(uri));
+    nsAutoCString spec;
+    uri->GetAsciiSpec(spec);
+    spec.Truncate(std::min(spec.Length(), UrlClassifierCommon::sMaxSpecLength));
+    UC_LOG(
+        ("nsChannelClassifier::MarkEntryClassified - result is %s "
+         "for uri %s [this=%p, channel=%p]",
+         errorName.get(), spec.get(), this, mChannel.get()));
+  }
+
+  nsCOMPtr<nsICachingChannel> cachingChannel = do_QueryInterface(mChannel);
+  if (!cachingChannel) {
+    return;
+  }
+
+  nsCOMPtr<nsISupports> cacheToken;
+  cachingChannel->GetCacheToken(getter_AddRefs(cacheToken));
+  if (!cacheToken) {
+    return;
+  }
+
+  nsCOMPtr<nsICacheEntry> cacheEntry = do_QueryInterface(cacheToken);
+  if (!cacheEntry) {
+    return;
+  }
+
+  cacheEntry->SetMetaDataElement("necko:classified",
+                                 NS_SUCCEEDED(status) ? "1" : nullptr);
+}
+
+bool nsChannelClassifier::HasBeenClassified(nsIChannel* aChannel) {
+  // Should only be called in the parent process.
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsCOMPtr<nsICachingChannel> cachingChannel = do_QueryInterface(aChannel);
+  if (!cachingChannel) {
+    return false;
+  }
+
+  // Only check the tag if we are loading from the cache without
+  // validation.
+  bool fromCache;
+  if (NS_FAILED(cachingChannel->IsFromCache(&fromCache)) || !fromCache) {
+    return false;
+  }
+
+  nsCOMPtr<nsISupports> cacheToken;
+  cachingChannel->GetCacheToken(getter_AddRefs(cacheToken));
+  if (!cacheToken) {
+    return false;
+  }
+
+  nsCOMPtr<nsICacheEntry> cacheEntry = do_QueryInterface(cacheToken);
+  if (!cacheEntry) {
+    return false;
+  }
+
+  nsCString tag;
+  cacheEntry->GetMetaDataElement("necko:classified", getter_Copies(tag));
+  return tag.EqualsLiteral("1");
+}
+
+/* static */
+nsresult nsChannelClassifier::SendThreatHitReport(nsIChannel* aChannel,
+                                                  const nsACString& aProvider,
+                                                  const nsACString& aList,
+                                                  const nsACString& aFullHash) {
+  NS_ENSURE_ARG_POINTER(aChannel);
+
+  nsAutoCString provider(aProvider);
+  nsPrintfCString reportEnablePref(
+      "browser.safebrowsing.provider.%s.dataSharing.enabled", provider.get());
+  if (!Preferences::GetBool(reportEnablePref.get(), false)) {
+    UC_LOG(
+        ("nsChannelClassifier::SendThreatHitReport - data sharing disabled for "
+         "%s",
+         provider.get()));
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIURIClassifier> uriClassifier =
+      components::UrlClassifierDB::Service();
+  if (!uriClassifier) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsresult rv =
+      uriClassifier->SendThreatHitReport(aChannel, aProvider, aList, aFullHash);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsChannelClassifier::OnClassifyComplete(nsresult aErrorCode,
+                                        const nsACString& aList,
+                                        const nsACString& aProvider,
+                                        const nsACString& aFullHash) {
+  // Should only be called in the parent process.
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(
+      !UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode));
+
+  if (mSuspendedChannel) {
+    MarkEntryClassified(aErrorCode);
+
+    if (NS_FAILED(aErrorCode)) {
+      if (UC_LOG_ENABLED()) {
+        nsAutoCString errorName;
+        GetErrorName(aErrorCode, errorName);
+
+        nsCOMPtr<nsIURI> uri;
+        mChannel->GetURI(getter_AddRefs(uri));
+        nsCString spec = uri->GetSpecOrDefault();
+        spec.Truncate(
+            std::min(spec.Length(), UrlClassifierCommon::sMaxSpecLength));
+        UC_LOG(
+            ("nsChannelClassifier::OnClassifyComplete - cancelling channel %p "
+             "for %s "
+             "with error code %s [this=%p]",
+             mChannel.get(), spec.get(), errorName.get(), this));
+      }
+
+      // Channel will be cancelled (page element blocked) due to Safe Browsing.
+      // Do update the security state of the document and fire a security
+      // change event.
+      UrlClassifierCommon::SetBlockedContent(mChannel, aErrorCode, aList,
+                                             aProvider, aFullHash);
+
+      if (aErrorCode == NS_ERROR_MALWARE_URI ||
+          aErrorCode == NS_ERROR_PHISHING_URI ||
+          aErrorCode == NS_ERROR_UNWANTED_URI ||
+          aErrorCode == NS_ERROR_HARMFUL_URI) {
+        SendThreatHitReport(mChannel, aProvider, aList, aFullHash);
+      }
+
+      mChannel->Cancel(aErrorCode);
+    }
+    UC_LOG(
+        ("nsChannelClassifier::OnClassifyComplete - resuming channel %p "
+         "[this=%p]",
+         mChannel.get(), this));
+    mChannel->Resume();
+  }
+
+  mChannel = nullptr;
+  RemoveShutdownObserver();
+
+  return NS_OK;
+}
+
+void nsChannelClassifier::AddShutdownObserver() {
+  nsCOMPtr<nsIObserverService> observerService =
+      mozilla::services::GetObserverService();
+  if (observerService) {
+    observerService->AddObserver(this, "profile-change-net-teardown", false);
+  }
+}
+
+void nsChannelClassifier::RemoveShutdownObserver() {
+  nsCOMPtr<nsIObserverService> observerService =
+      mozilla::services::GetObserverService();
+  if (observerService) {
+    observerService->RemoveObserver(this, "profile-change-net-teardown");
+  }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// nsIObserver implementation
+NS_IMETHODIMP
+nsChannelClassifier::Observe(nsISupports* aSubject, const char* aTopic,
+                             const char16_t* aData) {
+  if (!strcmp(aTopic, "profile-change-net-teardown")) {
+    // If we aren't getting a callback for any reason, make sure
+    // we resume the channel.
+
+    if (mChannel && mSuspendedChannel) {
+      mSuspendedChannel = false;
+      mChannel->Cancel(NS_ERROR_ABORT);
+      mChannel->Resume();
+      mChannel = nullptr;
+    }
+
+    RemoveShutdownObserver();
+  }
+
+  return NS_OK;
+}
+
+}  // namespace net
+}  // namespace mozilla
diff --git a/netwerk/url-classifier/nsChannelClassifier.h b/netwerk/url-classifier/nsChannelClassifier.h
new file mode 100644
index 0000000000..ddd89e2976
--- /dev/null
+++ b/netwerk/url-classifier/nsChannelClassifier.h
@@ -0,0 +1,70 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsChannelClassifier_h__
+#define nsChannelClassifier_h__
+
+#include "nsIObserver.h"
+#include "nsIURIClassifier.h"
+#include "nsCOMPtr.h"
+#include "mozilla/Attributes.h"
+
+#include <functional>
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+class nsChannelClassifier final : public nsIURIClassifierCallback,
+                                  public nsIObserver {
+ public:
+  explicit nsChannelClassifier(nsIChannel* aChannel);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIURICLASSIFIERCALLBACK
+  NS_DECL_NSIOBSERVER
+
+  // Calls nsIURIClassifier.Classify with the principal of the given channel,
+  // and cancels the channel on a bad verdict.
+  void Start();
+
+ private:
+  // True if the channel is on the allow list.
+  bool mIsAllowListed;
+  // True if the channel has been suspended.
+  bool mSuspendedChannel;
+  nsCOMPtr<nsIChannel> mChannel;
+
+  ~nsChannelClassifier();
+  // Caches good classifications for the channel principal.
+  void MarkEntryClassified(nsresult status);
+  bool HasBeenClassified(nsIChannel* aChannel);
+  // Helper function so that we ensure we call ContinueBeginConnect once
+  // Start is called. Returns NS_OK if and only if we will get a callback
+  // from the classifier service.
+  nsresult StartInternal();
+  // Helper function to check a URI against the hostname entitylist
+  bool IsHostnameEntitylisted(nsIURI* aUri, const nsACString& aEntitylisted);
+
+  void AddShutdownObserver();
+  void RemoveShutdownObserver();
+  static nsresult SendThreatHitReport(nsIChannel* aChannel,
+                                      const nsACString& aProvider,
+                                      const nsACString& aList,
+                                      const nsACString& aFullHash);
+
+ public:
+  // If we are blocking content, update the corresponding flag in the respective
+  // docshell and call nsDocLoader::OnSecurityChange.
+  static nsresult SetBlockedContent(nsIChannel* channel, nsresult aErrorCode,
+                                    const nsACString& aList,
+                                    const nsACString& aProvider,
+                                    const nsACString& aFullHash);
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif
diff --git a/netwerk/url-classifier/nsIChannelClassifierService.idl b/netwerk/url-classifier/nsIChannelClassifierService.idl
new file mode 100644
index 0000000000..781af289f8
--- /dev/null
+++ b/netwerk/url-classifier/nsIChannelClassifierService.idl
@@ -0,0 +1,58 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "nsIContentPolicy.idl"
+#include "nsISupports.idl"
+
+interface nsIChannel;
+interface nsIURI;
+interface nsIObserver;
+
+[scriptable, uuid(9b0353a7-ab46-4914-9178-2215ee221e4e)]
+interface nsIUrlClassifierBlockedChannel: nsISupports
+{
+  // blocked reason
+  const unsigned long TRACKING_PROTECTION = 0;
+  const unsigned long SOCIAL_TRACKING_PROTECTION = 1;
+  const unsigned long FINGERPRINTING_PROTECTION = 2;
+  const unsigned long CRYPTOMINING_PROTECTION = 3;
+
+  // Feature that blocks this channel.
+  readonly attribute uint8_t reason;
+
+  // Comma separated list of tables that find a match for the channel's url.
+  readonly attribute ACString tables;
+
+  readonly attribute AString url;
+
+  readonly attribute uint64_t tabId;
+
+  readonly attribute uint64_t channelId;
+
+  readonly attribute boolean isPrivateBrowsing;
+
+  readonly attribute AString topLevelUrl;
+
+  // Unblock the load, but inform the UI that the tracking content will be
+  // replaced with a shim. The unblocked channel is still considered as a
+  // tracking channel. The only difference to allow() is the event sent to the
+  // UI. Calls to replace will only unblock the channel. Callers are responsible
+  // for replacing the tracking content.
+  void replace();
+
+  // Unblock the load and inform the UI that the channel has been allowed to
+  // load. The unblocked channel is still considered as a tracking channel.
+  void allow();
+};
+
+[scriptable, uuid(9411409c-5dac-40b9-ba36-2738a7237a4c)]
+interface nsIChannelClassifierService : nsISupports
+{
+  // when a channel is blocked, the observer should receive
+  // "urlclassifier-before-block-channel" callback an alternative way is to
+  // use a custom callback instead of using nsIObserver
+  void addListener(in nsIObserver aObserver);
+
+  void removeListener(in nsIObserver aObserver);
+};
diff --git a/netwerk/url-classifier/nsIURIClassifier.idl b/netwerk/url-classifier/nsIURIClassifier.idl
new file mode 100644
index 0000000000..788d7b3465
--- /dev/null
+++ b/netwerk/url-classifier/nsIURIClassifier.idl
@@ -0,0 +1,115 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsIUrlClassifierFeature.idl"
+
+%{C++
+#include "nsStringFwd.h"
+#include "nsTArrayForwardDeclare.h"
+%}
+[ref] native StringArrayRef(nsTArray<nsCString>);
+
+interface nsIChannel;
+interface nsISerialEventTarget;
+interface nsIPrincipal;
+interface nsIURI;
+interface nsIUrlClassifierFeatureCallback;
+
+/**
+ * Callback function for nsIURIClassifier lookups.
+ */
+[scriptable, function, uuid(8face46e-0c96-470f-af40-0037dcd797bd)]
+interface nsIURIClassifierCallback : nsISupports
+{
+  /**
+   * Called by the URI classifier service when it is done checking a URI.
+   *
+   * Clients are responsible for associating callback objects with classify()
+   * calls.
+   *
+   * @param aErrorCode
+   *        The error code with which the channel should be cancelled, or
+   *        NS_OK if the load should continue normally.
+   * @param aList
+   *        Name of the list that matched
+   * @param aProvider
+   *        Name of provider that matched
+   * @param aFullHash
+   *        Full hash of URL that matched
+   */
+  void onClassifyComplete(in nsresult aErrorCode,
+                          in ACString aList,
+                          in ACString aProvider,
+                          in ACString aFullHash);
+};
+
+/**
+ * The URI classifier service checks a URI against lists of phishing
+ * and malware sites.
+ */
+[scriptable, uuid(596620cc-76e3-4133-9d90-360e59a794cf)]
+interface nsIURIClassifier : nsISupports
+{
+  /**
+   * Classify a Principal using its URI.
+   *
+   * @param aPrincipal
+   *        The principal that should be checked by the URI classifier.
+   *
+   * @param aCallback
+   *        The URI classifier will call this callback when the URI has been
+   *        classified.
+   *
+   * @return <code>false</code> if classification is not necessary.  The
+   *         callback will not be called.
+   *         <code>true</code> if classification will be performed.  The
+   *         callback will be called.
+   */
+  boolean classify(in nsIPrincipal aPrincipal,
+                   in nsIURIClassifierCallback aCallback);
+
+  /**
+   * Asynchronously classify a URI with list of features. This does not make
+   * network requests.
+   */
+  void asyncClassifyLocalWithFeatures(in nsIURI aURI,
+                                      in Array<nsIUrlClassifierFeature> aFeatures,
+                                      in nsIUrlClassifierFeature_listType aListType,
+                                      in nsIUrlClassifierFeatureCallback aCallback);
+
+  /**
+   * Returns a feature named aFeatureName.
+   */
+  nsIUrlClassifierFeature getFeatureByName(in ACString aFeatureName);
+
+  /**
+   * Returns all the feature names.
+   */
+  Array<ACString> getFeatureNames();
+
+  /**
+   * Create a new feature with a list of tables. This method is just for
+   * testing! Don't use it elsewhere.
+   */
+  nsIUrlClassifierFeature createFeatureWithTables(in ACString aName,
+                                                  in Array<ACString> aBlocklistTables,
+                                                  in Array<ACString> aEntitylistTables);
+
+  /**
+   * Report to the provider that a Safe Browsing warning was shown.
+   *
+   * @param aChannel
+   *        Channel for which the URL matched something on the threat list.
+   * @param aProvider
+   *        Provider to notify.
+   * @param aList
+   *        List where the full hash was found.
+   * @param aFullHash
+   *        Full URL hash that triggered the warning.
+   */
+
+  void sendThreatHitReport(in nsIChannel aChannel, in ACString aProvider,
+                           in ACString aList, in ACString aFullHash);
+};
diff --git a/netwerk/url-classifier/nsIUrlClassifierExceptionListService.idl b/netwerk/url-classifier/nsIUrlClassifierExceptionListService.idl
new file mode 100644
index 0000000000..256d0b89ae
--- /dev/null
+++ b/netwerk/url-classifier/nsIUrlClassifierExceptionListService.idl
@@ -0,0 +1,71 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+/**
+ * Observer for exception list updates.
+ */
+[scriptable, function, uuid(f7c918e5-94bf-4b6e-9758-ef7bdab6af7e)]
+interface nsIUrlClassifierExceptionListObserver : nsISupports
+{
+  /**
+   * Called by nsIUrlClassifierExceptionListService when the exception list
+   * for a designated feature changes and when the observer is first registered.
+   *
+   * @param aList
+   *        A comma-separated list of url patterns, intended to be parsed
+   *        by nsContentUtils::IsURIInList.
+   */
+  void onExceptionListUpdate(in ACString aList);
+};
+
+/**
+ * A service that monitors updates to the exception list of url-classifier
+ * feature from sources such as a local pref and remote settings updates.
+ */
+[scriptable, uuid(75c3d1a3-e977-4079-9e27-b3b56bdb76ea)]
+interface nsIUrlClassifierExceptionListService : nsISupports
+{
+  /**
+   * Register a new observer to exception list updates. When the observer is
+   * registered it is called immediately once. Afterwards it will be called
+   * whenever the specified pref changes or when remote settings for
+   * url-classifier features updates.
+   *
+   * @param aFeature
+   *        The feature for which to observe the exception list.
+   *
+   * @param aPrefName
+   *        (Optional) A pref name to monitor. The pref must be of string
+   *        type and contain a comma-separated list of URL patterns.
+   *
+   * @param aObserver
+   *        An nsIUrlClassifierExceptionListObserver object or function that
+   *        will receive updates to the exception list as a comma-separated
+   *        string. Will be called immediately with the current exception
+   *        list value.
+   */
+  void registerAndRunExceptionListObserver(in ACString aFeature,
+                                      in ACString aPrefName,
+                                      in nsIUrlClassifierExceptionListObserver aObserver);
+
+  /**
+   * Unregister an observer.
+   *
+   * @param aFeature
+   *        The feature for which to stop observing.
+   *
+   * @param aObserver
+   *        The nsIUrlClassifierExceptionListObserver object to unregister.
+   */
+  void unregisterExceptionListObserver(in ACString aFeature,
+                                  in nsIUrlClassifierExceptionListObserver aObserver);
+
+  /**
+   *  Clear all data in the service.
+   *  This API is for testing only.
+   */
+  void clear();
+};
diff --git a/netwerk/url-classifier/nsIUrlClassifierFeature.idl b/netwerk/url-classifier/nsIUrlClassifierFeature.idl
new file mode 100644
index 0000000000..a7ee58289d
--- /dev/null
+++ b/netwerk/url-classifier/nsIUrlClassifierFeature.idl
@@ -0,0 +1,120 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+%{C++
+#include "nsStringFwd.h"
+#include "nsTArrayForwardDeclare.h"
+%}
+[ref] native StringArrayRef(nsTArray<nsCString>);
+[ref] native ConstStringArrayRef(const nsTArray<nsCString>);
+
+interface nsIChannel;
+interface nsIURI;
+
+/**
+ * A single URLClassifier feature.
+ */
+[builtinclass, scriptable, uuid(a6c9b24e-b4f1-426e-af58-2c976c3943a8)]
+interface nsIUrlClassifierFeature : nsISupports
+{
+  cenum listType: 8 {
+    blocklist = 0,
+    entitylist = 1,
+  };
+
+  cenum URIType: 8 {
+    blocklistURI = 0,
+    entitylistURI = 1,
+    pairwiseEntitylistURI = 2,
+  };
+
+  /**
+   * The feature name
+   */
+  readonly attribute ACString name;
+
+  /**
+   * Returns the tables for one of the possible lists.
+   */
+  [noscript] StringArrayRef getTables(in nsIUrlClassifierFeature_listType aListType);
+
+  /**
+   * Returns true if |aTable| is part of the tables of |aListType| type.
+   */
+  [noscript] boolean hasTable(in ACString aTable,
+                              in nsIUrlClassifierFeature_listType aListType);
+
+  /**
+   * Returns true if |aHost| is contained in the preference of |aListType| type.
+   * |aPrefTableName| will be set to the table name to use.
+   */
+  [noscript] boolean hasHostInPreferences(in ACString aHost,
+                                          in nsIUrlClassifierFeature_listType aListType,
+                                          out ACString aPrefTableName);
+
+  /**
+   * Returns a comma-separated list of hosts to be ignored.
+   */
+  readonly attribute ACString exceptionHostList;
+
+  /**
+   * When this feature matches the channel, this method is executed to do
+   * 'something' on the channel. For instance, a tracking-annotation feature
+   * would mark the channel as tracker, a tracking-protection feature would
+   * cancel the channel.
+   * Returns if we should process other feature results or not. For instance,
+   * tracking-protection cancel the channel, and after that we should stop
+   * processing other features.
+   */
+  [noscript] boolean processChannel(in nsIChannel aChannel,
+                                    in ConstStringArrayRef aList,
+                                    in ConstStringArrayRef aHashes);
+
+  /**
+   * Features can work with different URLs from a channel (channel url, or
+   * top-level, or something else). This method returns what we need to use for
+   * the current list.
+   * If the returned URI is created by CreatePairwiseEntityListURI(), the
+   * URIType is pairwiseEntitylistURI. Otherwise, it depends on the listType.
+   */
+  [noscript] nsIURI getURIByListType(in nsIChannel channel,
+                                     in nsIUrlClassifierFeature_listType listType,
+                                     out nsIUrlClassifierFeature_URIType URIType);
+};
+
+/**
+ * The result of the classifier operation is this interface.
+ * See asyncClassifyLocalWithFeatures() in nsIURIClassifier.idl.
+ */
+[builtinclass, scriptable, uuid(ccb88140-5d66-4873-9815-a1b98d6cdc92)]
+interface nsIUrlClassifierFeatureResult : nsISupports
+{
+  readonly attribute nsIURI uri;
+
+  readonly attribute nsIUrlClassifierFeature feature;
+
+  // Comma separate tables or preferences.
+  readonly attribute ACString list;
+};
+
+/**
+ * Callback function for nsIURIClassifier lookups.
+ * See asyncClassifyLocalWithFeatures() in nsIURIClassifier.idl.
+ */
+[scriptable, function, uuid(2ea83c26-dfc9-44ed-9cfc-171d4753d78e)]
+interface nsIUrlClassifierFeatureCallback : nsISupports
+{
+  /**
+   * Called by the URI classifier service when it is done checking a URI.
+   *
+   * Clients are responsible for associating callback objects with classify()
+   * calls.
+   *
+   * @param aResults
+   *        List of nsIUrlClassifierFeatureResult objects.
+   */
+  void onClassifyComplete(in Array<nsIUrlClassifierFeatureResult> aResults);
+};