1 files changed, 899 insertions, 0 deletions

diff --git a/toolkit/components/antitracking/AntiTrackingUtils.cpp b/toolkit/components/antitracking/AntiTrackingUtils.cpp
new file mode 100644
index 0000000000..d40cd71c48
--- /dev/null
+++ b/toolkit/components/antitracking/AntiTrackingUtils.cpp
@@ -0,0 +1,899 @@
+/* -*- 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 "AntiTrackingUtils.h"
+
+#include "AntiTrackingLog.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/Components.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/net/CookieJarSettings.h"
+#include "mozilla/LoadInfo.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/dom/WindowContext.h"
+#include "mozilla/net/NeckoChannelParams.h"
+#include "mozilla/PermissionManager.h"
+#include "mozIThirdPartyUtil.h"
+#include "nsEffectiveTLDService.h"
+#include "nsGlobalWindowInner.h"
+#include "nsIChannel.h"
+#include "nsICookieService.h"
+#include "nsIHttpChannel.h"
+#include "nsIPermission.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "nsPIDOMWindow.h"
+#include "nsRFPService.h"
+#include "nsSandboxFlags.h"
+#include "nsScriptSecurityManager.h"
+#include "PartitioningExceptionList.h"
+
+#define ANTITRACKING_PERM_KEY "3rdPartyStorage"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+/* static */ already_AddRefed<nsPIDOMWindowInner>
+AntiTrackingUtils::GetInnerWindow(BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  nsCOMPtr<nsPIDOMWindowOuter> outer = aBrowsingContext->GetDOMWindow();
+  if (!outer) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsPIDOMWindowInner> inner = outer->GetCurrentInnerWindow();
+  return inner.forget();
+}
+
+/* static */ already_AddRefed<nsPIDOMWindowOuter>
+AntiTrackingUtils::GetTopWindow(nsPIDOMWindowInner* aWindow) {
+  Document* document = aWindow->GetExtantDoc();
+  if (!document) {
+    return nullptr;
+  }
+
+  nsIChannel* channel = document->GetChannel();
+  if (!channel) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsPIDOMWindowOuter> pwin =
+      aWindow->GetBrowsingContext()->Top()->GetDOMWindow();
+
+  if (!pwin) {
+    return nullptr;
+  }
+
+  return pwin.forget();
+}
+
+/* static */
+already_AddRefed<nsIURI> AntiTrackingUtils::MaybeGetDocumentURIBeingLoaded(
+    nsIChannel* aChannel) {
+  nsCOMPtr<nsIURI> uriBeingLoaded;
+  nsLoadFlags loadFlags = 0;
+  nsresult rv = aChannel->GetLoadFlags(&loadFlags);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nullptr;
+  }
+  if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
+    // If the channel being loaded is a document channel, this call may be
+    // coming from an OnStopRequest notification, which might mean that our
+    // document may still be in the loading process, so we may need to pass in
+    // the uriBeingLoaded argument explicitly.
+    rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(uriBeingLoaded));
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return nullptr;
+    }
+  }
+  return uriBeingLoaded.forget();
+}
+
+// static
+void AntiTrackingUtils::CreateStoragePermissionKey(
+    const nsACString& aTrackingOrigin, nsACString& aPermissionKey) {
+  MOZ_ASSERT(aPermissionKey.IsEmpty());
+
+  static const nsLiteralCString prefix =
+      nsLiteralCString(ANTITRACKING_PERM_KEY "^");
+
+  aPermissionKey.SetCapacity(prefix.Length() + aTrackingOrigin.Length());
+  aPermissionKey.Append(prefix);
+  aPermissionKey.Append(aTrackingOrigin);
+}
+
+// static
+bool AntiTrackingUtils::CreateStoragePermissionKey(nsIPrincipal* aPrincipal,
+                                                   nsACString& aKey) {
+  if (!aPrincipal) {
+    return false;
+  }
+
+  nsAutoCString origin;
+  nsresult rv = aPrincipal->GetOriginNoSuffix(origin);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return false;
+  }
+
+  CreateStoragePermissionKey(origin, aKey);
+  return true;
+}
+
+// static
+bool AntiTrackingUtils::CreateStorageRequestPermissionKey(
+    nsIURI* aURI, nsACString& aPermissionKey) {
+  MOZ_ASSERT(aPermissionKey.IsEmpty());
+  RefPtr<nsEffectiveTLDService> eTLDService =
+      nsEffectiveTLDService::GetInstance();
+  if (!eTLDService) {
+    return false;
+  }
+  nsCString site;
+  nsresult rv = eTLDService->GetSite(aURI, site);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+  static const nsLiteralCString prefix =
+      nsLiteralCString("AllowStorageAccessRequest^");
+  aPermissionKey.SetCapacity(prefix.Length() + site.Length());
+  aPermissionKey.Append(prefix);
+  aPermissionKey.Append(site);
+  return true;
+}
+
+// static
+bool AntiTrackingUtils::IsStorageAccessPermission(nsIPermission* aPermission,
+                                                  nsIPrincipal* aPrincipal) {
+  MOZ_ASSERT(aPermission);
+  MOZ_ASSERT(aPrincipal);
+
+  // The permission key may belong either to a tracking origin on the same
+  // origin as the granted origin, or on another origin as the granted origin
+  // (for example when a tracker in a third-party context uses window.open to
+  // open another origin where that second origin would be the granted origin.)
+  // But even in the second case, the type of the permission would still be
+  // formed by concatenating the granted origin to the end of the type name
+  // (see CreatePermissionKey).  Therefore, we pass in the same argument to
+  // both tracking origin and granted origin here in order to compute the
+  // shorter permission key and will then do a prefix match on the type of the
+  // input permission to see if it is a storage access permission or not.
+  nsAutoCString permissionKey;
+  bool result = CreateStoragePermissionKey(aPrincipal, permissionKey);
+  if (NS_WARN_IF(!result)) {
+    return false;
+  }
+
+  nsAutoCString type;
+  nsresult rv = aPermission->GetType(type);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return false;
+  }
+
+  return StringBeginsWith(type, permissionKey);
+}
+
+// static
+Maybe<size_t> AntiTrackingUtils::CountSitesAllowStorageAccess(
+    nsIPrincipal* aPrincipal) {
+  PermissionManager* permManager = PermissionManager::GetInstance();
+  if (NS_WARN_IF(!permManager)) {
+    return Nothing();
+  }
+
+  nsAutoCString prefix;
+  AntiTrackingUtils::CreateStoragePermissionKey(aPrincipal, prefix);
+
+  using Permissions = nsTArray<RefPtr<nsIPermission>>;
+  Permissions perms;
+  nsresult rv = permManager->GetAllWithTypePrefix(prefix, perms);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return Nothing();
+  }
+
+  // Create a set of unique origins
+  using Origins = nsTArray<nsCString>;
+  Origins origins;
+
+  // Iterate over all permissions that have a prefix equal to the expected
+  // permission we are looking for. This includes two things we need to remove:
+  // duplicates and origin strings that have a prefix of aPrincipal's origin
+  // string, e.g. https://example.company when aPrincipal is
+  // https://example.com.
+  for (const auto& perm : perms) {
+    nsAutoCString type;
+    rv = perm->GetType(type);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return Nothing();
+    }
+    // Let's make sure that we're not looking at a permission for
+    // https://exampletracker.company when we mean to look for the
+    // permission for https://exampletracker.com!
+    if (type != prefix) {
+      continue;
+    }
+
+    nsCOMPtr<nsIPrincipal> principal;
+    rv = perm->GetPrincipal(getter_AddRefs(principal));
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return Nothing();
+    }
+
+    nsAutoCString origin;
+    rv = principal->GetOrigin(origin);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return Nothing();
+    }
+
+    ToLowerCase(origin);
+
+    // Append if it would not be a duplicate
+    if (origins.IndexOf(origin) == Origins::NoIndex) {
+      origins.AppendElement(origin);
+    }
+  }
+
+  return Some(origins.Length());
+}
+
+// static
+bool AntiTrackingUtils::CheckStoragePermission(nsIPrincipal* aPrincipal,
+                                               const nsAutoCString& aType,
+                                               bool aIsInPrivateBrowsing,
+                                               uint32_t* aRejectedReason,
+                                               uint32_t aBlockedReason) {
+  PermissionManager* permManager = PermissionManager::GetInstance();
+  if (NS_WARN_IF(!permManager)) {
+    LOG(("Failed to obtain the permission manager"));
+    return false;
+  }
+
+  uint32_t result = 0;
+  if (aIsInPrivateBrowsing) {
+    LOG_PRIN(("Querying the permissions for private modei looking for a "
+              "permission of type %s for %s",
+              aType.get(), _spec),
+             aPrincipal);
+    if (!permManager->PermissionAvailable(aPrincipal, aType)) {
+      LOG(
+          ("Permission isn't available for this principal in the current "
+           "process"));
+      return false;
+    }
+    nsTArray<RefPtr<nsIPermission>> permissions;
+    nsresult rv = permManager->GetAllForPrincipal(aPrincipal, permissions);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      LOG(("Failed to get the list of permissions"));
+      return false;
+    }
+
+    bool found = false;
+    for (const auto& permission : permissions) {
+      if (!permission) {
+        LOG(("Couldn't get the permission for unknown reasons"));
+        continue;
+      }
+
+      nsAutoCString permissionType;
+      if (NS_SUCCEEDED(permission->GetType(permissionType)) &&
+          permissionType != aType) {
+        LOG(("Non-matching permission type: %s", aType.get()));
+        continue;
+      }
+
+      uint32_t capability = 0;
+      if (NS_SUCCEEDED(permission->GetCapability(&capability)) &&
+          capability != nsIPermissionManager::ALLOW_ACTION) {
+        LOG(("Non-matching permission capability: %d", capability));
+        continue;
+      }
+
+      uint32_t expirationType = 0;
+      if (NS_SUCCEEDED(permission->GetExpireType(&expirationType)) &&
+          expirationType != nsIPermissionManager ::EXPIRE_SESSION) {
+        LOG(("Non-matching permission expiration type: %d", expirationType));
+        continue;
+      }
+
+      int64_t expirationTime = 0;
+      if (NS_SUCCEEDED(permission->GetExpireTime(&expirationTime)) &&
+          expirationTime != 0) {
+        LOG(("Non-matching permission expiration time: %" PRId64,
+             expirationTime));
+        continue;
+      }
+
+      LOG(("Found a matching permission"));
+      found = true;
+      break;
+    }
+
+    if (!found) {
+      if (aRejectedReason) {
+        *aRejectedReason = aBlockedReason;
+      }
+      return false;
+    }
+  } else {
+    nsresult rv = permManager->TestPermissionWithoutDefaultsFromPrincipal(
+        aPrincipal, aType, &result);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      LOG(("Failed to test the permission"));
+      return false;
+    }
+
+    LOG_PRIN(
+        ("Testing permission type %s for %s resulted in %d (%s)", aType.get(),
+         _spec, int(result),
+         result == nsIPermissionManager::ALLOW_ACTION ? "success" : "failure"),
+        aPrincipal);
+
+    if (result != nsIPermissionManager::ALLOW_ACTION) {
+      if (aRejectedReason) {
+        *aRejectedReason = aBlockedReason;
+      }
+      return false;
+    }
+  }
+
+  return true;
+}
+
+/* static */
+nsILoadInfo::StoragePermissionState
+AntiTrackingUtils::GetStoragePermissionStateInParent(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+  MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+
+  auto policyType = loadInfo->GetExternalContentPolicyType();
+
+  // The channel is for the document load of the top-level window. The top-level
+  // window should always has 'hasStoragePermission' flag as false. So, we can
+  // return here directly.
+  if (policyType == ExtContentPolicy::TYPE_DOCUMENT) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  nsresult rv =
+      loadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  int32_t cookieBehavior = cookieJarSettings->GetCookieBehavior();
+
+  // We only need to check the storage permission if the cookie behavior is
+  // BEHAVIOR_REJECT_TRACKER, BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN or
+  // BEHAVIOR_REJECT_FOREIGN with exceptions. Because ContentBlocking wouldn't
+  // update or check the storage permission if the cookie behavior is not
+  // belongs to these three.
+  if (!net::CookieJarSettings::IsRejectThirdPartyContexts(cookieBehavior)) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  RefPtr<BrowsingContext> bc;
+  rv = loadInfo->GetTargetBrowsingContext(getter_AddRefs(bc));
+  if (NS_WARN_IF(NS_FAILED(rv)) || !bc) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  uint64_t targetWindowId = GetTopLevelAntiTrackingWindowId(bc);
+  nsCOMPtr<nsIPrincipal> targetPrincipal;
+
+  if (targetWindowId) {
+    RefPtr<WindowGlobalParent> wgp =
+        WindowGlobalParent::GetByInnerWindowId(targetWindowId);
+
+    if (NS_WARN_IF(!wgp)) {
+      return nsILoadInfo::NoStoragePermission;
+    }
+
+    targetPrincipal = wgp->DocumentPrincipal();
+  } else {
+    // We try to use the loading principal if there is no AntiTrackingWindowId.
+    targetPrincipal = loadInfo->GetLoadingPrincipal();
+  }
+
+  if (!targetPrincipal) {
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
+
+    if (httpChannel) {
+      // We don't have a loading principal, let's see if this is a document
+      // channel which belongs to a top-level window.
+      bool isDocument = false;
+      rv = httpChannel->GetIsMainDocumentChannel(&isDocument);
+      if (NS_SUCCEEDED(rv) && isDocument) {
+        nsIScriptSecurityManager* ssm =
+            nsScriptSecurityManager::GetScriptSecurityManager();
+        Unused << ssm->GetChannelResultPrincipal(
+            aChannel, getter_AddRefs(targetPrincipal));
+      }
+    }
+  }
+
+  // Let's use the triggering principal if we still have nothing on the hand.
+  if (!targetPrincipal) {
+    targetPrincipal = loadInfo->TriggeringPrincipal();
+  }
+
+  // Cannot get the target principal, bail out.
+  if (NS_WARN_IF(!targetPrincipal)) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  nsCOMPtr<nsIURI> trackingURI;
+  rv = aChannel->GetURI(getter_AddRefs(trackingURI));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  nsAutoCString trackingOrigin;
+  rv = nsContentUtils::GetASCIIOrigin(trackingURI, trackingOrigin);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nsILoadInfo::NoStoragePermission;
+  }
+
+  if (IsThirdPartyChannel(aChannel)) {
+    nsAutoCString targetOrigin;
+    if (NS_FAILED(targetPrincipal->GetAsciiOrigin(targetOrigin))) {
+      return nsILoadInfo::NoStoragePermission;
+    }
+
+    if (PartitioningExceptionList::Check(targetOrigin, trackingOrigin)) {
+      return nsILoadInfo::StoragePermissionAllowListed;
+    }
+  }
+
+  nsAutoCString type;
+  AntiTrackingUtils::CreateStoragePermissionKey(trackingOrigin, type);
+
+  uint32_t unusedReason = 0;
+
+  if (AntiTrackingUtils::CheckStoragePermission(targetPrincipal, type,
+                                                NS_UsePrivateBrowsing(aChannel),
+                                                &unusedReason, unusedReason)) {
+    return nsILoadInfo::HasStoragePermission;
+  }
+
+  return nsILoadInfo::NoStoragePermission;
+}
+
+uint64_t AntiTrackingUtils::GetTopLevelAntiTrackingWindowId(
+    BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  RefPtr<WindowContext> winContext =
+      aBrowsingContext->GetCurrentWindowContext();
+  if (!winContext || winContext->GetCookieBehavior().isNothing()) {
+    return 0;
+  }
+
+  // Do not check BEHAVIOR_REJECT_TRACKER_AND_PARTITION_FOREIGN her because when
+  // a third-party subresource is inside the main frame, we need to return the
+  // top-level window id to partition its cookies correctly.
+  uint32_t behavior = *winContext->GetCookieBehavior();
+  if (behavior == nsICookieService::BEHAVIOR_REJECT_TRACKER &&
+      aBrowsingContext->IsTop()) {
+    return 0;
+  }
+
+  return aBrowsingContext->Top()->GetCurrentInnerWindowId();
+}
+
+uint64_t AntiTrackingUtils::GetTopLevelStorageAreaWindowId(
+    BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  if (Document::StorageAccessSandboxed(aBrowsingContext->GetSandboxFlags())) {
+    return 0;
+  }
+
+  BrowsingContext* parentBC = aBrowsingContext->GetParent();
+  if (!parentBC) {
+    // No parent browsing context available!
+    return 0;
+  }
+
+  if (!parentBC->IsTop()) {
+    return 0;
+  }
+
+  return parentBC->GetCurrentInnerWindowId();
+}
+
+/* static */
+already_AddRefed<nsIPrincipal> AntiTrackingUtils::GetPrincipal(
+    BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  nsCOMPtr<nsIPrincipal> principal;
+
+  if (XRE_IsContentProcess()) {
+    // Passing an out-of-process browsing context in child processes to
+    // this API won't get any result, so just assert.
+    MOZ_ASSERT(aBrowsingContext->IsInProcess());
+
+    nsPIDOMWindowOuter* outer = aBrowsingContext->GetDOMWindow();
+    if (NS_WARN_IF(!outer)) {
+      return nullptr;
+    }
+
+    nsPIDOMWindowInner* inner = outer->GetCurrentInnerWindow();
+    if (NS_WARN_IF(!inner)) {
+      return nullptr;
+    }
+
+    principal = nsGlobalWindowInner::Cast(inner)->GetPrincipal();
+  } else {
+    WindowGlobalParent* wgp =
+        aBrowsingContext->Canonical()->GetCurrentWindowGlobal();
+    if (NS_WARN_IF(!wgp)) {
+      return nullptr;
+    }
+
+    principal = wgp->DocumentPrincipal();
+  }
+  return principal.forget();
+}
+
+/* static */
+bool AntiTrackingUtils::GetPrincipalAndTrackingOrigin(
+    BrowsingContext* aBrowsingContext, nsIPrincipal** aPrincipal,
+    nsACString& aTrackingOrigin) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  // Passing an out-of-process browsing context in child processes to
+  // this API won't get any result, so just assert.
+  MOZ_ASSERT_IF(XRE_IsContentProcess(), aBrowsingContext->IsInProcess());
+
+  // Let's take the principal and the origin of the tracker.
+  nsCOMPtr<nsIPrincipal> principal =
+      AntiTrackingUtils::GetPrincipal(aBrowsingContext);
+  if (NS_WARN_IF(!principal)) {
+    return false;
+  }
+
+  nsresult rv = principal->GetOriginNoSuffix(aTrackingOrigin);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return false;
+  }
+
+  if (aPrincipal) {
+    principal.forget(aPrincipal);
+  }
+
+  return true;
+};
+
+/* static */
+uint32_t AntiTrackingUtils::GetCookieBehavior(
+    BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+
+  RefPtr<dom::WindowContext> win = aBrowsingContext->GetCurrentWindowContext();
+  if (!win || win->GetCookieBehavior().isNothing()) {
+    return nsICookieService::BEHAVIOR_REJECT;
+  }
+
+  return *win->GetCookieBehavior();
+}
+
+/* static */
+already_AddRefed<WindowGlobalParent>
+AntiTrackingUtils::GetTopWindowExcludingExtensionAccessibleContentFrames(
+    CanonicalBrowsingContext* aBrowsingContext, nsIURI* aURIBeingLoaded) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(aBrowsingContext);
+
+  CanonicalBrowsingContext* bc = aBrowsingContext;
+  RefPtr<WindowGlobalParent> prev;
+  while (RefPtr<WindowGlobalParent> parent = bc->GetParentWindowContext()) {
+    CanonicalBrowsingContext* parentBC = parent->BrowsingContext();
+
+    nsIPrincipal* parentPrincipal = parent->DocumentPrincipal();
+    nsIURI* uri = prev ? prev->GetDocumentURI() : aURIBeingLoaded;
+
+    // If the new parent has permission to load the current page, we're
+    // at a moz-extension:// frame which has a host permission that allows
+    // it to load the document that we've loaded.  In that case, stop at
+    // this frame and consider it the top-level frame.
+    if (uri &&
+        BasePrincipal::Cast(parentPrincipal)->AddonAllowsLoad(uri, true)) {
+      break;
+    }
+
+    bc = parentBC;
+    prev = parent;
+  }
+  if (!prev) {
+    prev = bc->GetCurrentWindowGlobal();
+  }
+  return prev.forget();
+}
+
+/* static */
+void AntiTrackingUtils::ComputeIsThirdPartyToTopWindow(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+
+  // When a top-level load is opened by window.open, BrowsingContext from
+  // LoadInfo is its opener, which may make the third-party caculation code
+  // below returns an incorrect result. So we use TYPE_DOCUMENT to
+  // ensure a top-level load is not considered 3rd-party.
+  auto policyType = loadInfo->GetExternalContentPolicyType();
+  if (policyType == ExtContentPolicy::TYPE_DOCUMENT) {
+    loadInfo->SetIsThirdPartyContextToTopWindow(false);
+    return;
+  }
+
+  RefPtr<BrowsingContext> bc;
+  loadInfo->GetBrowsingContext(getter_AddRefs(bc));
+
+  nsCOMPtr<nsIURI> uri;
+  Unused << aChannel->GetURI(getter_AddRefs(uri));
+
+  // In some cases we don't have a browsingContext. For example, in xpcshell
+  // tests, channels that are used to download images and channels for loading
+  // worker script.
+  if (!bc) {
+    // If the flag was set before, we don't need to compute again. This could
+    // happen for the channels used to load worker scripts.
+    //
+    // Note that we cannot stop computing the flag in general even it has set
+    // before because sometimes we need to get the up-to-date flag, e.g.
+    // redirects.
+    if (static_cast<net::LoadInfo*>(loadInfo.get())
+            ->HasIsThirdPartyContextToTopWindowSet()) {
+      return;
+    }
+
+    // We turn to check the loading principal if there is no browsing context.
+    auto* loadingPrincipal =
+        BasePrincipal::Cast(loadInfo->GetLoadingPrincipal());
+
+    if (uri && loadingPrincipal) {
+      bool isThirdParty = true;
+      nsresult rv = loadingPrincipal->IsThirdPartyURI(uri, &isThirdParty);
+
+      if (NS_SUCCEEDED(rv)) {
+        loadInfo->SetIsThirdPartyContextToTopWindow(isThirdParty);
+      }
+    }
+    return;
+  }
+
+  RefPtr<WindowGlobalParent> topWindow =
+      GetTopWindowExcludingExtensionAccessibleContentFrames(bc->Canonical(),
+                                                            uri);
+
+  if (NS_WARN_IF(!topWindow)) {
+    return;
+  }
+
+  nsCOMPtr<nsIPrincipal> topWindowPrincipal = topWindow->DocumentPrincipal();
+  if (topWindowPrincipal && !topWindowPrincipal->GetIsNullPrincipal()) {
+    auto* basePrin = BasePrincipal::Cast(topWindowPrincipal);
+    bool isThirdParty = true;
+
+    // For about:blank and about:srcdoc, we can't just compare uri to determine
+    // whether the page is third-party, so we use channel result principal
+    // instead. By doing this, an the resource inherits the principal from
+    // its parent is considered not a third-party.
+    if (NS_IsAboutBlank(uri) || NS_IsAboutSrcdoc(uri)) {
+      nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
+      if (NS_WARN_IF(!ssm)) {
+        return;
+      }
+
+      nsCOMPtr<nsIPrincipal> principal;
+      nsresult rv =
+          ssm->GetChannelResultPrincipal(aChannel, getter_AddRefs(principal));
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return;
+      }
+
+      basePrin->IsThirdPartyPrincipal(principal, &isThirdParty);
+    } else {
+      basePrin->IsThirdPartyURI(uri, &isThirdParty);
+    }
+
+    loadInfo->SetIsThirdPartyContextToTopWindow(isThirdParty);
+  }
+}
+
+/* static */
+bool AntiTrackingUtils::IsThirdPartyChannel(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  // We only care whether the channel is 3rd-party with respect to
+  // the top-level.
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+  return loadInfo->GetIsThirdPartyContextToTopWindow();
+}
+
+/* static */
+bool AntiTrackingUtils::IsThirdPartyWindow(nsPIDOMWindowInner* aWindow,
+                                           nsIURI* aURI) {
+  MOZ_ASSERT(aWindow);
+
+  // We assume that the window is foreign to the URI by default.
+  bool thirdParty = true;
+
+  // We will skip checking URIs for about:blank and about:srcdoc because they
+  // have no domain. So, comparing them will always fail.
+  if (aURI && !NS_IsAboutBlank(aURI) && !NS_IsAboutSrcdoc(aURI)) {
+    nsCOMPtr<nsIScriptObjectPrincipal> scriptObjPrin =
+        do_QueryInterface(aWindow);
+    if (!scriptObjPrin) {
+      return thirdParty;
+    }
+
+    nsCOMPtr<nsIPrincipal> prin = scriptObjPrin->GetPrincipal();
+    if (!prin) {
+      return thirdParty;
+    }
+
+    // Determine whether aURI is foreign with respect to the current principal.
+    nsresult rv = prin->IsThirdPartyURI(aURI, &thirdParty);
+    if (NS_FAILED(rv)) {
+      return thirdParty;
+    }
+
+    if (thirdParty) {
+      return thirdParty;
+    }
+  }
+
+  RefPtr<Document> doc = aWindow->GetDoc();
+  if (!doc) {
+    // If we can't get the document from the window, ex, about:blank, fallback
+    // to use IsThirdPartyWindow check that examine the whole hierarchy.
+    nsCOMPtr<mozIThirdPartyUtil> thirdPartyUtil =
+        components::ThirdPartyUtil::Service();
+    Unused << thirdPartyUtil->IsThirdPartyWindow(aWindow->GetOuterWindow(),
+                                                 nullptr, &thirdParty);
+    return thirdParty;
+  }
+
+  return IsThirdPartyDocument(doc);
+}
+
+/* static */
+bool AntiTrackingUtils::IsThirdPartyDocument(Document* aDocument) {
+  MOZ_ASSERT(aDocument);
+  if (!aDocument->GetChannel()) {
+    // If we can't get the channel from the document, i.e. initial about:blank
+    // page, we use the browsingContext of the document to check if it's in the
+    // third-party context. If the browsing context is still not available, we
+    // will treat the window as third-party.
+    RefPtr<BrowsingContext> bc = aDocument->GetBrowsingContext();
+    return bc ? IsThirdPartyContext(bc) : true;
+  }
+
+  // We only care whether the channel is 3rd-party with respect to
+  // the top-level.
+  nsCOMPtr<nsILoadInfo> loadInfo = aDocument->GetChannel()->LoadInfo();
+  return loadInfo->GetIsThirdPartyContextToTopWindow();
+}
+
+/* static */
+bool AntiTrackingUtils::IsThirdPartyContext(BrowsingContext* aBrowsingContext) {
+  MOZ_ASSERT(aBrowsingContext);
+  MOZ_ASSERT(aBrowsingContext->IsInProcess());
+
+  if (aBrowsingContext->IsTopContent()) {
+    return false;
+  }
+
+  // If the top browsing context is not in the same process, it's cross-origin.
+  if (!aBrowsingContext->Top()->IsInProcess()) {
+    return true;
+  }
+
+  nsIDocShell* docShell = aBrowsingContext->GetDocShell();
+  if (!docShell) {
+    return true;
+  }
+  Document* doc = docShell->GetExtantDocument();
+  if (!doc) {
+    return true;
+  }
+  nsIPrincipal* principal = doc->NodePrincipal();
+
+  nsIDocShell* topDocShell = aBrowsingContext->Top()->GetDocShell();
+  if (!topDocShell) {
+    return true;
+  }
+  Document* topDoc = topDocShell->GetDocument();
+  if (!topDoc) {
+    return true;
+  }
+  nsIPrincipal* topPrincipal = topDoc->NodePrincipal();
+
+  auto* topBasePrin = BasePrincipal::Cast(topPrincipal);
+  bool isThirdParty = true;
+
+  topBasePrin->IsThirdPartyPrincipal(principal, &isThirdParty);
+
+  return isThirdParty;
+}
+
+/* static */
+nsCString AntiTrackingUtils::GrantedReasonToString(
+    ContentBlockingNotifier::StorageAccessPermissionGrantedReason aReason) {
+  switch (aReason) {
+    case ContentBlockingNotifier::eOpener:
+      return "opener"_ns;
+    case ContentBlockingNotifier::eOpenerAfterUserInteraction:
+      return "user interaction"_ns;
+    default:
+      return "stroage access API"_ns;
+  }
+}
+
+/* static */
+void AntiTrackingUtils::UpdateAntiTrackingInfoForChannel(nsIChannel* aChannel) {
+  MOZ_ASSERT(aChannel);
+
+  if (!XRE_IsParentProcess()) {
+    return;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess());
+
+  AntiTrackingUtils::ComputeIsThirdPartyToTopWindow(aChannel);
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+
+  Unused << loadInfo->SetStoragePermission(
+      AntiTrackingUtils::GetStoragePermissionStateInParent(aChannel));
+
+  // We only update the IsOnContentBlockingAllowList flag and the partition key
+  // for the top-level http channel.
+  //
+  // The IsOnContentBlockingAllowList is only for http. For other types of
+  // channels, such as 'file:', there will be no interface to modify this. So,
+  // we only update it in http channels.
+  //
+  // The partition key is computed based on the site, so it's no point to set it
+  // for channels other than http channels.
+  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
+  if (!httpChannel || loadInfo->GetExternalContentPolicyType() !=
+                          ExtContentPolicy::TYPE_DOCUMENT) {
+    return;
+  }
+
+  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+  Unused << loadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
+
+  // Update the IsOnContentBlockingAllowList flag in the CookieJarSettings
+  // if this is a top level loading. For sub-document loading, this flag
+  // would inherit from the parent.
+  net::CookieJarSettings::Cast(cookieJarSettings)
+      ->UpdateIsOnContentBlockingAllowList(aChannel);
+
+  // We only need to set FPD for top-level loads. FPD will automatically be
+  // propagated to non-top level loads via CookieJarSetting.
+  nsCOMPtr<nsIURI> uri;
+  Unused << aChannel->GetURI(getter_AddRefs(uri));
+  net::CookieJarSettings::Cast(cookieJarSettings)->SetPartitionKey(uri);
+
+  // Generate the fingerprinting randomization key for top-level loads. The key
+  // will automatically be propagated to sub loads.
+  auto RFPRandomKey =
+      nsRFPService::GenerateKey(uri, NS_UsePrivateBrowsing(aChannel));
+  if (RFPRandomKey) {
+    net::CookieJarSettings::Cast(cookieJarSettings)
+        ->SetFingerprintingRandomizationKey(RFPRandomKey.ref());
+  }
+}