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

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

1 files changed, 10142 insertions, 0 deletions

diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
new file mode 100644
index 0000000000..cfeeed9b24
--- /dev/null
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -0,0 +1,10142 @@
+/* -*- 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/. */
+
+// HttpLog.h should generally be included first
+#include "HttpLog.h"
+
+#include <inttypes.h>
+
+#include "DocumentChannelParent.h"
+#include "mozilla/MozPromiseInlines.h"  // For MozPromise::FromDomPromise
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/dom/nsCSPService.h"
+#include "mozilla/StoragePrincipalHelper.h"
+
+#include "nsContentSecurityUtils.h"
+#include "nsHttp.h"
+#include "nsHttpChannel.h"
+#include "nsHttpChannelAuthProvider.h"
+#include "nsHttpHandler.h"
+#include "nsString.h"
+#include "nsICacheStorageService.h"
+#include "nsICacheStorage.h"
+#include "nsICacheEntry.h"
+#include "nsICryptoHash.h"
+#include "nsIEffectiveTLDService.h"
+#include "nsIHttpHeaderVisitor.h"
+#include "nsINetworkInterceptController.h"
+#include "nsINSSErrorsService.h"
+#include "nsIStringBundle.h"
+#include "nsIStreamListenerTee.h"
+#include "nsISeekableStream.h"
+#include "nsIProtocolProxyService2.h"
+#include "nsIURLQueryStringStripper.h"
+#include "nsIWebTransport.h"
+#include "nsCRT.h"
+#include "nsMimeTypes.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsIURL.h"
+#include "nsIStreamTransportService.h"
+#include "prnetdb.h"
+#include "nsEscape.h"
+#include "nsComponentManagerUtils.h"
+#include "nsStreamUtils.h"
+#include "nsIOService.h"
+#include "nsDNSPrefetch.h"
+#include "nsChannelClassifier.h"
+#include "nsIRedirectResultListener.h"
+#include "mozilla/TimeStamp.h"
+#include "nsError.h"
+#include "nsPrintfCString.h"
+#include "nsAlgorithm.h"
+#include "nsQueryObject.h"
+#include "nsThreadUtils.h"
+#include "nsIConsoleService.h"
+#include "mozilla/AntiTrackingRedirectHeuristic.h"
+#include "mozilla/AntiTrackingUtils.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/Components.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/StaticPrefs_fission.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "mozilla/StaticPrefs_privacy.h"
+#include "mozilla/StaticPrefs_security.h"
+#include "sslt.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsContentUtils.h"
+#include "nsContentSecurityManager.h"
+#include "nsIClassOfService.h"
+#include "nsIPrincipal.h"
+#include "nsIScriptError.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsITransportSecurityInfo.h"
+#include "nsIWebProgressListener.h"
+#include "LoadContextInfo.h"
+#include "netCore.h"
+#include "nsHttpTransaction.h"
+#include "nsICancelable.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIPrompt.h"
+#include "nsInputStreamPump.h"
+#include "nsURLHelper.h"
+#include "nsISocketTransport.h"
+#include "nsIStreamConverterService.h"
+#include "nsISiteSecurityService.h"
+#include "nsString.h"
+#include "CacheObserver.h"
+#include "mozilla/dom/PerformanceStorage.h"
+#include "mozilla/dom/ReferrerInfo.h"
+#include "mozilla/Telemetry.h"
+#include "AlternateServices.h"
+#include "NetworkMarker.h"
+#include "nsIHttpPushListener.h"
+#include "nsIX509Cert.h"
+#include "ScopedNSSTypes.h"
+#include "nsIDNSRecord.h"
+#include "mozilla/dom/Document.h"
+#include "nsICompressConvStats.h"
+#include "nsCORSListenerProxy.h"
+#include "nsISocketProvider.h"
+#include "mozilla/extensions/StreamFilterParent.h"
+#include "mozilla/net/Predictor.h"
+#include "mozilla/MathAlgorithms.h"
+#include "mozilla/NullPrincipal.h"
+#include "CacheControlParser.h"
+#include "nsMixedContentBlocker.h"
+#include "CacheStorageService.h"
+#include "HttpChannelParent.h"
+#include "HttpTransactionParent.h"
+#include "ParentChannelListener.h"
+#include "ThirdPartyUtil.h"
+#include "InterceptedHttpChannel.h"
+#include "../../cache2/CacheFileUtils.h"
+#include "nsIMultiplexInputStream.h"
+#include "nsINetworkLinkService.h"
+#include "mozilla/ContentBlockingAllowList.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/ServiceWorkerUtils.h"
+#include "mozilla/dom/nsHTTPSOnlyStreamListener.h"
+#include "mozilla/dom/nsHTTPSOnlyUtils.h"
+#include "mozilla/net/AsyncUrlChannelClassifier.h"
+#include "mozilla/net/CookieJarSettings.h"
+#include "mozilla/net/NeckoChannelParams.h"
+#include "mozilla/net/OpaqueResponseUtils.h"
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+#include "HttpTrafficAnalyzer.h"
+#include "mozilla/net/SocketProcessParent.h"
+#include "js/Conversions.h"
+#include "mozilla/dom/SecFetch.h"
+#include "mozilla/net/TRRService.h"
+#include "nsUnknownDecoder.h"
+#ifdef XP_WIN
+#  include "HttpWinUtils.h"
+#endif
+#ifdef FUZZING
+#  include "mozilla/StaticPrefs_fuzzing.h"
+#endif
+
+namespace mozilla {
+
+using namespace dom;
+
+namespace net {
+
+namespace {
+
+// True if the local cache should be bypassed when processing a request.
+#define BYPASS_LOCAL_CACHE(loadFlags, isPreferCacheLoadOverBypass) \
+  ((loadFlags) & (nsIRequest::LOAD_BYPASS_CACHE |                  \
+                  nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE) &&   \
+   !(((loadFlags)&nsIRequest::LOAD_FROM_CACHE) &&                  \
+     (isPreferCacheLoadOverBypass)))
+
+#define RECOVER_FROM_CACHE_FILE_ERROR(result) \
+  ((result) == NS_ERROR_FILE_NOT_FOUND ||     \
+   (result) == NS_ERROR_FILE_CORRUPTED || (result) == NS_ERROR_OUT_OF_MEMORY)
+
+#define WRONG_RACING_RESPONSE_SOURCE(req)               \
+  (mRaceCacheWithNetwork &&                             \
+   (((mFirstResponseSource == RESPONSE_FROM_CACHE) &&   \
+     ((req) != mCachePump)) ||                          \
+    ((mFirstResponseSource == RESPONSE_FROM_NETWORK) && \
+     ((req) != mTransactionPump))))
+
+static NS_DEFINE_CID(kStreamListenerTeeCID, NS_STREAMLISTENERTEE_CID);
+
+void AccumulateCacheHitTelemetry(CacheDisposition hitOrMiss,
+                                 nsIChannel* aChannel) {
+  nsCString key("UNKNOWN");
+
+  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
+
+  nsAutoCString contentType;
+  if (NS_SUCCEEDED(aChannel->GetContentType(contentType))) {
+    if (nsContentUtils::IsJavascriptMIMEType(
+            NS_ConvertUTF8toUTF16(contentType))) {
+      key.AssignLiteral("JAVASCRIPT");
+    } else if (StringBeginsWith(contentType, "text/css"_ns) ||
+               (loadInfo && loadInfo->GetExternalContentPolicyType() ==
+                                ExtContentPolicy::TYPE_STYLESHEET)) {
+      key.AssignLiteral("STYLESHEET");
+    } else if (StringBeginsWith(contentType, "application/wasm"_ns)) {
+      key.AssignLiteral("WASM");
+    } else if (StringBeginsWith(contentType, "image/"_ns)) {
+      key.AssignLiteral("IMAGE");
+    } else if (StringBeginsWith(contentType, "video/"_ns)) {
+      key.AssignLiteral("MEDIA");
+    } else if (StringBeginsWith(contentType, "audio/"_ns)) {
+      key.AssignLiteral("MEDIA");
+    } else if (!StringBeginsWith(contentType,
+                                 nsLiteralCString(UNKNOWN_CONTENT_TYPE))) {
+      key.AssignLiteral("OTHER");
+    }
+  }
+
+  Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3 label =
+      Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::Unresolved;
+  switch (hitOrMiss) {
+    case kCacheUnresolved:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::Unresolved;
+      break;
+    case kCacheHit:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::Hit;
+      break;
+    case kCacheHitViaReval:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::HitViaReval;
+      break;
+    case kCacheMissedViaReval:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::MissedViaReval;
+      break;
+    case kCacheMissed:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::Missed;
+      break;
+    case kCacheUnknown:
+      label = Telemetry::LABELS_HTTP_CACHE_DISPOSITION_3::Unknown;
+      break;
+  }
+
+  Telemetry::AccumulateCategoricalKeyed(key, label);
+  Telemetry::AccumulateCategoricalKeyed("ALL"_ns, label);
+}
+
+// Computes and returns a SHA1 hash of the input buffer. The input buffer
+// must be a null-terminated string.
+nsresult Hash(const char* buf, nsACString& hash) {
+  nsresult rv;
+
+  nsCOMPtr<nsICryptoHash> hasher =
+      do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = hasher->Init(nsICryptoHash::SHA1);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = hasher->Update(reinterpret_cast<unsigned const char*>(buf), strlen(buf));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = hasher->Finish(true, hash);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+}  // unnamed namespace
+
+// We only treat 3xx responses as redirects if they have a Location header and
+// the status code is in a whitelist.
+bool nsHttpChannel::WillRedirect(const nsHttpResponseHead& response) {
+  return IsRedirectStatus(response.Status()) &&
+         response.HasHeader(nsHttp::Location);
+}
+
+nsresult StoreAuthorizationMetaData(nsICacheEntry* entry,
+                                    nsHttpRequestHead* requestHead);
+
+class MOZ_STACK_CLASS AutoRedirectVetoNotifier {
+ public:
+  explicit AutoRedirectVetoNotifier(nsHttpChannel* channel, nsresult& aRv)
+      : mChannel(channel), mRv(aRv) {
+    if (mChannel->LoadHasAutoRedirectVetoNotifier()) {
+      MOZ_CRASH("Nested AutoRedirectVetoNotifier on the stack");
+      mChannel = nullptr;
+      return;
+    }
+
+    mChannel->StoreHasAutoRedirectVetoNotifier(true);
+  }
+  ~AutoRedirectVetoNotifier() { ReportRedirectResult(mRv); }
+  void RedirectSucceeded() { ReportRedirectResult(NS_OK); }
+
+ private:
+  nsHttpChannel* mChannel;
+  bool mCalledReport = false;
+  nsresult& mRv;
+  void ReportRedirectResult(nsresult aRv);
+};
+
+void AutoRedirectVetoNotifier::ReportRedirectResult(nsresult aRv) {
+  if (!mChannel) return;
+
+  if (mCalledReport) {
+    return;
+  }
+  mCalledReport = true;
+
+  mChannel->mRedirectChannel = nullptr;
+
+  if (NS_SUCCEEDED(aRv)) {
+    mChannel->RemoveAsNonTailRequest();
+  }
+
+  nsCOMPtr<nsIRedirectResultListener> vetoHook;
+  NS_QueryNotificationCallbacks(mChannel, NS_GET_IID(nsIRedirectResultListener),
+                                getter_AddRefs(vetoHook));
+
+  nsHttpChannel* channel = mChannel;
+  mChannel = nullptr;
+
+  if (vetoHook) vetoHook->OnRedirectResult(aRv);
+
+  // Drop after the notification
+  channel->StoreHasAutoRedirectVetoNotifier(false);
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <public>
+//-----------------------------------------------------------------------------
+
+nsHttpChannel::nsHttpChannel() : HttpAsyncAborter<nsHttpChannel>(this) {
+  LOG(("Creating nsHttpChannel [this=%p]\n", this));
+  mChannelCreationTime = PR_Now();
+  mChannelCreationTimestamp = TimeStamp::Now();
+}
+
+nsHttpChannel::~nsHttpChannel() {
+  LOG(("Destroying nsHttpChannel [this=%p]\n", this));
+
+  if (LOG_ENABLED()) {
+    nsCString webExtension;
+    this->GetPropertyAsACString(u"cancelledByExtension"_ns, webExtension);
+    if (!webExtension.IsEmpty()) {
+      LOG(("channel [%p] cancelled by extension [id=%s]", this,
+           webExtension.get()));
+    }
+  }
+
+  if (mAuthProvider) {
+    DebugOnly<nsresult> rv = mAuthProvider->Disconnect(NS_ERROR_ABORT);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+
+  ReleaseMainThreadOnlyReferences();
+  if (gHttpHandler) {
+    gHttpHandler->RemoveHttpChannel(mChannelId);
+  }
+}
+
+void nsHttpChannel::ReleaseMainThreadOnlyReferences() {
+  if (NS_IsMainThread()) {
+    // Already on main thread, let dtor to
+    // take care of releasing references
+    return;
+  }
+
+  nsTArray<nsCOMPtr<nsISupports>> arrayToRelease;
+  arrayToRelease.AppendElement(mAuthProvider.forget());
+  arrayToRelease.AppendElement(mRedirectChannel.forget());
+  arrayToRelease.AppendElement(mPreflightChannel.forget());
+  arrayToRelease.AppendElement(mDNSPrefetch.forget());
+
+  MOZ_DIAGNOSTIC_ASSERT(
+      !mEarlyHintObserver,
+      "Early hint observer should have been released in ReleaseListeners()");
+  arrayToRelease.AppendElement(mEarlyHintObserver.forget());
+  MOZ_DIAGNOSTIC_ASSERT(
+      !mChannelClassifier,
+      "Channel classifier should have been released in ReleaseListeners()");
+  arrayToRelease.AppendElement(
+      mChannelClassifier.forget().downcast<nsIURIClassifierCallback>());
+  MOZ_DIAGNOSTIC_ASSERT(
+      !mWarningReporter,
+      "Warning reporter should have been released in ReleaseListeners()");
+  arrayToRelease.AppendElement(mWarningReporter.forget());
+
+  NS_DispatchToMainThread(new ProxyReleaseRunnable(std::move(arrayToRelease)));
+}
+
+nsresult nsHttpChannel::Init(nsIURI* uri, uint32_t caps, nsProxyInfo* proxyInfo,
+                             uint32_t proxyResolveFlags, nsIURI* proxyURI,
+                             uint64_t channelId,
+                             ExtContentPolicyType aContentPolicyType,
+                             nsILoadInfo* aLoadInfo) {
+  nsresult rv =
+      HttpBaseChannel::Init(uri, caps, proxyInfo, proxyResolveFlags, proxyURI,
+                            channelId, aContentPolicyType, aLoadInfo);
+  if (NS_FAILED(rv)) return rv;
+
+  LOG1(("nsHttpChannel::Init [this=%p]\n", this));
+
+  return rv;
+}
+
+nsresult nsHttpChannel::AddSecurityMessage(const nsAString& aMessageTag,
+                                           const nsAString& aMessageCategory) {
+  if (mWarningReporter) {
+    return mWarningReporter->ReportSecurityMessage(aMessageTag,
+                                                   aMessageCategory);
+  }
+  return HttpBaseChannel::AddSecurityMessage(aMessageTag, aMessageCategory);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::LogBlockedCORSRequest(const nsAString& aMessage,
+                                     const nsACString& aCategory,
+                                     bool aIsWarning) {
+  if (mWarningReporter) {
+    return mWarningReporter->LogBlockedCORSRequest(aMessage, aCategory,
+                                                   aIsWarning);
+  }
+  return NS_ERROR_UNEXPECTED;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::LogMimeTypeMismatch(const nsACString& aMessageName,
+                                   bool aWarning, const nsAString& aURL,
+                                   const nsAString& aContentType) {
+  if (mWarningReporter) {
+    return mWarningReporter->LogMimeTypeMismatch(aMessageName, aWarning, aURL,
+                                                 aContentType);
+  }
+  return NS_ERROR_UNEXPECTED;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <private>
+//-----------------------------------------------------------------------------
+
+nsresult nsHttpChannel::PrepareToConnect() {
+  LOG(("nsHttpChannel::PrepareToConnect [this=%p]\n", this));
+
+  // notify "http-on-modify-request-before-cookies" observers
+  gHttpHandler->OnModifyRequestBeforeCookies(this);
+
+  AddCookiesToRequest();
+
+#ifdef XP_WIN
+
+  auto prefEnabledForCurrentContainer = [&]() {
+    uint32_t containerId = mLoadInfo->GetOriginAttributes().mUserContextId;
+    // Make sure that the default container ID is 0
+    static_assert(nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID == 0);
+    nsPrintfCString prefName("network.http.windows-sso.container-enabled.%u",
+                             containerId);
+
+    bool enabled = false;
+    Preferences::GetBool(prefName.get(), &enabled);
+
+    LOG(("Pref for %s is %d\n", prefName.get(), enabled));
+
+    return enabled;
+  };
+
+  // If Windows 10 SSO is enabled, we potentially add auth information to
+  // secure top level loads (DOCUMENTs) and iframes (SUBDOCUMENTs) that
+  // aren't anonymous or private browsing.
+  if (StaticPrefs::network_http_windows_sso_enabled() &&
+      mURI->SchemeIs("https") && !(mLoadFlags & LOAD_ANONYMOUS) &&
+      !mPrivateBrowsing) {
+    ExtContentPolicyType type = mLoadInfo->GetExternalContentPolicyType();
+    if ((type == ExtContentPolicy::TYPE_DOCUMENT ||
+         type == ExtContentPolicy::TYPE_SUBDOCUMENT) &&
+        prefEnabledForCurrentContainer()) {
+      AddWindowsSSO(this);
+    }
+  }
+#endif
+
+  // notify "http-on-modify-request" observers
+  CallOnModifyRequestObservers();
+
+  return CallOrWaitForResume(
+      [](auto* self) { return self->OnBeforeConnect(); });
+}
+
+void nsHttpChannel::HandleContinueCancellingByURLClassifier(
+    nsresult aErrorCode) {
+  MOZ_ASSERT(
+      UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode));
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(
+        ("Waiting until resume HandleContinueCancellingByURLClassifier "
+         "[this=%p]\n",
+         this));
+    mCallOnResume = [aErrorCode](nsHttpChannel* self) {
+      self->HandleContinueCancellingByURLClassifier(aErrorCode);
+      return NS_OK;
+    };
+    return;
+  }
+
+  LOG(("nsHttpChannel::HandleContinueCancellingByURLClassifier [this=%p]\n",
+       this));
+  ContinueCancellingByURLClassifier(aErrorCode);
+}
+
+nsresult nsHttpChannel::OnBeforeConnect() {
+  nsresult rv;
+
+  // Check if request was cancelled during suspend AFTER on-modify-request
+  if (mCanceled) {
+    return mStatus;
+  }
+
+  // Check to see if we should redirect this channel elsewhere by
+  // nsIHttpChannel.redirectTo API request
+  if (mAPIRedirectToURI) {
+    return AsyncCall(&nsHttpChannel::HandleAsyncAPIRedirect);
+  }
+
+  // Check to see if we should redirect this channel to the unstripped URI. To
+  // revert the query stripping if the loading channel is in the content
+  // blocking allow list.
+  if (ContentBlockingAllowList::Check(this)) {
+    nsCOMPtr<nsIURI> unstrippedURI;
+    mLoadInfo->GetUnstrippedURI(getter_AddRefs(unstrippedURI));
+
+    if (unstrippedURI) {
+      return AsyncCall(&nsHttpChannel::HandleAsyncRedirectToUnstrippedURI);
+    }
+  }
+
+  // Note that we are only setting the "Upgrade-Insecure-Requests" request
+  // header for *all* navigational requests instead of all requests as
+  // defined in the spec, see:
+  // https://www.w3.org/TR/upgrade-insecure-requests/#preference
+  ExtContentPolicyType type = mLoadInfo->GetExternalContentPolicyType();
+
+  if (type == ExtContentPolicy::TYPE_DOCUMENT ||
+      type == ExtContentPolicy::TYPE_SUBDOCUMENT) {
+    rv = SetRequestHeader("Upgrade-Insecure-Requests"_ns, "1"_ns, false);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  SecFetch::AddSecFetchHeader(this);
+
+  nsCOMPtr<nsIPrincipal> resultPrincipal;
+  if (!mURI->SchemeIs("https")) {
+    nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal(
+        this, getter_AddRefs(resultPrincipal));
+  }
+
+  // Check if we already know about the HSTS status of the host
+  nsISiteSecurityService* sss = gHttpHandler->GetSSService();
+  NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
+  bool isSecureURI;
+  OriginAttributes originAttributes;
+  if (!StoragePrincipalHelper::GetOriginAttributesForHSTS(this,
+                                                          originAttributes)) {
+    return NS_ERROR_FAILURE;
+  }
+  rv = sss->IsSecureURI(mURI, originAttributes, &isSecureURI);
+  NS_ENSURE_SUCCESS(rv, rv);
+  // Save that on the loadInfo so it can later be consumed by SecurityInfo.jsm
+  mLoadInfo->SetHstsStatus(isSecureURI);
+
+  // At this point it is no longer possible to call
+  // HttpBaseChannel::UpgradeToSecure.
+  StoreUpgradableToSecure(false);
+  bool shouldUpgrade = LoadUpgradeToSecure();
+  if (mURI->SchemeIs("http")) {
+    OriginAttributes originAttributes;
+    if (!StoragePrincipalHelper::GetOriginAttributesForHSTS(this,
+                                                            originAttributes)) {
+      return NS_ERROR_FAILURE;
+    }
+
+    if (!shouldUpgrade) {
+      // Make sure http channel is released on main thread.
+      // See bug 1539148 for details.
+      nsMainThreadPtrHandle<nsHttpChannel> self(
+          new nsMainThreadPtrHolder<nsHttpChannel>(
+              "nsHttpChannel::OnBeforeConnect::self", this));
+      auto resultCallback = [self(self)](bool aResult, nsresult aStatus) {
+        MOZ_ASSERT(NS_IsMainThread());
+
+        nsresult rv = self->MaybeUseHTTPSRRForUpgrade(aResult, aStatus);
+        if (NS_FAILED(rv)) {
+          self->CloseCacheEntry(false);
+          Unused << self->AsyncAbort(rv);
+        }
+      };
+
+      bool willCallback = false;
+      rv = NS_ShouldSecureUpgrade(
+          mURI, mLoadInfo, resultPrincipal, LoadAllowSTS(), originAttributes,
+          shouldUpgrade, std::move(resultCallback), willCallback);
+      // If the request gets upgraded because of the HTTPS-Only mode, but no
+      // event listener has been registered so far, we want to do that here.
+      uint32_t httpOnlyStatus = mLoadInfo->GetHttpsOnlyStatus();
+      if (httpOnlyStatus &
+          nsILoadInfo::HTTPS_ONLY_UPGRADED_LISTENER_NOT_REGISTERED) {
+        RefPtr<nsHTTPSOnlyStreamListener> httpsOnlyListener =
+            new nsHTTPSOnlyStreamListener(mListener, mLoadInfo);
+        mListener = httpsOnlyListener;
+
+        httpOnlyStatus ^=
+            nsILoadInfo::HTTPS_ONLY_UPGRADED_LISTENER_NOT_REGISTERED;
+        httpOnlyStatus |= nsILoadInfo::HTTPS_ONLY_UPGRADED_LISTENER_REGISTERED;
+        mLoadInfo->SetHttpsOnlyStatus(httpOnlyStatus);
+      }
+      LOG(
+          ("nsHttpChannel::OnBeforeConnect "
+           "[this=%p willCallback=%d rv=%" PRIx32 "]\n",
+           this, willCallback, static_cast<uint32_t>(rv)));
+
+      if (NS_FAILED(rv) || MOZ_UNLIKELY(willCallback)) {
+        return rv;
+      }
+    }
+  }
+
+  return MaybeUseHTTPSRRForUpgrade(shouldUpgrade, NS_OK);
+}
+
+nsresult nsHttpChannel::MaybeUseHTTPSRRForUpgrade(bool aShouldUpgrade,
+                                                  nsresult aStatus) {
+  if (NS_FAILED(aStatus)) {
+    return aStatus;
+  }
+
+  if (mURI->SchemeIs("https") || aShouldUpgrade || !LoadUseHTTPSSVC()) {
+    return ContinueOnBeforeConnect(aShouldUpgrade, aStatus);
+  }
+
+  auto shouldSkipUpgradeWithHTTPSRR = [&]() -> bool {
+    // Skip using HTTPS RR to upgrade when this is not a top-level load and the
+    // loading principal is http.
+    if ((mLoadInfo->GetExternalContentPolicyType() !=
+         ExtContentPolicy::TYPE_DOCUMENT) &&
+        (mLoadInfo->GetLoadingPrincipal() &&
+         mLoadInfo->GetLoadingPrincipal()->SchemeIs("http"))) {
+      return true;
+    }
+
+    nsAutoCString uriHost;
+    mURI->GetAsciiHost(uriHost);
+
+    if (gHttpHandler->IsHostExcludedForHTTPSRR(uriHost)) {
+      return true;
+    }
+
+    if (nsHTTPSOnlyUtils::IsUpgradeDowngradeEndlessLoop(
+            mURI, mLoadInfo,
+            {nsHTTPSOnlyUtils::UpgradeDowngradeEndlessLoopOptions::
+                 EnforceForHTTPSRR})) {
+      // Add the host to a excluded list because:
+      // 1. We don't need to do the same check again.
+      // 2. Other subresources in the same host will be also excluded.
+      gHttpHandler->ExcludeHTTPSRRHost(uriHost);
+      LOG(("[%p] skip HTTPS upgrade for host [%s]", this, uriHost.get()));
+      return true;
+    }
+
+    return false;
+  };
+
+  if (shouldSkipUpgradeWithHTTPSRR()) {
+    StoreUseHTTPSSVC(false);
+    // If the website does not want to use HTTPS RR, we should set
+    // NS_HTTP_DISALLOW_HTTPS_RR. This is for avoiding HTTPS RR being used by
+    // the transaction.
+    mCaps |= NS_HTTP_DISALLOW_HTTPS_RR;
+    return ContinueOnBeforeConnect(aShouldUpgrade, aStatus);
+  }
+
+  if (mHTTPSSVCRecord.isSome()) {
+    LOG((
+        "nsHttpChannel::MaybeUseHTTPSRRForUpgrade [%p] mHTTPSSVCRecord is some",
+        this));
+    StoreWaitHTTPSSVCRecord(false);
+    bool hasHTTPSRR = (mHTTPSSVCRecord.ref() != nullptr);
+    return ContinueOnBeforeConnect(hasHTTPSRR, aStatus, hasHTTPSRR);
+  }
+
+  auto dnsStrategy = GetProxyDNSStrategy();
+  if (!(dnsStrategy & DNS_PREFETCH_ORIGIN)) {
+    return ContinueOnBeforeConnect(aShouldUpgrade, aStatus);
+  }
+
+  LOG(("nsHttpChannel::MaybeUseHTTPSRRForUpgrade [%p] wait for HTTPS RR",
+       this));
+
+  OriginAttributes originAttributes;
+  StoragePrincipalHelper::GetOriginAttributesForHTTPSRR(this, originAttributes);
+
+  RefPtr<nsDNSPrefetch> resolver =
+      new nsDNSPrefetch(mURI, originAttributes, nsIRequest::GetTRRMode());
+  nsWeakPtr weakPtrThis(
+      do_GetWeakReference(static_cast<nsIHttpChannel*>(this)));
+  nsresult rv = resolver->FetchHTTPSSVC(
+      mCaps & NS_HTTP_REFRESH_DNS, !LoadUseHTTPSSVC(),
+      [weakPtrThis](nsIDNSHTTPSSVCRecord* aRecord) {
+        nsCOMPtr<nsIHttpChannel> channel = do_QueryReferent(weakPtrThis);
+        RefPtr<nsHttpChannel> httpChannelImpl = do_QueryObject(channel);
+        if (httpChannelImpl) {
+          httpChannelImpl->OnHTTPSRRAvailable(aRecord);
+        }
+      });
+  if (NS_FAILED(rv)) {
+    LOG(("  FetchHTTPSSVC failed with 0x%08" PRIx32,
+         static_cast<uint32_t>(rv)));
+    return ContinueOnBeforeConnect(aShouldUpgrade, aStatus);
+  }
+
+  StoreWaitHTTPSSVCRecord(true);
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::ContinueOnBeforeConnect(bool aShouldUpgrade,
+                                                nsresult aStatus,
+                                                bool aUpgradeWithHTTPSRR) {
+  LOG(
+      ("nsHttpChannel::ContinueOnBeforeConnect "
+       "[this=%p aShouldUpgrade=%d rv=%" PRIx32 "]\n",
+       this, aShouldUpgrade, static_cast<uint32_t>(aStatus)));
+
+  MOZ_ASSERT(!LoadWaitHTTPSSVCRecord());
+
+  if (NS_FAILED(aStatus)) {
+    return aStatus;
+  }
+
+  if (aShouldUpgrade && !mURI->SchemeIs("https")) {
+    Telemetry::Accumulate(Telemetry::HTTPS_UPGRADE_WITH_HTTPS_RR,
+                          aUpgradeWithHTTPSRR);
+    return AsyncCall(&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
+  }
+
+  // ensure that we are using a valid hostname
+  if (!net_IsValidHostName(nsDependentCString(mConnectionInfo->Origin()))) {
+    return NS_ERROR_UNKNOWN_HOST;
+  }
+
+  if (mUpgradeProtocolCallback) {
+    // Websockets can run over HTTP/2, but other upgrades can't.
+    if (mUpgradeProtocol.EqualsLiteral("websocket") &&
+        StaticPrefs::network_http_http2_websockets()) {
+      // Need to tell the conn manager that we're ok with http/2 even with
+      // the allow keepalive bit not set. That bit needs to stay off,
+      // though, in case we end up having to fallback to http/1.1 (where
+      // we absolutely do want to disable keepalive).
+      mCaps |= NS_HTTP_ALLOW_SPDY_WITHOUT_KEEPALIVE;
+    } else {
+      mCaps |= NS_HTTP_DISALLOW_SPDY;
+    }
+    // Upgrades cannot use HTTP/3.
+    mCaps |= NS_HTTP_DISALLOW_HTTP3;
+    // Because NS_HTTP_STICKY_CONNECTION breaks HTTPS RR fallabck mecnahism, we
+    // can not use HTTPS RR for upgrade requests.
+    mCaps |= NS_HTTP_DISALLOW_HTTPS_RR;
+  }
+
+  if (LoadIsTRRServiceChannel()) {
+    mCaps |= NS_HTTP_LARGE_KEEPALIVE;
+    mCaps |= NS_HTTP_DISALLOW_HTTPS_RR;
+  }
+
+  mCaps |= NS_HTTP_TRR_FLAGS_FROM_MODE(nsIRequest::GetTRRMode());
+
+  // Finalize ConnectionInfo flags before SpeculativeConnect
+  mConnectionInfo->SetAnonymous((mLoadFlags & LOAD_ANONYMOUS) != 0);
+  mConnectionInfo->SetPrivate(mPrivateBrowsing);
+  mConnectionInfo->SetNoSpdy(mCaps & NS_HTTP_DISALLOW_SPDY);
+  mConnectionInfo->SetBeConservative((mCaps & NS_HTTP_BE_CONSERVATIVE) ||
+                                     LoadBeConservative());
+  mConnectionInfo->SetTlsFlags(mTlsFlags);
+  mConnectionInfo->SetIsTrrServiceChannel(LoadIsTRRServiceChannel());
+  mConnectionInfo->SetTRRMode(nsIRequest::GetTRRMode());
+  mConnectionInfo->SetIPv4Disabled(mCaps & NS_HTTP_DISABLE_IPV4);
+  mConnectionInfo->SetIPv6Disabled(mCaps & NS_HTTP_DISABLE_IPV6);
+  mConnectionInfo->SetAnonymousAllowClientCert(
+      (mLoadFlags & LOAD_ANONYMOUS_ALLOW_CLIENT_CERT) != 0);
+
+  // notify "http-on-before-connect" observers
+  gHttpHandler->OnBeforeConnect(this);
+
+  return CallOrWaitForResume([](auto* self) { return self->Connect(); });
+}
+
+nsresult nsHttpChannel::Connect() {
+  LOG(("nsHttpChannel::Connect [this=%p]\n", this));
+
+  // Don't allow resuming when cache must be used
+  if (LoadResuming() && (mLoadFlags & LOAD_ONLY_FROM_CACHE)) {
+    LOG(("Resuming from cache is not supported yet"));
+    return NS_ERROR_DOCUMENT_NOT_CACHED;
+  }
+
+  if (ShouldIntercept()) {
+    return RedirectToInterceptedChannel();
+  }
+
+  // Step 8.18 of HTTP-network-or-cache fetch
+  // https://fetch.spec.whatwg.org/#http-network-or-cache-fetch
+  nsAutoCString rangeVal;
+  if (NS_SUCCEEDED(GetRequestHeader("Range"_ns, rangeVal))) {
+    SetRequestHeader("Accept-Encoding"_ns, "identity"_ns, true);
+  }
+
+  bool isTrackingResource = IsThirdPartyTrackingResource();
+  LOG(("nsHttpChannel %p tracking resource=%d, cos=%lu, inc=%d", this,
+       isTrackingResource, mClassOfService.Flags(),
+       mClassOfService.Incremental()));
+
+  if (isTrackingResource) {
+    AddClassFlags(nsIClassOfService::Tail);
+  }
+
+  if (WaitingForTailUnblock()) {
+    MOZ_DIAGNOSTIC_ASSERT(!mOnTailUnblock);
+    mOnTailUnblock = &nsHttpChannel::ConnectOnTailUnblock;
+    return NS_OK;
+  }
+
+  return ConnectOnTailUnblock();
+}
+
+nsresult nsHttpChannel::ConnectOnTailUnblock() {
+  nsresult rv;
+
+  LOG(("nsHttpChannel::ConnectOnTailUnblock [this=%p]\n", this));
+
+  // Consider opening a TCP connection right away.
+  SpeculativeConnect();
+
+  // open a cache entry for this channel...
+  rv = OpenCacheEntry(mURI->SchemeIs("https"));
+
+  // do not continue if asyncOpenCacheEntry is in progress
+  if (AwaitingCacheCallbacks()) {
+    LOG(("nsHttpChannel::Connect %p AwaitingCacheCallbacks forces async\n",
+         this));
+    MOZ_ASSERT(NS_SUCCEEDED(rv), "Unexpected state");
+
+    if (mNetworkTriggered && mWaitingForProxy) {
+      // Someone has called TriggerNetwork(), meaning we are racing the
+      // network with the cache.
+      mWaitingForProxy = false;
+      return ContinueConnect();
+    }
+
+    return NS_OK;
+  }
+
+  if (NS_FAILED(rv)) {
+    LOG(("OpenCacheEntry failed [rv=%" PRIx32 "]\n",
+         static_cast<uint32_t>(rv)));
+    // if this channel is only allowed to pull from the cache, then
+    // we must fail if we were unable to open a cache entry.
+    if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+      return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+    // otherwise, let's just proceed without using the cache.
+  }
+
+  if (mRaceCacheWithNetwork && ((mCacheEntry && !mCachedContentIsValid &&
+                                 (mDidReval || LoadCachedContentIsPartial())) ||
+                                mIgnoreCacheEntry)) {
+    // We won't send the conditional request because the unconditional
+    // request was already sent (see bug 1377223).
+    AccumulateCategorical(
+        Telemetry::LABELS_NETWORK_RACE_CACHE_VALIDATION::NotSent);
+  }
+
+  // When racing, if OnCacheEntryAvailable is called before AsyncOpenURI
+  // returns, then we may not have started reading from the cache.
+  // If the content is valid, we should attempt to do so, as technically the
+  // cache has won the race.
+  if (mRaceCacheWithNetwork && mCachedContentIsValid) {
+    Unused << ReadFromCache(true);
+  }
+
+  return TriggerNetwork();
+}
+
+nsresult nsHttpChannel::ContinueConnect() {
+  // If we need to start a CORS preflight, do it now!
+  // Note that it is important to do this before the early returns below.
+  if (!LoadIsCorsPreflightDone() && LoadRequireCORSPreflight()) {
+    MOZ_ASSERT(!mPreflightChannel);
+    nsresult rv = nsCORSListenerProxy::StartCORSPreflight(
+        this, this, mUnsafeHeaders, getter_AddRefs(mPreflightChannel));
+    return rv;
+  }
+
+  MOZ_RELEASE_ASSERT(!LoadRequireCORSPreflight() || LoadIsCorsPreflightDone(),
+                     "CORS preflight must have been finished by the time we "
+                     "do the rest of ContinueConnect");
+
+  // we may or may not have a cache entry at this point
+  if (mCacheEntry) {
+    // read straight from the cache if possible...
+    if (mCachedContentIsValid) {
+      nsRunnableMethod<nsHttpChannel>* event = nullptr;
+      nsresult rv;
+      if (!LoadCachedContentIsPartial()) {
+        rv = AsyncCall(&nsHttpChannel::AsyncOnExamineCachedResponse, &event);
+        if (NS_FAILED(rv)) {
+          LOG(("  AsyncCall failed (%08x)", static_cast<uint32_t>(rv)));
+        }
+      }
+      rv = ReadFromCache(true);
+      if (NS_FAILED(rv) && event) {
+        event->Revoke();
+      }
+
+      AccumulateCacheHitTelemetry(kCacheHit, this);
+      mCacheDisposition = kCacheHit;
+
+      return rv;
+    }
+    if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+      // the cache contains the requested resource, but it must be
+      // validated before we can reuse it.  since we are not allowed
+      // to hit the net, there's nothing more to do.  the document
+      // is effectively not in the cache.
+      LOG(("  !mCachedContentIsValid && mLoadFlags & LOAD_ONLY_FROM_CACHE"));
+      return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+  } else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+    LOG(("  !mCacheEntry && mLoadFlags & LOAD_ONLY_FROM_CACHE"));
+    return NS_ERROR_DOCUMENT_NOT_CACHED;
+  }
+
+  if (mLoadFlags & LOAD_NO_NETWORK_IO) {
+    LOG(("  mLoadFlags & LOAD_NO_NETWORK_IO"));
+    return NS_ERROR_DOCUMENT_NOT_CACHED;
+  }
+
+  // hit the net...
+  return DoConnect();
+}
+
+nsresult nsHttpChannel::DoConnect(HttpTransactionShell* aTransWithStickyConn) {
+  LOG(("nsHttpChannel::DoConnect [this=%p]\n", this));
+
+  if (!mDNSBlockingPromise.IsEmpty()) {
+    LOG(("  waiting for DNS prefetch"));
+
+    // Transaction is passed only from auth retry for which we will definitely
+    // not block on DNS to alter the origin server name for IP; it has already
+    // been done.
+    MOZ_ASSERT(!aTransWithStickyConn);
+    MOZ_ASSERT(mDNSBlockingThenable);
+
+    nsCOMPtr<nsISerialEventTarget> target(do_GetMainThread());
+    RefPtr<nsHttpChannel> self(this);
+    mDNSBlockingThenable->Then(
+        target, __func__,
+        [self](const nsCOMPtr<nsIDNSRecord>& aRec) {
+          nsresult rv = self->DoConnectActual(nullptr);
+          if (NS_FAILED(rv)) {
+            self->CloseCacheEntry(false);
+            Unused << self->AsyncAbort(rv);
+          }
+        },
+        [self](nsresult err) {
+          self->CloseCacheEntry(false);
+          Unused << self->AsyncAbort(err);
+        });
+
+    // The connection will continue when the promise is resolved in
+    // OnLookupComplete.
+    return NS_OK;
+  }
+
+  return DoConnectActual(aTransWithStickyConn);
+}
+
+nsresult nsHttpChannel::DoConnectActual(
+    HttpTransactionShell* aTransWithStickyConn) {
+  LOG(("nsHttpChannel::DoConnectActual [this=%p, aTransWithStickyConn=%p]\n",
+       this, aTransWithStickyConn));
+
+  nsresult rv = SetupTransaction();
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  if (aTransWithStickyConn) {
+    rv = gHttpHandler->InitiateTransactionWithStickyConn(
+        mTransaction, mPriority, aTransWithStickyConn);
+  } else {
+    rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
+  }
+
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  rv = mTransaction->AsyncRead(this, getter_AddRefs(mTransactionPump));
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  uint32_t suspendCount = mSuspendCount;
+  if (LoadAsyncResumePending()) {
+    LOG(
+        ("  Suspend()'ing transaction pump once because of async resume pending"
+         ", sc=%u, pump=%p, this=%p",
+         suspendCount, mTransactionPump.get(), this));
+    ++suspendCount;
+  }
+  while (suspendCount--) {
+    mTransactionPump->Suspend();
+  }
+
+  return NS_OK;
+}
+
+void nsHttpChannel::SpeculativeConnect() {
+  // Before we take the latency hit of dealing with the cache, try and
+  // get the TCP (and SSL) handshakes going so they can overlap.
+
+  // don't speculate if we are offline, when doing http upgrade (i.e.
+  // websockets bootstrap), or if we can't do keep-alive (because then we
+  // couldn't reuse the speculative connection anyhow).
+  if (gIOService->IsOffline() || mUpgradeProtocolCallback ||
+      !(mCaps & NS_HTTP_ALLOW_KEEPALIVE)) {
+    return;
+  }
+
+  // LOAD_ONLY_FROM_CACHE and LOAD_NO_NETWORK_IO must not hit network.
+  // LOAD_FROM_CACHE is unlikely to hit network, so skip preconnects for it.
+  if (mLoadFlags &
+      (LOAD_ONLY_FROM_CACHE | LOAD_FROM_CACHE | LOAD_NO_NETWORK_IO)) {
+    return;
+  }
+
+  if (LoadAllowStaleCacheContent()) {
+    return;
+  }
+
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         getter_AddRefs(callbacks));
+  if (!callbacks) return;
+
+  Unused << gHttpHandler->SpeculativeConnect(
+      mConnectionInfo, callbacks,
+      mCaps & (NS_HTTP_DISALLOW_SPDY | NS_HTTP_TRR_MODE_MASK |
+               NS_HTTP_DISABLE_IPV4 | NS_HTTP_DISABLE_IPV6 |
+               NS_HTTP_DISALLOW_HTTP3 | NS_HTTP_REFRESH_DNS),
+      gHttpHandler->EchConfigEnabled());
+}
+
+void nsHttpChannel::DoNotifyListenerCleanup() {
+  // We don't need this info anymore
+  CleanRedirectCacheChainIfNecessary();
+}
+
+void nsHttpChannel::ReleaseListeners() {
+  HttpBaseChannel::ReleaseListeners();
+  mChannelClassifier = nullptr;
+  mWarningReporter = nullptr;
+  mEarlyHintObserver = nullptr;
+  mWebTransportSessionEventListener = nullptr;
+
+  for (StreamFilterRequest& request : mStreamFilterRequests) {
+    request.mPromise->Reject(false, __func__);
+  }
+  mStreamFilterRequests.Clear();
+}
+
+void nsHttpChannel::DoAsyncAbort(nsresult aStatus) {
+  Unused << AsyncAbort(aStatus);
+}
+
+void nsHttpChannel::HandleAsyncRedirect() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume to do async redirect [this=%p]\n", this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->HandleAsyncRedirect();
+      return NS_OK;
+    };
+    return;
+  }
+
+  nsresult rv = NS_OK;
+
+  LOG(("nsHttpChannel::HandleAsyncRedirect [this=%p]\n", this));
+
+  // since this event is handled asynchronously, it is possible that this
+  // channel could have been canceled, in which case there would be no point
+  // in processing the redirect.
+  if (NS_SUCCEEDED(mStatus)) {
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
+    rv = AsyncProcessRedirection(mResponseHead->Status());
+    if (NS_FAILED(rv)) {
+      PopRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
+      // TODO: if !DoNotRender3xxBody(), render redirect body instead.
+      // But first we need to cache 3xx bodies (bug 748510)
+      rv = ContinueHandleAsyncRedirect(rv);
+      MOZ_ASSERT(NS_SUCCEEDED(rv));
+    }
+  } else {
+    rv = ContinueHandleAsyncRedirect(mStatus);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+}
+
+nsresult nsHttpChannel::ContinueHandleAsyncRedirect(nsresult rv) {
+  if (NS_FAILED(rv)) {
+    // If AsyncProcessRedirection fails, then we have to send out the
+    // OnStart/OnStop notifications.
+    LOG(("ContinueHandleAsyncRedirect got failure result [rv=%" PRIx32 "]\n",
+         static_cast<uint32_t>(rv)));
+
+    bool redirectsEnabled = !mLoadInfo->GetDontFollowRedirects();
+
+    if (redirectsEnabled) {
+      // TODO: stop failing original channel if redirect vetoed?
+      mStatus = rv;
+
+      DoNotifyListener();
+
+      // Blow away cache entry if we couldn't process the redirect
+      // for some reason (the cache entry might be corrupt).
+      if (mCacheEntry) {
+        mCacheEntry->AsyncDoom(nullptr);
+      }
+    } else {
+      DoNotifyListener();
+    }
+  }
+
+  CloseCacheEntry(true);
+
+  StoreIsPending(false);
+
+  if (mLoadGroup) mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+
+  return NS_OK;
+}
+
+void nsHttpChannel::HandleAsyncNotModified() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume to do async not-modified [this=%p]\n", this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->HandleAsyncNotModified();
+      return NS_OK;
+    };
+    return;
+  }
+
+  LOG(("nsHttpChannel::HandleAsyncNotModified [this=%p]\n", this));
+
+  DoNotifyListener();
+
+  CloseCacheEntry(false);
+
+  StoreIsPending(false);
+
+  if (mLoadGroup) mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+}
+
+nsresult nsHttpChannel::SetupTransaction() {
+  LOG(("nsHttpChannel::SetupTransaction [this=%p, cos=%lu, inc=%d prio=%d]\n",
+       this, mClassOfService.Flags(), mClassOfService.Incremental(),
+       mPriority));
+
+  NS_ENSURE_TRUE(!mTransaction, NS_ERROR_ALREADY_INITIALIZED);
+
+  nsresult rv;
+
+  mozilla::MutexAutoLock lock(mRCWNLock);
+
+  // If we're racing cache with network, conditional or byte range header
+  // could be added in OnCacheEntryCheck. We cannot send conditional request
+  // without having the entry, so we need to remove the headers here and
+  // ignore the cache entry in OnCacheEntryAvailable.
+  if (mRaceCacheWithNetwork && AwaitingCacheCallbacks()) {
+    if (mDidReval) {
+      LOG(("  Removing conditional request headers"));
+      UntieValidationRequest();
+      mDidReval = false;
+      mIgnoreCacheEntry = true;
+    }
+
+    if (LoadCachedContentIsPartial()) {
+      LOG(("  Removing byte range request headers"));
+      UntieByteRangeRequest();
+      StoreCachedContentIsPartial(false);
+      mIgnoreCacheEntry = true;
+    }
+
+    if (mIgnoreCacheEntry) {
+      mAvailableCachedAltDataType.Truncate();
+      StoreDeliveringAltData(false);
+      mAltDataLength = -1;
+      mCacheInputStream.CloseAndRelease();
+    }
+  }
+
+  StoreUsedNetwork(1);
+
+  if (!LoadAllowSpdy()) {
+    mCaps |= NS_HTTP_DISALLOW_SPDY;
+  }
+  if (!LoadAllowHttp3()) {
+    mCaps |= NS_HTTP_DISALLOW_HTTP3;
+  }
+  if (LoadBeConservative()) {
+    mCaps |= NS_HTTP_BE_CONSERVATIVE;
+  }
+
+  if (mLoadFlags & LOAD_ANONYMOUS_ALLOW_CLIENT_CERT) {
+    mCaps |= NS_HTTP_LOAD_ANONYMOUS_CONNECT_ALLOW_CLIENT_CERT;
+  }
+
+  if (nsContentUtils::ShouldResistFingerprinting(this)) {
+    mCaps |= NS_HTTP_USE_RFP;
+  }
+
+  // Use the URI path if not proxying (transparent proxying such as proxy
+  // CONNECT does not count here). Also figure out what HTTP version to use.
+  nsAutoCString buf, path;
+  nsCString* requestURI;
+
+  // This is the normal e2e H1 path syntax "/index.html"
+  rv = mURI->GetPathQueryRef(path);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // path may contain UTF-8 characters, so ensure that they're escaped.
+  if (NS_EscapeURL(path.get(), path.Length(), esc_OnlyNonASCII | esc_Spaces,
+                   buf)) {
+    requestURI = &buf;
+  } else {
+    requestURI = &path;
+  }
+
+  // trim off the #ref portion if any...
+  int32_t ref1 = requestURI->FindChar('#');
+  if (ref1 != kNotFound) {
+    requestURI->SetLength(ref1);
+  }
+
+  if (mConnectionInfo->UsingConnect() || !mConnectionInfo->UsingHttpProxy()) {
+    mRequestHead.SetVersion(gHttpHandler->HttpVersion());
+  } else {
+    mRequestHead.SetPath(*requestURI);
+
+    // RequestURI should be the absolute uri H1 proxy syntax
+    // "http://foo/index.html" so we will overwrite the relative version in
+    // requestURI
+    rv = mURI->GetUserPass(buf);
+    if (NS_FAILED(rv)) return rv;
+    if (!buf.IsEmpty() && ((strncmp(mSpec.get(), "http:", 5) == 0) ||
+                           strncmp(mSpec.get(), "https:", 6) == 0)) {
+      nsCOMPtr<nsIURI> tempURI = nsIOService::CreateExposableURI(mURI);
+      rv = tempURI->GetAsciiSpec(path);
+      if (NS_FAILED(rv)) return rv;
+      requestURI = &path;
+    } else {
+      requestURI = &mSpec;
+    }
+
+    // trim off the #ref portion if any...
+    int32_t ref2 = requestURI->FindChar('#');
+    if (ref2 != kNotFound) {
+      requestURI->SetLength(ref2);
+    }
+
+    mRequestHead.SetVersion(gHttpHandler->ProxyHttpVersion());
+  }
+
+  mRequestHead.SetRequestURI(*requestURI);
+
+  // set the request time for cache expiration calculations
+  mRequestTime = NowInSeconds();
+  StoreRequestTimeInitialized(true);
+
+  // if doing a reload, force end-to-end
+  if (mLoadFlags & LOAD_BYPASS_CACHE) {
+    // We need to send 'Pragma:no-cache' to inhibit proxy caching even if
+    // no proxy is configured since we might be talking with a transparent
+    // proxy, i.e. one that operates at the network level.  See bug #14772.
+    rv = mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    // If we're configured to speak HTTP/1.1 then also send 'Cache-control:
+    // no-cache'
+    if (mRequestHead.Version() >= HttpVersion::v1_1) {
+      rv = mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "no-cache", true);
+      MOZ_ASSERT(NS_SUCCEEDED(rv));
+    }
+  } else if ((mLoadFlags & VALIDATE_ALWAYS) && !LoadCacheEntryIsWriteOnly()) {
+    // We need to send 'Cache-Control: max-age=0' to force each cache along
+    // the path to the origin server to revalidate its own entry, if any,
+    // with the next cache or server.  See bug #84847.
+    //
+    // If we're configured to speak HTTP/1.0 then just send 'Pragma: no-cache'
+    if (mRequestHead.Version() >= HttpVersion::v1_1) {
+      rv = mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "max-age=0", true);
+    } else {
+      rv = mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
+    }
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+
+  if (LoadResuming()) {
+    char byteRange[32];
+    SprintfLiteral(byteRange, "bytes=%" PRIu64 "-", mStartPos);
+    rv = mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(byteRange));
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+    if (!mEntityID.IsEmpty()) {
+      // Also, we want an error if this resource changed in the meantime
+      // Format of the entity id is: escaped_etag/size/lastmod
+      nsCString::const_iterator start, end, slash;
+      mEntityID.BeginReading(start);
+      mEntityID.EndReading(end);
+      mEntityID.BeginReading(slash);
+
+      if (FindCharInReadable('/', slash, end)) {
+        nsAutoCString ifMatch;
+        rv = mRequestHead.SetHeader(
+            nsHttp::If_Match,
+            NS_UnescapeURL(Substring(start, slash), 0, ifMatch));
+        MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+        ++slash;  // Incrementing, so that searching for '/' won't find
+                  // the same slash again
+      }
+
+      if (FindCharInReadable('/', slash, end)) {
+        rv = mRequestHead.SetHeader(nsHttp::If_Unmodified_Since,
+                                    Substring(++slash, end));
+        MOZ_ASSERT(NS_SUCCEEDED(rv));
+      }
+    }
+  }
+
+  // create wrapper for this channel's notification callbacks
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         getter_AddRefs(callbacks));
+
+  // create the transaction object
+  if (nsIOService::UseSocketProcess()) {
+    if (NS_WARN_IF(!gIOService->SocketProcessReady())) {
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    nsCOMPtr<nsIParentChannel> parentChannel;
+    NS_QueryNotificationCallbacks(this, parentChannel);
+    RefPtr<DocumentLoadListener> documentChannelParent =
+        do_QueryObject(parentChannel);
+    // See HttpTransactionChild::CanSendODAToContentProcessDirectly() and
+    // nsHttpChannel::CallOnStartRequest() for the reason why we need to know if
+    // this is a document load. We only send ODA directly to child process for
+    // non document loads.
+    RefPtr<HttpTransactionParent> transParent =
+        new HttpTransactionParent(!!documentChannelParent);
+    LOG1(("nsHttpChannel %p created HttpTransactionParent %p\n", this,
+          transParent.get()));
+
+    // Since OnStopRequest could be sent to child process from socket process
+    // directly, we need to store these two values in HttpTransactionChild and
+    // forward to child process until HttpTransactionChild::OnStopRequest is
+    // called.
+    transParent->SetRedirectTimestamp(mRedirectStartTimeStamp,
+                                      mRedirectEndTimeStamp);
+
+    SocketProcessParent* socketProcess = SocketProcessParent::GetSingleton();
+    if (socketProcess) {
+      Unused << socketProcess->SendPHttpTransactionConstructor(transParent);
+    }
+
+    mTransaction = transParent;
+  } else {
+    mTransaction = new nsHttpTransaction();
+    LOG1(("nsHttpChannel %p created nsHttpTransaction %p\n", this,
+          mTransaction.get()));
+  }
+
+  // Save the mapping of channel id and the channel. We need this mapping for
+  // nsIHttpActivityObserver.
+  gHttpHandler->AddHttpChannel(mChannelId, ToSupports(this));
+
+  // See bug #466080. Transfer LOAD_ANONYMOUS flag to socket-layer.
+  if (mLoadFlags & LOAD_ANONYMOUS) mCaps |= NS_HTTP_LOAD_ANONYMOUS;
+
+  if (LoadTimingEnabled()) mCaps |= NS_HTTP_TIMING_ENABLED;
+
+  if (mUpgradeProtocolCallback) {
+    rv = mRequestHead.SetHeader(nsHttp::Upgrade, mUpgradeProtocol, false);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    rv = mRequestHead.SetHeaderOnce(nsHttp::Connection, nsHttp::Upgrade.get(),
+                                    true);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    mCaps |= NS_HTTP_STICKY_CONNECTION;
+    mCaps &= ~NS_HTTP_ALLOW_KEEPALIVE;
+  }
+
+  if (mWebTransportSessionEventListener) {
+    mCaps |= NS_HTTP_STICKY_CONNECTION;
+  }
+
+  nsCOMPtr<nsIHttpPushListener> pushListener;
+  NS_QueryNotificationCallbacks(mCallbacks, mLoadGroup,
+                                NS_GET_IID(nsIHttpPushListener),
+                                getter_AddRefs(pushListener));
+  HttpTransactionShell::OnPushCallback pushCallback = nullptr;
+  if (pushListener) {
+    mCaps |= NS_HTTP_ONPUSH_LISTENER;
+    nsWeakPtr weakPtrThis(
+        do_GetWeakReference(static_cast<nsIHttpChannel*>(this)));
+    pushCallback = [weakPtrThis](uint32_t aPushedStreamId,
+                                 const nsACString& aUrl,
+                                 const nsACString& aRequestString,
+                                 HttpTransactionShell* aTransaction) {
+      if (nsCOMPtr<nsIHttpChannel> channel = do_QueryReferent(weakPtrThis)) {
+        return static_cast<nsHttpChannel*>(channel.get())
+            ->OnPush(aPushedStreamId, aUrl, aRequestString, aTransaction);
+      }
+      return NS_ERROR_NOT_AVAILABLE;
+    };
+  }
+
+  EnsureBrowserId();
+  EnsureRequestContext();
+
+  HttpTrafficCategory category = CreateTrafficCategory();
+  std::function<void(TransactionObserverResult&&)> observer;
+  if (mTransactionObserver) {
+    observer = [transactionObserver{std::move(mTransactionObserver)}](
+                   TransactionObserverResult&& aResult) {
+      transactionObserver->Complete(aResult.versionOk(), aResult.authOk(),
+                                    aResult.closeReason());
+    };
+  }
+  mTransaction->SetIsForWebTransport(!!mWebTransportSessionEventListener);
+  rv = mTransaction->Init(
+      mCaps, mConnectionInfo, &mRequestHead, mUploadStream, mReqContentLength,
+      LoadUploadStreamHasHeaders(), GetCurrentSerialEventTarget(), callbacks,
+      this, mBrowserId, category, mRequestContext, mClassOfService,
+      mInitialRwin, LoadResponseTimeoutEnabled(), mChannelId,
+      std::move(observer), std::move(pushCallback), mTransWithPushedStream,
+      mPushedStreamId);
+  if (NS_FAILED(rv)) {
+    mTransaction = nullptr;
+    return rv;
+  }
+
+  return rv;
+}
+
+HttpTrafficCategory nsHttpChannel::CreateTrafficCategory() {
+  MOZ_ASSERT(!mFirstPartyClassificationFlags ||
+             !mThirdPartyClassificationFlags);
+
+  if (!StaticPrefs::network_traffic_analyzer_enabled()) {
+    return HttpTrafficCategory::eInvalid;
+  }
+
+  HttpTrafficAnalyzer::ClassOfService cos;
+  {
+    if ((mClassOfService.Flags() & nsIClassOfService::Leader) &&
+        mLoadInfo->GetExternalContentPolicyType() ==
+            ExtContentPolicy::TYPE_SCRIPT) {
+      cos = HttpTrafficAnalyzer::ClassOfService::eLeader;
+    } else if (mLoadFlags & nsIRequest::LOAD_BACKGROUND) {
+      cos = HttpTrafficAnalyzer::ClassOfService::eBackground;
+    } else {
+      cos = HttpTrafficAnalyzer::ClassOfService::eOther;
+    }
+  }
+
+  bool isThirdParty = AntiTrackingUtils::IsThirdPartyChannel(this);
+
+  HttpTrafficAnalyzer::TrackingClassification tc;
+  {
+    uint32_t flags = isThirdParty ? mThirdPartyClassificationFlags
+                                  : mFirstPartyClassificationFlags;
+
+    using CF = nsIClassifiedChannel::ClassificationFlags;
+    using TC = HttpTrafficAnalyzer::TrackingClassification;
+
+    if (flags & CF::CLASSIFIED_TRACKING_CONTENT) {
+      tc = TC::eContent;
+    } else if (flags & CF::CLASSIFIED_FINGERPRINTING_CONTENT) {
+      tc = TC::eFingerprinting;
+    } else if (flags & CF::CLASSIFIED_ANY_BASIC_TRACKING) {
+      tc = TC::eBasic;
+    } else {
+      tc = TC::eNone;
+    }
+  }
+
+  bool isSystemPrincipal =
+      mLoadInfo->GetLoadingPrincipal() &&
+      mLoadInfo->GetLoadingPrincipal()->IsSystemPrincipal();
+  return HttpTrafficAnalyzer::CreateTrafficCategory(
+      NS_UsePrivateBrowsing(this), isSystemPrincipal, isThirdParty, cos, tc);
+}
+
+void nsHttpChannel::SetCachedContentType() {
+  if (!mResponseHead) {
+    return;
+  }
+
+  nsAutoCString contentTypeStr;
+  mResponseHead->ContentType(contentTypeStr);
+
+  uint8_t contentType = nsICacheEntry::CONTENT_TYPE_OTHER;
+  if (nsContentUtils::IsJavascriptMIMEType(
+          NS_ConvertUTF8toUTF16(contentTypeStr))) {
+    contentType = nsICacheEntry::CONTENT_TYPE_JAVASCRIPT;
+  } else if (StringBeginsWith(contentTypeStr, "text/css"_ns) ||
+             (mLoadInfo->GetExternalContentPolicyType() ==
+              ExtContentPolicy::TYPE_STYLESHEET)) {
+    contentType = nsICacheEntry::CONTENT_TYPE_STYLESHEET;
+  } else if (StringBeginsWith(contentTypeStr, "application/wasm"_ns)) {
+    contentType = nsICacheEntry::CONTENT_TYPE_WASM;
+  } else if (StringBeginsWith(contentTypeStr, "image/"_ns)) {
+    contentType = nsICacheEntry::CONTENT_TYPE_IMAGE;
+  } else if (StringBeginsWith(contentTypeStr, "video/"_ns)) {
+    contentType = nsICacheEntry::CONTENT_TYPE_MEDIA;
+  } else if (StringBeginsWith(contentTypeStr, "audio/"_ns)) {
+    contentType = nsICacheEntry::CONTENT_TYPE_MEDIA;
+  }
+
+  mCacheEntry->SetContentType(contentType);
+}
+
+nsresult nsHttpChannel::CallOnStartRequest() {
+  LOG(("nsHttpChannel::CallOnStartRequest [this=%p]", this));
+
+  MOZ_RELEASE_ASSERT(!LoadRequireCORSPreflight() || LoadIsCorsPreflightDone(),
+                     "CORS preflight must have been finished by the time we "
+                     "call OnStartRequest");
+
+  MOZ_RELEASE_ASSERT(mCanceled || LoadProcessCrossOriginSecurityHeadersCalled(),
+                     "Security headers need to have been processed before "
+                     "calling CallOnStartRequest");
+
+  mEarlyHintObserver = nullptr;
+
+  if (LoadOnStartRequestCalled()) {
+    // This can only happen when a range request loading rest of the data
+    // after interrupted concurrent cache read asynchronously failed, e.g.
+    // the response range bytes are not as expected or this channel has
+    // been externally canceled.
+    //
+    // It's legal to bypass CallOnStartRequest for that case since we've
+    // already called OnStartRequest on our listener and also added all
+    // content converters before.
+    MOZ_ASSERT(LoadConcurrentCacheAccess());
+    LOG(("CallOnStartRequest already invoked before"));
+    return mStatus;
+  }
+
+  // Ensure mListener->OnStartRequest will be invoked before exiting
+  // this function.
+  auto onStartGuard = MakeScopeExit([&] {
+    LOG(
+        ("  calling mListener->OnStartRequest by ScopeExit [this=%p, "
+         "listener=%p]\n",
+         this, mListener.get()));
+    MOZ_ASSERT(!LoadOnStartRequestCalled());
+
+    if (mListener) {
+      nsCOMPtr<nsIStreamListener> deleteProtector(mListener);
+      StoreOnStartRequestCalled(true);
+      deleteProtector->OnStartRequest(this);
+    }
+    StoreOnStartRequestCalled(true);
+  });
+
+  nsresult rv = ValidateMIMEType();
+  // Since ODA and OnStopRequest could be sent from socket process directly, we
+  // need to update the channel status before calling mListener->OnStartRequest.
+  // This is the only way to let child process discard the already received ODA
+  // messages.
+  if (NS_FAILED(rv)) {
+    mStatus = rv;
+    return mStatus;
+  }
+
+  // EnsureOpaqueResponseIsAllowed and EnsureOpauqeResponseIsAllowedAfterSniff
+  // are the checks for Opaque Response Blocking to ensure that we block as many
+  // cross-origin responses with CORS headers as possible that are not either
+  // Javascript or media to avoid leaking their contents through side channels.
+  OpaqueResponse opaqueResponse =
+      PerformOpaqueResponseSafelistCheckBeforeSniff();
+  if (opaqueResponse == OpaqueResponse::Block) {
+    SetChannelBlockedByOpaqueResponse();
+    CancelWithReason(NS_ERROR_FAILURE,
+                     "OpaqueResponseBlocker::BlockResponse"_ns);
+    return NS_ERROR_FAILURE;
+  }
+
+  // Allow consumers to override our content type
+  if (mLoadFlags & LOAD_CALL_CONTENT_SNIFFERS) {
+    // NOTE: We can have both a txn pump and a cache pump when the cache
+    // content is partial. In that case, we need to read from the cache,
+    // because that's the one that has the initial contents. If that fails
+    // then give the transaction pump a shot.
+
+    nsIChannel* thisChannel = static_cast<nsIChannel*>(this);
+
+    bool typeSniffersCalled = false;
+    if (mCachePump) {
+      typeSniffersCalled =
+          NS_SUCCEEDED(mCachePump->PeekStream(CallTypeSniffers, thisChannel));
+    }
+
+    if (!typeSniffersCalled && mTransactionPump) {
+      RefPtr<nsInputStreamPump> pump = do_QueryObject(mTransactionPump);
+      if (pump) {
+        pump->PeekStream(CallTypeSniffers, thisChannel);
+      } else {
+        MOZ_ASSERT(nsIOService::UseSocketProcess());
+        RefPtr<HttpTransactionParent> trans = do_QueryObject(mTransactionPump);
+        MOZ_ASSERT(trans);
+        trans->SetSniffedTypeToChannel(CallTypeSniffers, thisChannel);
+      }
+    }
+  }
+
+  // Note that the code below should be synced with the code in
+  // HttpTransactionChild::CanSendODAToContentProcessDirectly(). We MUST make
+  // sure HttpTransactionChild::CanSendODAToContentProcessDirectly() returns
+  // false when a stream converter is applied.
+  bool unknownDecoderStarted = false;
+  if (mResponseHead && !mResponseHead->HasContentType()) {
+    MOZ_ASSERT(mConnectionInfo, "Should have connection info here");
+    if (!mContentTypeHint.IsEmpty()) {
+      mResponseHead->SetContentType(mContentTypeHint);
+    } else if (mResponseHead->Version() == HttpVersion::v0_9 &&
+               mConnectionInfo->OriginPort() !=
+                   mConnectionInfo->DefaultPort()) {
+      mResponseHead->SetContentType(nsLiteralCString(TEXT_PLAIN));
+    } else {
+      // Uh-oh.  We had better find out what type we are!
+      mListener = new nsUnknownDecoder(mListener);
+      unknownDecoderStarted = true;
+    }
+  }
+
+  // If unknownDecoder is not going to be launched, call
+  // EnsureOpaqueResponseIsAllowedAfterSniff immediately.
+  if (!unknownDecoderStarted) {
+    if (opaqueResponse == OpaqueResponse::SniffCompressed) {
+      mListener = new nsCompressedAudioVideoImageDetector(
+          mListener, &HttpBaseChannel::CallTypeSniffers);
+    } else if (opaqueResponse == OpaqueResponse::Sniff) {
+      MOZ_DIAGNOSTIC_ASSERT(mORB);
+      nsresult rv = mORB->EnsureOpaqueResponseIsAllowedAfterSniff(this);
+
+      if (NS_FAILED(rv)) {
+        return rv;
+      }
+    }
+  }
+
+  // If the content is multipart/x-mixed-replace, we'll insert a MIME decoder
+  // in the pipeline to handle the content and pass it along to our
+  // original listener. nsUnknownDecoder doesn't support detecting this type,
+  // so we only need to insert this using the response header's mime type.
+  //
+  // We only do this for unwrapped document loads, since we might want to send
+  // parts to the external protocol handler without leaving the parent process.
+  bool mustRunStreamFilterInParent = false;
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(this, parentChannel);
+  RefPtr<DocumentLoadListener> docListener = do_QueryObject(parentChannel);
+  if (mResponseHead && docListener && docListener->GetChannel() == this) {
+    nsAutoCString contentType;
+    mResponseHead->ContentType(contentType);
+
+    if (contentType.Equals("multipart/x-mixed-replace"_ns)) {
+      nsCOMPtr<nsIStreamConverterService> convServ(
+          do_GetService("@mozilla.org/streamConverters;1", &rv));
+      if (NS_SUCCEEDED(rv)) {
+        nsCOMPtr<nsIStreamListener> toListener(mListener);
+        nsCOMPtr<nsIStreamListener> fromListener;
+
+        rv = convServ->AsyncConvertData("multipart/x-mixed-replace", "*/*",
+                                        toListener, nullptr,
+                                        getter_AddRefs(fromListener));
+        if (NS_SUCCEEDED(rv)) {
+          mListener = fromListener;
+          mustRunStreamFilterInParent = true;
+        }
+      }
+    }
+  }
+
+  // If we installed a multipart converter, then we need to add StreamFilter
+  // object before it, so that extensions see the un-parsed original stream.
+  // We may want to add an option for extensions to opt-in to proper multipart
+  // handling.
+  // If not, then pass the StreamFilter promise on to DocumentLoadListener,
+  // where it'll be added in the content process.
+  for (StreamFilterRequest& request : mStreamFilterRequests) {
+    if (mustRunStreamFilterInParent) {
+      mozilla::ipc::Endpoint<extensions::PStreamFilterParent> parent;
+      mozilla::ipc::Endpoint<extensions::PStreamFilterChild> child;
+      nsresult rv = extensions::PStreamFilter::CreateEndpoints(&parent, &child);
+      if (NS_FAILED(rv)) {
+        request.mPromise->Reject(false, __func__);
+      } else {
+        extensions::StreamFilterParent::Attach(this, std::move(parent));
+        request.mPromise->Resolve(std::move(child), __func__);
+      }
+    } else {
+      if (docListener) {
+        docListener->AttachStreamFilter()->ChainTo(request.mPromise.forget(),
+                                                   __func__);
+      } else {
+        request.mPromise->Reject(false, __func__);
+      }
+    }
+    request.mPromise = nullptr;
+  }
+  mStreamFilterRequests.Clear();
+  StoreTracingEnabled(false);
+
+  if (mResponseHead && !mResponseHead->HasContentCharset()) {
+    mResponseHead->SetContentCharset(mContentCharsetHint);
+  }
+
+  if (mCacheEntry && LoadCacheEntryIsWriteOnly()) {
+    SetCachedContentType();
+  }
+
+  LOG(("  calling mListener->OnStartRequest [this=%p, listener=%p]\n", this,
+       mListener.get()));
+
+  // About to call OnStartRequest, dismiss the guard object.
+  onStartGuard.release();
+
+  if (mListener) {
+    MOZ_ASSERT(!LoadOnStartRequestCalled(),
+               "We should not call OsStartRequest twice");
+    nsCOMPtr<nsIStreamListener> deleteProtector(mListener);
+    StoreOnStartRequestCalled(true);
+    rv = deleteProtector->OnStartRequest(this);
+    if (NS_FAILED(rv)) return rv;
+  } else {
+    NS_WARNING("OnStartRequest skipped because of null listener");
+    StoreOnStartRequestCalled(true);
+  }
+
+  // Install stream converter if required.
+  // Normally, we expect the listener to disable content conversion during
+  // OnStartRequest if it wants to handle it itself (which is common case with
+  // HttpChannelParent, disabling so that it can be done in the content
+  // process). If we've installed an nsUnknownDecoder, then we won't yet have
+  // called OnStartRequest on the final listener (that happens after we send
+  // OnDataAvailable to the nsUnknownDecoder), so it can't yet have disabled
+  // content conversion.
+  // In that case, assume that the listener will disable content conversion,
+  // unless it's specifically told us that it won't.
+  if (!unknownDecoderStarted || LoadListenerRequiresContentConversion()) {
+    nsCOMPtr<nsIStreamListener> listener;
+    rv =
+        DoApplyContentConversions(mListener, getter_AddRefs(listener), nullptr);
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+    if (listener) {
+      MOZ_ASSERT(!LoadDataSentToChildProcess(),
+                 "DataSentToChildProcess being true means ODAs are sent to "
+                 "the child process directly. We MUST NOT apply content "
+                 "converter in this case.");
+      mListener = listener;
+      mCompressListener = listener;
+      StoreHasAppliedConversion(true);
+    }
+  }
+
+  // if this channel is for a download, close off access to the cache.
+  if (mCacheEntry && LoadChannelIsForDownload()) {
+    mCacheEntry->AsyncDoom(nullptr);
+
+    // We must keep the cache entry in case of partial request.
+    // Concurrent access is the same, we need the entry in
+    // OnStopRequest.
+    // We also need the cache entry when racing cache with network to find
+    // out what is the source of the data.
+    if (!LoadCachedContentIsPartial() && !LoadConcurrentCacheAccess() &&
+        !(mRaceCacheWithNetwork &&
+          mFirstResponseSource == RESPONSE_FROM_CACHE)) {
+      CloseCacheEntry(false);
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::GetHttpProxyConnectResponseCode(
+    int32_t* aResponseCode) {
+  NS_ENSURE_ARG_POINTER(aResponseCode);
+
+  if (mConnectionInfo && mConnectionInfo->UsingConnect()) {
+    *aResponseCode = mProxyConnectResponseCode;
+  } else {
+    *aResponseCode = -1;
+  }
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::ProcessFailedProxyConnect(uint32_t httpStatus) {
+  // Failure to set up a proxy tunnel via CONNECT means one of the following:
+  // 1) Proxy wants authorization, or forbids.
+  // 2) DNS at proxy couldn't resolve target URL.
+  // 3) Proxy connection to target failed or timed out.
+  // 4) Eve intercepted our CONNECT, and is replying with malicious HTML.
+  //
+  // Our current architecture would parse the proxy's response content with
+  // the permission of the target URL.  Given #4, we must avoid rendering the
+  // body of the reply, and instead give the user a (hopefully helpful)
+  // boilerplate error page, based on just the HTTP status of the reply.
+
+  MOZ_ASSERT(mConnectionInfo->UsingConnect(),
+             "proxy connect failed but not using CONNECT?");
+  nsresult rv = HttpProxyResponseToErrorCode(httpStatus);
+  LOG(("Cancelling failed proxy CONNECT [this=%p httpStatus=%u]\n", this,
+       httpStatus));
+
+  // Make sure the connection is thrown away as it can be in a bad state
+  // and the proxy may just hang on the next request.
+  MOZ_ASSERT(mTransaction);
+  mTransaction->DontReuseConnection();
+
+  Cancel(rv);
+  {
+    nsresult rv = CallOnStartRequest();
+    if (NS_FAILED(rv)) {
+      LOG(("CallOnStartRequest failed [this=%p httpStatus=%u rv=%08x]\n", this,
+           httpStatus, static_cast<uint32_t>(rv)));
+    }
+  }
+  return rv;
+}
+
+static void GetSTSConsoleErrorTag(uint32_t failureResult,
+                                  nsAString& consoleErrorTag) {
+  switch (failureResult) {
+    case nsISiteSecurityService::ERROR_COULD_NOT_PARSE_HEADER:
+      consoleErrorTag = u"STSCouldNotParseHeader"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_NO_MAX_AGE:
+      consoleErrorTag = u"STSNoMaxAge"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_MULTIPLE_MAX_AGES:
+      consoleErrorTag = u"STSMultipleMaxAges"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_INVALID_MAX_AGE:
+      consoleErrorTag = u"STSInvalidMaxAge"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_MULTIPLE_INCLUDE_SUBDOMAINS:
+      consoleErrorTag = u"STSMultipleIncludeSubdomains"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_INVALID_INCLUDE_SUBDOMAINS:
+      consoleErrorTag = u"STSInvalidIncludeSubdomains"_ns;
+      break;
+    case nsISiteSecurityService::ERROR_COULD_NOT_SAVE_STATE:
+      consoleErrorTag = u"STSCouldNotSaveState"_ns;
+      break;
+    default:
+      consoleErrorTag = u"STSUnknownError"_ns;
+      break;
+  }
+}
+
+/**
+ * Process an HTTP Strict Transport Security (HSTS) header.
+ */
+nsresult nsHttpChannel::ProcessHSTSHeader(nsITransportSecurityInfo* aSecInfo) {
+  nsHttpAtom atom(nsHttp::ResolveAtom("Strict-Transport-Security"_ns));
+
+  nsAutoCString securityHeader;
+  nsresult rv = mResponseHead->GetHeader(atom, securityHeader);
+  if (rv == NS_ERROR_NOT_AVAILABLE) {
+    LOG(("nsHttpChannel: No %s header, continuing load.\n", atom.get()));
+    return NS_OK;
+  }
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (!aSecInfo) {
+    LOG(("nsHttpChannel::ProcessHSTSHeader: no securityInfo?"));
+    return NS_ERROR_INVALID_ARG;
+  }
+  nsITransportSecurityInfo::OverridableErrorCategory overridableErrorCategory;
+  rv = aSecInfo->GetOverridableErrorCategory(&overridableErrorCategory);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+  if (overridableErrorCategory !=
+      nsITransportSecurityInfo::OverridableErrorCategory::ERROR_UNSET) {
+    LOG(
+        ("nsHttpChannel::ProcessHSTSHeader: untrustworthy connection - not "
+         "processing header"));
+    return NS_ERROR_FAILURE;
+  }
+
+  nsISiteSecurityService* sss = gHttpHandler->GetSSService();
+  NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
+
+  OriginAttributes originAttributes;
+  if (NS_WARN_IF(!StoragePrincipalHelper::GetOriginAttributesForHSTS(
+          this, originAttributes))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uint32_t failureResult;
+  rv = sss->ProcessHeader(mURI, securityHeader, originAttributes, nullptr,
+                          nullptr, &failureResult);
+  if (NS_FAILED(rv)) {
+    nsAutoString consoleErrorCategory(u"Invalid HSTS Headers"_ns);
+    nsAutoString consoleErrorTag;
+    GetSTSConsoleErrorTag(failureResult, consoleErrorTag);
+    Unused << AddSecurityMessage(consoleErrorTag, consoleErrorCategory);
+    LOG(("nsHttpChannel: Failed to parse %s header, continuing load.\n",
+         atom.get()));
+  }
+  return NS_OK;
+}
+
+/**
+ * Decide whether or not to remember Strict-Transport-Security, and whether
+ * or not to enforce channel integrity.
+ *
+ * @return NS_ERROR_FAILURE if there's security information missing even though
+ *             it's an HTTPS connection.
+ */
+nsresult nsHttpChannel::ProcessSecurityHeaders() {
+  // If this channel is not loading securely, STS or PKP doesn't do anything.
+  // In the case of HSTS, the upgrade to HTTPS takes place earlier in the
+  // channel load process.
+  if (!mURI->SchemeIs("https")) {
+    return NS_OK;
+  }
+
+  if (IsBrowsingContextDiscarded()) {
+    return NS_OK;
+  }
+
+  nsAutoCString asciiHost;
+  nsresult rv = mURI->GetAsciiHost(asciiHost);
+  NS_ENSURE_SUCCESS(rv, NS_OK);
+
+  // If the channel is not a hostname, but rather an IP, do not process STS
+  // or PKP headers
+  if (HostIsIPLiteral(asciiHost)) {
+    return NS_OK;
+  }
+
+  // mSecurityInfo may not always be present, and if it's not then it is okay
+  // to just disregard any security headers since we know nothing about the
+  // security of the connection.
+  NS_ENSURE_TRUE(mSecurityInfo, NS_OK);
+
+  // Only process HSTS headers for first-party loads. This prevents a
+  // proliferation of useless HSTS state for partitioned third parties.
+  if (!mLoadInfo->GetIsThirdPartyContextToTopWindow()) {
+    rv = ProcessHSTSHeader(mSecurityInfo);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  return NS_OK;
+}
+
+bool nsHttpChannel::IsHTTPS() { return mURI->SchemeIs("https"); }
+
+void nsHttpChannel::ProcessSSLInformation() {
+  // If this is HTTPS, record any use of RSA so that Key Exchange Algorithm
+  // can be whitelisted for TLS False Start in future sessions. We could
+  // do the same for DH but its rarity doesn't justify the lookup.
+
+  if (mCanceled || NS_FAILED(mStatus) || !mSecurityInfo || !IsHTTPS() ||
+      mPrivateBrowsing) {
+    return;
+  }
+
+  if (!mSecurityInfo) {
+    return;
+  }
+
+  uint32_t state;
+  if (NS_SUCCEEDED(mSecurityInfo->GetSecurityState(&state)) &&
+      (state & nsIWebProgressListener::STATE_IS_BROKEN)) {
+    // Send weak crypto warnings to the web console
+    if (state & nsIWebProgressListener::STATE_USES_WEAK_CRYPTO) {
+      nsString consoleErrorTag = u"WeakCipherSuiteWarning"_ns;
+      nsString consoleErrorCategory = u"SSL"_ns;
+      Unused << AddSecurityMessage(consoleErrorTag, consoleErrorCategory);
+    }
+  }
+
+  uint16_t tlsVersion;
+  nsresult rv = mSecurityInfo->GetProtocolVersion(&tlsVersion);
+  if (NS_SUCCEEDED(rv) &&
+      tlsVersion != nsITransportSecurityInfo::TLS_VERSION_1_2 &&
+      tlsVersion != nsITransportSecurityInfo::TLS_VERSION_1_3) {
+    nsString consoleErrorTag = u"DeprecatedTLSVersion2"_ns;
+    nsString consoleErrorCategory = u"TLS"_ns;
+    Unused << AddSecurityMessage(consoleErrorTag, consoleErrorCategory);
+  }
+}
+
+void nsHttpChannel::ProcessAltService() {
+  // e.g. Alt-Svc: h2=":443"; ma=60
+  // e.g. Alt-Svc: h2="otherhost:443"
+  // Alt-Svc       = 1#( alternative *( OWS ";" OWS parameter ) )
+  // alternative   = protocol-id "=" alt-authority
+  // protocol-id   = token ; percent-encoded ALPN protocol identifier
+  // alt-authority = quoted-string ;  containing [ uri-host ] ":" port
+
+  if (!LoadAllowAltSvc()) {  // per channel opt out
+    return;
+  }
+
+  if (mWebTransportSessionEventListener) {
+    return;
+  }
+
+  if (!gHttpHandler->AllowAltSvc() || (mCaps & NS_HTTP_DISALLOW_SPDY)) {
+    return;
+  }
+
+  if (IsBrowsingContextDiscarded()) {
+    return;
+  }
+
+  nsAutoCString scheme;
+  mURI->GetScheme(scheme);
+  bool isHttp = scheme.EqualsLiteral("http");
+  if (!isHttp && !scheme.EqualsLiteral("https")) {
+    return;
+  }
+
+  nsAutoCString altSvc;
+  Unused << mResponseHead->GetHeader(nsHttp::Alternate_Service, altSvc);
+  if (altSvc.IsEmpty()) {
+    return;
+  }
+
+  if (!nsHttp::IsReasonableHeaderValue(altSvc)) {
+    LOG(("Alt-Svc Response Header seems unreasonable - skipping\n"));
+    return;
+  }
+
+  nsAutoCString originHost;
+  int32_t originPort = 80;
+  mURI->GetPort(&originPort);
+  if (NS_FAILED(mURI->GetAsciiHost(originHost))) {
+    return;
+  }
+
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  nsCOMPtr<nsProxyInfo> proxyInfo;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         getter_AddRefs(callbacks));
+
+  if (mProxyInfo) {
+    proxyInfo = do_QueryInterface(mProxyInfo);
+  }
+
+  OriginAttributes originAttributes;
+  // Regular principal in case we have a proxy.
+  if (proxyInfo &&
+      !StaticPrefs::privacy_partition_network_state_connection_with_proxy()) {
+    StoragePrincipalHelper::GetOriginAttributes(
+        this, originAttributes, StoragePrincipalHelper::eRegularPrincipal);
+  } else {
+    StoragePrincipalHelper::GetOriginAttributesForNetworkState(
+        this, originAttributes);
+  }
+
+  AltSvcMapping::ProcessHeader(
+      altSvc, scheme, originHost, originPort, mUsername, mPrivateBrowsing,
+      callbacks, proxyInfo, mCaps & NS_HTTP_DISALLOW_SPDY, originAttributes);
+}
+
+nsresult nsHttpChannel::ProcessResponse() {
+  uint32_t httpStatus = mResponseHead->Status();
+
+  LOG(("nsHttpChannel::ProcessResponse [this=%p httpStatus=%u]\n", this,
+       httpStatus));
+
+  // Gather data on whether the transaction and page (if this is
+  // the initial page load) is being loaded with SSL.
+  Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_IS_SSL,
+                        mConnectionInfo->EndToEndSSL());
+  if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+    Telemetry::Accumulate(Telemetry::HTTP_PAGELOAD_IS_SSL,
+                          mConnectionInfo->EndToEndSSL());
+  }
+
+  if (Telemetry::CanRecordPrereleaseData()) {
+    // how often do we see something like Alt-Svc: "443:quic,p=1"
+    // and Alt-Svc: "h3-****"
+    nsAutoCString alt_service;
+    Unused << mResponseHead->GetHeader(nsHttp::Alternate_Service, alt_service);
+    uint32_t saw_quic = 0;
+    if (!alt_service.IsEmpty()) {
+      if (strstr(alt_service.get(), "h3-")) {
+        saw_quic = 1;
+      } else if (strstr(alt_service.get(), "quic")) {
+        saw_quic = 2;
+      }
+    }
+    Telemetry::Accumulate(Telemetry::HTTP_SAW_QUIC_ALT_PROTOCOL_2, saw_quic);
+
+    // Gather data on how many URLS get redirected
+    switch (httpStatus) {
+      case 200:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 0);
+        break;
+      case 301:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 1);
+        break;
+      case 302:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 2);
+        break;
+      case 304:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 3);
+        break;
+      case 307:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 4);
+        break;
+      case 308:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 5);
+        break;
+      case 400:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 6);
+        break;
+      case 401:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 7);
+        break;
+      case 403:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 8);
+        break;
+      case 404:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 9);
+        break;
+      case 500:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 10);
+        break;
+      default:
+        Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_STATUS_CODE, 11);
+        break;
+    }
+  }
+
+  // Let the predictor know whether this was a cacheable response or not so
+  // that it knows whether or not to possibly prefetch this resource in the
+  // future.
+  // We use GetReferringPage because mReferrerInfo may not be set at all(this is
+  // especially useful in xpcshell tests, where we don't have an actual pageload
+  // to get a referrer from).
+  nsCOMPtr<nsIURI> referrer = GetReferringPage();
+  if (!referrer && mReferrerInfo) {
+    referrer = mReferrerInfo->GetOriginalReferrer();
+  }
+
+  if (referrer) {
+    nsCOMPtr<nsILoadContextInfo> lci = GetLoadContextInfo(this);
+    mozilla::net::Predictor::UpdateCacheability(
+        referrer, mURI, httpStatus, mRequestHead, mResponseHead.get(), lci,
+        IsThirdPartyTrackingResource());
+  }
+
+  // Only allow 407 (authentication required) to continue
+  if (mTransaction && mTransaction->ProxyConnectFailed() && httpStatus != 407) {
+    return ProcessFailedProxyConnect(httpStatus);
+  }
+
+  MOZ_ASSERT(!mCachedContentIsValid || mRaceCacheWithNetwork,
+             "We should not be hitting the network if we have valid cached "
+             "content unless we are racing the network and cache");
+
+  ProcessSSLInformation();
+
+  // notify "http-on-examine-response" observers
+  gHttpHandler->OnExamineResponse(this);
+
+  return ContinueProcessResponse1();
+}
+
+void nsHttpChannel::AsyncContinueProcessResponse() {
+  nsresult rv;
+  rv = ContinueProcessResponse1();
+  if (NS_FAILED(rv)) {
+    // A synchronous failure here would normally be passed as the return
+    // value from OnStartRequest, which would in turn cancel the request.
+    // If we're continuing asynchronously, we need to cancel the request
+    // ourselves.
+    Unused << Cancel(rv);
+  }
+}
+
+nsresult nsHttpChannel::ContinueProcessResponse1() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+  nsresult rv = NS_OK;
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume to finish processing response [this=%p]\n",
+         this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->AsyncContinueProcessResponse();
+      return NS_OK;
+    };
+    return NS_OK;
+  }
+
+  // Check if request was cancelled during http-on-examine-response.
+  if (mCanceled) {
+    return CallOnStartRequest();
+  }
+
+  uint32_t httpStatus = mResponseHead->Status();
+
+  // STS, Cookies and Alt-Service should not be handled on proxy failure.
+  // If proxy CONNECT response needs to complete, wait to process connection
+  // for Strict-Transport-Security.
+  if (!(mTransaction && mTransaction->ProxyConnectFailed()) &&
+      (httpStatus != 407)) {
+    if (nsAutoCString cookie;
+        NS_SUCCEEDED(mResponseHead->GetHeader(nsHttp::Set_Cookie, cookie))) {
+      SetCookie(cookie);
+      nsCOMPtr<nsIParentChannel> parentChannel;
+      NS_QueryNotificationCallbacks(this, parentChannel);
+      if (RefPtr<HttpChannelParent> httpParent =
+              do_QueryObject(parentChannel)) {
+        httpParent->SetCookie(std::move(cookie));
+      }
+    }
+
+    // Given a successful connection, process any STS or PKP data that's
+    // relevant.
+    DebugOnly<nsresult> rv = ProcessSecurityHeaders();
+    MOZ_ASSERT(NS_SUCCEEDED(rv), "ProcessSTSHeader failed, continuing load.");
+
+    if ((httpStatus < 500) && (httpStatus != 421)) {
+      ProcessAltService();
+    }
+  }
+
+  if (LoadConcurrentCacheAccess() && LoadCachedContentIsPartial() &&
+      httpStatus != 206) {
+    LOG(
+        ("  only expecting 206 when doing partial request during "
+         "interrupted cache concurrent read"));
+    return NS_ERROR_CORRUPTED_CONTENT;
+  }
+
+  // handle unused username and password in url (see bug 232567)
+  if (httpStatus != 401 && httpStatus != 407) {
+    if (!mAuthRetryPending) {
+      rv = mAuthProvider->CheckForSuperfluousAuth();
+      if (NS_FAILED(rv)) {
+        LOG(("  CheckForSuperfluousAuth failed (%08x)",
+             static_cast<uint32_t>(rv)));
+      }
+    }
+    if (mCanceled) return CallOnStartRequest();
+
+    // reset the authentication's current continuation state because ourvr
+    // last authentication attempt has been completed successfully
+    rv = mAuthProvider->Disconnect(NS_ERROR_ABORT);
+    if (NS_FAILED(rv)) {
+      LOG(("  Disconnect failed (%08x)", static_cast<uint32_t>(rv)));
+    }
+    mAuthProvider = nullptr;
+    LOG(("  continuation state has been reset"));
+  }
+
+  // No process switch needed, continue as normal.
+  return ContinueProcessResponse2(rv);
+}
+
+nsresult nsHttpChannel::ContinueProcessResponse2(nsresult rv) {
+  if (NS_FAILED(rv) && !mCanceled) {
+    // The process switch failed, cancel this channel.
+    Cancel(rv);
+    return CallOnStartRequest();
+  }
+
+  if (mAPIRedirectToURI && !mCanceled) {
+    MOZ_ASSERT(!LoadOnStartRequestCalled());
+    nsCOMPtr<nsIURI> redirectTo;
+    mAPIRedirectToURI.swap(redirectTo);
+
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse3);
+    rv = StartRedirectChannelToURI(redirectTo,
+                                   nsIChannelEventSink::REDIRECT_TEMPORARY);
+    if (NS_SUCCEEDED(rv)) {
+      return NS_OK;
+    }
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse3);
+  }
+
+  // Hack: ContinueProcessResponse3 uses NS_OK to detect successful
+  // redirects, so we distinguish this codepath (a non-redirect that's
+  // processing normally) by passing in a bogus error code.
+  return ContinueProcessResponse3(NS_BINDING_FAILED);
+}
+
+nsresult nsHttpChannel::ContinueProcessResponse3(nsresult rv) {
+  LOG(("nsHttpChannel::ContinueProcessResponse3 [this=%p, rv=%" PRIx32 "]",
+       this, static_cast<uint32_t>(rv)));
+
+  if (NS_SUCCEEDED(rv)) {
+    // redirectTo() has passed through, we don't want to go on with
+    // this channel.  It will now be canceled by the redirect handling
+    // code that called this function.
+    return NS_OK;
+  }
+
+  rv = NS_OK;
+
+  uint32_t httpStatus = mResponseHead->Status();
+  bool transactionRestarted = mTransaction->TakeRestartedState();
+
+  // handle different server response categories.  Note that we handle
+  // caching or not caching of error pages in
+  // nsHttpResponseHead::MustValidate; if you change this switch, update that
+  // one
+  switch (httpStatus) {
+    case 200:
+    case 203:
+      // Per RFC 2616, 14.35.2, "A server MAY ignore the Range header".
+      // So if a server does that and sends 200 instead of 206 that we
+      // expect, notify our caller.
+      // However, if we wanted to start from the beginning, let it go through
+      if (LoadResuming() && mStartPos != 0) {
+        LOG(("Server ignored our Range header, cancelling [this=%p]\n", this));
+        Cancel(NS_ERROR_NOT_RESUMABLE);
+        rv = CallOnStartRequest();
+        break;
+      }
+      // these can normally be cached
+      rv = ProcessNormal();
+      MaybeInvalidateCacheEntryForSubsequentGet();
+      break;
+    case 206:
+      if (LoadCachedContentIsPartial()) {  // an internal byte range request...
+        auto func = [](auto* self, nsresult aRv) {
+          return self->ContinueProcessResponseAfterPartialContent(aRv);
+        };
+        rv = ProcessPartialContent(func);
+        // Directly call ContinueProcessResponseAfterPartialContent if channel
+        // is not suspended or ProcessPartialContent throws.
+        if (!mSuspendCount || NS_FAILED(rv)) {
+          return ContinueProcessResponseAfterPartialContent(rv);
+        }
+        return NS_OK;
+      } else {
+        mCacheInputStream.CloseAndRelease();
+        rv = ProcessNormal();
+      }
+      break;
+    case 300:
+    case 301:
+    case 302:
+    case 307:
+    case 308:
+    case 303:
+#if 0
+    case 305: // disabled as a security measure (see bug 187996).
+#endif
+      // don't store the response body for redirects
+      MaybeInvalidateCacheEntryForSubsequentGet();
+      PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse4);
+      rv = AsyncProcessRedirection(httpStatus);
+      if (NS_FAILED(rv)) {
+        PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse4);
+        LOG(("AsyncProcessRedirection failed [rv=%" PRIx32 "]\n",
+             static_cast<uint32_t>(rv)));
+        // don't cache failed redirect responses.
+        if (mCacheEntry) mCacheEntry->AsyncDoom(nullptr);
+        if (DoNotRender3xxBody(rv)) {
+          mStatus = rv;
+          DoNotifyListener();
+        } else {
+          rv = ContinueProcessResponse4(rv);
+        }
+      }
+      break;
+    case 304:
+      if (!ShouldBypassProcessNotModified()) {
+        auto func = [](auto* self, nsresult aRv) {
+          return self->ContinueProcessResponseAfterNotModified(aRv);
+        };
+        rv = ProcessNotModified(func);
+        // Directly call ContinueProcessResponseAfterNotModified if channel
+        // is not suspended or ProcessNotModified throws.
+        if (!mSuspendCount || NS_FAILED(rv)) {
+          return ContinueProcessResponseAfterNotModified(rv);
+        }
+        return NS_OK;
+      }
+
+      // Don't cache uninformative 304
+      if (LoadCustomConditionalRequest()) {
+        CloseCacheEntry(false);
+      }
+
+      if (ShouldBypassProcessNotModified() || NS_FAILED(rv)) {
+        rv = ProcessNormal();
+      }
+      break;
+    case 401:
+    case 407:
+      if (MOZ_UNLIKELY(httpStatus == 407 && transactionRestarted)) {
+        // The transaction has been internally restarted.  We want to
+        // authenticate to the proxy again, so reuse either cached credentials
+        // or use default credentials for NTLM/Negotiate.  This prevents
+        // considering the previously used creadentials as invalid.
+        mAuthProvider->ClearProxyIdent();
+      }
+      if (MOZ_UNLIKELY(LoadCustomAuthHeader()) && httpStatus == 401) {
+        // When a custom auth header fails, we don't want to try
+        // any cached credentials, nor we want to ask the user.
+        // It's up to the consumer to re-try w/o setting a custom
+        // auth header if cached credentials should be attempted.
+        rv = NS_ERROR_FAILURE;
+      } else if (httpStatus == 401 &&
+                 StaticPrefs::
+                     network_auth_supress_auth_prompt_for_XFO_failures() &&
+                 !nsContentSecurityUtils::CheckCSPFrameAncestorAndXFO(this)) {
+        // CSP Frame Ancestor and X-Frame-Options check has failed
+        // Do not prompt http auth - Bug 1629307
+        rv = NS_ERROR_FAILURE;
+      } else {
+        rv = mAuthProvider->ProcessAuthentication(
+            httpStatus, mConnectionInfo->EndToEndSSL() && mTransaction &&
+                            mTransaction->ProxyConnectFailed());
+      }
+      if (rv == NS_ERROR_IN_PROGRESS) {
+        // authentication prompt has been invoked and result
+        // is expected asynchronously
+        mIsAuthChannel = true;
+        mAuthRetryPending = true;
+        if (httpStatus == 407 ||
+            (mTransaction && mTransaction->ProxyConnectFailed())) {
+          StoreProxyAuthPending(true);
+        }
+
+        // suspend the transaction pump to stop receiving the
+        // unauthenticated content data. We will throw that data
+        // away when user provides credentials or resume the pump
+        // when user refuses to authenticate.
+        LOG(
+            ("Suspending the transaction, asynchronously prompting for "
+             "credentials"));
+        mTransactionPump->Suspend();
+
+#ifdef DEBUG
+        // This is for test purposes only. See bug 1683176 for details.
+        gHttpHandler->OnTransactionSuspendedDueToAuthentication(this);
+#endif
+        rv = NS_OK;
+      } else if (NS_FAILED(rv)) {
+        LOG(("ProcessAuthentication failed [rv=%" PRIx32 "]\n",
+             static_cast<uint32_t>(rv)));
+        if (mTransaction && mTransaction->ProxyConnectFailed()) {
+          return ProcessFailedProxyConnect(httpStatus);
+        }
+        if (!mAuthRetryPending) {
+          rv = mAuthProvider->CheckForSuperfluousAuth();
+          if (NS_FAILED(rv)) {
+            LOG(("CheckForSuperfluousAuth failed [rv=%x]\n",
+                 static_cast<uint32_t>(rv)));
+          }
+        }
+        rv = ProcessNormal();
+      } else {
+        mIsAuthChannel = true;
+        mAuthRetryPending = true;  // see DoAuthRetry
+      }
+      break;
+
+    case 408:
+    case 425:
+    case 429:
+      // Do not cache 408, 425 and 429.
+      CloseCacheEntry(false);
+      [[fallthrough]];  // process normally
+    default:
+      rv = ProcessNormal();
+      MaybeInvalidateCacheEntryForSubsequentGet();
+      break;
+  }
+
+  UpdateCacheDisposition(false, false);
+  return rv;
+}
+
+nsresult nsHttpChannel::ContinueProcessResponseAfterPartialContent(
+    nsresult aRv) {
+  LOG(
+      ("nsHttpChannel::ContinueProcessResponseAfterPartialContent "
+       "[this=%p, rv=%" PRIx32 "]",
+       this, static_cast<uint32_t>(aRv)));
+
+  UpdateCacheDisposition(false, NS_SUCCEEDED(aRv));
+  return aRv;
+}
+
+nsresult nsHttpChannel::ContinueProcessResponseAfterNotModified(nsresult aRv) {
+  LOG(
+      ("nsHttpChannel::ContinueProcessResponseAfterNotModified "
+       "[this=%p, rv=%" PRIx32 "]",
+       this, static_cast<uint32_t>(aRv)));
+
+  if (NS_SUCCEEDED(aRv)) {
+    StoreTransactionReplaced(true);
+    UpdateCacheDisposition(true, false);
+    return NS_OK;
+  }
+
+  LOG(("ProcessNotModified failed [rv=%" PRIx32 "]\n",
+       static_cast<uint32_t>(aRv)));
+
+  // We cannot read from the cache entry, it might be in an
+  // incosistent state.  Doom it and redirect the channel
+  // to the same URI to reload from the network.
+  mCacheInputStream.CloseAndRelease();
+  if (mCacheEntry) {
+    mCacheEntry->AsyncDoom(nullptr);
+    mCacheEntry = nullptr;
+  }
+
+  nsresult rv =
+      StartRedirectChannelToURI(mURI, nsIChannelEventSink::REDIRECT_INTERNAL);
+  if (NS_SUCCEEDED(rv)) {
+    return NS_OK;
+  }
+
+  // Don't cache uninformative 304
+  if (LoadCustomConditionalRequest()) {
+    CloseCacheEntry(false);
+  }
+
+  if (ShouldBypassProcessNotModified() || NS_FAILED(rv)) {
+    rv = ProcessNormal();
+  }
+
+  UpdateCacheDisposition(false, false);
+  return rv;
+}
+
+void nsHttpChannel::UpdateCacheDisposition(bool aSuccessfulReval,
+                                           bool aPartialContentUsed) {
+  if (mRaceDelay && !mRaceCacheWithNetwork &&
+      (LoadCachedContentIsPartial() || mDidReval)) {
+    if (aSuccessfulReval || aPartialContentUsed) {
+      AccumulateCategorical(
+          Telemetry::LABELS_NETWORK_RACE_CACHE_VALIDATION::CachedContentUsed);
+    } else {
+      AccumulateCategorical(Telemetry::LABELS_NETWORK_RACE_CACHE_VALIDATION::
+                                CachedContentNotUsed);
+    }
+  }
+
+  if (Telemetry::CanRecordPrereleaseData()) {
+    CacheDisposition cacheDisposition;
+    if (!mDidReval) {
+      cacheDisposition = kCacheMissed;
+    } else if (aSuccessfulReval) {
+      cacheDisposition = kCacheHitViaReval;
+    } else {
+      cacheDisposition = kCacheMissedViaReval;
+    }
+    AccumulateCacheHitTelemetry(cacheDisposition, this);
+    mCacheDisposition = cacheDisposition;
+
+    Telemetry::Accumulate(Telemetry::HTTP_RESPONSE_VERSION,
+                          static_cast<uint32_t>(mResponseHead->Version()));
+
+    if (mResponseHead->Version() == HttpVersion::v0_9) {
+      // DefaultPortTopLevel = 0, DefaultPortSubResource = 1,
+      // NonDefaultPortTopLevel = 2, NonDefaultPortSubResource = 3
+      uint32_t v09Info = 0;
+      if (!(mLoadFlags & LOAD_INITIAL_DOCUMENT_URI)) {
+        v09Info += 1;
+      }
+      if (mConnectionInfo->OriginPort() != mConnectionInfo->DefaultPort()) {
+        v09Info += 2;
+      }
+      Telemetry::Accumulate(Telemetry::HTTP_09_INFO, v09Info);
+    }
+  }
+}
+
+nsresult nsHttpChannel::ContinueProcessResponse4(nsresult rv) {
+  bool doNotRender = DoNotRender3xxBody(rv);
+
+  if (rv == NS_ERROR_DOM_BAD_URI && mRedirectURI) {
+    bool isHTTP =
+        mRedirectURI->SchemeIs("http") || mRedirectURI->SchemeIs("https");
+    if (!isHTTP) {
+      // This was a blocked attempt to redirect and subvert the system by
+      // redirecting to another protocol (perhaps javascript:)
+      // In that case we want to throw an error instead of displaying the
+      // non-redirected response body.
+      LOG(("ContinueProcessResponse4 detected rejected Non-HTTP Redirection"));
+      doNotRender = true;
+      rv = NS_ERROR_CORRUPTED_CONTENT;
+    }
+  }
+
+  if (doNotRender) {
+    Cancel(rv);
+    DoNotifyListener();
+    return rv;
+  }
+
+  if (NS_SUCCEEDED(rv)) {
+    UpdateInhibitPersistentCachingFlag();
+
+    MaybeCreateCacheEntryWhenRCWN();
+
+    rv = InitCacheEntry();
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("ContinueProcessResponse4 "
+           "failed to init cache entry [rv=%x]\n",
+           static_cast<uint32_t>(rv)));
+    }
+    CloseCacheEntry(false);
+    return NS_OK;
+  }
+
+  LOG(("ContinueProcessResponse4 got failure result [rv=%" PRIx32 "]\n",
+       static_cast<uint32_t>(rv)));
+  if (mTransaction && mTransaction->ProxyConnectFailed()) {
+    return ProcessFailedProxyConnect(mRedirectType);
+  }
+  return ProcessNormal();
+}
+
+nsresult nsHttpChannel::ProcessNormal() {
+  LOG(("nsHttpChannel::ProcessNormal [this=%p]\n", this));
+
+  return ContinueProcessNormal(NS_OK);
+}
+
+nsresult nsHttpChannel::ContinueProcessNormal(nsresult rv) {
+  LOG(("nsHttpChannel::ContinueProcessNormal [this=%p]", this));
+
+  if (NS_FAILED(rv)) {
+    // Fill the failure status here, we have failed to fall back, thus we
+    // have to report our status as failed.
+    mStatus = rv;
+    DoNotifyListener();
+    return rv;
+  }
+
+  rv = ProcessCrossOriginSecurityHeaders();
+  if (NS_FAILED(rv)) {
+    mStatus = rv;
+    HandleAsyncAbort();
+    return rv;
+  }
+
+  // if we're here, then any byte-range requests failed to result in a partial
+  // response.  we must clear this flag to prevent BufferPartialContent from
+  // being called inside our OnDataAvailable (see bug 136678).
+  StoreCachedContentIsPartial(false);
+
+  ClearBogusContentEncodingIfNeeded();
+
+  UpdateInhibitPersistentCachingFlag();
+
+  MaybeCreateCacheEntryWhenRCWN();
+
+  // this must be called before firing OnStartRequest, since http clients,
+  // such as imagelib, expect our cache entry to already have the correct
+  // expiration time (bug 87710).
+  if (mCacheEntry) {
+    rv = InitCacheEntry();
+    if (NS_FAILED(rv)) CloseCacheEntry(true);
+  }
+
+  // Check that the server sent us what we were asking for
+  if (LoadResuming()) {
+    // Create an entity id from the response
+    nsAutoCString id;
+    rv = GetEntityID(id);
+    if (NS_FAILED(rv)) {
+      // If creating an entity id is not possible -> error
+      Cancel(NS_ERROR_NOT_RESUMABLE);
+    } else if (mResponseHead->Status() != 206 &&
+               mResponseHead->Status() != 200) {
+      // Probably 404 Not Found, 412 Precondition Failed or
+      // 416 Invalid Range -> error
+      LOG(("Unexpected response status while resuming, aborting [this=%p]\n",
+           this));
+      Cancel(NS_ERROR_ENTITY_CHANGED);
+    }
+    // If we were passed an entity id, verify it's equal to the server's
+    else if (!mEntityID.IsEmpty()) {
+      if (!mEntityID.Equals(id)) {
+        LOG(("Entity mismatch, expected '%s', got '%s', aborting [this=%p]",
+             mEntityID.get(), id.get(), this));
+        Cancel(NS_ERROR_ENTITY_CHANGED);
+      }
+    }
+  }
+
+  rv = CallOnStartRequest();
+  if (NS_FAILED(rv)) return rv;
+
+  // install cache listener if we still have a cache entry open
+  if (mCacheEntry && !LoadCacheEntryIsReadOnly()) {
+    rv = InstallCacheListener();
+    if (NS_FAILED(rv)) return rv;
+  }
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::PromptTempRedirect() {
+  if (!gHttpHandler->PromptTempRedirect()) {
+    return NS_OK;
+  }
+  nsresult rv;
+  nsCOMPtr<nsIStringBundleService> bundleService =
+      do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv);
+  if (NS_FAILED(rv)) return rv;
+
+  nsCOMPtr<nsIStringBundle> stringBundle;
+  rv =
+      bundleService->CreateBundle(NECKO_MSGS_URL, getter_AddRefs(stringBundle));
+  if (NS_FAILED(rv)) return rv;
+
+  nsAutoString messageString;
+  rv = stringBundle->GetStringFromName("RepostFormData", messageString);
+  if (NS_SUCCEEDED(rv)) {
+    bool repost = false;
+
+    nsCOMPtr<nsIPrompt> prompt;
+    GetCallback(prompt);
+    if (!prompt) return NS_ERROR_NO_INTERFACE;
+
+    prompt->Confirm(nullptr, messageString.get(), &repost);
+    if (!repost) return NS_ERROR_FAILURE;
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::ProxyFailover() {
+  LOG(("nsHttpChannel::ProxyFailover [this=%p]\n", this));
+
+  nsresult rv;
+
+  nsCOMPtr<nsIProtocolProxyService> pps =
+      do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv)) return rv;
+
+  nsCOMPtr<nsIProxyInfo> pi;
+  rv = pps->GetFailoverForProxy(mConnectionInfo->ProxyInfo(), mURI, mStatus,
+                                getter_AddRefs(pi));
+#ifdef MOZ_PROXY_DIRECT_FAILOVER
+  if (NS_FAILED(rv)) {
+    if (!StaticPrefs::network_proxy_failover_direct()) {
+      return rv;
+    }
+    // If this request used a failed proxy and there is no failover available,
+    // fallback to DIRECT connections for conservative requests.
+    if (LoadBeConservative()) {
+      rv = pps->NewProxyInfo("direct"_ns, ""_ns, 0, ""_ns, ""_ns, 0, UINT32_MAX,
+                             nullptr, getter_AddRefs(pi));
+    }
+#endif
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+#ifdef MOZ_PROXY_DIRECT_FAILOVER
+  }
+#endif
+
+  // XXXbz so where does this codepath remove us from the loadgroup,
+  // exactly?
+  return AsyncDoReplaceWithProxy(pi);
+}
+
+void nsHttpChannel::SetHTTPSSVCRecord(
+    already_AddRefed<nsIDNSHTTPSSVCRecord>&& aRecord) {
+  LOG(("nsHttpChannel::SetHTTPSSVCRecord [this=%p]\n", this));
+  nsCOMPtr<nsIDNSHTTPSSVCRecord> record = aRecord;
+  MOZ_ASSERT(!mHTTPSSVCRecord);
+  mHTTPSSVCRecord.emplace(std::move(record));
+}
+
+void nsHttpChannel::HandleAsyncRedirectChannelToHttps() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume to do async redirect to https [this=%p]\n",
+         this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->HandleAsyncRedirectChannelToHttps();
+      return NS_OK;
+    };
+    return;
+  }
+
+  nsresult rv = StartRedirectChannelToHttps();
+  if (NS_FAILED(rv)) {
+    rv = ContinueAsyncRedirectChannelToURI(rv);
+    if (NS_FAILED(rv)) {
+      LOG(("ContinueAsyncRedirectChannelToURI failed (%08x) [this=%p]\n",
+           static_cast<uint32_t>(rv), this));
+    }
+  }
+}
+
+nsresult nsHttpChannel::StartRedirectChannelToHttps() {
+  LOG(("nsHttpChannel::HandleAsyncRedirectChannelToHttps() [STS]\n"));
+
+  nsCOMPtr<nsIURI> upgradedURI;
+  nsresult rv = NS_GetSecureUpgradedURI(mURI, getter_AddRefs(upgradedURI));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return StartRedirectChannelToURI(
+      upgradedURI, nsIChannelEventSink::REDIRECT_PERMANENT |
+                       nsIChannelEventSink::REDIRECT_STS_UPGRADE);
+}
+
+void nsHttpChannel::HandleAsyncAPIRedirect() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+  MOZ_ASSERT(mAPIRedirectToURI, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume to do async API redirect [this=%p]\n", this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->HandleAsyncAPIRedirect();
+      return NS_OK;
+    };
+    return;
+  }
+
+  nsresult rv = StartRedirectChannelToURI(
+      mAPIRedirectToURI, nsIChannelEventSink::REDIRECT_PERMANENT);
+  if (NS_FAILED(rv)) {
+    rv = ContinueAsyncRedirectChannelToURI(rv);
+    if (NS_FAILED(rv)) {
+      LOG(("ContinueAsyncRedirectChannelToURI failed (%08x) [this=%p]\n",
+           static_cast<uint32_t>(rv), this));
+    }
+  }
+}
+
+void nsHttpChannel::HandleAsyncRedirectToUnstrippedURI() {
+  MOZ_ASSERT(!mCallOnResume, "How did that happen?");
+
+  if (mSuspendCount) {
+    LOG(
+        ("Waiting until resume to do async redirect to unstripped URI "
+         "[this=%p]\n",
+         this));
+    mCallOnResume = [](nsHttpChannel* self) {
+      self->HandleAsyncRedirectToUnstrippedURI();
+      return NS_OK;
+    };
+    return;
+  }
+
+  nsCOMPtr<nsIURI> unstrippedURI;
+  mLoadInfo->GetUnstrippedURI(getter_AddRefs(unstrippedURI));
+
+  // Clear the unstripped URI from the loadInfo before starting redirect in case
+  // endless redirect.
+  mLoadInfo->SetUnstrippedURI(nullptr);
+
+  nsresult rv = StartRedirectChannelToURI(
+      unstrippedURI, nsIChannelEventSink::REDIRECT_PERMANENT);
+
+  if (NS_FAILED(rv)) {
+    rv = ContinueAsyncRedirectChannelToURI(rv);
+    if (NS_FAILED(rv)) {
+      LOG(("ContinueAsyncRedirectChannelToURI failed (%08x) [this=%p]\n",
+           static_cast<uint32_t>(rv), this));
+    }
+  }
+}
+
+nsresult nsHttpChannel::StartRedirectChannelToURI(nsIURI* upgradedURI,
+                                                  uint32_t flags) {
+  nsresult rv = NS_OK;
+  LOG(("nsHttpChannel::StartRedirectChannelToURI()\n"));
+
+  nsCOMPtr<nsIChannel> newChannel;
+  nsCOMPtr<nsILoadInfo> redirectLoadInfo =
+      CloneLoadInfoForRedirect(upgradedURI, flags);
+
+  nsCOMPtr<nsIIOService> ioService;
+  rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = NS_NewChannelInternal(getter_AddRefs(newChannel), upgradedURI,
+                             redirectLoadInfo,
+                             nullptr,  // PerformanceStorage
+                             nullptr,  // aLoadGroup
+                             nullptr,  // aCallbacks
+                             nsIRequest::LOAD_NORMAL, ioService);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = SetupReplacementChannel(upgradedURI, newChannel, true, flags);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (mHTTPSSVCRecord) {
+    RefPtr<nsHttpChannel> httpChan = do_QueryObject(newChannel);
+    nsCOMPtr<nsIDNSHTTPSSVCRecord> rec = mHTTPSSVCRecord.ref();
+    if (httpChan && rec) {
+      httpChan->SetHTTPSSVCRecord(rec.forget());
+    }
+  }
+
+  // Inform consumers about this fake redirect
+  mRedirectChannel = newChannel;
+
+  PushRedirectAsyncFunc(&nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+  rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
+
+  if (NS_SUCCEEDED(rv)) rv = WaitForRedirectCallback();
+
+  if (NS_FAILED(rv)) {
+    AutoRedirectVetoNotifier notifier(this, rv);
+
+    /* Remove the async call to ContinueAsyncRedirectChannelToURI().
+     * It is called directly by our callers upon return (to clean up
+     * the failed redirect). */
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::ContinueAsyncRedirectChannelToURI(nsresult rv) {
+  LOG(("nsHttpChannel::ContinueAsyncRedirectChannelToURI [this=%p]", this));
+
+  // Since we handle mAPIRedirectToURI also after on-examine-response handler
+  // rather drop it here to avoid any redirect loops, even just hypothetical.
+  mAPIRedirectToURI = nullptr;
+
+  if (NS_SUCCEEDED(rv)) {
+    rv = OpenRedirectChannel(rv);
+  }
+
+  if (NS_FAILED(rv)) {
+    // Cancel the channel here, the update to https had been vetoed
+    // but from the security reasons we have to discard the whole channel
+    // load.
+    Cancel(rv);
+  }
+
+  if (mLoadGroup) {
+    mLoadGroup->RemoveRequest(this, nullptr, mStatus);
+  }
+
+  if (NS_FAILED(rv) && !mCachePump && !mTransactionPump) {
+    // We have to manually notify the listener because there is not any pump
+    // that would call our OnStart/StopRequest after resume from waiting for
+    // the redirect callback.
+    DoNotifyListener();
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::OpenRedirectChannel(nsresult rv) {
+  AutoRedirectVetoNotifier notifier(this, rv);
+
+  // Make sure to do this after we received redirect veto answer,
+  // i.e. after all sinks had been notified
+  mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+  // open new channel
+  rv = mRedirectChannel->AsyncOpen(mListener);
+
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mStatus = NS_BINDING_REDIRECTED;
+
+  notifier.RedirectSucceeded();
+
+  ReleaseListeners();
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::AsyncDoReplaceWithProxy(nsIProxyInfo* pi) {
+  LOG(("nsHttpChannel::AsyncDoReplaceWithProxy [this=%p pi=%p]", this, pi));
+  nsresult rv;
+
+  nsCOMPtr<nsIChannel> newChannel;
+  rv = gHttpHandler->NewProxiedChannel(mURI, pi, mProxyResolveFlags, mProxyURI,
+                                       mLoadInfo, getter_AddRefs(newChannel));
+  if (NS_FAILED(rv)) return rv;
+
+  uint32_t flags = nsIChannelEventSink::REDIRECT_INTERNAL;
+
+  rv = SetupReplacementChannel(mURI, newChannel, true, flags);
+  if (NS_FAILED(rv)) return rv;
+
+  // Inform consumers about this fake redirect
+  mRedirectChannel = newChannel;
+
+  PushRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
+  rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
+
+  if (NS_SUCCEEDED(rv)) rv = WaitForRedirectCallback();
+
+  if (NS_FAILED(rv)) {
+    AutoRedirectVetoNotifier notifier(this, rv);
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::ContinueDoReplaceWithProxy(nsresult rv) {
+  AutoRedirectVetoNotifier notifier(this, rv);
+
+  if (NS_FAILED(rv)) return rv;
+
+  MOZ_ASSERT(mRedirectChannel, "No redirect channel?");
+
+  // Make sure to do this after we received redirect veto answer,
+  // i.e. after all sinks had been notified
+  mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+  // open new channel
+  rv = mRedirectChannel->AsyncOpen(mListener);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mStatus = NS_BINDING_REDIRECTED;
+
+  notifier.RedirectSucceeded();
+
+  ReleaseListeners();
+
+  return rv;
+}
+
+nsresult nsHttpChannel::ResolveProxy() {
+  LOG(("nsHttpChannel::ResolveProxy [this=%p]\n", this));
+
+  nsresult rv;
+
+  nsCOMPtr<nsIProtocolProxyService> pps =
+      do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv)) return rv;
+
+  // using the nsIProtocolProxyService2 allows a minor performance
+  // optimization, but if an add-on has only provided the original interface
+  // then it is ok to use that version.
+  nsCOMPtr<nsIProtocolProxyService2> pps2 = do_QueryInterface(pps);
+  if (pps2) {
+    rv = pps2->AsyncResolve2(this, mProxyResolveFlags, this, nullptr,
+                             getter_AddRefs(mProxyRequest));
+  } else {
+    rv = pps->AsyncResolve(static_cast<nsIChannel*>(this), mProxyResolveFlags,
+                           this, nullptr, getter_AddRefs(mProxyRequest));
+  }
+
+  return rv;
+}
+
+bool nsHttpChannel::ResponseWouldVary(nsICacheEntry* entry) {
+  nsresult rv;
+  nsAutoCString buf, metaKey;
+  Unused << mCachedResponseHead->GetHeader(nsHttp::Vary, buf);
+
+  constexpr auto prefix = "request-"_ns;
+
+  // enumerate the elements of the Vary header...
+  for (const nsACString& token :
+       nsCCharSeparatedTokenizer(buf, NS_HTTP_HEADER_SEP).ToRange()) {
+    LOG(
+        ("nsHttpChannel::ResponseWouldVary [channel=%p] "
+         "processing %s\n",
+         this, nsPromiseFlatCString(token).get()));
+    //
+    // if "*", then assume response would vary.  technically speaking,
+    // "Vary: header, *" is not permitted, but we allow it anyways.
+    //
+    // We hash values of cookie-headers for the following reasons:
+    //
+    //   1- cookies can be very large in size
+    //
+    //   2- cookies may contain sensitive information.  (for parity with
+    //      out policy of not storing Set-cookie headers in the cache
+    //      meta data, we likewise do not want to store cookie headers
+    //      here.)
+    //
+    if (token.EqualsLiteral("*")) {
+      return true;  // if we encounter this, just get out of here
+    }
+
+    // build cache meta data key...
+    metaKey = prefix + token;
+
+    // check the last value of the given request header to see if it has
+    // since changed.  if so, then indeed the cached response is invalid.
+    nsCString lastVal;
+    entry->GetMetaDataElement(metaKey.get(), getter_Copies(lastVal));
+    LOG(
+        ("nsHttpChannel::ResponseWouldVary [channel=%p] "
+         "stored value = \"%s\"\n",
+         this, lastVal.get()));
+
+    // Look for value of "Cookie" in the request headers
+    nsHttpAtom atom = nsHttp::ResolveAtom(token);
+    nsAutoCString newVal;
+    bool hasHeader = NS_SUCCEEDED(mRequestHead.GetHeader(atom, newVal));
+    if (!lastVal.IsEmpty()) {
+      // value for this header in cache, but no value in request
+      if (!hasHeader) {
+        return true;  // yes - response would vary
+      }
+
+      // If this is a cookie-header, stored metadata is not
+      // the value itself but the hash. So we also hash the
+      // outgoing value here in order to compare the hashes
+      nsAutoCString hash;
+      if (atom == nsHttp::Cookie) {
+        rv = Hash(newVal.get(), hash);
+        // If hash failed, be conservative (the cached hash
+        // exists at this point) and claim response would vary
+        if (NS_FAILED(rv)) return true;
+        newVal = hash;
+
+        LOG(
+            ("nsHttpChannel::ResponseWouldVary [this=%p] "
+             "set-cookie value hashed to %s\n",
+             this, newVal.get()));
+      }
+
+      if (!newVal.Equals(lastVal)) {
+        return true;  // yes, response would vary
+      }
+
+    } else if (hasHeader) {  // old value is empty, but newVal is set
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// We need to have an implementation of this function just so that we can keep
+// all references to mCallOnResume of type nsHttpChannel:  it's not OK in C++
+// to set a member function ptr to  a base class function.
+void nsHttpChannel::HandleAsyncAbort() {
+  HttpAsyncAborter<nsHttpChannel>::HandleAsyncAbort();
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <byte-range>
+//-----------------------------------------------------------------------------
+
+bool nsHttpChannel::IsResumable(int64_t partialLen, int64_t contentLength,
+                                bool ignoreMissingPartialLen) const {
+  bool hasContentEncoding =
+      mCachedResponseHead->HasHeader(nsHttp::Content_Encoding);
+
+  nsAutoCString etag;
+  Unused << mCachedResponseHead->GetHeader(nsHttp::ETag, etag);
+  bool hasWeakEtag = !etag.IsEmpty() && StringBeginsWith(etag, "W/"_ns);
+
+  return (partialLen < contentLength) &&
+         (partialLen > 0 || ignoreMissingPartialLen) && !hasContentEncoding &&
+         !hasWeakEtag && mCachedResponseHead->IsResumable() &&
+         !LoadCustomConditionalRequest() && !mCachedResponseHead->NoStore();
+}
+
+nsresult nsHttpChannel::MaybeSetupByteRangeRequest(
+    int64_t partialLen, int64_t contentLength, bool ignoreMissingPartialLen) {
+  // Be pesimistic
+  StoreIsPartialRequest(false);
+
+  if (!IsResumable(partialLen, contentLength, ignoreMissingPartialLen)) {
+    return NS_ERROR_NOT_RESUMABLE;
+  }
+
+  // looks like a partial entry we can reuse; add If-Range
+  // and Range headers.
+  nsresult rv = SetupByteRangeRequest(partialLen);
+  if (NS_FAILED(rv)) {
+    // Make the request unconditional again.
+    UntieByteRangeRequest();
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::SetupByteRangeRequest(int64_t partialLen) {
+  // cached content has been found to be partial, add necessary request
+  // headers to complete cache entry.
+
+  // use strongest validator available...
+  nsAutoCString val;
+  Unused << mCachedResponseHead->GetHeader(nsHttp::ETag, val);
+  if (val.IsEmpty()) {
+    Unused << mCachedResponseHead->GetHeader(nsHttp::Last_Modified, val);
+  }
+  if (val.IsEmpty()) {
+    // if we hit this code it means mCachedResponseHead->IsResumable() is
+    // either broken or not being called.
+    MOZ_ASSERT_UNREACHABLE("no cache validator");
+    StoreIsPartialRequest(false);
+    return NS_ERROR_FAILURE;
+  }
+
+  char buf[64];
+  SprintfLiteral(buf, "bytes=%" PRId64 "-", partialLen);
+
+  DebugOnly<nsresult> rv{};
+  rv = mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(buf));
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  rv = mRequestHead.SetHeader(nsHttp::If_Range, val);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  StoreIsPartialRequest(true);
+
+  return NS_OK;
+}
+
+void nsHttpChannel::UntieByteRangeRequest() {
+  DebugOnly<nsresult> rv{};
+  rv = mRequestHead.ClearHeader(nsHttp::Range);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  rv = mRequestHead.ClearHeader(nsHttp::If_Range);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+}
+
+nsresult nsHttpChannel::ProcessPartialContent(
+    const std::function<nsresult(nsHttpChannel*, nsresult)>&
+        aContinueProcessResponseFunc) {
+  // ok, we've just received a 206
+  //
+  // we need to stream whatever data is in the cache out first, and then
+  // pick up whatever data is on the wire, writing it into the cache.
+
+  LOG(("nsHttpChannel::ProcessPartialContent [this=%p]\n", this));
+
+  NS_ENSURE_TRUE(mCachedResponseHead, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_NOT_INITIALIZED);
+
+  // Make sure to clear bogus content-encodings before looking at the header
+  ClearBogusContentEncodingIfNeeded();
+
+  // Check if the content-encoding we now got is different from the one we
+  // got before
+  nsAutoCString contentEncoding, cachedContentEncoding;
+  // It is possible that there is not such headers
+  Unused << mResponseHead->GetHeader(nsHttp::Content_Encoding, contentEncoding);
+  Unused << mCachedResponseHead->GetHeader(nsHttp::Content_Encoding,
+                                           cachedContentEncoding);
+  if (nsCRT::strcasecmp(contentEncoding.get(), cachedContentEncoding.get()) !=
+      0) {
+    Cancel(NS_ERROR_INVALID_CONTENT_ENCODING);
+    return CallOnStartRequest();
+  }
+
+  nsresult rv;
+
+  int64_t cachedContentLength = mCachedResponseHead->ContentLength();
+  int64_t entitySize = mResponseHead->TotalEntitySize();
+
+  nsAutoCString contentRange;
+  Unused << mResponseHead->GetHeader(nsHttp::Content_Range, contentRange);
+  LOG(
+      ("nsHttpChannel::ProcessPartialContent [this=%p trans=%p] "
+       "original content-length %" PRId64 ", entity-size %" PRId64
+       ", content-range %s\n",
+       this, mTransaction.get(), cachedContentLength, entitySize,
+       contentRange.get()));
+
+  if ((entitySize >= 0) && (cachedContentLength >= 0) &&
+      (entitySize != cachedContentLength)) {
+    LOG(
+        ("nsHttpChannel::ProcessPartialContent [this=%p] "
+         "206 has different total entity size than the content length "
+         "of the original partially cached entity.\n",
+         this));
+
+    mCacheEntry->AsyncDoom(nullptr);
+    Cancel(NS_ERROR_CORRUPTED_CONTENT);
+    return CallOnStartRequest();
+  }
+
+  if (LoadConcurrentCacheAccess()) {
+    // We started to read cached data sooner than its write has been done.
+    // But the concurrent write has not finished completely, so we had to
+    // do a range request.  Now let the content coming from the network
+    // be presented to consumers and also stored to the cache entry.
+
+    rv = InstallCacheListener(mLogicalOffset);
+    if (NS_FAILED(rv)) return rv;
+  } else {
+    // suspend the current transaction
+    rv = mTransactionPump->Suspend();
+    if (NS_FAILED(rv)) return rv;
+  }
+
+  // merge any new headers with the cached response headers
+  mCachedResponseHead->UpdateHeaders(mResponseHead.get());
+
+  // update the cached response head
+  nsAutoCString head;
+  mCachedResponseHead->Flatten(head, true);
+  rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
+  if (NS_FAILED(rv)) return rv;
+
+  // make the cached response be the current response
+  mResponseHead = std::move(mCachedResponseHead);
+
+  UpdateInhibitPersistentCachingFlag();
+
+  rv = UpdateExpirationTime();
+  if (NS_FAILED(rv)) return rv;
+
+  // notify observers interested in looking at a response that has been
+  // merged with any cached headers (http-on-examine-merged-response).
+  gHttpHandler->OnExamineMergedResponse(this);
+
+  if (LoadConcurrentCacheAccess()) {
+    StoreCachedContentIsPartial(false);
+    // Leave the ConcurrentCacheAccess flag set, we want to use it
+    // to prevent duplicate OnStartRequest call on the target listener
+    // in case this channel is canceled before it gets its OnStartRequest
+    // from the http transaction.
+    return rv;
+  }
+
+  // Now we continue reading the network response.
+  // the cached content is valid, although incomplete.
+  mCachedContentIsValid = true;
+  return CallOrWaitForResume([aContinueProcessResponseFunc](auto* self) {
+    nsresult rv = self->ReadFromCache(false);
+    return aContinueProcessResponseFunc(self, rv);
+  });
+}
+
+nsresult nsHttpChannel::OnDoneReadingPartialCacheEntry(bool* streamDone) {
+  nsresult rv;
+
+  LOG(("nsHttpChannel::OnDoneReadingPartialCacheEntry [this=%p]", this));
+
+  // by default, assume we would have streamed all data or failed...
+  *streamDone = true;
+
+  // setup cache listener to append to cache entry
+  int64_t size;
+  rv = mCacheEntry->GetDataSize(&size);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = InstallCacheListener(size);
+  if (NS_FAILED(rv)) return rv;
+
+  // Entry is valid, do it now, after the output stream has been opened,
+  // otherwise when done earlier, pending readers would consider the cache
+  // entry still as partial (CacheEntry::GetDataSize would return the partial
+  // data size) and consumers would do the conditional request again.
+  rv = mCacheEntry->SetValid();
+  if (NS_FAILED(rv)) return rv;
+
+  // need to track the logical offset of the data being sent to our listener
+  mLogicalOffset = size;
+
+  // we're now completing the cached content, so we can clear this flag.
+  // this puts us in the state of a regular download.
+  StoreCachedContentIsPartial(false);
+  // The cache input stream pump is finished, we do not need it any more.
+  // (see bug 1313923)
+  mCachePump = nullptr;
+
+  // resume the transaction if it exists, otherwise the pipe contained the
+  // remaining part of the document and we've now streamed all of the data.
+  if (mTransactionPump) {
+    rv = mTransactionPump->Resume();
+    if (NS_SUCCEEDED(rv)) *streamDone = false;
+  } else {
+    MOZ_ASSERT_UNREACHABLE("no transaction");
+  }
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <cache>
+//-----------------------------------------------------------------------------
+
+bool nsHttpChannel::ShouldBypassProcessNotModified() {
+  if (LoadCustomConditionalRequest()) {
+    LOG(("Bypassing ProcessNotModified due to custom conditional headers"));
+    return true;
+  }
+
+  if (!mDidReval) {
+    LOG(
+        ("Server returned a 304 response even though we did not send a "
+         "conditional request"));
+    return true;
+  }
+
+  return false;
+}
+
+nsresult nsHttpChannel::ProcessNotModified(
+    const std::function<nsresult(nsHttpChannel*, nsresult)>&
+        aContinueProcessResponseFunc) {
+  nsresult rv;
+
+  LOG(("nsHttpChannel::ProcessNotModified [this=%p]\n", this));
+
+  // Assert ShouldBypassProcessNotModified() has been checked before call to
+  // ProcessNotModified().
+  MOZ_ASSERT(!ShouldBypassProcessNotModified());
+
+  MOZ_ASSERT(mCachedResponseHead);
+  MOZ_ASSERT(mCacheEntry);
+  NS_ENSURE_TRUE(mCachedResponseHead && mCacheEntry, NS_ERROR_UNEXPECTED);
+
+  // If the 304 response contains a Last-Modified different than the
+  // one in our cache that is pretty suspicious and is, in at least the
+  // case of bug 716840, a sign of the server having previously corrupted
+  // our cache with a bad response. Take the minor step here of just dooming
+  // that cache entry so there is a fighting chance of getting things on the
+  // right track.
+
+  nsAutoCString lastModifiedCached;
+  nsAutoCString lastModified304;
+
+  rv =
+      mCachedResponseHead->GetHeader(nsHttp::Last_Modified, lastModifiedCached);
+  if (NS_SUCCEEDED(rv)) {
+    rv = mResponseHead->GetHeader(nsHttp::Last_Modified, lastModified304);
+  }
+
+  if (NS_SUCCEEDED(rv) && !lastModified304.Equals(lastModifiedCached)) {
+    LOG(
+        ("Cache Entry and 304 Last-Modified Headers Do Not Match "
+         "[%s] and [%s]\n",
+         lastModifiedCached.get(), lastModified304.get()));
+
+    mCacheEntry->AsyncDoom(nullptr);
+    Telemetry::Accumulate(Telemetry::CACHE_LM_INCONSISTENT, true);
+  }
+
+  // merge any new headers with the cached response headers
+  mCachedResponseHead->UpdateHeaders(mResponseHead.get());
+
+  // update the cached response head
+  nsAutoCString head;
+  mCachedResponseHead->Flatten(head, true);
+  rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
+  if (NS_FAILED(rv)) return rv;
+
+  // make the cached response be the current response
+  mResponseHead = std::move(mCachedResponseHead);
+
+  UpdateInhibitPersistentCachingFlag();
+
+  rv = UpdateExpirationTime();
+  if (NS_FAILED(rv)) return rv;
+
+  rv = AddCacheEntryHeaders(mCacheEntry);
+  if (NS_FAILED(rv)) return rv;
+
+  // notify observers interested in looking at a reponse that has been
+  // merged with any cached headers
+  gHttpHandler->OnExamineMergedResponse(this);
+
+  mCachedContentIsValid = true;
+
+  // Tell other consumers the entry is OK to use
+  rv = mCacheEntry->SetValid();
+  if (NS_FAILED(rv)) return rv;
+
+  return CallOrWaitForResume([aContinueProcessResponseFunc](auto* self) {
+    nsresult rv = self->ReadFromCache(false);
+    return aContinueProcessResponseFunc(self, rv);
+  });
+}
+
+// Determines if a request is a byte range request for a subrange,
+// i.e. is a byte range request, but not a 0- byte range request.
+static bool IsSubRangeRequest(nsHttpRequestHead& aRequestHead) {
+  nsAutoCString byteRange;
+  if (NS_FAILED(aRequestHead.GetHeader(nsHttp::Range, byteRange))) {
+    return false;
+  }
+  return !byteRange.EqualsLiteral("bytes=0-");
+}
+
+nsresult nsHttpChannel::OpenCacheEntry(bool isHttps) {
+  // Drop this flag here
+  StoreConcurrentCacheAccess(0);
+
+  LOG(("nsHttpChannel::OpenCacheEntry [this=%p]", this));
+
+  // make sure we're not abusing this function
+  MOZ_ASSERT(!mCacheEntry, "cache entry already open");
+
+  if (mRequestHead.IsPost()) {
+    // If the post id is already set then this is an attempt to replay
+    // a post transaction via the cache.  Otherwise, we need a unique
+    // post id for this transaction.
+    if (mPostID == 0) mPostID = gHttpHandler->GenerateUniqueID();
+  } else if (!mRequestHead.IsGet() && !mRequestHead.IsHead()) {
+    // don't use the cache for other types of requests
+    return NS_OK;
+  }
+
+  return OpenCacheEntryInternal(isHttps);
+}
+
+nsresult nsHttpChannel::OpenCacheEntryInternal(bool isHttps) {
+  nsresult rv;
+
+  if (LoadResuming()) {
+    // We don't support caching for requests initiated
+    // via nsIResumableChannel.
+    return NS_OK;
+  }
+
+  // Don't cache byte range requests which are subranges, only cache 0-
+  // byte range requests.
+  if (IsSubRangeRequest(mRequestHead)) {
+    return NS_OK;
+  }
+
+  // Handle correctly WaitForCacheEntry
+  AutoCacheWaitFlags waitFlags(this);
+
+  nsAutoCString cacheKey;
+
+  nsCOMPtr<nsICacheStorageService> cacheStorageService(
+      components::CacheStorage::Service());
+  if (!cacheStorageService) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsCOMPtr<nsICacheStorage> cacheStorage;
+  mCacheEntryURI = mURI;
+
+  RefPtr<LoadContextInfo> info = GetLoadContextInfo(this);
+  if (!info) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uint32_t cacheEntryOpenFlags;
+  bool offline = gIOService->IsOffline();
+
+  bool maybeRCWN = false;
+
+  nsAutoCString cacheControlRequestHeader;
+  Unused << mRequestHead.GetHeader(nsHttp::Cache_Control,
+                                   cacheControlRequestHeader);
+  CacheControlParser cacheControlRequest(cacheControlRequestHeader);
+  if (cacheControlRequest.NoStore()) {
+    return NS_OK;
+  }
+
+  if (offline || (mLoadFlags & INHIBIT_CACHING)) {
+    if (BYPASS_LOCAL_CACHE(mLoadFlags, LoadPreferCacheLoadOverBypass()) &&
+        !offline) {
+      return NS_OK;
+    }
+    cacheEntryOpenFlags = nsICacheStorage::OPEN_READONLY;
+    StoreCacheEntryIsReadOnly(true);
+  } else if (BYPASS_LOCAL_CACHE(mLoadFlags, LoadPreferCacheLoadOverBypass())) {
+    cacheEntryOpenFlags = nsICacheStorage::OPEN_TRUNCATE;
+  } else {
+    cacheEntryOpenFlags =
+        nsICacheStorage::OPEN_NORMALLY | nsICacheStorage::CHECK_MULTITHREADED;
+  }
+
+  // Remember the request is a custom conditional request so that we can
+  // process any 304 response correctly.
+  StoreCustomConditionalRequest(
+      mRequestHead.HasHeader(nsHttp::If_Modified_Since) ||
+      mRequestHead.HasHeader(nsHttp::If_None_Match) ||
+      mRequestHead.HasHeader(nsHttp::If_Unmodified_Since) ||
+      mRequestHead.HasHeader(nsHttp::If_Match) ||
+      mRequestHead.HasHeader(nsHttp::If_Range));
+
+  if (mLoadFlags & INHIBIT_PERSISTENT_CACHING) {
+    rv = cacheStorageService->MemoryCacheStorage(
+        info,  // ? choose app cache as well...
+        getter_AddRefs(cacheStorage));
+  } else if (LoadPinCacheContent()) {
+    rv = cacheStorageService->PinningCacheStorage(info,
+                                                  getter_AddRefs(cacheStorage));
+  } else {
+    // Try to race only if we use disk cache storage
+    maybeRCWN = mRequestHead.IsSafeMethod();
+    rv = cacheStorageService->DiskCacheStorage(info,
+                                               getter_AddRefs(cacheStorage));
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if ((mClassOfService.Flags() & nsIClassOfService::Leader) ||
+      (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI)) {
+    cacheEntryOpenFlags |= nsICacheStorage::OPEN_PRIORITY;
+  }
+
+  // Only for backward compatibility with the old cache back end.
+  // When removed, remove the flags and related code snippets.
+  if (mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY) {
+    cacheEntryOpenFlags |= nsICacheStorage::OPEN_BYPASS_IF_BUSY;
+  }
+
+  if (mPostID) {
+    mCacheIdExtension.Append(nsPrintfCString("%d", mPostID));
+  }
+  if (LoadIsTRRServiceChannel()) {
+    mCacheIdExtension.Append("TRR");
+  }
+  if (mRequestHead.IsHead()) {
+    mCacheIdExtension.Append("HEAD");
+  }
+
+  mCacheOpenWithPriority = cacheEntryOpenFlags & nsICacheStorage::OPEN_PRIORITY;
+  mCacheQueueSizeWhenOpen =
+      CacheStorageService::CacheQueueSize(mCacheOpenWithPriority);
+
+  if ((mNetworkTriggerDelay || StaticPrefs::network_http_rcwn_enabled()) &&
+      maybeRCWN) {
+    bool hasAltData = false;
+    uint32_t sizeInKb = 0;
+    rv = cacheStorage->GetCacheIndexEntryAttrs(
+        mCacheEntryURI, mCacheIdExtension, &hasAltData, &sizeInKb);
+
+    // We will attempt to race the network vs the cache if we've found
+    // this entry in the cache index, and it has appropriate attributes
+    // (doesn't have alt-data, and has a small size)
+    if (NS_SUCCEEDED(rv) && !hasAltData &&
+        sizeInKb < StaticPrefs::network_http_rcwn_small_resource_size_kb()) {
+      MaybeRaceCacheWithNetwork();
+    }
+  }
+
+  if (!mCacheOpenDelay) {
+    MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread");
+    if (mNetworkTriggered) {
+      mRaceCacheWithNetwork = StaticPrefs::network_http_rcwn_enabled();
+    }
+    rv = cacheStorage->AsyncOpenURI(mCacheEntryURI, mCacheIdExtension,
+                                    cacheEntryOpenFlags, this);
+  } else {
+    // We pass `this` explicitly as a parameter due to the raw pointer
+    // to refcounted object in lambda analysis.
+    mCacheOpenFunc = [cacheEntryOpenFlags,
+                      cacheStorage](nsHttpChannel* self) -> void {
+      MOZ_ASSERT(NS_IsMainThread(), "Should be called on the main thread");
+      cacheStorage->AsyncOpenURI(self->mCacheEntryURI, self->mCacheIdExtension,
+                                 cacheEntryOpenFlags, self);
+    };
+
+    // calls nsHttpChannel::Notify after `mCacheOpenDelay` milliseconds
+    auto callback = MakeRefPtr<TimerCallback>(this);
+    NS_NewTimerWithCallback(getter_AddRefs(mCacheOpenTimer), callback,
+                            mCacheOpenDelay, nsITimer::TYPE_ONE_SHOT);
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  waitFlags.Keep(WAIT_FOR_CACHE_ENTRY);
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::CheckPartial(nsICacheEntry* aEntry, int64_t* aSize,
+                                     int64_t* aContentLength) {
+  return nsHttp::CheckPartial(
+      aEntry, aSize, aContentLength,
+      mCachedResponseHead ? mCachedResponseHead.get() : mResponseHead.get());
+}
+
+void nsHttpChannel::UntieValidationRequest() {
+  DebugOnly<nsresult> rv{};
+  // Make the request unconditional again.
+  rv = mRequestHead.ClearHeader(nsHttp::If_Modified_Since);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  rv = mRequestHead.ClearHeader(nsHttp::If_None_Match);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+  rv = mRequestHead.ClearHeader(nsHttp::ETag);
+  MOZ_ASSERT(NS_SUCCEEDED(rv));
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnCacheEntryCheck(nsICacheEntry* entry, uint32_t* aResult) {
+  nsresult rv = NS_OK;
+
+  LOG(("nsHttpChannel::OnCacheEntryCheck enter [channel=%p entry=%p]", this,
+       entry));
+
+  mozilla::MutexAutoLock lock(mRCWNLock);
+
+  if (mRaceCacheWithNetwork && mFirstResponseSource == RESPONSE_FROM_NETWORK) {
+    LOG(
+        ("Not using cached response because we've already got one from the "
+         "network\n"));
+    *aResult = ENTRY_NOT_WANTED;
+
+    // Net-win indicates that mOnStartRequestTimestamp is from net.
+    int64_t savedTime =
+        (TimeStamp::Now() - mOnStartRequestTimestamp).ToMilliseconds();
+    Telemetry::Accumulate(Telemetry::NETWORK_RACE_CACHE_WITH_NETWORK_SAVED_TIME,
+                          savedTime);
+    return NS_OK;
+  }
+  if (mRaceCacheWithNetwork && mFirstResponseSource == RESPONSE_PENDING) {
+    mOnCacheEntryCheckTimestamp = TimeStamp::Now();
+  }
+
+  nsAutoCString cacheControlRequestHeader;
+  Unused << mRequestHead.GetHeader(nsHttp::Cache_Control,
+                                   cacheControlRequestHeader);
+  CacheControlParser cacheControlRequest(cacheControlRequestHeader);
+
+  if (cacheControlRequest.NoStore()) {
+    LOG(
+        ("Not using cached response based on no-store request cache "
+         "directive\n"));
+    *aResult = ENTRY_NOT_WANTED;
+    return NS_OK;
+  }
+
+  // Be pessimistic: assume the cache entry has no useful data.
+  *aResult = ENTRY_WANTED;
+  mCachedContentIsValid = false;
+
+  nsCString buf;
+
+  // Get the method that was used to generate the cached response
+  rv = entry->GetMetaDataElement("request-method", getter_Copies(buf));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  bool methodWasHead = buf.EqualsLiteral("HEAD");
+  bool methodWasGet = buf.EqualsLiteral("GET");
+
+  if (methodWasHead) {
+    // The cached response does not contain an entity.  We can only reuse
+    // the response if the current request is also HEAD.
+    if (!mRequestHead.IsHead()) {
+      *aResult = ENTRY_NOT_WANTED;
+      return NS_OK;
+    }
+  }
+  buf.Adopt(nullptr);
+
+  // We'll need this value in later computations...
+  uint32_t lastModifiedTime;
+  rv = entry->GetLastModified(&lastModifiedTime);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Determine if this is the first time that this cache entry
+  // has been accessed during this session.
+  bool fromPreviousSession =
+      (gHttpHandler->SessionStartTime() > lastModifiedTime);
+
+  // Get the cached HTTP response headers
+  mCachedResponseHead = MakeUnique<nsHttpResponseHead>();
+
+  rv = nsHttp::GetHttpResponseHeadFromCacheEntry(entry,
+                                                 mCachedResponseHead.get());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  bool isCachedRedirect = WillRedirect(*mCachedResponseHead);
+
+  // Do not return 304 responses from the cache, and also do not return
+  // any other non-redirect 3xx responses from the cache (see bug 759043).
+  NS_ENSURE_TRUE((mCachedResponseHead->Status() / 100 != 3) || isCachedRedirect,
+                 NS_ERROR_ABORT);
+
+  if (mCachedResponseHead->NoStore() && LoadCacheEntryIsReadOnly()) {
+    // This prevents loading no-store responses when navigating back
+    // while the browser is set to work offline.
+    LOG(("  entry loading as read-only but is no-store, set INHIBIT_CACHING"));
+    mLoadFlags |= nsIRequest::INHIBIT_CACHING;
+  }
+
+  // Don't bother to validate items that are read-only,
+  // unless they are read-only because of INHIBIT_CACHING
+  if ((LoadCacheEntryIsReadOnly() &&
+       !(mLoadFlags & nsIRequest::INHIBIT_CACHING))) {
+    int64_t size, contentLength;
+    rv = CheckPartial(entry, &size, &contentLength);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (contentLength != int64_t(-1) && contentLength != size) {
+      *aResult = ENTRY_NOT_WANTED;
+      return NS_OK;
+    }
+
+    rv = OpenCacheInputStream(entry, true);
+    if (NS_SUCCEEDED(rv)) {
+      mCachedContentIsValid = true;
+      entry->MaybeMarkValid();
+    }
+    return rv;
+  }
+
+  bool wantCompleteEntry = false;
+
+  if (!methodWasHead && !isCachedRedirect) {
+    // If the cached content-length is set and it does not match the data
+    // size of the cached content, then the cached response is partial...
+    // either we need to issue a byte range request or we need to refetch
+    // the entire document.
+    //
+    // We exclude redirects from this check because we (usually) strip the
+    // entity when we store the cache entry, and even if we didn't, we
+    // always ignore a cached redirect's entity anyway. See bug 759043.
+    int64_t size, contentLength;
+    rv = CheckPartial(entry, &size, &contentLength);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    if (size == int64_t(-1)) {
+      LOG(("  write is in progress"));
+      if (mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY) {
+        LOG(
+            ("  not interested in the entry, "
+             "LOAD_BYPASS_LOCAL_CACHE_IF_BUSY specified"));
+
+        *aResult = ENTRY_NOT_WANTED;
+        return NS_OK;
+      }
+
+      // Ignore !(size > 0) from the resumability condition
+      if (!IsResumable(size, contentLength, true)) {
+        if (IsNavigation()) {
+          LOG(
+              ("  bypassing wait for the entry, "
+               "this is a navigational load"));
+          *aResult = ENTRY_NOT_WANTED;
+          return NS_OK;
+        }
+
+        LOG(
+            ("  wait for entry completion, "
+             "response is not resumable"));
+
+        wantCompleteEntry = true;
+      } else {
+        StoreConcurrentCacheAccess(1);
+      }
+    } else if (contentLength != int64_t(-1) && contentLength != size) {
+      LOG(
+          ("Cached data size does not match the Content-Length header "
+           "[content-length=%" PRId64 " size=%" PRId64 "]\n",
+           contentLength, size));
+
+      rv = MaybeSetupByteRangeRequest(size, contentLength);
+      StoreCachedContentIsPartial(NS_SUCCEEDED(rv) && LoadIsPartialRequest());
+      if (LoadCachedContentIsPartial()) {
+        rv = OpenCacheInputStream(entry, false);
+        if (NS_FAILED(rv)) {
+          UntieByteRangeRequest();
+          return rv;
+        }
+
+        *aResult = ENTRY_NEEDS_REVALIDATION;
+        return NS_OK;
+      }
+
+      if (size == 0 && LoadCacheOnlyMetadata()) {
+        // Don't break cache entry load when the entry's data size
+        // is 0 and CacheOnlyMetadata flag is set. In that case we
+        // want to proceed since the LOAD_ONLY_IF_MODIFIED flag is
+        // also set.
+        MOZ_ASSERT(mLoadFlags & LOAD_ONLY_IF_MODIFIED);
+      } else {
+        return rv;
+      }
+    }
+  }
+
+  bool isHttps = mURI->SchemeIs("https");
+
+  bool doValidation = false;
+  bool doBackgroundValidation = false;
+  bool canAddImsHeader = true;
+
+  bool isForcedValid = false;
+  entry->GetIsForcedValid(&isForcedValid);
+  auto prefetchStatus = Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::Used;
+
+  bool weaklyFramed, isImmutable;
+  nsHttp::DetermineFramingAndImmutability(entry, mCachedResponseHead.get(),
+                                          isHttps, &weaklyFramed, &isImmutable);
+
+  // Cached entry is not the entity we request (see bug #633743)
+  if (ResponseWouldVary(entry)) {
+    LOG(("Validating based on Vary headers returning TRUE\n"));
+    canAddImsHeader = false;
+    doValidation = true;
+    prefetchStatus = Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::WouldVary;
+  } else {
+    if (mCachedResponseHead->ExpiresInPast() ||
+        mCachedResponseHead->MustValidateIfExpired()) {
+      prefetchStatus = Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::Expired;
+    }
+    doValidation = nsHttp::ValidationRequired(
+        isForcedValid, mCachedResponseHead.get(), mLoadFlags,
+        LoadAllowStaleCacheContent(), LoadForceValidateCacheContent(),
+        isImmutable, LoadCustomConditionalRequest(), mRequestHead, entry,
+        cacheControlRequest, fromPreviousSession, &doBackgroundValidation);
+  }
+
+  nsAutoCString requestedETag;
+  if (!doValidation &&
+      NS_SUCCEEDED(mRequestHead.GetHeader(nsHttp::If_Match, requestedETag)) &&
+      (methodWasGet || methodWasHead)) {
+    nsAutoCString cachedETag;
+    Unused << mCachedResponseHead->GetHeader(nsHttp::ETag, cachedETag);
+    if (!cachedETag.IsEmpty() && (StringBeginsWith(cachedETag, "W/"_ns) ||
+                                  !requestedETag.Equals(cachedETag))) {
+      // User has defined If-Match header, if the cached entry is not
+      // matching the provided header value or the cached ETag is weak,
+      // force validation.
+      doValidation = true;
+    }
+  }
+
+  // Previous error should not be propagated.
+  rv = NS_OK;
+
+  if (!doValidation) {
+    //
+    // Check the authorization headers used to generate the cache entry.
+    // We must validate the cache entry if:
+    //
+    // 1) the cache entry was generated prior to this session w/
+    //    credentials (see bug 103402).
+    // 2) the cache entry was generated w/o credentials, but would now
+    //    require credentials (see bug 96705).
+    //
+    // NOTE: this does not apply to proxy authentication.
+    //
+    entry->GetMetaDataElement("auth", getter_Copies(buf));
+    doValidation =
+        (fromPreviousSession && !buf.IsEmpty()) ||
+        (buf.IsEmpty() && mRequestHead.HasHeader(nsHttp::Authorization));
+    if (doValidation) {
+      prefetchStatus = Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::Auth;
+    }
+  }
+
+  // Bug #561276: We maintain a chain of cache-keys which returns cached
+  // 3xx-responses (redirects) in order to detect cycles. If a cycle is
+  // found, ignore the cached response and hit the net. Otherwise, use
+  // the cached response and add the cache-key to the chain. Note that
+  // a limited number of redirects (cached or not) is allowed and is
+  // enforced independently of this mechanism
+  if (!doValidation && isCachedRedirect) {
+    nsAutoCString cacheKey;
+    rv = GenerateCacheKey(mPostID, cacheKey);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+    auto redirectedCachekeys = mRedirectedCachekeys.Lock();
+    auto& ref = redirectedCachekeys.ref();
+    if (!ref) {
+      ref = MakeUnique<nsTArray<nsCString>>();
+    } else if (ref->Contains(cacheKey)) {
+      doValidation = true;
+    }
+
+    LOG(("Redirection-chain %s key %s\n",
+         doValidation ? "contains" : "does not contain", cacheKey.get()));
+
+    // Append cacheKey if not in the chain already
+    if (!doValidation) {
+      ref->AppendElement(cacheKey);
+    } else {
+      prefetchStatus =
+          Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::Redirect;
+    }
+  }
+
+  mCachedContentIsValid = !doValidation;
+
+  if (isForcedValid) {
+    // Telemetry value is only useful if this was a prefetched item
+    if (!doValidation) {
+      // Could have gotten to a funky state with some of the if chain above
+      // and in nsHttp::ValidationRequired. Make sure we get it right here.
+      prefetchStatus = Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::Used;
+
+      entry->MarkForcedValidUse();
+    }
+    Telemetry::AccumulateCategorical(prefetchStatus);
+  }
+
+  if (doValidation) {
+    //
+    // now, we are definitely going to issue a HTTP request to the server.
+    // make it conditional if possible.
+    //
+    // do not attempt to validate no-store content, since servers will not
+    // expect it to be cached.  (we only keep it in our cache for the
+    // purposes of back/forward, etc.)
+    //
+    // the request method MUST be either GET or HEAD (see bug 175641) and
+    // the cached response code must be < 400
+    //
+    // the cached content must not be weakly framed or marked immutable
+    //
+    // do not override conditional headers when consumer has defined its own
+    if (!mCachedResponseHead->NoStore() &&
+        (mRequestHead.IsGet() || mRequestHead.IsHead()) &&
+        !LoadCustomConditionalRequest() && !weaklyFramed && !isImmutable &&
+        (mCachedResponseHead->Status() < 400)) {
+      if (LoadConcurrentCacheAccess()) {
+        // In case of concurrent read and also validation request we
+        // must wait for the current writer to close the output stream
+        // first.  Otherwise, when the writer's job would have been interrupted
+        // before all the data were downloaded, we'd have to do a range request
+        // which would be a second request in line during this channel's
+        // life-time.  nsHttpChannel is not designed to do that, so rather
+        // turn off concurrent read and wait for entry's completion.
+        // Then only re-validation or range-re-validation request will go out.
+        StoreConcurrentCacheAccess(0);
+        // This will cause that OnCacheEntryCheck is called again with the same
+        // entry after the writer is done.
+        wantCompleteEntry = true;
+      } else {
+        nsAutoCString val;
+        // Add If-Modified-Since header if a Last-Modified was given
+        // and we are allowed to do this (see bugs 510359 and 269303)
+        if (canAddImsHeader) {
+          Unused << mCachedResponseHead->GetHeader(nsHttp::Last_Modified, val);
+          if (!val.IsEmpty()) {
+            rv = mRequestHead.SetHeader(nsHttp::If_Modified_Since, val);
+            MOZ_ASSERT(NS_SUCCEEDED(rv));
+          }
+        }
+        // Add If-None-Match header if an ETag was given in the response
+        Unused << mCachedResponseHead->GetHeader(nsHttp::ETag, val);
+        if (!val.IsEmpty()) {
+          rv = mRequestHead.SetHeader(nsHttp::If_None_Match, val);
+          MOZ_ASSERT(NS_SUCCEEDED(rv));
+        }
+        mDidReval = true;
+      }
+    }
+  }
+
+  if (mCachedContentIsValid || mDidReval) {
+    rv = OpenCacheInputStream(entry, mCachedContentIsValid);
+    if (NS_FAILED(rv)) {
+      // If we can't get the entity then we have to act as though we
+      // don't have the cache entry.
+      if (mDidReval) {
+        UntieValidationRequest();
+        mDidReval = false;
+      }
+      mCachedContentIsValid = false;
+    }
+  }
+
+  if (mDidReval) {
+    *aResult = ENTRY_NEEDS_REVALIDATION;
+  } else if (wantCompleteEntry) {
+    *aResult = RECHECK_AFTER_WRITE_FINISHED;
+  } else {
+    *aResult = ENTRY_WANTED;
+
+    if (doBackgroundValidation) {
+      PerformBackgroundCacheRevalidation();
+    }
+  }
+
+  if (mCachedContentIsValid) {
+    entry->MaybeMarkValid();
+  }
+
+  LOG(
+      ("nsHTTPChannel::OnCacheEntryCheck exit [this=%p doValidation=%d "
+       "result=%d]\n",
+       this, doValidation, *aResult));
+  return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnCacheEntryAvailable(nsICacheEntry* entry, bool aNew,
+                                     nsresult status) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsresult rv;
+
+  LOG(
+      ("nsHttpChannel::OnCacheEntryAvailable [this=%p entry=%p "
+       "new=%d status=%" PRIx32 "]\n",
+       this, entry, aNew, static_cast<uint32_t>(status)));
+
+  // if the channel's already fired onStopRequest, then we should ignore
+  // this event.
+  if (!LoadIsPending()) {
+    mCacheInputStream.CloseAndRelease();
+    return NS_OK;
+  }
+
+  rv = OnCacheEntryAvailableInternal(entry, aNew, status);
+  if (NS_FAILED(rv)) {
+    CloseCacheEntry(false);
+    if (mRaceCacheWithNetwork && mNetworkTriggered &&
+        mFirstResponseSource != RESPONSE_FROM_CACHE) {
+      // Ignore the error if we're racing cache with network and the cache
+      // didn't win, The network part will handle cancelation or any other
+      // error. Otherwise we could end up calling the listener twice, see
+      // bug 1397593.
+      LOG(
+          ("  not calling AsyncAbort() because we're racing cache with "
+           "network"));
+    } else {
+      Unused << AsyncAbort(rv);
+    }
+  }
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::OnCacheEntryAvailableInternal(nsICacheEntry* entry,
+                                                      bool aNew,
+                                                      nsresult status) {
+  nsresult rv;
+
+  if (mCanceled) {
+    LOG(("channel was canceled [this=%p status=%" PRIx32 "]\n", this,
+         static_cast<uint32_t>(static_cast<nsresult>(mStatus))));
+    return mStatus;
+  }
+
+  if (mIgnoreCacheEntry) {
+    if (!entry || aNew) {
+      // We use this flag later to decide whether to report
+      // LABELS_NETWORK_RACE_CACHE_VALIDATION::NotSent. We didn't have
+      // an usable entry, so drop the flag.
+      mIgnoreCacheEntry = false;
+    }
+    entry = nullptr;
+    status = NS_ERROR_NOT_AVAILABLE;
+  }
+
+  rv = OnNormalCacheEntryAvailable(entry, aNew, status);
+
+  if (NS_FAILED(rv) && (mLoadFlags & LOAD_ONLY_FROM_CACHE)) {
+    return NS_ERROR_DOCUMENT_NOT_CACHED;
+  }
+
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // We may be waiting for more callbacks...
+  if (AwaitingCacheCallbacks()) {
+    return NS_OK;
+  }
+
+  if (mRaceCacheWithNetwork && ((mCacheEntry && !mCachedContentIsValid &&
+                                 (mDidReval || LoadCachedContentIsPartial())) ||
+                                mIgnoreCacheEntry)) {
+    // We won't send the conditional request because the unconditional
+    // request was already sent (see bug 1377223).
+    AccumulateCategorical(
+        Telemetry::LABELS_NETWORK_RACE_CACHE_VALIDATION::NotSent);
+  }
+
+  if (mRaceCacheWithNetwork && mCachedContentIsValid) {
+    Unused << ReadFromCache(true);
+  }
+
+  return TriggerNetwork();
+}
+
+nsresult nsHttpChannel::OnNormalCacheEntryAvailable(nsICacheEntry* aEntry,
+                                                    bool aNew,
+                                                    nsresult aEntryStatus) {
+  StoreWaitForCacheEntry(LoadWaitForCacheEntry() & ~WAIT_FOR_CACHE_ENTRY);
+
+  if (NS_FAILED(aEntryStatus) || aNew) {
+    // Make sure this flag is dropped.  It may happen the entry is doomed
+    // between OnCacheEntryCheck and OnCacheEntryAvailable.
+    mCachedContentIsValid = false;
+
+    // From the same reason remove any conditional headers added
+    // in OnCacheEntryCheck.
+    if (mDidReval) {
+      LOG(("  Removing conditional request headers"));
+      UntieValidationRequest();
+      mDidReval = false;
+    }
+
+    if (LoadCachedContentIsPartial()) {
+      LOG(("  Removing byte range request headers"));
+      UntieByteRangeRequest();
+      StoreCachedContentIsPartial(false);
+    }
+
+    if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
+      // if this channel is only allowed to pull from the cache, then
+      // we must fail if we were unable to open a cache entry for read.
+      return NS_ERROR_DOCUMENT_NOT_CACHED;
+    }
+  }
+
+  if (NS_SUCCEEDED(aEntryStatus)) {
+    mCacheEntry = aEntry;
+    StoreCacheEntryIsWriteOnly(aNew);
+
+    if (!aNew && !mAsyncOpenTime.IsNull()) {
+      // We use microseconds for IO operations. For consistency let's use
+      // microseconds here too.
+      uint32_t duration = (TimeStamp::Now() - mAsyncOpenTime).ToMicroseconds();
+      bool isSlow = false;
+      if ((mCacheOpenWithPriority &&
+           mCacheQueueSizeWhenOpen >=
+               StaticPrefs::
+                   network_http_rcwn_cache_queue_priority_threshold()) ||
+          (!mCacheOpenWithPriority &&
+           mCacheQueueSizeWhenOpen >=
+               StaticPrefs::network_http_rcwn_cache_queue_normal_threshold())) {
+        isSlow = true;
+      }
+      CacheFileUtils::CachePerfStats::AddValue(
+          CacheFileUtils::CachePerfStats::ENTRY_OPEN, duration, isSlow);
+    }
+
+    if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+      Telemetry::Accumulate(Telemetry::HTTP_OFFLINE_CACHE_DOCUMENT_LOAD, false);
+    }
+  }
+
+  return NS_OK;
+}
+
+// Generates the proper cache-key for this instance of nsHttpChannel
+nsresult nsHttpChannel::GenerateCacheKey(uint32_t postID,
+                                         nsACString& cacheKey) {
+  AssembleCacheKey(mSpec.get(), postID, cacheKey);
+  return NS_OK;
+}
+
+// Assembles a cache-key from the given pieces of information and |mLoadFlags|
+void nsHttpChannel::AssembleCacheKey(const char* spec, uint32_t postID,
+                                     nsACString& cacheKey) {
+  cacheKey.Truncate();
+
+  if (mLoadFlags & LOAD_ANONYMOUS) {
+    cacheKey.AssignLiteral("anon&");
+  }
+
+  if (postID) {
+    char buf[32];
+    SprintfLiteral(buf, "id=%x&", postID);
+    cacheKey.Append(buf);
+  }
+
+  if (!cacheKey.IsEmpty()) {
+    cacheKey.AppendLiteral("uri=");
+  }
+
+  // Strip any trailing #ref from the URL before using it as the key
+  const char* p = strchr(spec, '#');
+  if (p) {
+    cacheKey.Append(spec, p - spec);
+  } else {
+    cacheKey.Append(spec);
+  }
+}
+
+nsresult DoUpdateExpirationTime(nsHttpChannel* aSelf,
+                                nsICacheEntry* aCacheEntry,
+                                nsHttpResponseHead* aResponseHead,
+                                uint32_t& aExpirationTime) {
+  MOZ_ASSERT(aExpirationTime == 0);
+  NS_ENSURE_TRUE(aResponseHead, NS_ERROR_FAILURE);
+
+  nsresult rv;
+
+  if (!aResponseHead->MustValidate()) {
+    // For stale-while-revalidate we use expiration time as the absolute base
+    // for calculation of the stale window absolute end time.  Hence, when the
+    // entry may be served w/o revalidation, we need a non-zero value for the
+    // expiration time.  Let's set it to |now|, which basicly means "expired",
+    // same as when set to 0.
+    uint32_t now = NowInSeconds();
+    aExpirationTime = now;
+
+    uint32_t freshnessLifetime = 0;
+
+    rv = aResponseHead->ComputeFreshnessLifetime(&freshnessLifetime);
+    if (NS_FAILED(rv)) return rv;
+
+    if (freshnessLifetime > 0) {
+      uint32_t currentAge = 0;
+
+      rv = aResponseHead->ComputeCurrentAge(now, aSelf->GetRequestTime(),
+                                            &currentAge);
+      if (NS_FAILED(rv)) return rv;
+
+      LOG(("freshnessLifetime = %u, currentAge = %u\n", freshnessLifetime,
+           currentAge));
+
+      if (freshnessLifetime > currentAge) {
+        uint32_t timeRemaining = freshnessLifetime - currentAge;
+        // be careful... now + timeRemaining may overflow
+        if (now + timeRemaining < now) {
+          aExpirationTime = uint32_t(-1);
+        } else {
+          aExpirationTime = now + timeRemaining;
+        }
+      }
+    }
+  }
+
+  rv = aCacheEntry->SetExpirationTime(aExpirationTime);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return rv;
+}
+
+// UpdateExpirationTime is called when a new response comes in from the server.
+// It updates the stored response-time and sets the expiration time on the
+// cache entry.
+//
+// From section 13.2.4 of RFC2616, we compute expiration time as follows:
+//
+//    timeRemaining = freshnessLifetime - currentAge
+//    expirationTime = now + timeRemaining
+//
+nsresult nsHttpChannel::UpdateExpirationTime() {
+  uint32_t expirationTime = 0;
+  nsresult rv = DoUpdateExpirationTime(this, mCacheEntry, mResponseHead.get(),
+                                       expirationTime);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::OpenCacheInputStream(nsICacheEntry* cacheEntry,
+                                             bool startBuffering) {
+  nsresult rv;
+
+  if (mURI->SchemeIs("https")) {
+    rv = cacheEntry->GetSecurityInfo(getter_AddRefs(mCachedSecurityInfo));
+    if (NS_FAILED(rv)) {
+      LOG(("failed to parse security-info [channel=%p, entry=%p]", this,
+           cacheEntry));
+      NS_WARNING("failed to parse security-info");
+      cacheEntry->AsyncDoom(nullptr);
+      return rv;
+    }
+
+    MOZ_ASSERT(mCachedSecurityInfo);
+    if (!mCachedSecurityInfo) {
+      LOG(
+          ("mCacheEntry->GetSecurityInfo returned success but did not "
+           "return the security info [channel=%p, entry=%p]",
+           this, cacheEntry));
+      cacheEntry->AsyncDoom(nullptr);
+      return NS_ERROR_UNEXPECTED;  // XXX error code
+    }
+  }
+
+  // Keep the conditions below in sync with the conditions in ReadFromCache.
+
+  rv = NS_OK;
+
+  if (WillRedirect(*mCachedResponseHead)) {
+    // Do not even try to read the entity for a redirect because we do not
+    // return an entity to the application when we process redirects.
+    LOG(("Will skip read of cached redirect entity\n"));
+    return NS_OK;
+  }
+
+  if ((mLoadFlags & nsICachingChannel::LOAD_ONLY_IF_MODIFIED) &&
+      !LoadCachedContentIsPartial()) {
+    // For LOAD_ONLY_IF_MODIFIED, we usually don't have to deal with the
+    // cached entity.
+    LOG(
+        ("Will skip read from cache based on LOAD_ONLY_IF_MODIFIED "
+         "load flag\n"));
+    return NS_OK;
+  }
+
+  // Open an input stream for the entity, so that the call to OpenInputStream
+  // happens off the main thread.
+  nsCOMPtr<nsIInputStream> stream;
+
+  // If an alternate representation was requested, try to open the alt
+  // input stream.
+  // If the entry has a "is-from-child" metadata, then only open the altdata
+  // stream if the consumer is also from child.
+  bool altDataFromChild = false;
+  {
+    nsCString value;
+    rv = cacheEntry->GetMetaDataElement("alt-data-from-child",
+                                        getter_Copies(value));
+    altDataFromChild = !value.IsEmpty();
+  }
+
+  nsAutoCString altDataType;
+  Unused << cacheEntry->GetAltDataType(altDataType);
+
+  nsAutoCString contentType;
+  mCachedResponseHead->ContentType(contentType);
+
+  bool foundAltData = false;
+  bool deliverAltData = true;
+  if (!LoadDisableAltDataCache() && !altDataType.IsEmpty() &&
+      !mPreferredCachedAltDataTypes.IsEmpty() &&
+      altDataFromChild == LoadAltDataForChild()) {
+    for (auto& pref : mPreferredCachedAltDataTypes) {
+      if (pref.type() == altDataType &&
+          (pref.contentType().IsEmpty() || pref.contentType() == contentType)) {
+        foundAltData = true;
+        deliverAltData =
+            pref.deliverAltData() ==
+            nsICacheInfoChannel::PreferredAlternativeDataDeliveryType::ASYNC;
+        break;
+      }
+    }
+  }
+
+  nsCOMPtr<nsIInputStream> altData;
+  int64_t altDataSize = -1;
+  if (foundAltData) {
+    rv = cacheEntry->OpenAlternativeInputStream(altDataType,
+                                                getter_AddRefs(altData));
+    if (NS_SUCCEEDED(rv)) {
+      // We have succeeded.
+      mAvailableCachedAltDataType = altDataType;
+      StoreDeliveringAltData(deliverAltData);
+
+      // Set the correct data size on the channel.
+      Unused << cacheEntry->GetAltDataSize(&altDataSize);
+      mAltDataLength = altDataSize;
+
+      LOG(("Opened alt-data input stream [type=%s, size=%" PRId64
+           ", deliverAltData=%d]",
+           altDataType.get(), mAltDataLength, deliverAltData));
+
+      if (deliverAltData) {
+        stream = altData;
+      }
+    }
+  }
+
+  if (!stream) {
+    rv = cacheEntry->OpenInputStream(0, getter_AddRefs(stream));
+  }
+
+  if (NS_FAILED(rv)) {
+    LOG(
+        ("Failed to open cache input stream [channel=%p, "
+         "mCacheEntry=%p]",
+         this, cacheEntry));
+    return rv;
+  }
+
+  if (startBuffering) {
+    bool nonBlocking;
+    rv = stream->IsNonBlocking(&nonBlocking);
+    if (NS_SUCCEEDED(rv) && nonBlocking) startBuffering = false;
+  }
+
+  if (!startBuffering) {
+    // Bypass wrapping the input stream for the new cache back-end since
+    // nsIStreamTransportService expects a blocking stream.  Preloading of
+    // the data must be done on the level of the cache backend, internally.
+    //
+    // We do not connect the stream to the stream transport service if we
+    // have to validate the entry with the server. If we did, we would get
+    // into a race condition between the stream transport service reading
+    // the existing contents and the opening of the cache entry's output
+    // stream to write the new contents in the case where we get a non-304
+    // response.
+    LOG(
+        ("Opened cache input stream without buffering [channel=%p, "
+         "mCacheEntry=%p, stream=%p]",
+         this, cacheEntry, stream.get()));
+    mCacheInputStream.takeOver(stream);
+    return rv;
+  }
+
+  // Have the stream transport service start reading the entity on one of its
+  // background threads.
+
+  nsCOMPtr<nsITransport> transport;
+  nsCOMPtr<nsIInputStream> wrapper;
+
+  nsCOMPtr<nsIStreamTransportService> sts(
+      components::StreamTransport::Service());
+  rv = sts ? NS_OK : NS_ERROR_NOT_AVAILABLE;
+  if (NS_SUCCEEDED(rv)) {
+    rv = sts->CreateInputTransport(stream, true, getter_AddRefs(transport));
+  }
+  if (NS_SUCCEEDED(rv)) {
+    rv = transport->OpenInputStream(0, 0, 0, getter_AddRefs(wrapper));
+  }
+  if (NS_SUCCEEDED(rv)) {
+    LOG(
+        ("Opened cache input stream [channel=%p, wrapper=%p, "
+         "transport=%p, stream=%p]",
+         this, wrapper.get(), transport.get(), stream.get()));
+  } else {
+    LOG(
+        ("Failed to open cache input stream [channel=%p, "
+         "wrapper=%p, transport=%p, stream=%p]",
+         this, wrapper.get(), transport.get(), stream.get()));
+
+    stream->Close();
+    return rv;
+  }
+
+  mCacheInputStream.takeOver(wrapper);
+
+  return NS_OK;
+}
+
+// Actually process the cached response that we started to handle in CheckCache
+// and/or StartBufferingCachedEntity.
+nsresult nsHttpChannel::ReadFromCache(bool alreadyMarkedValid) {
+  NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_FAILURE);
+  NS_ENSURE_TRUE(mCachedContentIsValid, NS_ERROR_FAILURE);
+  NS_ENSURE_TRUE(!mCachePump, NS_OK);  // already opened
+
+  LOG(
+      ("nsHttpChannel::ReadFromCache [this=%p] "
+       "Using cached copy of: %s\n",
+       this, mSpec.get()));
+
+  // When racing the cache with the network with a timer, and we get data from
+  // the cache, we should prevent the timer from triggering a network request.
+  if (mNetworkTriggerTimer) {
+    mNetworkTriggerTimer->Cancel();
+    mNetworkTriggerTimer = nullptr;
+  }
+
+  if (mRaceCacheWithNetwork) {
+    MOZ_ASSERT(mFirstResponseSource != RESPONSE_FROM_CACHE);
+    if (mFirstResponseSource == RESPONSE_PENDING) {
+      LOG(("First response from cache\n"));
+      mFirstResponseSource = RESPONSE_FROM_CACHE;
+
+      // Cancel the transaction because we will serve the request from the cache
+      CancelNetworkRequest(NS_BINDING_ABORTED);
+      if (mTransactionPump && mSuspendCount) {
+        uint32_t suspendCount = mSuspendCount;
+        while (suspendCount--) {
+          mTransactionPump->Resume();
+        }
+      }
+      mTransaction = nullptr;
+      mTransactionPump = nullptr;
+    } else {
+      MOZ_ASSERT(mFirstResponseSource == RESPONSE_FROM_NETWORK);
+      LOG(
+          ("Skipping read from cache because first response was from "
+           "network\n"));
+
+      if (!mOnCacheEntryCheckTimestamp.IsNull()) {
+        TimeStamp currentTime = TimeStamp::Now();
+        int64_t savedTime =
+            (currentTime - mOnStartRequestTimestamp).ToMilliseconds();
+        Telemetry::Accumulate(
+            Telemetry::NETWORK_RACE_CACHE_WITH_NETWORK_SAVED_TIME, savedTime);
+
+        int64_t diffTime =
+            (currentTime - mOnCacheEntryCheckTimestamp).ToMilliseconds();
+        Telemetry::Accumulate(
+            Telemetry::NETWORK_RACE_CACHE_WITH_NETWORK_OCEC_ON_START_DIFF,
+            diffTime);
+      }
+      return NS_OK;
+    }
+  }
+
+  if (mCachedResponseHead) mResponseHead = std::move(mCachedResponseHead);
+
+  UpdateInhibitPersistentCachingFlag();
+
+  // if we don't already have security info, try to get it from the cache
+  // entry. there are two cases to consider here: 1) we are just reading
+  // from the cache, or 2) this may be due to a 304 not modified response,
+  // in which case we could have security info from a socket transport.
+  if (!mSecurityInfo) mSecurityInfo = mCachedSecurityInfo;
+
+  if (!alreadyMarkedValid && !LoadCachedContentIsPartial()) {
+    // We validated the entry, and we have write access to the cache, so
+    // mark the cache entry as valid in order to allow others access to
+    // this cache entry.
+    //
+    // TODO: This should be done asynchronously so we don't take the cache
+    // service lock on the main thread.
+    mCacheEntry->MaybeMarkValid();
+  }
+
+  nsresult rv;
+
+  // Keep the conditions below in sync with the conditions in
+  // StartBufferingCachedEntity.
+
+  if (WillRedirect(*mResponseHead)) {
+    // TODO: Bug 759040 - We should call HandleAsyncRedirect directly here,
+    // to avoid event dispatching latency.
+    MOZ_ASSERT(!mCacheInputStream);
+    LOG(("Skipping skip read of cached redirect entity\n"));
+    return AsyncCall(&nsHttpChannel::HandleAsyncRedirect);
+  }
+
+  if ((mLoadFlags & LOAD_ONLY_IF_MODIFIED) && !LoadCachedContentIsPartial()) {
+    LOG(
+        ("Skipping read from cache based on LOAD_ONLY_IF_MODIFIED "
+         "load flag\n"));
+    MOZ_ASSERT(!mCacheInputStream);
+    // TODO: Bug 759040 - We should call HandleAsyncNotModified directly
+    // here, to avoid event dispatching latency.
+    return AsyncCall(&nsHttpChannel::HandleAsyncNotModified);
+  }
+
+  MOZ_ASSERT(mCacheInputStream);
+  if (!mCacheInputStream) {
+    NS_ERROR(
+        "mCacheInputStream is null but we're expecting to "
+        "be able to read from it.");
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsCOMPtr<nsIInputStream> inputStream = mCacheInputStream.forget();
+
+  rv = nsInputStreamPump::Create(getter_AddRefs(mCachePump), inputStream, 0, 0,
+                                 true);
+  if (NS_FAILED(rv)) {
+    inputStream->Close();
+    return rv;
+  }
+
+  rv = mCachePump->AsyncRead(this);
+  if (NS_FAILED(rv)) return rv;
+
+  if (LoadTimingEnabled()) mCacheReadStart = TimeStamp::Now();
+
+  uint32_t suspendCount = mSuspendCount;
+  if (LoadAsyncResumePending()) {
+    LOG(
+        ("  Suspend()'ing cache pump once because of async resume pending"
+         ", sc=%u, pump=%p, this=%p",
+         suspendCount, mCachePump.get(), this));
+    ++suspendCount;
+  }
+  while (suspendCount--) {
+    mCachePump->Suspend();
+  }
+
+  return NS_OK;
+}
+
+void nsHttpChannel::CloseCacheEntry(bool doomOnFailure) {
+  mCacheInputStream.CloseAndRelease();
+
+  if (!mCacheEntry) return;
+
+  LOG(("nsHttpChannel::CloseCacheEntry [this=%p] mStatus=%" PRIx32
+       " CacheEntryIsWriteOnly=%x",
+       this, static_cast<uint32_t>(static_cast<nsresult>(mStatus)),
+       LoadCacheEntryIsWriteOnly()));
+
+  // If we have begun to create or replace a cache entry, and that cache
+  // entry is not complete and not resumable, then it needs to be doomed.
+  // Otherwise, CheckCache will make the mistake of thinking that the
+  // partial cache entry is complete.
+
+  bool doom = false;
+  if (LoadInitedCacheEntry()) {
+    MOZ_ASSERT(mResponseHead, "oops");
+    if (NS_FAILED(mStatus) && doomOnFailure && LoadCacheEntryIsWriteOnly() &&
+        !mResponseHead->IsResumable()) {
+      doom = true;
+    }
+  } else if (LoadCacheEntryIsWriteOnly()) {
+    doom = true;
+  }
+
+  if (doom) {
+    LOG(("  dooming cache entry!!"));
+    mCacheEntry->AsyncDoom(nullptr);
+  } else {
+    // Store updated security info, makes cached EV status race less likely
+    // (see bug 1040086)
+    if (mSecurityInfo) {
+      mCacheEntry->SetSecurityInfo(mSecurityInfo);
+    }
+  }
+
+  mCachedResponseHead = nullptr;
+
+  mCachePump = nullptr;
+  // This releases the entry for other consumers to use.
+  // We call Dismiss() in case someone still keeps a reference
+  // to this entry handle.
+  mCacheEntry->Dismiss();
+  mCacheEntry = nullptr;
+  StoreCacheEntryIsWriteOnly(false);
+  StoreInitedCacheEntry(false);
+}
+
+void nsHttpChannel::MaybeCreateCacheEntryWhenRCWN() {
+  mozilla::MutexAutoLock lock(mRCWNLock);
+
+  // Create cache entry for writing only when we're racing cache with network
+  // and we don't have the entry because network won.
+  if (mCacheEntry || !mRaceCacheWithNetwork ||
+      mFirstResponseSource != RESPONSE_FROM_NETWORK ||
+      LoadCacheEntryIsReadOnly()) {
+    return;
+  }
+
+  LOG(("nsHttpChannel::MaybeCreateCacheEntryWhenRCWN [this=%p]", this));
+
+  nsCOMPtr<nsICacheStorageService> cacheStorageService(
+      components::CacheStorage::Service());
+  if (!cacheStorageService) {
+    return;
+  }
+
+  nsCOMPtr<nsICacheStorage> cacheStorage;
+  RefPtr<LoadContextInfo> info = GetLoadContextInfo(this);
+  Unused << cacheStorageService->DiskCacheStorage(info,
+                                                  getter_AddRefs(cacheStorage));
+  if (!cacheStorage) {
+    return;
+  }
+
+  Unused << cacheStorage->OpenTruncate(mCacheEntryURI, mCacheIdExtension,
+                                       getter_AddRefs(mCacheEntry));
+
+  LOG(("  created entry %p", mCacheEntry.get()));
+
+  if (AwaitingCacheCallbacks()) {
+    // Setting mIgnoreCacheEntry to true ensures that we won't close this
+    // write-only entry in OnCacheEntryAvailable() if this method was called
+    // after OnCacheEntryCheck().
+    mIgnoreCacheEntry = true;
+  }
+
+  mAvailableCachedAltDataType.Truncate();
+  StoreDeliveringAltData(false);
+  mAltDataLength = -1;
+  mCacheInputStream.CloseAndRelease();
+  mCachedContentIsValid = false;
+}
+
+// Initialize the cache entry for writing.
+//  - finalize storage policy
+//  - store security info
+//  - update expiration time
+//  - store headers and other meta data
+nsresult nsHttpChannel::InitCacheEntry() {
+  nsresult rv;
+
+  NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_UNEXPECTED);
+  // if only reading, nothing to be done here.
+  if (LoadCacheEntryIsReadOnly()) return NS_OK;
+
+  // Don't cache the response again if already cached...
+  if (mCachedContentIsValid) return NS_OK;
+
+  LOG(("nsHttpChannel::InitCacheEntry [this=%p entry=%p]\n", this,
+       mCacheEntry.get()));
+
+  bool recreate = !LoadCacheEntryIsWriteOnly();
+  bool dontPersist = mLoadFlags & INHIBIT_PERSISTENT_CACHING;
+
+  if (!recreate && dontPersist) {
+    // If the current entry is persistent but we inhibit peristence
+    // then force recreation of the entry as memory/only.
+    rv = mCacheEntry->GetPersistent(&recreate);
+    if (NS_FAILED(rv)) return rv;
+  }
+
+  if (recreate) {
+    LOG(
+        ("  we have a ready entry, but reading it again from the server -> "
+         "recreating cache entry\n"));
+    // clean the altData cache and reset this to avoid wrong content length
+    mAvailableCachedAltDataType.Truncate();
+    StoreDeliveringAltData(false);
+
+    nsCOMPtr<nsICacheEntry> currentEntry;
+    currentEntry.swap(mCacheEntry);
+    rv = currentEntry->Recreate(dontPersist, getter_AddRefs(mCacheEntry));
+    if (NS_FAILED(rv)) {
+      LOG(("  recreation failed, the response will not be cached"));
+      return NS_OK;
+    }
+
+    StoreCacheEntryIsWriteOnly(true);
+  }
+
+  // Set the expiration time for this cache entry
+  rv = UpdateExpirationTime();
+  if (NS_FAILED(rv)) return rv;
+
+  // mark this weakly framed until a response body is seen
+  mCacheEntry->SetMetaDataElement("strongly-framed", "0");
+
+  rv = AddCacheEntryHeaders(mCacheEntry);
+  if (NS_FAILED(rv)) return rv;
+
+  StoreInitedCacheEntry(true);
+
+  // Don't perform the check when writing (doesn't make sense)
+  StoreConcurrentCacheAccess(0);
+
+  return NS_OK;
+}
+
+void nsHttpChannel::UpdateInhibitPersistentCachingFlag() {
+  // The no-store directive within the 'Cache-Control:' header indicates
+  // that we must not store the response in a persistent cache.
+  if (mResponseHead->NoStore()) mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
+
+  // Only cache SSL content on disk if the pref is set
+  if (!gHttpHandler->IsPersistentHttpsCachingEnabled() &&
+      mURI->SchemeIs("https")) {
+    mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
+  }
+}
+
+nsresult DoAddCacheEntryHeaders(nsHttpChannel* self, nsICacheEntry* entry,
+                                nsHttpRequestHead* requestHead,
+                                nsHttpResponseHead* responseHead,
+                                nsITransportSecurityInfo* securityInfo) {
+  nsresult rv;
+
+  LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%p] begin", self));
+  // Store secure data in memory only
+  if (securityInfo) {
+    entry->SetSecurityInfo(securityInfo);
+  }
+
+  // Store the HTTP request method with the cache entry so we can distinguish
+  // for example GET and HEAD responses.
+  nsAutoCString method;
+  requestHead->Method(method);
+  rv = entry->SetMetaDataElement("request-method", method.get());
+  if (NS_FAILED(rv)) return rv;
+
+  // Store the HTTP authorization scheme used if any...
+  rv = StoreAuthorizationMetaData(entry, requestHead);
+  if (NS_FAILED(rv)) return rv;
+
+  // Iterate over the headers listed in the Vary response header, and
+  // store the value of the corresponding request header so we can verify
+  // that it has not varied when we try to re-use the cached response at
+  // a later time.  Take care to store "Cookie" headers only as hashes
+  // due to security considerations and the fact that they can be pretty
+  // large (bug 468426). We take care of "Vary: cookie" in ResponseWouldVary.
+  //
+  // NOTE: if "Vary: accept, cookie", then we will store the "accept" header
+  // in the cache.  we could try to avoid needlessly storing the "accept"
+  // header in this case, but it doesn't seem worth the extra code to perform
+  // the check.
+  {
+    nsAutoCString buf, metaKey;
+    Unused << responseHead->GetHeader(nsHttp::Vary, buf);
+
+    constexpr auto prefix = "request-"_ns;
+
+    for (const nsACString& token :
+         nsCCharSeparatedTokenizer(buf, NS_HTTP_HEADER_SEP).ToRange()) {
+      LOG(
+          ("nsHttpChannel::AddCacheEntryHeaders [this=%p] "
+           "processing %s",
+           self, nsPromiseFlatCString(token).get()));
+      if (!token.EqualsLiteral("*")) {
+        nsHttpAtom atom = nsHttp::ResolveAtom(token);
+        nsAutoCString val;
+        nsAutoCString hash;
+        if (NS_SUCCEEDED(requestHead->GetHeader(atom, val))) {
+          // If cookie-header, store a hash of the value
+          if (atom == nsHttp::Cookie) {
+            LOG(
+                ("nsHttpChannel::AddCacheEntryHeaders [this=%p] "
+                 "cookie-value %s",
+                 self, val.get()));
+            rv = Hash(val.get(), hash);
+            // If hash failed, store a string not very likely
+            // to be the result of subsequent hashes
+            if (NS_FAILED(rv)) {
+              val = "<hash failed>"_ns;
+            } else {
+              val = hash;
+            }
+
+            LOG(("   hashed to %s\n", val.get()));
+          }
+
+          // build cache meta data key and set meta data element...
+          metaKey = prefix + token;
+          entry->SetMetaDataElement(metaKey.get(), val.get());
+        } else {
+          LOG(
+              ("nsHttpChannel::AddCacheEntryHeaders [this=%p] "
+               "clearing metadata for %s",
+               self, nsPromiseFlatCString(token).get()));
+          metaKey = prefix + token;
+          entry->SetMetaDataElement(metaKey.get(), nullptr);
+        }
+      }
+    }
+  }
+
+  // Store the received HTTP head with the cache entry as an element of
+  // the meta data.
+  nsAutoCString head;
+  responseHead->Flatten(head, true);
+  rv = entry->SetMetaDataElement("response-head", head.get());
+  if (NS_FAILED(rv)) return rv;
+  head.Truncate();
+  responseHead->FlattenNetworkOriginalHeaders(head);
+  rv = entry->SetMetaDataElement("original-response-headers", head.get());
+  if (NS_FAILED(rv)) return rv;
+
+  // Indicate we have successfully finished setting metadata on the cache entry.
+  rv = entry->MetaDataReady();
+
+  return rv;
+}
+
+nsresult nsHttpChannel::AddCacheEntryHeaders(nsICacheEntry* entry) {
+  return DoAddCacheEntryHeaders(this, entry, &mRequestHead, mResponseHead.get(),
+                                mSecurityInfo);
+}
+
+inline void GetAuthType(const char* challenge, nsCString& authType) {
+  const char* p;
+
+  // get the challenge type
+  if ((p = strchr(challenge, ' ')) != nullptr) {
+    authType.Assign(challenge, p - challenge);
+  } else {
+    authType.Assign(challenge);
+  }
+}
+
+nsresult StoreAuthorizationMetaData(nsICacheEntry* entry,
+                                    nsHttpRequestHead* requestHead) {
+  // Not applicable to proxy authorization...
+  nsAutoCString val;
+  if (NS_FAILED(requestHead->GetHeader(nsHttp::Authorization, val))) {
+    return NS_OK;
+  }
+
+  // eg. [Basic realm="wally world"]
+  nsAutoCString buf;
+  GetAuthType(val.get(), buf);
+  return entry->SetMetaDataElement("auth", buf.get());
+}
+
+// Finalize the cache entry
+//  - may need to rewrite response headers if any headers changed
+//  - may need to recalculate the expiration time if any headers changed
+//  - called only for freshly written cache entries
+nsresult nsHttpChannel::FinalizeCacheEntry() {
+  LOG(("nsHttpChannel::FinalizeCacheEntry [this=%p]\n", this));
+
+  // Don't update this meta-data on 304
+  if (LoadStronglyFramed() && !mCachedContentIsValid && mCacheEntry) {
+    LOG(("nsHttpChannel::FinalizeCacheEntry [this=%p] Is Strongly Framed\n",
+         this));
+    mCacheEntry->SetMetaDataElement("strongly-framed", "1");
+  }
+
+  if (mResponseHead && LoadResponseHeadersModified()) {
+    // Set the expiration time for this cache entry
+    nsresult rv = UpdateExpirationTime();
+    if (NS_FAILED(rv)) return rv;
+  }
+  return NS_OK;
+}
+
+// Open an output stream to the cache entry and insert a listener tee into
+// the chain of response listeners.
+nsresult nsHttpChannel::InstallCacheListener(int64_t offset) {
+  nsresult rv;
+
+  LOG(("Preparing to write data into the cache [uri=%s]\n", mSpec.get()));
+
+  MOZ_ASSERT(mCacheEntry);
+  MOZ_ASSERT(LoadCacheEntryIsWriteOnly() || LoadCachedContentIsPartial() ||
+             mRaceCacheWithNetwork);
+  MOZ_ASSERT(mListener);
+
+  nsAutoCString contentEncoding, contentType;
+  Unused << mResponseHead->GetHeader(nsHttp::Content_Encoding, contentEncoding);
+  mResponseHead->ContentType(contentType);
+  // If the content is compressible and the server has not compressed it,
+  // mark the cache entry for compression.
+  if (contentEncoding.IsEmpty() &&
+      (contentType.EqualsLiteral(TEXT_HTML) ||
+       contentType.EqualsLiteral(TEXT_PLAIN) ||
+       contentType.EqualsLiteral(TEXT_CSS) ||
+       contentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
+       contentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
+       contentType.EqualsLiteral(TEXT_XML) ||
+       contentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
+       contentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
+       contentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
+       contentType.EqualsLiteral(APPLICATION_XHTML_XML))) {
+    rv = mCacheEntry->SetMetaDataElement("uncompressed-len", "0");
+    if (NS_FAILED(rv)) {
+      LOG(("unable to mark cache entry for compression"));
+    }
+  }
+
+  LOG(("Trading cache input stream for output stream [channel=%p]", this));
+
+  // We must close the input stream first because cache entries do not
+  // correctly handle having an output stream and input streams open at
+  // the same time.
+  mCacheInputStream.CloseAndRelease();
+
+  int64_t predictedSize = mResponseHead->TotalEntitySize();
+  if (predictedSize != -1) {
+    predictedSize -= offset;
+  }
+
+  nsCOMPtr<nsIOutputStream> out;
+  rv =
+      mCacheEntry->OpenOutputStream(offset, predictedSize, getter_AddRefs(out));
+  if (rv == NS_ERROR_NOT_AVAILABLE) {
+    LOG(("  entry doomed, not writing it [channel=%p]", this));
+    // Entry is already doomed.
+    // This may happen when expiration time is set to past and the entry
+    // has been removed by the background eviction logic.
+    return NS_OK;
+  }
+  if (rv == NS_ERROR_FILE_TOO_BIG) {
+    LOG(("  entry would exceed max allowed size, not writing it [channel=%p]",
+         this));
+    mCacheEntry->AsyncDoom(nullptr);
+    return NS_OK;
+  }
+  if (NS_FAILED(rv)) return rv;
+
+  if (LoadCacheOnlyMetadata()) {
+    LOG(("Not storing content, cacheOnlyMetadata set"));
+    // We must open and then close the output stream of the cache entry.
+    // This way we indicate the content has been written (despite with zero
+    // length) and the entry is now in the ready state with "having data".
+
+    out->Close();
+    return NS_OK;
+  }
+
+  // XXX disk cache does not support overlapped i/o yet
+#if 0
+    // Mark entry valid inorder to allow simultaneous reading...
+    rv = mCacheEntry->MarkValid();
+    if (NS_FAILED(rv)) return rv;
+#endif
+
+  nsCOMPtr<nsIStreamListenerTee> tee =
+      do_CreateInstance(kStreamListenerTeeCID, &rv);
+  if (NS_FAILED(rv)) return rv;
+
+  LOG(("nsHttpChannel::InstallCacheListener sync tee %p rv=%" PRIx32, tee.get(),
+       static_cast<uint32_t>(rv)));
+  rv = tee->Init(mListener, out, nullptr);
+  if (NS_FAILED(rv)) return rv;
+
+  mListener = tee;
+  return NS_OK;
+}
+
+void nsHttpChannel::ClearBogusContentEncodingIfNeeded() {
+  if (!StaticPrefs::network_http_clear_bogus_content_encoding()) {
+    return;
+  }
+
+  // For .gz files, apache sends both a Content-Type: application/x-gzip
+  // as well as Content-Encoding: gzip, which is completely wrong.  In
+  // this case, we choose to ignore the rogue Content-Encoding header. We
+  // must do this early on so as to prevent it from being seen up stream.
+  // The same problem exists for Content-Encoding: compress in default
+  // Apache installs.
+  nsAutoCString contentType;
+  mResponseHead->ContentType(contentType);
+  if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding, "gzip") &&
+      (contentType.EqualsLiteral(APPLICATION_GZIP) ||
+       contentType.EqualsLiteral(APPLICATION_GZIP2) ||
+       contentType.EqualsLiteral(APPLICATION_GZIP3))) {
+    // clear the Content-Encoding header
+    mResponseHead->ClearHeader(nsHttp::Content_Encoding);
+  } else if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding,
+                                           "compress") &&
+             (contentType.EqualsLiteral(APPLICATION_COMPRESS) ||
+              contentType.EqualsLiteral(APPLICATION_COMPRESS2))) {
+    // clear the Content-Encoding header
+    mResponseHead->ClearHeader(nsHttp::Content_Encoding);
+  }
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <redirect>
+//-----------------------------------------------------------------------------
+
+nsresult nsHttpChannel::SetupReplacementChannel(nsIURI* newURI,
+                                                nsIChannel* newChannel,
+                                                bool preserveMethod,
+                                                uint32_t redirectFlags) {
+  LOG(
+      ("nsHttpChannel::SetupReplacementChannel "
+       "[this=%p newChannel=%p preserveMethod=%d]",
+       this, newChannel, preserveMethod));
+
+  if (!mEndMarkerAdded && profiler_thread_is_being_profiled_for_markers()) {
+    mEndMarkerAdded = true;
+
+    nsAutoCString requestMethod;
+    GetRequestMethod(requestMethod);
+
+    int32_t priority = PRIORITY_NORMAL;
+    GetPriority(&priority);
+
+    TimingStruct timings;
+    if (mTransaction) {
+      timings = mTransaction->Timings();
+    }
+
+    uint64_t size = 0;
+    GetEncodedBodySize(&size);
+
+    nsAutoCString contentType;
+    if (mResponseHead) {
+      mResponseHead->ContentType(contentType);
+    }
+
+    RefPtr<nsIIdentChannel> newIdentChannel = do_QueryObject(newChannel);
+    uint64_t channelId = 0;
+    if (newIdentChannel) {
+      channelId = newIdentChannel->ChannelId();
+    }
+    profiler_add_network_marker(
+        mURI, requestMethod, priority, mChannelId,
+        NetworkLoadType::LOAD_REDIRECT, mLastStatusReported, TimeStamp::Now(),
+        size, mCacheDisposition, mLoadInfo->GetInnerWindowID(),
+        mLoadInfo->GetOriginAttributes().mPrivateBrowsingId > 0, &timings,
+        std::move(mSource), Some(nsDependentCString(contentType.get())), newURI,
+        redirectFlags, channelId);
+  }
+
+  nsresult rv = HttpBaseChannel::SetupReplacementChannel(
+      newURI, newChannel, preserveMethod, redirectFlags);
+  if (NS_FAILED(rv)) return rv;
+
+  rv = CheckRedirectLimit(redirectFlags);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // clear exempt flag such that a subdomain redirection gets
+  // upgraded even if the initial request was exempted by https-first/ -only
+  nsCOMPtr<nsILoadInfo> newLoadInfo = newChannel->LoadInfo();
+  nsHTTPSOnlyUtils::PotentiallyClearExemptFlag(newLoadInfo);
+
+  // pass on the early hint observer to be able to process `103 Early Hints`
+  // responses after cross origin redirects
+  if (mEarlyHintObserver) {
+    if (RefPtr<nsHttpChannel> httpChannelImpl = do_QueryObject(newChannel)) {
+      httpChannelImpl->SetEarlyHintObserver(mEarlyHintObserver);
+    }
+    mEarlyHintObserver = nullptr;
+  }
+
+  // We don't support redirection for WebTransport for now.
+  mWebTransportSessionEventListener = nullptr;
+
+  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(newChannel);
+  if (!httpChannel) return NS_OK;  // no other options to set
+
+  // convey the ApplyConversion flag (bug 91862)
+  nsCOMPtr<nsIEncodedChannel> encodedChannel = do_QueryInterface(httpChannel);
+  if (encodedChannel) encodedChannel->SetApplyConversion(LoadApplyConversion());
+
+  // transfer the resume information
+  if (LoadResuming()) {
+    nsCOMPtr<nsIResumableChannel> resumableChannel(
+        do_QueryInterface(newChannel));
+    if (!resumableChannel) {
+      NS_WARNING(
+          "Got asked to resume, but redirected to non-resumable channel!");
+      return NS_ERROR_NOT_RESUMABLE;
+    }
+    resumableChannel->ResumeAt(mStartPos, mEntityID);
+  }
+
+  nsCOMPtr<nsIHttpChannelInternal> internalChannel =
+      do_QueryInterface(newChannel, &rv);
+  if (NS_SUCCEEDED(rv)) {
+    TimeStamp timestamp;
+    rv = GetNavigationStartTimeStamp(&timestamp);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+    if (timestamp) {
+      Unused << internalChannel->SetNavigationStartTimeStamp(timestamp);
+    }
+  }
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::AsyncProcessRedirection(uint32_t redirectType) {
+  LOG(("nsHttpChannel::AsyncProcessRedirection [this=%p type=%u]\n", this,
+       redirectType));
+
+  nsresult rv = ProcessCrossOriginSecurityHeaders();
+  if (NS_FAILED(rv)) {
+    mStatus = rv;
+    HandleAsyncAbort();
+    return rv;
+  }
+
+  nsAutoCString location;
+
+  // if a location header was not given, then we can't perform the redirect,
+  // so just carry on as though this were a normal response.
+  if (NS_FAILED(mResponseHead->GetHeader(nsHttp::Location, location))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If we were told to not follow redirects automatically, then again
+  // carry on as though this were a normal response.
+  if (mLoadInfo->GetDontFollowRedirects()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // make sure non-ASCII characters in the location header are escaped.
+  nsAutoCString locationBuf;
+  if (NS_EscapeURL(location.get(), -1, esc_OnlyNonASCII | esc_Spaces,
+                   locationBuf)) {
+    location = locationBuf;
+  }
+
+  mRedirectType = redirectType;
+
+  LOG(("redirecting to: %s [redirection-limit=%u]\n", location.get(),
+       uint32_t(mRedirectionLimit)));
+
+  rv = CreateNewURI(location.get(), getter_AddRefs(mRedirectURI));
+
+  if (NS_FAILED(rv)) {
+    LOG(("Invalid URI for redirect: Location: %s\n", location.get()));
+    return NS_ERROR_CORRUPTED_CONTENT;
+  }
+
+  if (!StaticPrefs::network_allow_redirect_to_data() &&
+      !mLoadInfo->GetAllowInsecureRedirectToDataURI() &&
+      mRedirectURI->SchemeIs("data")) {
+    LOG(("Invalid data URI for redirect!"));
+    nsContentSecurityManager::ReportBlockedDataURI(mRedirectURI, mLoadInfo,
+                                                   true);
+    return NS_ERROR_DOM_BAD_URI;
+  }
+
+  // Perform the URL query string stripping for redirects. We will only strip
+  // the query string if it is redirecting to a third-party URI in the top
+  // level.
+  if (StaticPrefs::privacy_query_stripping_redirect()) {
+    ThirdPartyUtil* thirdPartyUtil = ThirdPartyUtil::GetInstance();
+    bool isThirdPartyRedirectURI = true;
+    thirdPartyUtil->IsThirdPartyURI(mURI, mRedirectURI,
+                                    &isThirdPartyRedirectURI);
+    if (isThirdPartyRedirectURI && mLoadInfo->GetExternalContentPolicyType() ==
+                                       ExtContentPolicy::TYPE_DOCUMENT) {
+      Telemetry::AccumulateCategorical(
+          Telemetry::LABELS_QUERY_STRIPPING_COUNT::Redirect);
+
+      nsCOMPtr<nsIPrincipal> prin;
+      ContentBlockingAllowList::RecomputePrincipal(
+          mRedirectURI, mLoadInfo->GetOriginAttributes(), getter_AddRefs(prin));
+
+      bool isRedirectURIInAllowList = false;
+      if (prin) {
+        ContentBlockingAllowList::Check(prin, mPrivateBrowsing,
+                                        isRedirectURIInAllowList);
+      }
+
+      if (!isRedirectURIInAllowList) {
+        nsCOMPtr<nsIURI> strippedURI;
+
+        nsCOMPtr<nsIURLQueryStringStripper> queryStripper =
+            components::URLQueryStringStripper::Service(&rv);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        uint32_t numStripped;
+
+        rv = queryStripper->Strip(mRedirectURI, mPrivateBrowsing,
+                                  getter_AddRefs(strippedURI), &numStripped);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        if (numStripped) {
+          mUnstrippedRedirectURI = mRedirectURI;
+          mRedirectURI = strippedURI;
+
+          // Record telemetry, but only if we stripped any query params.
+          Telemetry::AccumulateCategorical(
+              Telemetry::LABELS_QUERY_STRIPPING_COUNT::StripForRedirect);
+          Telemetry::Accumulate(Telemetry::QUERY_STRIPPING_PARAM_COUNT,
+                                numStripped);
+        }
+      }
+    }
+  }
+
+  if (NS_WARN_IF(!mRedirectURI)) {
+    LOG(("Invalid redirect URI after performaing query string stripping"));
+    return NS_ERROR_FAILURE;
+  }
+
+  return ContinueProcessRedirectionAfterFallback(NS_OK);
+}
+
+nsresult nsHttpChannel::ContinueProcessRedirectionAfterFallback(nsresult rv) {
+  // Kill the current cache entry if we are redirecting
+  // back to ourself.
+  bool redirectingBackToSameURI = false;
+  if (mCacheEntry && LoadCacheEntryIsWriteOnly() &&
+      NS_SUCCEEDED(mURI->Equals(mRedirectURI, &redirectingBackToSameURI)) &&
+      redirectingBackToSameURI) {
+    mCacheEntry->AsyncDoom(nullptr);
+  }
+
+  // move the reference of the old location to the new one if the new
+  // one has none.
+  PropagateReferenceIfNeeded(mURI, mRedirectURI);
+
+  bool rewriteToGET =
+      ShouldRewriteRedirectToGET(mRedirectType, mRequestHead.ParsedMethod());
+
+  // prompt if the method is not safe (such as POST, PUT, DELETE, ...)
+  if (!rewriteToGET && !mRequestHead.IsSafeMethod()) {
+    rv = PromptTempRedirect();
+    if (NS_FAILED(rv)) return rv;
+  }
+
+  uint32_t redirectFlags;
+  if (nsHttp::IsPermanentRedirect(mRedirectType)) {
+    redirectFlags = nsIChannelEventSink::REDIRECT_PERMANENT;
+  } else {
+    redirectFlags = nsIChannelEventSink::REDIRECT_TEMPORARY;
+  }
+
+  nsCOMPtr<nsIIOService> ioService;
+  rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+  if (NS_FAILED(rv)) return rv;
+
+  nsCOMPtr<nsIChannel> newChannel;
+  nsCOMPtr<nsILoadInfo> redirectLoadInfo =
+      CloneLoadInfoForRedirect(mRedirectURI, redirectFlags);
+
+  // Propagate the unstripped redirect URI.
+  redirectLoadInfo->SetUnstrippedURI(mUnstrippedRedirectURI);
+
+  rv = NS_NewChannelInternal(getter_AddRefs(newChannel), mRedirectURI,
+                             redirectLoadInfo,
+                             nullptr,  // PerformanceStorage
+                             nullptr,  // aLoadGroup
+                             nullptr,  // aCallbacks
+                             nsIRequest::LOAD_NORMAL, ioService);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = SetupReplacementChannel(mRedirectURI, newChannel, !rewriteToGET,
+                               redirectFlags);
+  if (NS_FAILED(rv)) return rv;
+
+  // verify that this is a legal redirect
+  mRedirectChannel = newChannel;
+
+  PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
+  rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, redirectFlags);
+
+  if (NS_SUCCEEDED(rv)) rv = WaitForRedirectCallback();
+
+  if (NS_FAILED(rv)) {
+    AutoRedirectVetoNotifier notifier(this, rv);
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
+  }
+
+  return rv;
+}
+
+nsresult nsHttpChannel::ContinueProcessRedirection(nsresult rv) {
+  AutoRedirectVetoNotifier notifier(this, rv);
+
+  LOG(("nsHttpChannel::ContinueProcessRedirection [rv=%" PRIx32 ",this=%p]\n",
+       static_cast<uint32_t>(rv), this));
+  if (NS_FAILED(rv)) return rv;
+
+  MOZ_ASSERT(mRedirectChannel, "No redirect channel?");
+
+  // Make sure to do this after we received redirect veto answer,
+  // i.e. after all sinks had been notified
+  mRedirectChannel->SetOriginalURI(mOriginalURI);
+
+  // XXX we used to talk directly with the script security manager, but that
+  // should really be handled by the event sink implementation.
+
+  // begin loading the new channel
+  rv = mRedirectChannel->AsyncOpen(mListener);
+  LOG(("  new channel AsyncOpen returned %" PRIX32, static_cast<uint32_t>(rv)));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // close down this channel
+  Cancel(NS_BINDING_REDIRECTED);
+
+  notifier.RedirectSucceeded();
+
+  ReleaseListeners();
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel <auth>
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP nsHttpChannel::OnAuthAvailable() {
+  LOG(("nsHttpChannel::OnAuthAvailable [this=%p]", this));
+
+  // setting mAuthRetryPending flag and resuming the transaction
+  // triggers process of throwing away the unauthenticated data already
+  // coming from the network
+  mIsAuthChannel = true;
+  mAuthRetryPending = true;
+  StoreProxyAuthPending(false);
+  LOG(("Resuming the transaction, we got credentials from user"));
+  if (mTransactionPump) {
+    mTransactionPump->Resume();
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::OnAuthCancelled(bool userCancel) {
+  LOG(("nsHttpChannel::OnAuthCancelled [this=%p]", this));
+
+  if (mTransactionPump) {
+    // If the channel is trying to authenticate to a proxy and
+    // that was canceled we cannot show the http response body
+    // from the 40x as that might mislead the user into thinking
+    // it was a end host response instead of a proxy reponse.
+    // This must check explicitly whether a proxy auth was being done
+    // because we do want to show the content if this is an error from
+    // the origin server.
+    if (LoadProxyAuthPending()) Cancel(NS_ERROR_PROXY_CONNECTION_REFUSED);
+
+    // Make sure to process security headers before calling CallOnStartRequest.
+    nsresult rv = ProcessCrossOriginSecurityHeaders();
+    if (NS_FAILED(rv)) {
+      mStatus = rv;
+      HandleAsyncAbort();
+      return rv;
+    }
+
+    // ensure call of OnStartRequest of the current listener here,
+    // it would not be called otherwise at all
+    rv = CallOnStartRequest();
+
+    // drop mAuthRetryPending flag and resume the transaction
+    // this resumes load of the unauthenticated content data (which
+    // may have been canceled if we don't want to show it)
+    mAuthRetryPending = false;
+    LOG(("Resuming the transaction, user cancelled the auth dialog"));
+    mTransactionPump->Resume();
+
+    if (NS_FAILED(rv)) mTransactionPump->Cancel(rv);
+  }
+
+  StoreProxyAuthPending(false);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::CloseStickyConnection() {
+  LOG(("nsHttpChannel::CloseStickyConnection this=%p", this));
+
+  // Require we are between OnStartRequest and OnStopRequest, because
+  // what we do here takes effect in OnStopRequest (not reusing the
+  // connection for next authentication round).
+  if (!LoadIsPending()) {
+    LOG(("  channel not pending"));
+    NS_ERROR(
+        "CloseStickyConnection not called before OnStopRequest, won't have any "
+        "effect");
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  MOZ_ASSERT(mTransaction);
+  if (!mTransaction) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  if (!(mCaps & NS_HTTP_STICKY_CONNECTION ||
+        mTransaction->HasStickyConnection())) {
+    LOG(("  not sticky"));
+    return NS_OK;
+  }
+
+  mTransaction->DontReuseConnection();
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::ConnectionRestartable(bool aRestartable) {
+  LOG(("nsHttpChannel::ConnectionRestartable this=%p, restartable=%d", this,
+       aRestartable));
+  StoreAuthConnectionRestartable(aRestartable);
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsISupports
+//-----------------------------------------------------------------------------
+
+NS_IMPL_ADDREF_INHERITED(nsHttpChannel, HttpBaseChannel)
+NS_IMPL_RELEASE_INHERITED(nsHttpChannel, HttpBaseChannel)
+
+NS_INTERFACE_MAP_BEGIN(nsHttpChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIRequest)
+  NS_INTERFACE_MAP_ENTRY(nsIChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
+  NS_INTERFACE_MAP_ENTRY(nsIHttpChannel)
+  NS_INTERFACE_MAP_ENTRY(nsICacheInfoChannel)
+  NS_INTERFACE_MAP_ENTRY(nsICachingChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIClassOfService)
+  NS_INTERFACE_MAP_ENTRY(nsIUploadChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIFormPOSTActionChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIUploadChannel2)
+  NS_INTERFACE_MAP_ENTRY(nsICacheEntryOpenCallback)
+  NS_INTERFACE_MAP_ENTRY(nsIHttpChannelInternal)
+  NS_INTERFACE_MAP_ENTRY(nsIResumableChannel)
+  NS_INTERFACE_MAP_ENTRY(nsITransportEventSink)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
+  NS_INTERFACE_MAP_ENTRY(nsIProtocolProxyCallback)
+  NS_INTERFACE_MAP_ENTRY(nsIProxiedChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIHttpAuthenticableChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIAsyncVerifyRedirectCallback)
+  NS_INTERFACE_MAP_ENTRY(nsIThreadRetargetableRequest)
+  NS_INTERFACE_MAP_ENTRY(nsIThreadRetargetableStreamListener)
+  NS_INTERFACE_MAP_ENTRY(nsIDNSListener)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsICorsPreflightCallback)
+  NS_INTERFACE_MAP_ENTRY(nsIRaceCacheWithNetwork)
+  NS_INTERFACE_MAP_ENTRY(nsIRequestTailUnblockCallback)
+  NS_INTERFACE_MAP_ENTRY_CONCRETE(nsHttpChannel)
+  NS_INTERFACE_MAP_ENTRY(nsIEarlyHintObserver)
+NS_INTERFACE_MAP_END_INHERITING(HttpBaseChannel)
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIRequest
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP nsHttpChannel::SetCanceledReason(const nsACString& aReason) {
+  return SetCanceledReasonImpl(aReason);
+}
+
+NS_IMETHODIMP nsHttpChannel::GetCanceledReason(nsACString& aReason) {
+  return GetCanceledReasonImpl(aReason);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::CancelWithReason(nsresult aStatus, const nsACString& aReason) {
+  return CancelWithReasonImpl(aStatus, aReason);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Cancel(nsresult status) {
+  MOZ_ASSERT(NS_IsMainThread());
+  // We should never have a pump open while a CORS preflight is in progress.
+  MOZ_ASSERT_IF(mPreflightChannel, !mCachePump);
+#ifdef DEBUG
+  // We want to perform this check only when the chanel is being cancelled the
+  // first time with a URL classifier blocking error code.  If mStatus is
+  // already set to such an error code then Cancel() may be called for some
+  // other reason, for example because we've received notification about our
+  // parent process side channel being canceled, in which case we cannot expect
+  // that CancelByURLClassifier() would have handled this case.
+  if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(status) &&
+      !UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(mStatus)) {
+    MOZ_CRASH_UNSAFE_PRINTF("Blocking classifier error %" PRIx32
+                            " need to be handled by CancelByURLClassifier()",
+                            static_cast<uint32_t>(status));
+  }
+#endif
+
+  LOG(("nsHttpChannel::Cancel [this=%p status=%" PRIx32 ", reason=%s]\n", this,
+       static_cast<uint32_t>(status), mCanceledReason.get()));
+  MOZ_ASSERT_IF(!(mConnectionInfo && mConnectionInfo->UsingConnect()) &&
+                    NS_SUCCEEDED(mStatus),
+                !AllowedErrorForHTTPSRRFallback(status));
+
+  mEarlyHintObserver = nullptr;
+  mWebTransportSessionEventListener = nullptr;
+
+  if (mCanceled) {
+    LOG(("  ignoring; already canceled\n"));
+    return NS_OK;
+  }
+
+  LogCallingScriptLocation(this);
+
+  if (LoadWaitingForRedirectCallback()) {
+    LOG(("channel canceled during wait for redirect callback"));
+  }
+
+  return CancelInternal(status);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::CancelByURLClassifier(nsresult aErrorCode) {
+  MOZ_ASSERT(
+      UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode));
+  MOZ_ASSERT(NS_IsMainThread());
+  // We should never have a pump open while a CORS preflight is in progress.
+  MOZ_ASSERT_IF(mPreflightChannel, !mCachePump);
+
+  LOG(("nsHttpChannel::CancelByURLClassifier [this=%p]\n", this));
+
+  if (mCanceled) {
+    LOG(("  ignoring; already canceled\n"));
+    return NS_OK;
+  }
+
+  // We are being canceled by the channel classifier because of tracking
+  // protection, but we haven't yet had a chance to dispatch the
+  // "http-on-modify-request" notifications yet (this would normally be
+  // done in PrepareToConnect()).  So do that now, before proceeding to
+  // cancel.
+  //
+  // Note that running these observers can itself result in the channel
+  // being canceled.  In that case, we accept that cancelation code as
+  // the cause of the cancelation, as if the classification of the channel
+  // would have occurred past this point!
+
+  // notify "http-on-modify-request" observers
+  CallOnModifyRequestObservers();
+
+  // Check if request was cancelled during on-modify-request
+  if (mCanceled) {
+    return mStatus;
+  }
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume in Cancel [this=%p]\n", this));
+    MOZ_ASSERT(!mCallOnResume);
+    StoreChannelClassifierCancellationPending(1);
+    mCallOnResume = [aErrorCode](nsHttpChannel* self) {
+      self->HandleContinueCancellingByURLClassifier(aErrorCode);
+      return NS_OK;
+    };
+    return NS_OK;
+  }
+
+  // Check to see if we should redirect this channel elsewhere by
+  // nsIHttpChannel.redirectTo API request
+  if (mAPIRedirectToURI) {
+    StoreChannelClassifierCancellationPending(1);
+    return AsyncCall(&nsHttpChannel::HandleAsyncAPIRedirect);
+  }
+
+  return CancelInternal(aErrorCode);
+}
+
+void nsHttpChannel::ContinueCancellingByURLClassifier(nsresult aErrorCode) {
+  MOZ_ASSERT(
+      UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aErrorCode));
+  MOZ_ASSERT(NS_IsMainThread());
+  // We should never have a pump open while a CORS preflight is in progress.
+  MOZ_ASSERT_IF(mPreflightChannel, !mCachePump);
+
+  LOG(("nsHttpChannel::ContinueCancellingByURLClassifier [this=%p]\n", this));
+  if (mCanceled) {
+    LOG(("  ignoring; already canceled\n"));
+    return;
+  }
+
+  // Check to see if we should redirect this channel elsewhere by
+  // nsIHttpChannel.redirectTo API request
+  if (mAPIRedirectToURI) {
+    Unused << AsyncCall(&nsHttpChannel::HandleAsyncAPIRedirect);
+    return;
+  }
+
+  Unused << CancelInternal(aErrorCode);
+}
+
+nsresult nsHttpChannel::CancelInternal(nsresult status) {
+  LOG(("nsHttpChannel::CancelInternal [this=%p]\n", this));
+  bool channelClassifierCancellationPending =
+      !!LoadChannelClassifierCancellationPending();
+  if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(status)) {
+    StoreChannelClassifierCancellationPending(0);
+  }
+
+  // We don't want the content process to see any header values
+  // when the request is blocked by ORB
+  if (mChannelBlockedByOpaqueResponse && mCachedOpaqueResponseBlockingPref) {
+    mResponseHead->ClearHeaders();
+  }
+
+  mEarlyHintObserver = nullptr;
+  mWebTransportSessionEventListener = nullptr;
+  mCanceled = true;
+  mStatus = NS_FAILED(status) ? status : NS_ERROR_ABORT;
+
+  if (mLastStatusReported && !mEndMarkerAdded &&
+      profiler_thread_is_being_profiled_for_markers()) {
+    // These do allocations/frees/etc; avoid if not active
+    // mLastStatusReported can be null if Cancel is called before we added the
+    // start marker.
+    mEndMarkerAdded = true;
+
+    nsAutoCString requestMethod;
+    GetRequestMethod(requestMethod);
+
+    int32_t priority = PRIORITY_NORMAL;
+    GetPriority(&priority);
+
+    uint64_t size = 0;
+    GetEncodedBodySize(&size);
+
+    profiler_add_network_marker(
+        mURI, requestMethod, priority, mChannelId, NetworkLoadType::LOAD_CANCEL,
+        mLastStatusReported, TimeStamp::Now(), size, mCacheDisposition,
+        mLoadInfo->GetInnerWindowID(),
+        mLoadInfo->GetOriginAttributes().mPrivateBrowsingId > 0,
+        &mTransactionTimings, std::move(mSource));
+  }
+
+  // If we don't have mTransactionPump and mCachePump, we need to call
+  // AsyncAbort to make sure this channel's listener got notified.
+  bool needAsyncAbort = !mTransactionPump && !mCachePump;
+
+  if (mProxyRequest) mProxyRequest->Cancel(status);
+  CancelNetworkRequest(status);
+  mCacheInputStream.CloseAndRelease();
+  if (mCachePump) mCachePump->Cancel(status);
+  if (mAuthProvider) mAuthProvider->Cancel(status);
+  if (mPreflightChannel) mPreflightChannel->Cancel(status);
+  if (mRequestContext && mOnTailUnblock) {
+    mOnTailUnblock = nullptr;
+    mRequestContext->CancelTailedRequest(this);
+    CloseCacheEntry(false);
+    needAsyncAbort = false;
+    Unused << AsyncAbort(status);
+  } else if (channelClassifierCancellationPending) {
+    // If mCallOnResume is not null here, it's set in
+    // nsHttpChannel::CancelByURLClassifier. We can override mCallOnResume since
+    // mCanceled is true and nsHttpChannel::ContinueCancellingByURLClassifier
+    // does nothing.
+    if (mCallOnResume) {
+      mCallOnResume = nullptr;
+    }
+    // If we're coming from an asynchronous path when canceling a channel due
+    // to safe-browsing protection, we need to AsyncAbort the channel now.
+    needAsyncAbort = false;
+    Unused << AsyncAbort(status);
+  }
+
+  // If we already have mCallOnResume, AsyncAbort will be called in
+  // ResumeInternal.
+  if (needAsyncAbort && !mCallOnResume && !mSuspendCount) {
+    LOG(("nsHttpChannel::CancelInternal do AsyncAbort [this=%p]\n", this));
+    CloseCacheEntry(false);
+    Unused << AsyncAbort(status);
+  }
+  return NS_OK;
+}
+
+void nsHttpChannel::CancelNetworkRequest(nsresult aStatus) {
+  if (mTransaction) {
+    nsresult rv = gHttpHandler->CancelTransaction(mTransaction, aStatus);
+    if (NS_FAILED(rv)) {
+      LOG(("failed to cancel the transaction\n"));
+    }
+  }
+  if (mTransactionPump) mTransactionPump->Cancel(aStatus);
+
+  mEarlyHintObserver = nullptr;
+  mWebTransportSessionEventListener = nullptr;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Suspend() {
+  NS_ENSURE_TRUE(LoadIsPending(), NS_ERROR_NOT_AVAILABLE);
+
+  LOG(("nsHttpChannel::SuspendInternal [this=%p]\n", this));
+  LogCallingScriptLocation(this);
+
+  ++mSuspendCount;
+
+  if (mSuspendCount == 1) {
+    mSuspendTimestamp = TimeStamp::NowLoRes();
+  }
+
+  nsresult rvTransaction = NS_OK;
+  if (mTransactionPump) {
+    rvTransaction = mTransactionPump->Suspend();
+  }
+  nsresult rvCache = NS_OK;
+  if (mCachePump) {
+    rvCache = mCachePump->Suspend();
+  }
+
+  return NS_FAILED(rvTransaction) ? rvTransaction : rvCache;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Resume() {
+  NS_ENSURE_TRUE(mSuspendCount > 0, NS_ERROR_UNEXPECTED);
+
+  LOG(("nsHttpChannel::ResumeInternal [this=%p]\n", this));
+  LogCallingScriptLocation(this);
+
+  if (--mSuspendCount == 0) {
+    mSuspendTotalTime +=
+        (TimeStamp::NowLoRes() - mSuspendTimestamp).ToMilliseconds();
+
+    if (mCallOnResume) {
+      // Resume the interrupted procedure first, then resume
+      // the pump to continue process the input stream.
+      // Any newly created pump MUST be suspended to prevent calling
+      // its OnStartRequest before OnStopRequest of any pre-existing
+      // pump.  AsyncResumePending ensures that.
+      MOZ_ASSERT(!LoadAsyncResumePending());
+      StoreAsyncResumePending(1);
+
+      std::function<nsresult(nsHttpChannel*)> callOnResume = nullptr;
+      std::swap(callOnResume, mCallOnResume);
+
+      RefPtr<nsHttpChannel> self(this);
+      nsCOMPtr<nsIRequest> transactionPump = mTransactionPump;
+      RefPtr<nsInputStreamPump> cachePump = mCachePump;
+
+      nsresult rv = NS_DispatchToCurrentThread(NS_NewRunnableFunction(
+          "nsHttpChannel::CallOnResume",
+          [callOnResume{std::move(callOnResume)}, self{std::move(self)},
+           transactionPump{std::move(transactionPump)},
+           cachePump{std::move(cachePump)}]() {
+            MOZ_ASSERT(self->LoadAsyncResumePending());
+            nsresult rv = self->CallOrWaitForResume(callOnResume);
+            if (NS_FAILED(rv)) {
+              self->CloseCacheEntry(false);
+              Unused << self->AsyncAbort(rv);
+            }
+            MOZ_ASSERT(self->LoadAsyncResumePending());
+
+            self->StoreAsyncResumePending(0);
+
+            // And now actually resume the previously existing pumps.
+            if (transactionPump) {
+              LOG(
+                  ("nsHttpChannel::CallOnResume resuming previous transaction "
+                   "pump %p, this=%p",
+                   transactionPump.get(), self.get()));
+              transactionPump->Resume();
+            }
+            if (cachePump) {
+              LOG(
+                  ("nsHttpChannel::CallOnResume resuming previous cache pump "
+                   "%p, this=%p",
+                   cachePump.get(), self.get()));
+              cachePump->Resume();
+            }
+
+            // Any newly created pumps were suspended once because of
+            // AsyncResumePending. Problem is that the stream listener
+            // notification is already pending in the queue right now, because
+            // AsyncRead doesn't (regardless if called after Suspend) respect
+            // the suspend coutner and the right order would not be preserved.
+            // Hence, we do another dispatch round to actually Resume after
+            // the notification from the original pump.
+            if (transactionPump != self->mTransactionPump &&
+                self->mTransactionPump) {
+              LOG(
+                  ("nsHttpChannel::CallOnResume async-resuming new "
+                   "transaction "
+                   "pump %p, this=%p",
+                   self->mTransactionPump.get(), self.get()));
+
+              nsCOMPtr<nsIRequest> pump = self->mTransactionPump;
+              NS_DispatchToCurrentThread(NS_NewRunnableFunction(
+                  "nsHttpChannel::CallOnResume new transaction",
+                  [pump{std::move(pump)}]() { pump->Resume(); }));
+            }
+            if (cachePump != self->mCachePump && self->mCachePump) {
+              LOG(
+                  ("nsHttpChannel::CallOnResume async-resuming new cache pump "
+                   "%p, this=%p",
+                   self->mCachePump.get(), self.get()));
+
+              RefPtr<nsInputStreamPump> pump = self->mCachePump;
+              NS_DispatchToCurrentThread(NS_NewRunnableFunction(
+                  "nsHttpChannel::CallOnResume new pump",
+                  [pump{std::move(pump)}]() { pump->Resume(); }));
+            }
+          }));
+      NS_ENSURE_SUCCESS(rv, rv);
+      return rv;
+    }
+  }
+
+  nsresult rvTransaction = NS_OK;
+  if (mTransactionPump) {
+    rvTransaction = mTransactionPump->Resume();
+  }
+
+  nsresult rvCache = NS_OK;
+  if (mCachePump) {
+    rvCache = mCachePump->Resume();
+  }
+
+  return NS_FAILED(rvTransaction) ? rvTransaction : rvCache;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetSecurityInfo(nsITransportSecurityInfo** securityInfo) {
+  NS_ENSURE_ARG_POINTER(securityInfo);
+  *securityInfo = do_AddRef(mSecurityInfo).take();
+  return NS_OK;
+}
+
+// If any of the functions that AsyncOpen calls returns immediately an error
+// AsyncAbort(which calls onStart/onStopRequest) does not need to be call.
+// To be sure that they are not call ReleaseListeners() is called.
+// If AsyncOpen returns NS_OK, after that point AsyncAbort must be called on
+// any error.
+NS_IMETHODIMP
+nsHttpChannel::AsyncOpen(nsIStreamListener* aListener) {
+  nsCOMPtr<nsIStreamListener> listener = aListener;
+  nsresult rv =
+      nsContentSecurityManager::doContentSecurityCheck(this, listener);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    ReleaseListeners();
+    return rv;
+  }
+
+  MOZ_ASSERT(
+      mLoadInfo->GetSecurityMode() == 0 ||
+          mLoadInfo->GetInitialSecurityCheckDone() ||
+          (mLoadInfo->GetSecurityMode() ==
+               nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL &&
+           mLoadInfo->GetLoadingPrincipal() &&
+           mLoadInfo->GetLoadingPrincipal()->IsSystemPrincipal()),
+      "security flags in loadInfo but doContentSecurityCheck() not called");
+
+  LOG(("nsHttpChannel::AsyncOpen [this=%p]\n", this));
+  mOpenerCallingScriptLocation = CallingScriptLocationString();
+  LogCallingScriptLocation(this, mOpenerCallingScriptLocation);
+  NS_CompareLoadInfoAndLoadContext(this);
+
+#ifdef DEBUG
+  AssertPrivateBrowsingId();
+#endif
+
+  NS_ENSURE_ARG_POINTER(listener);
+  NS_ENSURE_TRUE(!LoadIsPending(), NS_ERROR_IN_PROGRESS);
+  NS_ENSURE_TRUE(!LoadWasOpened(), NS_ERROR_ALREADY_OPENED);
+
+  if (mCanceled) {
+    ReleaseListeners();
+    return NS_FAILED(mStatus) ? mStatus : NS_ERROR_FAILURE;
+  }
+
+  if (MaybeWaitForUploadStreamNormalization(listener, nullptr)) {
+    return NS_OK;
+  }
+
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!gHttpHandler->Active()) {
+    LOG(("  after HTTP shutdown..."));
+    ReleaseListeners();
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  rv = NS_CheckPortSafety(mURI);
+  if (NS_FAILED(rv)) {
+    ReleaseListeners();
+    return rv;
+  }
+
+  // If no one called SetLoadGroup or SetNotificationCallbacks, the private
+  // state has not been updated on PrivateBrowsingChannel (which we derive
+  // from) Same if the loadinfo has changed since the creation of the channel.
+  // Hence, we have to call UpdatePrivateBrowsing() here
+  UpdatePrivateBrowsing();
+
+  AntiTrackingUtils::UpdateAntiTrackingInfoForChannel(this);
+
+  if (WaitingForTailUnblock()) {
+    // This channel is marked as Tail and is part of a request context
+    // that has positive number of non-tailed requestst, hence this channel
+    // has been put to a queue.
+    // When tail is unblocked, OnTailUnblock on this channel will be called
+    // to continue AsyncOpen.
+    mListener = listener;
+    MOZ_DIAGNOSTIC_ASSERT(!mOnTailUnblock);
+    mOnTailUnblock = &nsHttpChannel::AsyncOpenOnTailUnblock;
+
+    LOG(("  put on hold until tail is unblocked"));
+    return NS_OK;
+  }
+
+  // Remember the cookie header that was set, if any
+  nsAutoCString cookieHeader;
+  if (NS_SUCCEEDED(mRequestHead.GetHeader(nsHttp::Cookie, cookieHeader))) {
+    mUserSetCookieHeader = cookieHeader;
+  }
+
+  // Set user agent override, do so before OnOpeningRequest notification
+  // since we want to allow consumers of that notification change or remove
+  // the User-Agent request header.
+  HttpBaseChannel::SetDocshellUserAgentOverride();
+
+  // After we notify any observers (on-opening-request, loadGroup, etc) we
+  // must return NS_OK and return any errors asynchronously via
+  // OnStart/OnStopRequest.  Observers may add a reference to the channel
+  // and expect to get OnStopRequest so they know when to drop the reference,
+  // etc.
+
+  // notify "http-on-opening-request" observers, but not if this is a redirect
+  if (!(mLoadFlags & LOAD_REPLACE)) {
+    gHttpHandler->OnOpeningRequest(this);
+  }
+
+  StoreIsPending(true);
+  StoreWasOpened(true);
+
+  mListener = listener;
+
+  if (nsIOService::UseSocketProcess() &&
+      !gIOService->IsSocketProcessLaunchComplete()) {
+    RefPtr<nsHttpChannel> self = this;
+    gIOService->CallOrWaitForSocketProcess(
+        [self]() { self->AsyncOpenFinal(TimeStamp::Now()); });
+    return NS_OK;
+  }
+
+  AsyncOpenFinal(TimeStamp::Now());
+
+  return NS_OK;
+}
+
+void nsHttpChannel::AsyncOpenFinal(TimeStamp aTimeStamp) {
+  // We save this timestamp from outside of the if block in case we enable the
+  // profiler after AsyncOpen().
+  mLastStatusReported = TimeStamp::Now();
+  if (profiler_thread_is_being_profiled_for_markers()) {
+    nsAutoCString requestMethod;
+    GetRequestMethod(requestMethod);
+
+    profiler_add_network_marker(
+        mURI, requestMethod, mPriority, mChannelId, NetworkLoadType::LOAD_START,
+        mChannelCreationTimestamp, mLastStatusReported, 0, mCacheDisposition,
+        mLoadInfo->GetInnerWindowID(),
+        mLoadInfo->GetOriginAttributes().mPrivateBrowsingId > 0);
+  }
+
+  // Added due to PauseTask/DelayHttpChannel
+  if (mLoadGroup) mLoadGroup->AddRequest(this, nullptr);
+
+  // record asyncopen time unconditionally and clear it if we
+  // don't want it after OnModifyRequest() weighs in. But waiting for
+  // that to complete would mean we don't include proxy resolution in the
+  // timing.
+  if (!LoadAsyncOpenTimeOverriden()) {
+    mAsyncOpenTime = aTimeStamp;
+  }
+
+  // Remember we have Authorization header set here.  We need to check on it
+  // just once and early, AsyncOpen is the best place.
+  StoreCustomAuthHeader(mRequestHead.HasHeader(nsHttp::Authorization));
+
+  bool willCallback = false;
+  // We are about to do an async lookup to check if the URI is a tracker. If
+  // yes, this channel will be canceled by channel classifier.  Chances are the
+  // lookup is not needed so CheckIsTrackerWithLocalTable() will return an
+  // error and then we can MaybeResolveProxyAndBeginConnect() right away.
+  if (NS_ShouldClassifyChannel(this)) {
+    RefPtr<nsHttpChannel> self = this;
+    willCallback = NS_SUCCEEDED(
+        AsyncUrlChannelClassifier::CheckChannel(this, [self]() -> void {
+          nsCOMPtr<nsIURI> uri;
+          self->GetURI(getter_AddRefs(uri));
+          MOZ_ASSERT(uri);
+
+          // Finish the AntiTracking Heuristic before
+          // MaybeResolveProxyAndBeginConnect().
+          FinishAntiTrackingRedirectHeuristic(self, uri);
+
+          self->MaybeResolveProxyAndBeginConnect();
+        }));
+  }
+
+  if (!willCallback) {
+    // We can do MaybeResolveProxyAndBeginConnect immediately if
+    // CheckIsTrackerWithLocalTable is failed. Note that we don't need to
+    // handle the failure because BeginConnect() will return synchronously and
+    // the caller will be responsible for handling it.
+    MaybeResolveProxyAndBeginConnect();
+  }
+}
+
+void nsHttpChannel::MaybeResolveProxyAndBeginConnect() {
+  nsresult rv;
+
+  // The common case for HTTP channels is to begin proxy resolution and return
+  // at this point. The only time we know mProxyInfo already is if we're
+  // proxying a non-http protocol like ftp. We don't need to discover proxy
+  // settings if we are never going to make a network connection.
+  if (!mProxyInfo &&
+      !(mLoadFlags & (LOAD_ONLY_FROM_CACHE | LOAD_NO_NETWORK_IO)) &&
+      !BypassProxy() && NS_SUCCEEDED(ResolveProxy())) {
+    return;
+  }
+
+  if (!gHttpHandler->Active()) {
+    LOG(
+        ("nsHttpChannel::MaybeResolveProxyAndBeginConnect [this=%p] "
+         "Handler no longer active.\n",
+         this));
+    rv = NS_ERROR_NOT_AVAILABLE;
+  } else {
+    rv = BeginConnect();
+  }
+  if (NS_FAILED(rv)) {
+    CloseCacheEntry(false);
+    Unused << AsyncAbort(rv);
+  }
+}
+
+nsresult nsHttpChannel::AsyncOpenOnTailUnblock() {
+  return AsyncOpen(mListener);
+}
+
+already_AddRefed<nsChannelClassifier>
+nsHttpChannel::GetOrCreateChannelClassifier() {
+  if (!mChannelClassifier) {
+    mChannelClassifier = new nsChannelClassifier(this);
+    LOG(("nsHttpChannel [%p] created nsChannelClassifier [%p]\n", this,
+         mChannelClassifier.get()));
+  }
+
+  RefPtr<nsChannelClassifier> classifier = mChannelClassifier;
+  return classifier.forget();
+}
+
+uint16_t nsHttpChannel::GetProxyDNSStrategy() {
+  // This function currently only supports returning DNS_PREFETCH_ORIGIN.
+  // Support for the rest of the DNS_* flags will be added later.
+
+  if (!mProxyInfo) {
+    return DNS_PREFETCH_ORIGIN;
+  }
+
+  nsAutoCString type;
+  mProxyInfo->GetType(type);
+
+  if (!StaticPrefs::network_proxy_socks_remote_dns()) {
+    if (type.EqualsLiteral("socks")) {
+      return DNS_PREFETCH_ORIGIN;
+    }
+  }
+
+  return 0;
+}
+
+// BeginConnect() SHOULD NOT call AsyncAbort(). AsyncAbort will be called by
+// functions that called BeginConnect if needed. Only
+// MaybeResolveProxyAndBeginConnect and OnProxyAvailable ever call
+// BeginConnect.
+nsresult nsHttpChannel::BeginConnect() {
+  LOG(("nsHttpChannel::BeginConnect [this=%p]\n", this));
+  nsresult rv;
+
+  // It is the caller's responsibility to not call us late in shutdown.
+  MOZ_ASSERT(gHttpHandler->Active());
+
+  // Construct connection info object
+  nsAutoCString host;
+  nsAutoCString scheme;
+  int32_t port = -1;
+  bool isHttps = mURI->SchemeIs("https");
+
+  rv = mURI->GetScheme(scheme);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetAsciiHost(host);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetPort(&port);
+  if (NS_SUCCEEDED(rv)) rv = mURI->GetAsciiSpec(mSpec);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // Just a warning here because some nsIURIs do not implement this method.
+  Unused << NS_WARN_IF(NS_FAILED(mURI->GetUsername(mUsername)));
+
+  // Reject the URL if it doesn't specify a host
+  if (host.IsEmpty()) {
+    rv = NS_ERROR_MALFORMED_URI;
+    return rv;
+  }
+  LOG(("host=%s port=%d\n", host.get(), port));
+  LOG(("uri=%s\n", mSpec.get()));
+
+  nsCOMPtr<nsProxyInfo> proxyInfo;
+  if (mProxyInfo) proxyInfo = do_QueryInterface(mProxyInfo);
+
+  if (mCaps & NS_HTTP_CONNECT_ONLY) {
+    if (!proxyInfo) {
+      LOG(("return failure: no proxy for connect-only channel\n"));
+      return NS_ERROR_FAILURE;
+    }
+
+    if (!proxyInfo->IsHTTP() && !proxyInfo->IsHTTPS()) {
+      LOG(("return failure: non-http proxy for connect-only channel\n"));
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  mRequestHead.SetHTTPS(isHttps);
+  mRequestHead.SetOrigin(scheme, host, port);
+
+  SetOriginHeader();
+  SetDoNotTrack();
+  SetGlobalPrivacyControl();
+
+  OriginAttributes originAttributes;
+  // Regular principal in case we have a proxy.
+  if (proxyInfo &&
+      !StaticPrefs::privacy_partition_network_state_connection_with_proxy()) {
+    StoragePrincipalHelper::GetOriginAttributes(
+        this, originAttributes, StoragePrincipalHelper::eRegularPrincipal);
+  } else {
+    StoragePrincipalHelper::GetOriginAttributesForNetworkState(
+        this, originAttributes);
+  }
+
+  // Adjust mCaps according to our request headers:
+  //  - If "Connection: close" is set as a request header, then do not bother
+  //    trying to establish a keep-alive connection.
+  if (mRequestHead.HasHeaderValue(nsHttp::Connection, "close")) {
+    mCaps &= ~(NS_HTTP_ALLOW_KEEPALIVE);
+    StoreAllowHttp3(false);
+  }
+
+  gHttpHandler->MaybeAddAltSvcForTesting(mURI, mUsername, mPrivateBrowsing,
+                                         mCallbacks, originAttributes);
+
+  RefPtr<nsHttpConnectionInfo> connInfo;
+#ifdef FUZZING
+  if (StaticPrefs::fuzzing_necko_http3()) {
+    connInfo =
+        new nsHttpConnectionInfo(host, port, "h3"_ns, mUsername, proxyInfo,
+                                 originAttributes, host, port, true);
+  } else {
+#endif
+    if (mWebTransportSessionEventListener) {
+      connInfo =
+          new nsHttpConnectionInfo(host, port, "h3"_ns, mUsername, proxyInfo,
+                                   originAttributes, isHttps, true, true);
+    } else {
+      connInfo = new nsHttpConnectionInfo(host, port, ""_ns, mUsername,
+                                          proxyInfo, originAttributes, isHttps);
+    }
+#ifdef FUZZING
+  }
+#endif
+
+  bool http2Allowed = !gHttpHandler->IsHttp2Excluded(connInfo);
+
+  bool http3Allowed = Http3Allowed();
+  if (!http3Allowed) {
+    mCaps |= NS_HTTP_DISALLOW_HTTP3;
+  }
+
+  RefPtr<AltSvcMapping> mapping;
+  if (!mConnectionInfo && LoadAllowAltSvc() &&  // per channel
+      !mWebTransportSessionEventListener && (http2Allowed || http3Allowed) &&
+      !(mLoadFlags & LOAD_FRESH_CONNECTION) &&
+      AltSvcMapping::AcceptableProxy(proxyInfo) &&
+      (scheme.EqualsLiteral("http") || scheme.EqualsLiteral("https")) &&
+      (mapping = gHttpHandler->GetAltServiceMapping(
+           scheme, host, port, mPrivateBrowsing, originAttributes, http2Allowed,
+           http3Allowed))) {
+    LOG(("nsHttpChannel %p Alt Service Mapping Found %s://%s:%d [%s]\n", this,
+         scheme.get(), mapping->AlternateHost().get(), mapping->AlternatePort(),
+         mapping->HashKey().get()));
+
+    if (!(mLoadFlags & LOAD_ANONYMOUS) && !mPrivateBrowsing) {
+      nsAutoCString altUsedLine(mapping->AlternateHost());
+      bool defaultPort =
+          mapping->AlternatePort() ==
+          (isHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT);
+      if (!defaultPort) {
+        altUsedLine.AppendLiteral(":");
+        altUsedLine.AppendInt(mapping->AlternatePort());
+      }
+      // Like what we did for 'Authorization' header, we need to do the same for
+      // 'Alt-Used' for avoiding this header being shown in the ServiceWorker
+      // FetchEvent.
+      Unused << mRequestHead.ClearHeader(nsHttp::Alternate_Service_Used);
+      rv = mRequestHead.SetHeader(nsHttp::Alternate_Service_Used, altUsedLine,
+                                  false,
+                                  nsHttpHeaderArray::eVarietyRequestDefault);
+      MOZ_ASSERT(NS_SUCCEEDED(rv));
+    }
+
+    nsCOMPtr<nsIConsoleService> consoleService =
+        do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+    if (consoleService && !host.Equals(mapping->AlternateHost())) {
+      nsAutoString message(u"Alternate Service Mapping found: "_ns);
+      AppendASCIItoUTF16(scheme, message);
+      message.AppendLiteral(u"://");
+      AppendASCIItoUTF16(host, message);
+      message.AppendLiteral(u":");
+      message.AppendInt(port);
+      message.AppendLiteral(u" to ");
+      AppendASCIItoUTF16(scheme, message);
+      message.AppendLiteral(u"://");
+      AppendASCIItoUTF16(mapping->AlternateHost(), message);
+      message.AppendLiteral(u":");
+      message.AppendInt(mapping->AlternatePort());
+      consoleService->LogStringMessage(message.get());
+    }
+
+    LOG(("nsHttpChannel %p Using connection info from altsvc mapping", this));
+    mapping->GetConnectionInfo(getter_AddRefs(mConnectionInfo), proxyInfo,
+                               originAttributes);
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, true);
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC_OE, !isHttps);
+  } else if (mConnectionInfo) {
+    LOG(("nsHttpChannel %p Using channel supplied connection info", this));
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, false);
+  } else {
+    LOG(("nsHttpChannel %p Using default connection info", this));
+
+    mConnectionInfo = connInfo;
+    Telemetry::Accumulate(Telemetry::HTTP_TRANSACTION_USE_ALTSVC, false);
+  }
+
+  bool httpsRRAllowed =
+      !LoadBeConservative() && !(mCaps & NS_HTTP_BE_CONSERVATIVE) &&
+      !(mLoadInfo->TriggeringPrincipal()->IsSystemPrincipal() &&
+        mLoadInfo->GetExternalContentPolicyType() !=
+            ExtContentPolicy::TYPE_DOCUMENT) &&
+      !mConnectionInfo->UsingConnect();
+  if (!httpsRRAllowed) {
+    mCaps |= NS_HTTP_DISALLOW_HTTPS_RR;
+  }
+  // No need to lookup HTTPSSVC record if mHTTPSSVCRecord already contains a
+  // value.
+  StoreUseHTTPSSVC(StaticPrefs::network_dns_upgrade_with_https_rr() &&
+                   httpsRRAllowed && mHTTPSSVCRecord.isNothing());
+
+  // Need to re-ask the handler, since mConnectionInfo may not be the connInfo
+  // we used earlier
+  if (!mConnectionInfo->IsHttp3() &&
+      gHttpHandler->IsHttp2Excluded(mConnectionInfo)) {
+    StoreAllowSpdy(0);
+    mCaps |= NS_HTTP_DISALLOW_SPDY;
+    mConnectionInfo->SetNoSpdy(true);
+  }
+
+  mAuthProvider = new nsHttpChannelAuthProvider();
+  rv = mAuthProvider->Init(this);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // check to see if authorization headers should be included
+  // CustomAuthHeader is set in AsyncOpen if we find Authorization header
+  rv = mAuthProvider->AddAuthorizationHeaders(LoadCustomAuthHeader());
+  if (NS_FAILED(rv)) {
+    LOG(("nsHttpChannel %p AddAuthorizationHeaders failed (%08x)", this,
+         static_cast<uint32_t>(rv)));
+  }
+
+  // If TimingEnabled flag is not set after OnModifyRequest() then
+  // clear the already recorded AsyncOpen value for consistency.
+  if (!LoadTimingEnabled()) mAsyncOpenTime = TimeStamp();
+
+  // if this somehow fails we can go on without it
+  Unused << gHttpHandler->AddConnectionHeader(&mRequestHead, mCaps);
+
+  if (!LoadIsTRRServiceChannel() &&
+      (mLoadFlags & VALIDATE_ALWAYS ||
+       BYPASS_LOCAL_CACHE(mLoadFlags, LoadPreferCacheLoadOverBypass()))) {
+    mCaps |= NS_HTTP_REFRESH_DNS;
+  }
+
+  if (gHttpHandler->CriticalRequestPrioritization()) {
+    if (mClassOfService.Flags() & nsIClassOfService::Leader) {
+      mCaps |= NS_HTTP_LOAD_AS_BLOCKING;
+    }
+    if (mClassOfService.Flags() & nsIClassOfService::Unblocked) {
+      mCaps |= NS_HTTP_LOAD_UNBLOCKED;
+    }
+    if (mClassOfService.Flags() & nsIClassOfService::UrgentStart &&
+        gHttpHandler->IsUrgentStartEnabled()) {
+      mCaps |= NS_HTTP_URGENT_START;
+      SetPriority(nsISupportsPriority::PRIORITY_HIGHEST);
+    }
+  }
+
+  // Force-Reload should reset the persistent connection pool for this host
+  if (mLoadFlags & LOAD_FRESH_CONNECTION) {
+    // just the initial document resets the whole pool
+    if (mLoadFlags & LOAD_INITIAL_DOCUMENT_URI) {
+      gHttpHandler->AltServiceCache()->ClearAltServiceMappings();
+      rv = gHttpHandler->DoShiftReloadConnectionCleanupWithConnInfo(
+          mConnectionInfo);
+      if (NS_FAILED(rv)) {
+        LOG((
+            "nsHttpChannel::BeginConnect "
+            "DoShiftReloadConnectionCleanupWithConnInfo failed: %08x [this=%p]",
+            static_cast<uint32_t>(rv), this));
+      }
+    }
+  }
+
+  // We may have been cancelled already, either by on-modify-request
+  // listeners or load group observers; in that case, we should not send the
+  // request to the server
+  if (mCanceled) {
+    return mStatus;
+  }
+
+  bool shouldBeClassified = NS_ShouldClassifyChannel(this);
+
+  if (shouldBeClassified) {
+    if (LoadChannelClassifierCancellationPending()) {
+      LOG(
+          ("Waiting for safe-browsing protection cancellation in BeginConnect "
+           "[this=%p]\n",
+           this));
+      return NS_OK;
+    }
+
+    ReEvaluateReferrerAfterTrackingStatusIsKnown();
+  }
+
+  rv = MaybeStartDNSPrefetch();
+  if (NS_FAILED(rv)) {
+    auto dnsStrategy = GetProxyDNSStrategy();
+    if (dnsStrategy & DNS_BLOCK_ON_ORIGIN_RESOLVE) {
+      // TODO: Should this be fatal?
+      return rv;
+    }
+    // Otherwise this shouldn't be fatal.
+    return NS_OK;
+  }
+
+  rv = CallOrWaitForResume(
+      [](nsHttpChannel* self) { return self->PrepareToConnect(); });
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  if (shouldBeClassified) {
+    // Start nsChannelClassifier to catch phishing and malware URIs.
+    RefPtr<nsChannelClassifier> channelClassifier =
+        GetOrCreateChannelClassifier();
+    LOG(("nsHttpChannel::Starting nsChannelClassifier %p [this=%p]",
+         channelClassifier.get(), this));
+    channelClassifier->Start();
+  }
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::MaybeStartDNSPrefetch() {
+  // Start a DNS lookup very early in case the real open is queued the DNS can
+  // happen in parallel. Do not do so in the presence of an HTTP proxy as
+  // all lookups other than for the proxy itself are done by the proxy.
+  // Also we don't do a lookup if the LOAD_NO_NETWORK_IO or
+  // LOAD_ONLY_FROM_CACHE flags are set.
+  //
+  // We keep the DNS prefetch object around so that we can retrieve
+  // timing information from it. There is no guarantee that we actually
+  // use the DNS prefetch data for the real connection, but as we keep
+  // this data around for 3 minutes by default, this should almost always
+  // be correct, and even when it isn't, the timing still represents _a_
+  // valid DNS lookup timing for the site, even if it is not _the_
+  // timing we used.
+  if (mLoadFlags & (LOAD_NO_NETWORK_IO | LOAD_ONLY_FROM_CACHE)) {
+    return NS_OK;
+  }
+
+  auto dnsStrategy = GetProxyDNSStrategy();
+
+  LOG(
+      ("nsHttpChannel::MaybeStartDNSPrefetch [this=%p, strategy=%u] "
+       "prefetching%s\n",
+       this, dnsStrategy,
+       mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : ""));
+
+  if (dnsStrategy & DNS_PREFETCH_ORIGIN) {
+    OriginAttributes originAttributes;
+    StoragePrincipalHelper::GetOriginAttributesForNetworkState(
+        this, originAttributes);
+
+    mDNSPrefetch =
+        new nsDNSPrefetch(mURI, originAttributes, nsIRequest::GetTRRMode(),
+                          this, LoadTimingEnabled());
+    nsIDNSService::DNSFlags dnsFlags = nsIDNSService::RESOLVE_DEFAULT_FLAGS;
+    if (mCaps & NS_HTTP_REFRESH_DNS) {
+      dnsFlags |= nsIDNSService::RESOLVE_BYPASS_CACHE;
+    }
+    nsresult rv = mDNSPrefetch->PrefetchHigh(dnsFlags);
+
+    if (dnsStrategy & DNS_BLOCK_ON_ORIGIN_RESOLVE) {
+      LOG(("  blocking on prefetching origin"));
+
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        LOG(("  lookup failed with 0x%08" PRIx32 ", aborting request",
+             static_cast<uint32_t>(rv)));
+        return rv;
+      }
+
+      // Resolved in OnLookupComplete.
+      mDNSBlockingThenable = mDNSBlockingPromise.Ensure(__func__);
+    }
+
+    if (gHttpHandler->UseHTTPSRRAsAltSvcEnabled() && !mHTTPSSVCRecord &&
+        !(mCaps & NS_HTTP_DISALLOW_HTTPS_RR)) {
+      MOZ_ASSERT(!mHTTPSSVCRecord);
+
+      OriginAttributes originAttributes;
+      StoragePrincipalHelper::GetOriginAttributesForHTTPSRR(this,
+                                                            originAttributes);
+
+      RefPtr<nsDNSPrefetch> resolver =
+          new nsDNSPrefetch(mURI, originAttributes, nsIRequest::GetTRRMode());
+      Unused << resolver->FetchHTTPSSVC(mCaps & NS_HTTP_REFRESH_DNS, true,
+                                        [](nsIDNSHTTPSSVCRecord*) {
+                                          // Do nothing. This is a DNS prefetch.
+                                        });
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetEncodedBodySize(uint64_t* aEncodedBodySize) {
+  if (mCacheEntry && !LoadCacheEntryIsWriteOnly()) {
+    int64_t dataSize = 0;
+    mCacheEntry->GetDataSize(&dataSize);
+    *aEncodedBodySize = dataSize;
+  } else {
+    *aEncodedBodySize = mLogicalOffset;
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIHttpChannelInternal
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetIsAuthChannel(bool* aIsAuthChannel) {
+  *aIsAuthChannel = mIsAuthChannel;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetChannelIsForDownload(bool aChannelIsForDownload) {
+  if (aChannelIsForDownload) {
+    AddClassFlags(nsIClassOfService::Throttleable);
+  } else {
+    ClearClassFlags(nsIClassOfService::Throttleable);
+  }
+
+  return HttpBaseChannel::SetChannelIsForDownload(aChannelIsForDownload);
+}
+
+base::ProcessId nsHttpChannel::ProcessId() {
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(this, parentChannel);
+  if (RefPtr<HttpChannelParent> httpParent = do_QueryObject(parentChannel)) {
+    return httpParent->OtherPid();
+  }
+  if (RefPtr<DocumentLoadListener> docParent = do_QueryObject(parentChannel)) {
+    return docParent->OtherPid();
+  }
+  return base::GetCurrentProcId();
+}
+
+auto nsHttpChannel::AttachStreamFilter() -> RefPtr<ChildEndpointPromise> {
+  LOG(("nsHttpChannel::AttachStreamFilter [this=%p]", this));
+  MOZ_ASSERT(!LoadOnStartRequestCalled());
+
+  if (!ProcessId()) {
+    return ChildEndpointPromise::CreateAndReject(false, __func__);
+  }
+
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(this, parentChannel);
+
+  // If our listener is a DocumentLoadListener, then we might handle
+  // multi-part responses here in the parent process. The current extension
+  // API doesn't understand the parsed multipart format, so we defer responding
+  // here until CallOnStartRequest, and attach the StreamFilter before the
+  // multipart handler (in the parent process!) if applicable.
+  if (RefPtr<DocumentLoadListener> docParent = do_QueryObject(parentChannel)) {
+    StreamFilterRequest* request = mStreamFilterRequests.AppendElement();
+    request->mPromise = new ChildEndpointPromise::Private(__func__);
+    return request->mPromise;
+  }
+
+  mozilla::ipc::Endpoint<extensions::PStreamFilterParent> parent;
+  mozilla::ipc::Endpoint<extensions::PStreamFilterChild> child;
+  nsresult rv = extensions::PStreamFilter::CreateEndpoints(&parent, &child);
+  if (NS_FAILED(rv)) {
+    return ChildEndpointPromise::CreateAndReject(false, __func__);
+  }
+
+  if (RefPtr<HttpChannelParent> httpParent = do_QueryObject(parentChannel)) {
+    return httpParent->AttachStreamFilter(std::move(parent), std::move(child));
+  }
+
+  extensions::StreamFilterParent::Attach(this, std::move(parent));
+  return ChildEndpointPromise::CreateAndResolve(std::move(child), __func__);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetNavigationStartTimeStamp(TimeStamp* aTimeStamp) {
+  LOG(("nsHttpChannel::GetNavigationStartTimeStamp [this=%p]", this));
+  MOZ_ASSERT(aTimeStamp);
+  *aTimeStamp = mNavigationStartTimeStamp;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetNavigationStartTimeStamp(TimeStamp aTimeStamp) {
+  LOG(("nsHttpChannel::SetNavigationStartTimeStamp [this=%p]", this));
+  mNavigationStartTimeStamp = aTimeStamp;
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsISupportsPriority
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::SetPriority(int32_t value) {
+  int16_t newValue = clamped<int32_t>(value, INT16_MIN, INT16_MAX);
+  if (mPriority == newValue) return NS_OK;
+
+  LOG(("nsHttpChannel::SetPriority %p p=%d", this, newValue));
+
+  mPriority = newValue;
+  if (mTransaction) {
+    nsresult rv = gHttpHandler->RescheduleTransaction(mTransaction, mPriority);
+    if (NS_FAILED(rv)) {
+      LOG(
+          ("nsHttpChannel::SetPriority [this=%p] "
+           "RescheduleTransaction failed (%08x)",
+           this, static_cast<uint32_t>(rv)));
+    }
+  }
+
+  // If this channel is the real channel for an e10s channel, notify the
+  // child side about the priority change as well.
+  nsCOMPtr<nsIParentChannel> parentChannel;
+  NS_QueryNotificationCallbacks(this, parentChannel);
+  RefPtr<HttpChannelParent> httpParent = do_QueryObject(parentChannel);
+  if (httpParent) {
+    httpParent->DoSendSetPriority(newValue);
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// HttpChannel::nsIClassOfService
+//-----------------------------------------------------------------------------
+
+void nsHttpChannel::OnClassOfServiceUpdated() {
+  LOG(("nsHttpChannel::OnClassOfServiceUpdated this=%p, cos=%lu, inc=%d", this,
+       mClassOfService.Flags(), mClassOfService.Incremental()));
+
+  if (mTransaction) {
+    gHttpHandler->UpdateClassOfServiceOnTransaction(mTransaction,
+                                                    mClassOfService);
+  }
+  if (EligibleForTailing()) {
+    RemoveAsNonTailRequest();
+  } else {
+    AddAsNonTailRequest();
+  }
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(inFlags);
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::AddClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(inFlags | mClassOfService.Flags());
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ClearClassFlags(uint32_t inFlags) {
+  uint32_t previous = mClassOfService.Flags();
+  mClassOfService.SetFlags(~inFlags & mClassOfService.Flags());
+  if (previous != mClassOfService.Flags()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetClassOfService(ClassOfService cos) {
+  ClassOfService previous = mClassOfService;
+  mClassOfService = cos;
+  if (previous != mClassOfService) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetIncremental(bool incremental) {
+  bool previous = mClassOfService.Incremental();
+  mClassOfService.SetIncremental(incremental);
+  if (previous != mClassOfService.Incremental()) {
+    OnClassOfServiceUpdated();
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIProtocolProxyCallback
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnProxyAvailable(nsICancelable* request, nsIChannel* channel,
+                                nsIProxyInfo* pi, nsresult status) {
+  LOG(("nsHttpChannel::OnProxyAvailable [this=%p pi=%p status=%" PRIx32
+       " mStatus=%" PRIx32 "]\n",
+       this, pi, static_cast<uint32_t>(status),
+       static_cast<uint32_t>(static_cast<nsresult>(mStatus))));
+  mProxyRequest = nullptr;
+
+  nsresult rv;
+
+  // If status is a failure code, then it means that we failed to resolve
+  // proxy info.  That is a non-fatal error assuming it wasn't because the
+  // request was canceled.  We just failover to DIRECT when proxy resolution
+  // fails (failure can mean that the PAC URL could not be loaded).
+
+  if (NS_SUCCEEDED(status)) mProxyInfo = pi;
+
+  if (!gHttpHandler->Active()) {
+    LOG(
+        ("nsHttpChannel::OnProxyAvailable [this=%p] "
+         "Handler no longer active.\n",
+         this));
+    rv = NS_ERROR_NOT_AVAILABLE;
+  } else {
+    rv = BeginConnect();
+  }
+
+  if (NS_FAILED(rv)) {
+    CloseCacheEntry(false);
+    Unused << AsyncAbort(rv);
+  }
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIProxiedChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyInfo(nsIProxyInfo** result) {
+  if (!mConnectionInfo) {
+    *result = do_AddRef(mProxyInfo).take();
+  } else {
+    *result = do_AddRef(mConnectionInfo->ProxyInfo()).take();
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsITimedChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetDomainLookupStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetDomainLookupStart();
+  } else {
+    *_retval = mTransactionTimings.domainLookupStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetDomainLookupEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetDomainLookupEnd();
+  } else {
+    *_retval = mTransactionTimings.domainLookupEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetConnectStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetConnectStart();
+  } else {
+    *_retval = mTransactionTimings.connectStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetTcpConnectEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetTcpConnectEnd();
+  } else {
+    *_retval = mTransactionTimings.tcpConnectEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetSecureConnectionStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetSecureConnectionStart();
+  } else {
+    *_retval = mTransactionTimings.secureConnectionStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetConnectEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetConnectEnd();
+  } else {
+    *_retval = mTransactionTimings.connectEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetRequestStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetRequestStart();
+  } else {
+    *_retval = mTransactionTimings.requestStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetResponseStart(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetResponseStart();
+  } else {
+    *_retval = mTransactionTimings.responseStart;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetResponseEnd(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetResponseEnd();
+  } else {
+    *_retval = mTransactionTimings.responseEnd;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetTransactionPending(TimeStamp* _retval) {
+  if (mTransaction) {
+    *_retval = mTransaction->GetPendingTime();
+  } else {
+    *_retval = mTransactionPendingTime;
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIHttpAuthenticableChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetIsSSL(bool* aIsSSL) {
+  // this attribute is really misnamed - it wants to know if
+  // https:// is being used. SSL might be used to cover http://
+  // in some circumstances (proxies, http/2, etc..)
+  return mURI->SchemeIs("https", aIsSSL);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyMethodIsConnect(bool* aProxyMethodIsConnect) {
+  *aProxyMethodIsConnect = mConnectionInfo->UsingConnect();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetServerResponseHeader(nsACString& value) {
+  if (!mResponseHead) return NS_ERROR_NOT_AVAILABLE;
+  return mResponseHead->GetHeader(nsHttp::Server, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetProxyChallenges(nsACString& value) {
+  if (!mResponseHead) return NS_ERROR_UNEXPECTED;
+  return mResponseHead->GetHeader(nsHttp::Proxy_Authenticate, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetWWWChallenges(nsACString& value) {
+  if (!mResponseHead) return NS_ERROR_UNEXPECTED;
+  return mResponseHead->GetHeader(nsHttp::WWW_Authenticate, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetProxyCredentials(const nsACString& value) {
+  return mRequestHead.SetHeader(nsHttp::Proxy_Authorization, value);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetWWWCredentials(const nsACString& value) {
+  // This method is called when various browser initiated authorization
+  // code sets the credentials.  We need to flag this header as the
+  // "browser default" so it does not show up in the ServiceWorker
+  // FetchEvent.  This may actually get called more than once, though,
+  // so we clear the header first since "default" headers are not
+  // allowed to overwrite normally.
+  Unused << mRequestHead.ClearHeader(nsHttp::Authorization);
+  return mRequestHead.SetHeader(nsHttp::Authorization, value, false,
+                                nsHttpHeaderArray::eVarietyRequestDefault);
+}
+
+//-----------------------------------------------------------------------------
+// Methods that nsIHttpAuthenticableChannel dupes from other IDLs, which we
+// get from HttpBaseChannel, must be explicitly forwarded, because C++ sucks.
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::GetLoadFlags(nsLoadFlags* aLoadFlags) {
+  return HttpBaseChannel::GetLoadFlags(aLoadFlags);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetURI(nsIURI** aURI) { return HttpBaseChannel::GetURI(aURI); }
+
+NS_IMETHODIMP
+nsHttpChannel::GetNotificationCallbacks(nsIInterfaceRequestor** aCallbacks) {
+  return HttpBaseChannel::GetNotificationCallbacks(aCallbacks);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetLoadGroup(nsILoadGroup** aLoadGroup) {
+  return HttpBaseChannel::GetLoadGroup(aLoadGroup);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetRequestMethod(nsACString& aMethod) {
+  return HttpBaseChannel::GetRequestMethod(aMethod);
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIRequestObserver
+//-----------------------------------------------------------------------------
+
+static void RecordOnStartTelemetry(nsresult aStatus,
+                                   HttpTransactionShell* aTransaction,
+                                   bool aIsNavigation) {
+  Telemetry::Accumulate(Telemetry::HTTP_CHANNEL_ONSTART_SUCCESS,
+                        NS_SUCCEEDED(aStatus));
+
+  if (aTransaction) {
+    Telemetry::Accumulate(
+        Telemetry::HTTP3_CHANNEL_ONSTART_SUCCESS,
+        (aTransaction->IsHttp3Used()) ? "http3"_ns : "no_http3"_ns,
+        NS_SUCCEEDED(aStatus));
+  }
+
+  enum class HttpOnStartState : uint32_t {
+    Success = 0,
+    DNSError = 1,
+    Others = 2,
+  };
+
+  if (TRRService::Get() && TRRService::Get()->IsConfirmed()) {
+    // Note this telemetry probe is not working when DNS resolution is done in
+    // the socket process.
+    HttpOnStartState state = HttpOnStartState::Others;
+    if (NS_SUCCEEDED(aStatus)) {
+      state = HttpOnStartState::Success;
+    } else if (aStatus == NS_ERROR_UNKNOWN_HOST ||
+               aStatus == NS_ERROR_UNKNOWN_PROXY_HOST) {
+      state = HttpOnStartState::DNSError;
+    }
+
+    if (aIsNavigation) {
+      Telemetry::Accumulate(Telemetry::HTTP_CHANNEL_PAGE_ONSTART_SUCCESS_TRR3,
+                            TRRService::ProviderKey(),
+                            static_cast<uint32_t>(state));
+    } else {
+      Telemetry::Accumulate(Telemetry::HTTP_CHANNEL_SUB_ONSTART_SUCCESS_TRR3,
+                            TRRService::ProviderKey(),
+                            static_cast<uint32_t>(state));
+    }
+  }
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnStartRequest(nsIRequest* request) {
+  nsresult rv;
+
+  MOZ_ASSERT(LoadRequestObserversCalled());
+
+  AUTO_PROFILER_LABEL("nsHttpChannel::OnStartRequest", NETWORK);
+
+  if (!(mCanceled || NS_FAILED(mStatus)) &&
+      !WRONG_RACING_RESPONSE_SOURCE(request)) {
+    // capture the request's status, so our consumers will know ASAP of any
+    // connection failures, etc - bug 93581
+    nsresult status;
+    request->GetStatus(&status);
+    mStatus = status;
+  }
+
+  if (mStatus == NS_ERROR_NON_LOCAL_CONNECTION_REFUSED) {
+    MOZ_CRASH_UNSAFE(nsPrintfCString("Attempting to connect to non-local "
+                                     "address! opener is [%s], uri is "
+                                     "[%s]",
+                                     mOpenerCallingScriptLocation
+                                         ? mOpenerCallingScriptLocation->get()
+                                         : "unknown",
+                                     mURI->GetSpecOrDefault().get())
+                         .get());
+  }
+
+  LOG(("nsHttpChannel::OnStartRequest [this=%p request=%p status=%" PRIx32
+       "]\n",
+       this, request, static_cast<uint32_t>(static_cast<nsresult>(mStatus))));
+
+  RecordOnStartTelemetry(mStatus, mTransaction, IsNavigation());
+
+  if (mRaceCacheWithNetwork) {
+    LOG(
+        ("  racingNetAndCache - mFirstResponseSource:%d fromCache:%d "
+         "fromNet:%d\n",
+         static_cast<int32_t>(mFirstResponseSource), request == mCachePump,
+         request == mTransactionPump));
+    if (mFirstResponseSource == RESPONSE_PENDING) {
+      // When the cache wins mFirstResponseSource is set to
+      // RESPONSE_FROM_CACHE earlier in ReadFromCache, so this must be a
+      // response from the network.
+      MOZ_ASSERT(request == mTransactionPump);
+      LOG(("  First response from network\n"));
+      {
+        // Race condition with OnCacheEntryCheck, which is not limited
+        // to main thread.
+        mozilla::MutexAutoLock lock(mRCWNLock);
+        mFirstResponseSource = RESPONSE_FROM_NETWORK;
+        mOnStartRequestTimestamp = TimeStamp::Now();
+
+        // Conditional or byte range header could be added in
+        // OnCacheEntryCheck. We need to remove them because the
+        // request might be sent again due to auth retry and we must
+        // not send these headers without having the entry.
+        if (mDidReval) {
+          LOG(("  Removing conditional request headers"));
+          UntieValidationRequest();
+          mDidReval = false;
+        }
+        if (LoadCachedContentIsPartial()) {
+          LOG(("  Removing byte range request headers"));
+          UntieByteRangeRequest();
+          StoreCachedContentIsPartial(false);
+        }
+      }
+      mAvailableCachedAltDataType.Truncate();
+      StoreDeliveringAltData(false);
+    } else if (WRONG_RACING_RESPONSE_SOURCE(request)) {
+      LOG(("  Early return when racing. This response not needed."));
+      return NS_OK;
+    }
+  }
+
+  // Make sure things are what we expect them to be...
+  MOZ_ASSERT(request == mCachePump || request == mTransactionPump,
+             "Unexpected request");
+
+  MOZ_ASSERT(mRaceCacheWithNetwork || !(mTransactionPump && mCachePump) ||
+                 LoadCachedContentIsPartial() || LoadTransactionReplaced(),
+             "If we have both pumps, we're racing cache with network, the cache"
+             " content is partial, or the cache entry was revalidated and "
+             "OnStopRequest was not called yet for the transaction pump.");
+
+  StoreAfterOnStartRequestBegun(true);
+  if (mOnStartRequestTimestamp.IsNull()) {
+    mOnStartRequestTimestamp = TimeStamp::Now();
+  }
+
+  Telemetry::Accumulate(Telemetry::HTTP_ONSTART_SUSPEND_TOTAL_TIME,
+                        mSuspendTotalTime);
+
+  if (mTransaction) {
+    mProxyConnectResponseCode = mTransaction->GetProxyConnectResponseCode();
+    if (request == mTransactionPump) {
+      StoreDataSentToChildProcess(mTransaction->DataSentToChildProcess());
+    }
+
+    if (!mSecurityInfo && !mCachePump) {
+      // grab the security info from the connection object; the transaction
+      // is guaranteed to own a reference to the connection.
+      mSecurityInfo = mTransaction->SecurityInfo();
+    }
+
+    uint32_t stage = mTransaction->HTTPSSVCReceivedStage();
+    if (!LoadHTTPSSVCTelemetryReported() && stage != HTTPSSVC_NOT_USED) {
+      Telemetry::Accumulate(Telemetry::DNS_HTTPSSVC_RECORD_RECEIVING_STAGE,
+                            stage);
+    }
+
+    if (HTTPS_RR_IS_USED(stage)) {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_CHANNEL_ONSTART_SUCCESS_HTTPS_RR,
+          LoadEchConfigUsed() ? "echConfig-used"_ns : "echConfig-not-used"_ns,
+          NS_SUCCEEDED(mStatus));
+      StoreHasHTTPSRR(true);
+    }
+
+    StoreLoadedBySocketProcess(mTransaction->AsHttpTransactionParent() !=
+                               nullptr);
+
+    bool isTrr;
+    bool echConfigUsed;
+    mTransaction->GetNetworkAddresses(mSelfAddr, mPeerAddr, isTrr,
+                                      mEffectiveTRRMode, mTRRSkipReason,
+                                      echConfigUsed);
+  }
+
+  // don't enter this block if we're reading from the cache...
+  if (NS_SUCCEEDED(mStatus) && !mCachePump && mTransaction) {
+    // mTransactionPump doesn't hit OnInputStreamReady and call this until
+    // all of the response headers have been acquired, so we can take
+    // ownership of them from the transaction.
+    mResponseHead = mTransaction->TakeResponseHead();
+    mSupportsHTTP3 = mTransaction->GetSupportsHTTP3();
+    // the response head may be null if the transaction was cancelled.  in
+    // which case we just need to call OnStartRequest/OnStopRequest.
+    if (mResponseHead) return ProcessResponse();
+
+    NS_WARNING("No response head in OnStartRequest");
+  }
+
+  // cache file could be deleted on our behalf, it could contain errors or
+  // it failed to allocate memory, reload from network here.
+  if (mCacheEntry && mCachePump && RECOVER_FROM_CACHE_FILE_ERROR(mStatus)) {
+    LOG(("  cache file error, reloading from server"));
+    mCacheEntry->AsyncDoom(nullptr);
+    rv =
+        StartRedirectChannelToURI(mURI, nsIChannelEventSink::REDIRECT_INTERNAL);
+    if (NS_SUCCEEDED(rv)) return NS_OK;
+  }
+
+  // avoid crashing if mListener happens to be null...
+  if (!mListener) {
+    MOZ_ASSERT_UNREACHABLE("mListener is null");
+    return NS_OK;
+  }
+
+  rv = ProcessCrossOriginSecurityHeaders();
+  if (NS_FAILED(rv)) {
+    mStatus = rv;
+    HandleAsyncAbort();
+    return rv;
+  }
+
+  // No process change is needed, so continue on to ContinueOnStartRequest1.
+  return ContinueOnStartRequest1(rv);
+}
+
+nsresult nsHttpChannel::ContinueOnStartRequest1(nsresult result) {
+  nsresult rv;
+
+  // if process selection failed, cancel this load.
+  if (NS_FAILED(result) && !mCanceled) {
+    Cancel(result);
+    return CallOnStartRequest();
+  }
+
+  // before we start any content load, check for redirectTo being called
+  // this code is executed mainly before we start load from the cache
+  if (mAPIRedirectToURI && !mCanceled) {
+    nsAutoCString redirectToSpec;
+    mAPIRedirectToURI->GetAsciiSpec(redirectToSpec);
+    LOG(("  redirectTo called with uri=%s", redirectToSpec.BeginReading()));
+
+    MOZ_ASSERT(!LoadOnStartRequestCalled());
+
+    nsCOMPtr<nsIURI> redirectTo;
+    mAPIRedirectToURI.swap(redirectTo);
+
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest2);
+    rv = StartRedirectChannelToURI(redirectTo,
+                                   nsIChannelEventSink::REDIRECT_TEMPORARY);
+    if (NS_SUCCEEDED(rv)) {
+      return NS_OK;
+    }
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest2);
+  }
+
+  // Hack: ContinueOnStartRequest2 uses NS_OK to detect successful redirects,
+  // so we distinguish this codepath (a non-redirect that's processing
+  // normally) by passing in a bogus error code.
+  return ContinueOnStartRequest2(NS_BINDING_FAILED);
+}
+
+nsresult nsHttpChannel::ContinueOnStartRequest2(nsresult result) {
+  if (NS_SUCCEEDED(result)) {
+    // Redirect has passed through, we don't want to go on with this
+    // channel.  It will now be canceled by the redirect handling code
+    // that called this function.
+    return NS_OK;
+  }
+
+  // on proxy errors, try to failover
+  if (mConnectionInfo->ProxyInfo() &&
+      (mStatus == NS_ERROR_PROXY_CONNECTION_REFUSED ||
+       mStatus == NS_ERROR_UNKNOWN_PROXY_HOST ||
+       mStatus == NS_ERROR_NET_TIMEOUT || mStatus == NS_ERROR_NET_RESET)) {
+    PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
+    if (NS_SUCCEEDED(ProxyFailover())) {
+      mProxyConnectResponseCode = 0;
+      return NS_OK;
+    }
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
+  }
+
+  // Hack: ContinueOnStartRequest3 uses NS_OK to detect successful redirects,
+  // so we distinguish this codepath (a non-redirect that's processing
+  // normally) by passing in a bogus error code.
+  return ContinueOnStartRequest3(NS_BINDING_FAILED);
+}
+
+nsresult nsHttpChannel::ContinueOnStartRequest3(nsresult result) {
+  if (NS_SUCCEEDED(result)) {
+    // Redirect has passed through, we don't want to go on with this
+    // channel.  It will now be canceled by the redirect handling code
+    // that called this function.
+    return NS_OK;
+  }
+
+  return ContinueOnStartRequest4(NS_OK);
+}
+
+nsresult nsHttpChannel::ContinueOnStartRequest4(nsresult result) {
+  LOG(("nsHttpChannel::ContinueOnStartRequest4 [this=%p]", this));
+
+  if (NS_SUCCEEDED(mStatus) && mResponseHead && mAuthProvider) {
+    uint32_t httpStatus = mResponseHead->Status();
+    if (httpStatus != 401 && httpStatus != 407) {
+      nsresult rv = mAuthProvider->CheckForSuperfluousAuth();
+      if (NS_FAILED(rv)) {
+        LOG(("  CheckForSuperfluousAuth failed (%08x)",
+             static_cast<uint32_t>(rv)));
+      }
+    }
+  }
+
+  return CallOnStartRequest();
+}
+
+static void ReportHTTPSRRTelemetry(
+    const Maybe<nsCOMPtr<nsIDNSHTTPSSVCRecord>>& aMaybeRecord) {
+  bool hasHTTPSRR = aMaybeRecord && (aMaybeRecord.ref() != nullptr);
+  Telemetry::Accumulate(Telemetry::HTTPS_RR_PRESENTED, hasHTTPSRR);
+  if (!hasHTTPSRR) {
+    return;
+  }
+
+  const nsCOMPtr<nsIDNSHTTPSSVCRecord>& record = aMaybeRecord.ref();
+  nsCOMPtr<nsISVCBRecord> svcbRecord;
+  if (NS_SUCCEEDED(record->GetServiceModeRecord(false, false,
+                                                getter_AddRefs(svcbRecord)))) {
+    MOZ_ASSERT(svcbRecord);
+
+    Maybe<std::tuple<nsCString, SupportedAlpnRank>> alpn =
+        svcbRecord->GetAlpn();
+    bool isHttp3 = alpn ? IsHttp3(std::get<1>(*alpn)) : false;
+    Telemetry::Accumulate(Telemetry::HTTPS_RR_WITH_HTTP3_PRESENTED, isHttp3);
+  }
+}
+
+static nsLiteralCString ContentTypeToTelemetryLabel(nsHttpChannel* aChannel) {
+  nsAutoCString contentType;
+  aChannel->GetContentType(contentType);
+
+  if (StringBeginsWith(contentType, "text/"_ns)) {
+    if (contentType.EqualsLiteral(TEXT_HTML)) {
+      return "text_html"_ns;
+    }
+    if (contentType.EqualsLiteral(TEXT_CSS)) {
+      return "text_css"_ns;
+    }
+    if (contentType.EqualsLiteral(TEXT_JSON)) {
+      return "text_json"_ns;
+    }
+    if (contentType.EqualsLiteral(TEXT_PLAIN)) {
+      return "text_plain"_ns;
+    }
+    if (contentType.EqualsLiteral(TEXT_JAVASCRIPT)) {
+      return "text_javascript"_ns;
+    }
+    return "text_other"_ns;
+  }
+
+  if (StringBeginsWith(contentType, "audio/"_ns)) {
+    return "audio"_ns;
+  }
+
+  if (StringBeginsWith(contentType, "video/"_ns)) {
+    return "video"_ns;
+  }
+
+  if (StringBeginsWith(contentType, "multipart/"_ns)) {
+    return "multipart"_ns;
+  }
+
+  if (StringBeginsWith(contentType, "image/"_ns)) {
+    if (contentType.EqualsLiteral(IMAGE_ICO) ||
+        contentType.EqualsLiteral(IMAGE_ICO_MS) ||
+        contentType.EqualsLiteral(IMAGE_ICON_MS)) {
+      return "icon"_ns;
+    }
+    return "image"_ns;
+  }
+
+  if (StringBeginsWith(contentType, "application/"_ns)) {
+    if (contentType.EqualsLiteral(APPLICATION_JSON)) {
+      return "text_json"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_OGG)) {
+      return "video"_ns;
+    }
+    if (contentType.EqualsLiteral("application/ocsp-response")) {
+      return "ocsp"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_XPINSTALL)) {
+      return "xpinstall"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_WASM)) {
+      return "wasm"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_PDF) ||
+        contentType.EqualsLiteral(APPLICATION_POSTSCRIPT)) {
+      return "pdf"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_OCTET_STREAM)) {
+      return "octet_stream"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
+        contentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
+        contentType.EqualsLiteral(APPLICATION_XJAVASCRIPT)) {
+      return "text_javascript"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_NS_PROXY_AUTOCONFIG) ||
+        contentType.EqualsLiteral(APPLICATION_NS_JAVASCRIPT_AUTOCONFIG)) {
+      return "proxy"_ns;
+    }
+    if (contentType.EqualsLiteral(APPLICATION_BROTLI) ||
+        contentType.Find("zip") != kNotFound ||
+        contentType.Find("compress") != kNotFound) {
+      return "compressed"_ns;
+    }
+    if (contentType.Find("x509") != kNotFound) {
+      return "x509"_ns;
+    }
+    return "application_other"_ns;
+  }
+
+  if (contentType.EqualsLiteral(BINARY_OCTET_STREAM)) {
+    return "octet_stream"_ns;
+  }
+
+  return "other"_ns;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnStopRequest(nsIRequest* request, nsresult status) {
+  AUTO_PROFILER_LABEL("nsHttpChannel::OnStopRequest", NETWORK);
+
+  LOG(("nsHttpChannel::OnStopRequest [this=%p request=%p status=%" PRIx32 "]\n",
+       this, request, static_cast<uint32_t>(status)));
+
+  LOG(("OnStopRequest %p requestFromCache: %d mFirstResponseSource: %d\n", this,
+       request == mCachePump, static_cast<int32_t>(mFirstResponseSource)));
+
+  MOZ_ASSERT(NS_IsMainThread(),
+             "OnStopRequest should only be called from the main thread");
+
+  if (WRONG_RACING_RESPONSE_SOURCE(request)) {
+    return NS_OK;
+  }
+
+  // It's possible that LoadUseHTTPSSVC() is false, but we already have
+  // mHTTPSSVCRecord.
+  if (LoadUseHTTPSSVC() || mHTTPSSVCRecord) {
+    ReportHTTPSRRTelemetry(mHTTPSSVCRecord);
+  }
+
+  // If this load failed because of a security error, it may be because we
+  // are in a captive portal - trigger an async check to make sure.
+  int32_t nsprError = -1 * NS_ERROR_GET_CODE(status);
+  if (mozilla::psm::IsNSSErrorCode(nsprError) && IsHTTPS()) {
+    gIOService->RecheckCaptivePortal();
+  }
+
+  if (LoadTimingEnabled() && request == mCachePump) {
+    mCacheReadEnd = TimeStamp::Now();
+
+    ReportNetVSCacheTelemetry();
+  }
+
+  // allow content to be cached if it was loaded successfully (bug #482935)
+  bool contentComplete = NS_SUCCEEDED(status);
+
+  // honor the cancelation status even if the underlying transaction
+  // completed.
+  if (mCanceled || NS_FAILED(mStatus)) status = mStatus;
+
+  if (LoadCachedContentIsPartial()) {
+    if (NS_SUCCEEDED(status)) {
+      // mTransactionPump should be suspended
+      MOZ_ASSERT(request != mTransactionPump,
+                 "byte-range transaction finished prematurely");
+
+      if (request == mCachePump) {
+        bool streamDone;
+        status = OnDoneReadingPartialCacheEntry(&streamDone);
+        if (NS_SUCCEEDED(status) && !streamDone) return status;
+        // otherwise, fall through and fire OnStopRequest...
+      } else if (request == mTransactionPump) {
+        MOZ_ASSERT(LoadConcurrentCacheAccess());
+      } else {
+        MOZ_ASSERT_UNREACHABLE("unexpected request");
+      }
+    }
+    // Do not to leave the transaction in a suspended state in error cases.
+    if (NS_FAILED(status) && mTransaction) {
+      nsresult rv = gHttpHandler->CancelTransaction(mTransaction, status);
+      if (NS_FAILED(rv)) {
+        LOG(("  CancelTransaction failed (%08x)", static_cast<uint32_t>(rv)));
+      }
+    }
+  }
+
+  nsCOMPtr<nsICompressConvStats> conv = do_QueryInterface(mCompressListener);
+  if (conv) {
+    conv->GetDecodedDataLength(&mDecodedBodySize);
+  }
+
+  bool isFromNet = request == mTransactionPump;
+
+  if (mTransaction) {
+    // determine if we should call DoAuthRetry
+    bool authRetry = mAuthRetryPending && NS_SUCCEEDED(status);
+    StoreStronglyFramed(mTransaction->ResponseIsComplete());
+    LOG(("nsHttpChannel %p has a strongly framed transaction: %d", this,
+         LoadStronglyFramed()));
+
+    // Save the reference of |mTransaction| to |transactionWithStickyConn|
+    // when it has a sticky connection.
+    // In the case we need to retry an authentication request, we need to
+    // reuse the connection of |transactionWithStickyConn|.
+    RefPtr<HttpTransactionShell> transactionWithStickyConn;
+    if (mCaps & NS_HTTP_STICKY_CONNECTION ||
+        mTransaction->HasStickyConnection()) {
+      transactionWithStickyConn = mTransaction;
+      // Make sure we use the updated caps and connection info from transaction.
+      // We read these values when the transaction is already closed, so there
+      // should be no race.
+      if (mTransaction->Http2Disabled()) {
+        mCaps |= NS_HTTP_DISALLOW_SPDY;
+      }
+      if (mTransaction->Http3Disabled()) {
+        mCaps |= NS_HTTP_DISALLOW_HTTP3;
+      }
+      mConnectionInfo = mTransaction->GetConnInfo();
+      LOG(("  transaction %p has sticky connection",
+           transactionWithStickyConn.get()));
+    }
+
+    // this code relies on the code in nsHttpTransaction::Close, which
+    // tests for NS_HTTP_STICKY_CONNECTION to determine whether or not to
+    // keep the connection around after the transaction is finished.
+    //
+    LOG(("  mAuthRetryPending=%d, status=%" PRIx32 ", sticky conn cap=%d",
+         static_cast<bool>(mAuthRetryPending), static_cast<uint32_t>(status),
+         mCaps & NS_HTTP_STICKY_CONNECTION));
+    // We must check caps for stickinness also on the transaction because it
+    // might have been updated by the transaction itself during inspection of
+    // the reposnse headers yet on the socket thread (found connection based
+    // auth schema).
+
+    if ((mAuthRetryPending || NS_FAILED(status)) && transactionWithStickyConn) {
+      if (NS_FAILED(status)) {
+        // Close (don't reuse) the sticky connection if it's in the middle
+        // of an NTLM negotiation and this channel has been cancelled.
+        // There are proxy servers known to get confused when we send
+        // a new request over such a half-stated connection.
+        if (!LoadAuthConnectionRestartable()) {
+          LOG(("  not reusing a half-authenticated sticky connection"));
+          transactionWithStickyConn->DontReuseConnection();
+        }
+      }
+    }
+
+    if (mCaps & NS_HTTP_STICKY_CONNECTION) {
+      mTransaction->SetH2WSConnRefTaken();
+    }
+
+    mTransferSize = mTransaction->GetTransferSize();
+    mRequestSize = mTransaction->GetRequestSize();
+
+    // Make sure the size does not overflow.
+    int32_t totalSize = static_cast<int32_t>(
+        std::clamp<uint64_t>(mRequestSize + mTransferSize, 0LU,
+                             std::numeric_limits<int32_t>::max()));
+
+    // Record telemetry for transferred size keyed by contentType
+    nsLiteralCString label = ContentTypeToTelemetryLabel(this);
+    if (mPrivateBrowsing) {
+      mozilla::glean::network::data_size_pb_per_type.Get(label).Add(totalSize);
+    } else {
+      mozilla::glean::network::data_size_per_type.Get(label).Add(totalSize);
+    }
+
+    // If we are using the transaction to serve content, we also save the
+    // time since async open in the cache entry so we can compare telemetry
+    // between cache and net response.
+    // Do not store the time of conditional requests because even if we
+    // fetch the data from the server, the time includes loading of the old
+    // cache entry which would skew the network load time.
+    if (request == mTransactionPump && mCacheEntry && !mDidReval &&
+        !LoadCustomConditionalRequest() && !mAsyncOpenTime.IsNull() &&
+        !mOnStartRequestTimestamp.IsNull()) {
+      uint64_t onStartTime =
+          (mOnStartRequestTimestamp - mAsyncOpenTime).ToMilliseconds();
+      uint64_t onStopTime =
+          (TimeStamp::Now() - mAsyncOpenTime).ToMilliseconds();
+      Unused << mCacheEntry->SetNetworkTimes(onStartTime, onStopTime);
+    }
+
+    mResponseTrailers = mTransaction->TakeResponseTrailers();
+
+    // at this point, we're done with the transaction
+    mTransactionTimings = mTransaction->Timings();
+    mTransactionPendingTime = mTransaction->GetPendingTime();
+    mTransaction = nullptr;
+    mTransactionPump = nullptr;
+
+    // We no longer need the dns prefetch object
+    if (mDNSPrefetch && mDNSPrefetch->TimingsValid() &&
+        !mTransactionTimings.requestStart.IsNull() &&
+        !mTransactionTimings.connectStart.IsNull() &&
+        mDNSPrefetch->EndTimestamp() <= mTransactionTimings.connectStart) {
+      // We only need the domainLookup timestamps when not using a
+      // persistent connection, meaning if the endTimestamp < connectStart
+      mTransactionTimings.domainLookupStart = mDNSPrefetch->StartTimestamp();
+      mTransactionTimings.domainLookupEnd = mDNSPrefetch->EndTimestamp();
+    }
+    mDNSPrefetch = nullptr;
+
+    // handle auth retry...
+    if (authRetry) {
+      mAuthRetryPending = false;
+      auto continueOSR = [authRetry, isFromNet, contentComplete,
+                          transactionWithStickyConn](auto* self,
+                                                     nsresult aStatus) {
+        return self->ContinueOnStopRequestAfterAuthRetry(
+            aStatus, authRetry, isFromNet, contentComplete,
+            transactionWithStickyConn);
+      };
+      status = DoAuthRetry(transactionWithStickyConn, continueOSR);
+      if (NS_SUCCEEDED(status)) {
+        return NS_OK;
+      }
+    }
+    return ContinueOnStopRequestAfterAuthRetry(status, authRetry, isFromNet,
+                                               contentComplete,
+                                               transactionWithStickyConn);
+  }
+
+  return ContinueOnStopRequest(status, isFromNet, contentComplete);
+}
+
+nsresult nsHttpChannel::ContinueOnStopRequestAfterAuthRetry(
+    nsresult aStatus, bool aAuthRetry, bool aIsFromNet, bool aContentComplete,
+    HttpTransactionShell* aTransWithStickyConn) {
+  LOG(
+      ("nsHttpChannel::ContinueOnStopRequestAfterAuthRetry "
+       "[this=%p, aStatus=%" PRIx32
+       " aAuthRetry=%d, aIsFromNet=%d, aTransWithStickyConn=%p]\n",
+       this, static_cast<uint32_t>(aStatus), aAuthRetry, aIsFromNet,
+       aTransWithStickyConn));
+
+  if (aAuthRetry && NS_SUCCEEDED(aStatus)) {
+    return NS_OK;
+  }
+
+  // If DoAuthRetry failed, or if we have been cancelled since showing
+  // the auth. dialog, then we need to send OnStartRequest now
+  if (aAuthRetry || (mAuthRetryPending && NS_FAILED(aStatus))) {
+    MOZ_ASSERT(NS_FAILED(aStatus), "should have a failure code here");
+    // NOTE: since we have a failure status, we can ignore the return
+    // value from onStartRequest.
+    LOG(("  calling mListener->OnStartRequest [this=%p, listener=%p]\n", this,
+         mListener.get()));
+    if (mListener) {
+      MOZ_ASSERT(!LoadOnStartRequestCalled(),
+                 "We should not call OnStartRequest twice.");
+      nsCOMPtr<nsIStreamListener> listener(mListener);
+      StoreOnStartRequestCalled(true);
+      listener->OnStartRequest(this);
+    } else {
+      StoreOnStartRequestCalled(true);
+      NS_WARNING("OnStartRequest skipped because of null listener");
+    }
+  }
+
+  // if this transaction has been replaced, then bail.
+  if (LoadTransactionReplaced()) {
+    LOG(("Transaction replaced\n"));
+    // This was just the network check for a 304 response.
+    mFirstResponseSource = RESPONSE_PENDING;
+    return NS_OK;
+  }
+
+  bool upgradeWebsocket = mUpgradeProtocolCallback && aTransWithStickyConn &&
+                          mResponseHead &&
+                          ((mResponseHead->Status() == 101 &&
+                            mResponseHead->Version() == HttpVersion::v1_1) ||
+                           (mResponseHead->Status() == 200 &&
+                            mResponseHead->Version() == HttpVersion::v2_0));
+
+  bool upgradeConnect = mUpgradeProtocolCallback && aTransWithStickyConn &&
+                        (mCaps & NS_HTTP_CONNECT_ONLY) && mResponseHead &&
+                        mResponseHead->Status() == 200;
+
+  if (upgradeWebsocket || upgradeConnect) {
+    if (nsIOService::UseSocketProcess() && upgradeConnect) {
+      // TODO: Support connection upgrade for socket process in bug 1632809.
+      Unused << mUpgradeProtocolCallback->OnUpgradeFailed(
+          NS_ERROR_NOT_IMPLEMENTED);
+      return ContinueOnStopRequest(aStatus, aIsFromNet, aContentComplete);
+    }
+
+    nsresult rv = gHttpHandler->CompleteUpgrade(aTransWithStickyConn,
+                                                mUpgradeProtocolCallback);
+    if (NS_FAILED(rv)) {
+      LOG(("  CompleteUpgrade failed with %" PRIx32,
+           static_cast<uint32_t>(rv)));
+
+      // This ensures that WebSocketChannel::OnStopRequest will be
+      // called with an error so the session is properly aborted.
+      aStatus = rv;
+    }
+  }
+
+  return ContinueOnStopRequest(aStatus, aIsFromNet, aContentComplete);
+}
+
+nsresult nsHttpChannel::ContinueOnStopRequest(nsresult aStatus, bool aIsFromNet,
+                                              bool aContentComplete) {
+  LOG(
+      ("nsHttpChannel::ContinueOnStopRequest "
+       "[this=%p aStatus=%" PRIx32 ", aIsFromNet=%d]\n",
+       this, static_cast<uint32_t>(aStatus), aIsFromNet));
+
+  // HTTP_CHANNEL_DISPOSITION TELEMETRY
+  enum ChannelDisposition {
+    kHttpCanceled = 0,
+    kHttpDisk = 1,
+    kHttpNetOK = 2,
+    kHttpNetEarlyFail = 3,
+    kHttpNetLateFail = 4,
+    kHttpsCanceled = 8,
+    kHttpsDisk = 9,
+    kHttpsNetOK = 10,
+    kHttpsNetEarlyFail = 11,
+    kHttpsNetLateFail = 12
+  } chanDisposition = kHttpCanceled;
+  // HTTP_CHANNEL_DISPOSITION_UPGRADE TELEMETRY
+  Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE upgradeChanDisposition =
+      Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::cancel;
+
+  // HTTP 0.9 is more likely to be an error than really 0.9, so count it that
+  // way
+  if (mCanceled) {
+    chanDisposition = kHttpCanceled;
+    upgradeChanDisposition =
+        Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::cancel;
+  } else if (!LoadUsedNetwork() ||
+             (mRaceCacheWithNetwork &&
+              mFirstResponseSource == RESPONSE_FROM_CACHE)) {
+    chanDisposition = kHttpDisk;
+    upgradeChanDisposition =
+        Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::disk;
+  } else if (NS_SUCCEEDED(aStatus) && mResponseHead &&
+             mResponseHead->Version() != HttpVersion::v0_9) {
+    chanDisposition = kHttpNetOK;
+    upgradeChanDisposition =
+        Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::netOk;
+  } else if (!mTransferSize) {
+    chanDisposition = kHttpNetEarlyFail;
+    upgradeChanDisposition =
+        Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::netEarlyFail;
+  } else {
+    chanDisposition = kHttpNetLateFail;
+    upgradeChanDisposition =
+        Telemetry::LABELS_HTTP_CHANNEL_DISPOSITION_UPGRADE::netLateFail;
+  }
+  // Browser upgrading only happens on HTTPS pages for mixed passive content
+  // when upgrading is enabled.
+  nsCString upgradeKey;
+  if (IsHTTPS()) {
+    // Browser upgrading is disabled and the content is already HTTPS
+    upgradeKey = "disabledNoReason"_ns;
+    // Checks "security.mixed_content.upgrade_display_content" is true
+    if (StaticPrefs::security_mixed_content_upgrade_display_content()) {
+      if (mLoadInfo->GetBrowserUpgradeInsecureRequests()) {
+        // HTTP content the browser has upgraded to HTTPS
+        upgradeKey = "enabledUpgrade"_ns;
+      } else {
+        // Content wasn't upgraded but is already HTTPS
+        upgradeKey = "enabledNoReason"_ns;
+      }
+    }
+    // shift http to https disposition enums
+    chanDisposition =
+        static_cast<ChannelDisposition>(chanDisposition + kHttpsCanceled);
+  } else if (mLoadInfo->GetBrowserWouldUpgradeInsecureRequests()) {
+    // HTTP content the browser would upgrade to HTTPS if upgrading was
+    // enabled
+    upgradeKey = "disabledUpgrade"_ns;
+  } else {
+    // HTTP content that wouldn't upgrade
+    upgradeKey = StaticPrefs::security_mixed_content_upgrade_display_content()
+                     ? "enabledWont"_ns
+                     : "disabledWont"_ns;
+  }
+  Telemetry::AccumulateCategoricalKeyed(upgradeKey, upgradeChanDisposition);
+  LOG(("  nsHttpChannel::OnStopRequest ChannelDisposition %d\n",
+       chanDisposition));
+  Telemetry::Accumulate(Telemetry::HTTP_CHANNEL_DISPOSITION, chanDisposition);
+
+  // Collect specific telemetry for measuring image, video, audio
+  // success/failure rates in regular browsing mode and when auto upgrading of
+  // subresources is enabled. Note that we only evaluate actual image types, not
+  // favicons.
+  nsContentPolicyType internalLoadType;
+  mLoadInfo->GetInternalContentPolicyType(&internalLoadType);
+  bool statusIsSuccess = NS_SUCCEEDED(aStatus);
+  if (internalLoadType == nsIContentPolicy::TYPE_INTERNAL_IMAGE ||
+      internalLoadType == nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD) {
+    if (mLoadInfo->GetBrowserDidUpgradeInsecureRequests()) {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_IMAGES::ImgUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_IMAGES::ImgUpFailure);
+    } else {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_IMAGES::ImgNoUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_IMAGES::ImgNoUpFailure);
+    }
+  }
+  if (internalLoadType == nsIContentPolicy::TYPE_INTERNAL_VIDEO) {
+    if (mLoadInfo->GetBrowserDidUpgradeInsecureRequests()) {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_VIDEO::VideoUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_VIDEO::VideoUpFailure);
+    } else {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_VIDEO::VideoNoUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_VIDEO::VideoNoUpFailure);
+    }
+  }
+  if (internalLoadType == nsIContentPolicy::TYPE_INTERNAL_AUDIO) {
+    if (mLoadInfo->GetBrowserDidUpgradeInsecureRequests()) {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_AUDIO::AudioUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_AUDIO::AudioUpFailure);
+    } else {
+      Telemetry::AccumulateCategorical(
+          statusIsSuccess
+              ? Telemetry::LABELS_MIXED_CONTENT_AUDIO::AudioNoUpSuccess
+              : Telemetry::LABELS_MIXED_CONTENT_AUDIO::AudioNoUpFailure);
+    }
+  }
+
+  // if needed, check cache entry has all data we expect
+  if (mCacheEntry && mCachePump && LoadConcurrentCacheAccess() &&
+      aContentComplete) {
+    int64_t size, contentLength;
+    nsresult rv = CheckPartial(mCacheEntry, &size, &contentLength);
+    if (NS_SUCCEEDED(rv)) {
+      if (size == int64_t(-1)) {
+        // mayhemer TODO - we have to restart read from cache here at the size
+        // offset
+        MOZ_ASSERT(false);
+        LOG(
+            ("  cache entry write is still in progress, but we just "
+             "finished reading the cache entry"));
+      } else if (contentLength != int64_t(-1) && contentLength != size) {
+        LOG(("  concurrent cache entry write has been interrupted"));
+        mCachedResponseHead = std::move(mResponseHead);
+        // Ignore zero partial length because we also want to resume when
+        // no data at all has been read from the cache.
+        rv = MaybeSetupByteRangeRequest(size, contentLength, true);
+        if (NS_SUCCEEDED(rv) && LoadIsPartialRequest()) {
+          // Prevent read from cache again
+          mCachedContentIsValid = false;
+          StoreCachedContentIsPartial(1);
+
+          // We are about to perform a different network request.
+          // We must set mRaceCacheWithNetwork to false because otherwise
+          // we would ignore the network response thinking we didn't need it.
+          mRaceCacheWithNetwork = false;
+
+          // Perform the range request
+          rv = ContinueConnect();
+          if (NS_SUCCEEDED(rv)) {
+            LOG(("  performing range request"));
+            mCachePump = nullptr;
+            return NS_OK;
+          }
+          LOG(("  but range request perform failed 0x%08" PRIx32,
+               static_cast<uint32_t>(rv)));
+          aStatus = NS_ERROR_NET_INTERRUPT;
+        } else {
+          LOG(("  but range request setup failed rv=0x%08" PRIx32
+               ", failing load",
+               static_cast<uint32_t>(rv)));
+        }
+      }
+    }
+  }
+
+  StoreIsPending(false);
+  mStatus = aStatus;
+
+  // perform any final cache operations before we close the cache entry.
+  if (mCacheEntry && LoadRequestTimeInitialized()) {
+    bool writeAccess;
+    // New implementation just returns value of the !LoadCacheEntryIsReadOnly()
+    // flag passed in. Old implementation checks on nsICache::ACCESS_WRITE
+    // flag.
+    mCacheEntry->HasWriteAccess(!LoadCacheEntryIsReadOnly(), &writeAccess);
+    if (writeAccess) {
+      nsresult rv = FinalizeCacheEntry();
+      if (NS_FAILED(rv)) {
+        LOG(("FinalizeCacheEntry failed (%08x)", static_cast<uint32_t>(rv)));
+      }
+    }
+  }
+
+  ReportRcwnStats(aIsFromNet);
+
+  // Register entry to the PerformanceStorage resource timing
+  MaybeReportTimingData();
+
+  MaybeFlushConsoleReports();
+
+  if (!mEndMarkerAdded && profiler_thread_is_being_profiled_for_markers()) {
+    // These do allocations/frees/etc; avoid if not active
+    mEndMarkerAdded = true;
+
+    nsAutoCString requestMethod;
+    GetRequestMethod(requestMethod);
+
+    int32_t priority = PRIORITY_NORMAL;
+    GetPriority(&priority);
+
+    uint64_t size = 0;
+    GetEncodedBodySize(&size);
+
+    nsAutoCString contentType;
+    if (mResponseHead) {
+      mResponseHead->ContentType(contentType);
+    }
+    profiler_add_network_marker(
+        mURI, requestMethod, priority, mChannelId, NetworkLoadType::LOAD_STOP,
+        mLastStatusReported, TimeStamp::Now(), size, mCacheDisposition,
+        mLoadInfo->GetInnerWindowID(),
+        mLoadInfo->GetOriginAttributes().mPrivateBrowsingId > 0,
+        &mTransactionTimings, std::move(mSource),
+        Some(nsDependentCString(contentType.get())));
+  }
+
+  if (mListener) {
+    LOG(("nsHttpChannel %p calling OnStopRequest\n", this));
+    MOZ_ASSERT(LoadOnStartRequestCalled(),
+               "OnStartRequest should be called before OnStopRequest");
+    MOZ_ASSERT(!LoadOnStopRequestCalled(),
+               "We should not call OnStopRequest twice");
+    StoreOnStopRequestCalled(true);
+    mListener->OnStopRequest(this, aStatus);
+  }
+  StoreOnStopRequestCalled(true);
+
+  // The prefetch needs to be released on the main thread
+  mDNSPrefetch = nullptr;
+
+  // notify "http-on-stop-connect" observers
+  gHttpHandler->OnStopRequest(this);
+
+  RemoveAsNonTailRequest();
+
+  if (mChannelBlockedByOpaqueResponse && mCachedOpaqueResponseBlockingPref) {
+    mResponseHead->ClearHeaders();
+  }
+  // If a preferred alt-data type was set, this signals the consumer is
+  // interested in reading and/or writing the alt-data representation.
+  // We need to hold a reference to the cache entry in case the listener calls
+  // openAlternativeOutputStream() after CloseCacheEntry() clears mCacheEntry.
+  if (!mPreferredCachedAltDataTypes.IsEmpty()) {
+    mAltDataCacheEntry = mCacheEntry;
+  }
+
+  CloseCacheEntry(!aContentComplete);
+
+  if (mLoadGroup) {
+    mLoadGroup->RemoveRequest(this, nullptr, aStatus);
+  }
+
+  // We don't need this info anymore
+  CleanRedirectCacheChainIfNecessary();
+
+  ReleaseListeners();
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIStreamListener
+//-----------------------------------------------------------------------------
+
+class OnTransportStatusAsyncEvent : public Runnable {
+ public:
+  OnTransportStatusAsyncEvent(nsITransportEventSink* aEventSink,
+                              nsresult aTransportStatus, int64_t aProgress,
+                              int64_t aProgressMax)
+      : Runnable("net::OnTransportStatusAsyncEvent"),
+        mEventSink(aEventSink),
+        mTransportStatus(aTransportStatus),
+        mProgress(aProgress),
+        mProgressMax(aProgressMax) {
+    MOZ_ASSERT(!NS_IsMainThread(), "Shouldn't be created on main thread");
+  }
+
+  NS_IMETHOD Run() override {
+    MOZ_ASSERT(NS_IsMainThread(), "Should run on main thread");
+    if (mEventSink) {
+      mEventSink->OnTransportStatus(nullptr, mTransportStatus, mProgress,
+                                    mProgressMax);
+    }
+    return NS_OK;
+  }
+
+ private:
+  nsCOMPtr<nsITransportEventSink> mEventSink;
+  nsresult mTransportStatus;
+  int64_t mProgress;
+  int64_t mProgressMax;
+};
+
+NS_IMETHODIMP
+nsHttpChannel::OnDataAvailable(nsIRequest* request, nsIInputStream* input,
+                               uint64_t offset, uint32_t count) {
+  nsresult rv;
+  AUTO_PROFILER_LABEL("nsHttpChannel::OnDataAvailable", NETWORK);
+
+  LOG(("nsHttpChannel::OnDataAvailable [this=%p request=%p offset=%" PRIu64
+       " count=%" PRIu32 "]\n",
+       this, request, offset, count));
+
+  LOG(("  requestFromCache: %d mFirstResponseSource: %d\n",
+       request == mCachePump, static_cast<int32_t>(mFirstResponseSource)));
+
+  // don't send out OnDataAvailable notifications if we've been canceled.
+  if (mCanceled) return mStatus;
+
+  if (mAuthRetryPending || WRONG_RACING_RESPONSE_SOURCE(request) ||
+      (request == mTransactionPump && LoadTransactionReplaced())) {
+    uint32_t n;
+    return input->ReadSegments(NS_DiscardSegment, nullptr, count, &n);
+  }
+
+  MOZ_ASSERT(mResponseHead, "No response head in ODA!!");
+
+  MOZ_ASSERT(!(LoadCachedContentIsPartial() && (request == mTransactionPump)),
+             "transaction pump not suspended");
+
+  mIsReadingFromCache = (request == mCachePump);
+
+  if (mListener) {
+    //
+    // synthesize transport progress event.  we do this here since we want
+    // to delay OnProgress events until we start streaming data.  this is
+    // crucially important since it impacts the lock icon (see bug 240053).
+    //
+    nsresult transportStatus;
+    if (request == mCachePump) {
+      transportStatus = NS_NET_STATUS_READING;
+    } else {
+      transportStatus = NS_NET_STATUS_RECEIVING_FROM;
+    }
+
+    // mResponseHead may reference new or cached headers, but either way it
+    // holds our best estimate of the total content length.  Even in the case
+    // of a byte range request, the content length stored in the cached
+    // response headers is what we want to use here.
+
+    int64_t progressMax = -1;
+    rv = GetContentLength(&progressMax);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("GetContentLength failed");
+    }
+    int64_t progress = mLogicalOffset + count;
+
+    if ((progress > progressMax) && (progressMax != -1)) {
+      NS_WARNING(
+          "unexpected progress values - "
+          "is server exceeding content length?");
+    }
+
+    // make sure params are in range for js
+    if (!InScriptableRange(progressMax)) {
+      progressMax = -1;
+    }
+
+    if (!InScriptableRange(progress)) {
+      progress = -1;
+    }
+
+    if (NS_IsMainThread()) {
+      OnTransportStatus(nullptr, transportStatus, progress, progressMax);
+    } else {
+      rv = NS_DispatchToMainThread(new OnTransportStatusAsyncEvent(
+          this, transportStatus, progress, progressMax));
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    //
+    // we have to manually keep the logical offset of the stream up-to-date.
+    // we cannot depend solely on the offset provided, since we may have
+    // already streamed some data from another source (see, for example,
+    // OnDoneReadingPartialCacheEntry).
+    //
+    int64_t offsetBefore = 0;
+    nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(input);
+    if (seekable && NS_FAILED(seekable->Tell(&offsetBefore))) {
+      seekable = nullptr;
+    }
+
+    nsresult rv =
+        mListener->OnDataAvailable(this, input, mLogicalOffset, count);
+    if (NS_SUCCEEDED(rv)) {
+      // by contract mListener must read all of "count" bytes, but
+      // nsInputStreamPump is tolerant to seekable streams that violate that
+      // and it will redeliver incompletely read data. So we need to do
+      // the same thing when updating the progress counter to stay in sync.
+      int64_t offsetAfter, delta;
+      if (seekable && NS_SUCCEEDED(seekable->Tell(&offsetAfter))) {
+        delta = offsetAfter - offsetBefore;
+        if (delta != count) {
+          count = delta;
+
+          NS_WARNING("Listener OnDataAvailable contract violation");
+          nsCOMPtr<nsIConsoleService> consoleService =
+              do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+          nsAutoString message(nsLiteralString(
+              u"http channel Listener OnDataAvailable contract violation"));
+          if (consoleService) {
+            consoleService->LogStringMessage(message.get());
+          }
+        }
+      }
+      mLogicalOffset += count;
+    }
+
+    return rv;
+  }
+
+  return NS_ERROR_ABORT;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIThreadRetargetableRequest
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::RetargetDeliveryTo(nsISerialEventTarget* aNewTarget) {
+  MOZ_ASSERT(NS_IsMainThread(), "Should be called on main thread only");
+
+  NS_ENSURE_ARG(aNewTarget);
+  if (aNewTarget->IsOnCurrentThread()) {
+    NS_WARNING("Retargeting delivery to same thread");
+    return NS_OK;
+  }
+  if (!mTransactionPump && !mCachePump) {
+    LOG(("nsHttpChannel::RetargetDeliveryTo %p %p no pump available\n", this,
+         aNewTarget));
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsresult rv = NS_OK;
+  // If both cache pump and transaction pump exist, we're probably dealing
+  // with partially cached content. So, we must be able to retarget both.
+  nsCOMPtr<nsIThreadRetargetableRequest> retargetableCachePump;
+  nsCOMPtr<nsIThreadRetargetableRequest> retargetableTransactionPump;
+  if (mCachePump) {
+    retargetableCachePump = do_QueryObject(mCachePump);
+    // nsInputStreamPump should implement this interface.
+    MOZ_ASSERT(retargetableCachePump);
+    rv = retargetableCachePump->RetargetDeliveryTo(aNewTarget);
+  }
+  if (NS_SUCCEEDED(rv) && mTransactionPump) {
+    retargetableTransactionPump = do_QueryObject(mTransactionPump);
+    // nsInputStreamPump should implement this interface.
+    MOZ_ASSERT(retargetableTransactionPump);
+    rv = retargetableTransactionPump->RetargetDeliveryTo(aNewTarget);
+
+    // If retarget fails for transaction pump, we must restore mCachePump.
+    if (NS_FAILED(rv) && retargetableCachePump) {
+      nsCOMPtr<nsISerialEventTarget> main = GetMainThreadSerialEventTarget();
+      NS_ENSURE_TRUE(main, NS_ERROR_UNEXPECTED);
+      rv = retargetableCachePump->RetargetDeliveryTo(main);
+    }
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetDeliveryTarget(nsISerialEventTarget** aEventTarget) {
+  if (mCachePump) {
+    return mCachePump->GetDeliveryTarget(aEventTarget);
+  }
+  if (mTransactionPump) {
+    nsCOMPtr<nsIThreadRetargetableRequest> request =
+        do_QueryInterface(mTransactionPump);
+    return request->GetDeliveryTarget(aEventTarget);
+  }
+  return NS_ERROR_NOT_AVAILABLE;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsThreadRetargetableStreamListener
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::CheckListenerChain() {
+  NS_ASSERTION(NS_IsMainThread(), "Should be on main thread!");
+  nsresult rv = NS_OK;
+  nsCOMPtr<nsIThreadRetargetableStreamListener> retargetableListener =
+      do_QueryInterface(mListener, &rv);
+  if (retargetableListener) {
+    rv = retargetableListener->CheckListenerChain();
+  }
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsITransportEventSink
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnTransportStatus(nsITransport* trans, nsresult status,
+                                 int64_t progress, int64_t progressMax) {
+  MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread only");
+  // cache the progress sink so we don't have to query for it each time.
+  if (!mProgressSink) GetCallback(mProgressSink);
+
+  if (status == NS_NET_STATUS_CONNECTED_TO ||
+      status == NS_NET_STATUS_WAITING_FOR) {
+    bool isTrr = false;
+    bool echConfigUsed = false;
+    if (mTransaction) {
+      mTransaction->GetNetworkAddresses(mSelfAddr, mPeerAddr, isTrr,
+                                        mEffectiveTRRMode, mTRRSkipReason,
+                                        echConfigUsed);
+    } else {
+      nsCOMPtr<nsISocketTransport> socketTransport = do_QueryInterface(trans);
+      if (socketTransport) {
+        socketTransport->GetSelfAddr(&mSelfAddr);
+        socketTransport->GetPeerAddr(&mPeerAddr);
+        socketTransport->ResolvedByTRR(&isTrr);
+        socketTransport->GetEffectiveTRRMode(&mEffectiveTRRMode);
+        socketTransport->GetEchConfigUsed(&echConfigUsed);
+      }
+    }
+
+    StoreResolvedByTRR(isTrr);
+    StoreEchConfigUsed(echConfigUsed);
+  }
+
+  // block socket status event after Cancel or OnStopRequest has been called.
+  if (mProgressSink && NS_SUCCEEDED(mStatus) && LoadIsPending()) {
+    LOG(("sending progress%s notification [this=%p status=%" PRIx32
+         " progress=%" PRId64 "/%" PRId64 "]\n",
+         (mLoadFlags & LOAD_BACKGROUND) ? "" : " and status", this,
+         static_cast<uint32_t>(status), progress, progressMax));
+
+    nsAutoCString host;
+    mURI->GetHost(host);
+    if (!(mLoadFlags & LOAD_BACKGROUND)) {
+      mProgressSink->OnStatus(this, status, NS_ConvertUTF8toUTF16(host).get());
+    } else {
+      nsCOMPtr<nsIParentChannel> parentChannel;
+      NS_QueryNotificationCallbacks(this, parentChannel);
+      // If the event sink is |HttpChannelParent|, we have to send status
+      // events to it even if LOAD_BACKGROUND is set. |HttpChannelParent|
+      // needs to be aware of whether the status is
+      // |NS_NET_STATUS_RECEIVING_FROM| or |NS_NET_STATUS_READING|.
+      // LOAD_BACKGROUND is checked again in |HttpChannelChild|, so the final
+      // consumer won't get this event.
+      if (SameCOMIdentity(parentChannel, mProgressSink)) {
+        mProgressSink->OnStatus(this, status,
+                                NS_ConvertUTF8toUTF16(host).get());
+      }
+    }
+
+    if (progress > 0) {
+      if ((progress > progressMax) && (progressMax != -1)) {
+        NS_WARNING("unexpected progress values");
+      }
+
+      // Try to get mProgressSink if it was nulled out during OnStatus.
+      if (!mProgressSink) {
+        GetCallback(mProgressSink);
+      }
+      if (mProgressSink) {
+        mProgressSink->OnProgress(this, progress, progressMax);
+      }
+    }
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsICacheInfoChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::IsFromCache(bool* value) {
+  if (!LoadIsPending()) return NS_ERROR_NOT_AVAILABLE;
+
+  if (!mRaceCacheWithNetwork) {
+    // return false if reading a partial cache entry; the data isn't
+    // entirely from the cache!
+    *value = (mCachePump || (mLoadFlags & LOAD_ONLY_IF_MODIFIED)) &&
+             mCachedContentIsValid && !LoadCachedContentIsPartial();
+    return NS_OK;
+  }
+
+  // If we are racing network and cache (or skipping the cache)
+  // we just return the first response source.
+  *value = mFirstResponseSource == RESPONSE_FROM_CACHE;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheEntryId(uint64_t* aCacheEntryId) {
+  bool fromCache = false;
+  if (NS_FAILED(IsFromCache(&fromCache)) || !fromCache || !mCacheEntry ||
+      NS_FAILED(mCacheEntry->GetCacheEntryId(aCacheEntryId))) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheTokenFetchCount(uint32_t* _retval) {
+  NS_ENSURE_ARG_POINTER(_retval);
+  nsCOMPtr<nsICacheEntry> cacheEntry =
+      mCacheEntry ? mCacheEntry : mAltDataCacheEntry;
+  if (!cacheEntry) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  return cacheEntry->GetFetchCount(_retval);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheTokenExpirationTime(uint32_t* _retval) {
+  NS_ENSURE_ARG_POINTER(_retval);
+  if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
+
+  return mCacheEntry->GetExpirationTime(_retval);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetAllowStaleCacheContent(bool aAllowStaleCacheContent) {
+  LOG(("nsHttpChannel::SetAllowStaleCacheContent [this=%p, allow=%d]", this,
+       aAllowStaleCacheContent));
+  StoreAllowStaleCacheContent(aAllowStaleCacheContent);
+  return NS_OK;
+}
+NS_IMETHODIMP
+nsHttpChannel::GetAllowStaleCacheContent(bool* aAllowStaleCacheContent) {
+  NS_ENSURE_ARG(aAllowStaleCacheContent);
+  *aAllowStaleCacheContent = LoadAllowStaleCacheContent();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetForceValidateCacheContent(bool aForceValidateCacheContent) {
+  LOG(("nsHttpChannel::SetForceValidateCacheContent [this=%p, allow=%d]", this,
+       aForceValidateCacheContent));
+  StoreForceValidateCacheContent(aForceValidateCacheContent);
+  return NS_OK;
+}
+NS_IMETHODIMP
+nsHttpChannel::GetForceValidateCacheContent(bool* aForceValidateCacheContent) {
+  NS_ENSURE_ARG(aForceValidateCacheContent);
+  *aForceValidateCacheContent = LoadForceValidateCacheContent();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetPreferCacheLoadOverBypass(bool aPreferCacheLoadOverBypass) {
+  StorePreferCacheLoadOverBypass(aPreferCacheLoadOverBypass);
+  return NS_OK;
+}
+NS_IMETHODIMP
+nsHttpChannel::GetPreferCacheLoadOverBypass(bool* aPreferCacheLoadOverBypass) {
+  NS_ENSURE_ARG(aPreferCacheLoadOverBypass);
+  *aPreferCacheLoadOverBypass = LoadPreferCacheLoadOverBypass();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::PreferAlternativeDataType(
+    const nsACString& aType, const nsACString& aContentType,
+    PreferredAlternativeDataDeliveryType aDeliverAltData) {
+  ENSURE_CALLED_BEFORE_ASYNC_OPEN();
+  mPreferredCachedAltDataTypes.AppendElement(PreferredAlternativeDataTypeParams(
+      nsCString(aType), nsCString(aContentType), aDeliverAltData));
+  return NS_OK;
+}
+
+const nsTArray<PreferredAlternativeDataTypeParams>&
+nsHttpChannel::PreferredAlternativeDataTypes() {
+  return mPreferredCachedAltDataTypes;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetAlternativeDataType(nsACString& aType) {
+  // must be called during or after OnStartRequest
+  if (!LoadAfterOnStartRequestBegun()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  aType = mAvailableCachedAltDataType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OpenAlternativeOutputStream(const nsACString& type,
+                                           int64_t predictedSize,
+                                           nsIAsyncOutputStream** _retval) {
+  // OnStopRequest will clear mCacheEntry, but we may use mAltDataCacheEntry
+  // if the consumer called PreferAlternativeDataType()
+  nsCOMPtr<nsICacheEntry> cacheEntry =
+      mCacheEntry ? mCacheEntry : mAltDataCacheEntry;
+  if (!cacheEntry) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  nsresult rv =
+      cacheEntry->OpenAlternativeOutputStream(type, predictedSize, _retval);
+  if (NS_SUCCEEDED(rv)) {
+    // Clear this metadata flag in case it exists.
+    // The caller of this method may set it again.
+    cacheEntry->SetMetaDataElement("alt-data-from-child", nullptr);
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetOriginalInputStream(nsIInputStreamReceiver* aReceiver) {
+  if (aReceiver == nullptr) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  nsCOMPtr<nsIInputStream> inputStream;
+
+  nsCOMPtr<nsICacheEntry> cacheEntry =
+      mCacheEntry ? mCacheEntry : mAltDataCacheEntry;
+  if (cacheEntry) {
+    cacheEntry->OpenInputStream(0, getter_AddRefs(inputStream));
+  }
+  aReceiver->OnInputStreamReady(inputStream);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetAlternativeDataInputStream(nsIInputStream** aInputStream) {
+  NS_ENSURE_ARG_POINTER(aInputStream);
+
+  *aInputStream = nullptr;
+
+  nsCOMPtr<nsICacheEntry> cacheEntry =
+      mCacheEntry ? mCacheEntry : mAltDataCacheEntry;
+  if (!mAvailableCachedAltDataType.IsEmpty() && cacheEntry) {
+    nsresult rv = cacheEntry->OpenAlternativeInputStream(
+        mAvailableCachedAltDataType, aInputStream);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsICachingChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::IsRacing(bool* aIsRacing) {
+  if (!LoadAfterOnStartRequestBegun()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  *aIsRacing = mRaceCacheWithNetwork;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheToken(nsISupports** token) {
+  NS_ENSURE_ARG_POINTER(token);
+  if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
+  return CallQueryInterface(mCacheEntry, token);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheToken(nsISupports* token) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheKey(uint32_t* key) {
+  NS_ENSURE_ARG_POINTER(key);
+
+  LOG(("nsHttpChannel::GetCacheKey [this=%p]\n", this));
+
+  *key = mPostID;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheKey(uint32_t key) {
+  LOG(("nsHttpChannel::SetCacheKey [this=%p key=%u]\n", this, key));
+
+  ENSURE_CALLED_BEFORE_CONNECT();
+
+  mPostID = key;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetCacheOnlyMetadata(bool* aOnlyMetadata) {
+  NS_ENSURE_ARG(aOnlyMetadata);
+  *aOnlyMetadata = LoadCacheOnlyMetadata();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetCacheOnlyMetadata(bool aOnlyMetadata) {
+  LOG(("nsHttpChannel::SetCacheOnlyMetadata [this=%p only-metadata=%d]\n", this,
+       aOnlyMetadata));
+
+  ENSURE_CALLED_BEFORE_ASYNC_OPEN();
+
+  StoreCacheOnlyMetadata(aOnlyMetadata);
+  if (aOnlyMetadata) {
+    mLoadFlags |= LOAD_ONLY_IF_MODIFIED;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::GetPin(bool* aPin) {
+  NS_ENSURE_ARG(aPin);
+  *aPin = LoadPinCacheContent();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetPin(bool aPin) {
+  LOG(("nsHttpChannel::SetPin [this=%p pin=%d]\n", this, aPin));
+
+  ENSURE_CALLED_BEFORE_CONNECT();
+
+  StorePinCacheContent(aPin);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::ForceCacheEntryValidFor(uint32_t aSecondsToTheFuture) {
+  if (!mCacheEntry) {
+    LOG(
+        ("nsHttpChannel::ForceCacheEntryValidFor found no cache entry "
+         "for this channel [this=%p].",
+         this));
+  } else {
+    mCacheEntry->ForceValidFor(aSecondsToTheFuture);
+
+    nsAutoCString key;
+    mCacheEntry->GetKey(key);
+
+    LOG(
+        ("nsHttpChannel::ForceCacheEntryValidFor successfully forced valid "
+         "entry with key %s for %d seconds. [this=%p]",
+         key.get(), aSecondsToTheFuture, this));
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIResumableChannel
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::ResumeAt(uint64_t aStartPos, const nsACString& aEntityID) {
+  LOG(("nsHttpChannel::ResumeAt [this=%p startPos=%" PRIu64 " id='%s']\n", this,
+       aStartPos, PromiseFlatCString(aEntityID).get()));
+  mEntityID = aEntityID;
+  mStartPos = aStartPos;
+  StoreResuming(true);
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::DoAuthRetry(
+    HttpTransactionShell* aTransWithStickyConn,
+    const std::function<nsresult(nsHttpChannel*, nsresult)>&
+        aContinueOnStopRequestFunc) {
+  LOG(("nsHttpChannel::DoAuthRetry [this=%p, aTransWithStickyConn=%p]\n", this,
+       aTransWithStickyConn));
+
+  MOZ_ASSERT(!mTransaction, "should not have a transaction");
+
+  // Note that we don't have to toggle |IsPending| anymore. See the reasons
+  // below.
+  // 1. We can't suspend the channel during "http-on-modify-request"
+  // when |IsPending| is false.
+  // 2. We don't check |IsPending| in SetRequestHeader now.
+
+  // Reset RequestObserversCalled because we've probably called the request
+  // observers once already.
+  StoreRequestObserversCalled(false);
+
+  // fetch cookies, and add them to the request header.
+  // the server response could have included cookies that must be sent with
+  // this authentication attempt (bug 84794).
+  // TODO: save cookies from auth response and send them here (bug 572151).
+  AddCookiesToRequest();
+
+  // notify "http-on-modify-request" observers
+  CallOnModifyRequestObservers();
+
+  RefPtr<HttpTransactionShell> trans(aTransWithStickyConn);
+  return CallOrWaitForResume(
+      [trans{std::move(trans)}, aContinueOnStopRequestFunc](auto* self) {
+        return self->ContinueDoAuthRetry(trans, aContinueOnStopRequestFunc);
+      });
+}
+
+nsresult nsHttpChannel::ContinueDoAuthRetry(
+    HttpTransactionShell* aTransWithStickyConn,
+    const std::function<nsresult(nsHttpChannel*, nsresult)>&
+        aContinueOnStopRequestFunc) {
+  LOG(("nsHttpChannel::ContinueDoAuthRetry [this=%p]\n", this));
+  StoreIsPending(true);
+
+  // get rid of the old response headers
+  mResponseHead = nullptr;
+
+  // rewind the upload stream
+  if (mUploadStream) {
+    nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mUploadStream);
+    nsresult rv = NS_ERROR_NO_INTERFACE;
+    if (seekable) {
+      rv = seekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);
+    }
+
+    // This should not normally happen, but it's possible that big memory
+    // blobs originating in the other process can't be rewinded.
+    // In that case we just fail the request, otherwise the content length
+    // will not match and this load will never complete.
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  // always set sticky connection flag
+  mCaps |= NS_HTTP_STICKY_CONNECTION;
+  // and when needed, allow restart regardless the sticky flag
+  if (LoadAuthConnectionRestartable()) {
+    LOG(("  connection made restartable"));
+    mCaps |= NS_HTTP_CONNECTION_RESTARTABLE;
+    StoreAuthConnectionRestartable(false);
+  } else {
+    LOG(("  connection made non-restartable"));
+    mCaps &= ~NS_HTTP_CONNECTION_RESTARTABLE;
+  }
+
+  // notify "http-on-before-connect" observers
+  gHttpHandler->OnBeforeConnect(this);
+
+  RefPtr<HttpTransactionShell> trans(aTransWithStickyConn);
+  return CallOrWaitForResume(
+      [trans{std::move(trans)}, aContinueOnStopRequestFunc](auto* self) {
+        nsresult rv = self->DoConnect(trans);
+        return aContinueOnStopRequestFunc(self, rv);
+      });
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIAsyncVerifyRedirectCallback
+//-----------------------------------------------------------------------------
+
+nsresult nsHttpChannel::WaitForRedirectCallback() {
+  nsresult rv;
+  LOG(("nsHttpChannel::WaitForRedirectCallback [this=%p]\n", this));
+
+  if (mTransactionPump) {
+    rv = mTransactionPump->Suspend();
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+  if (mCachePump) {
+    rv = mCachePump->Suspend();
+    if (NS_FAILED(rv) && mTransactionPump) {
+#ifdef DEBUG
+      nsresult resume =
+#endif
+          mTransactionPump->Resume();
+      MOZ_ASSERT(NS_SUCCEEDED(resume), "Failed to resume transaction pump");
+    }
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  StoreWaitingForRedirectCallback(true);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnRedirectVerifyCallback(nsresult result) {
+  LOG(
+      ("nsHttpChannel::OnRedirectVerifyCallback [this=%p] "
+       "result=%" PRIx32 " stack=%zu WaitingForRedirectCallback=%u\n",
+       this, static_cast<uint32_t>(result), mRedirectFuncStack.Length(),
+       LoadWaitingForRedirectCallback()));
+  MOZ_ASSERT(LoadWaitingForRedirectCallback(),
+             "Someone forgot to call WaitForRedirectCallback() ?!");
+  StoreWaitingForRedirectCallback(false);
+
+  if (mCanceled && NS_SUCCEEDED(result)) result = NS_BINDING_ABORTED;
+
+  for (uint32_t i = mRedirectFuncStack.Length(); i > 0;) {
+    --i;
+    // Pop the last function pushed to the stack
+    nsContinueRedirectionFunc func = mRedirectFuncStack.PopLastElement();
+
+    // Call it with the result we got from the callback or the deeper
+    // function call.
+    result = (this->*func)(result);
+
+    // If a new function has been pushed to the stack and placed us in the
+    // waiting state, we need to break the chain and wait for the callback
+    // again.
+    if (LoadWaitingForRedirectCallback()) break;
+  }
+
+  if (NS_FAILED(result) && !mCanceled) {
+    // First, cancel this channel if we are in failure state to set mStatus
+    // and let it be propagated to pumps.
+    Cancel(result);
+  }
+
+  if (!LoadWaitingForRedirectCallback()) {
+    // We are not waiting for the callback. At this moment we must release
+    // reference to the redirect target channel, otherwise we may leak.
+    mRedirectChannel = nullptr;
+  }
+
+  // We always resume the pumps here. If all functions on stack have been
+  // called we need OnStopRequest to be triggered, and if we broke out of the
+  // loop above (and are thus waiting for a new callback) the suspension
+  // count must be balanced in the pumps.
+  if (mTransactionPump) mTransactionPump->Resume();
+  if (mCachePump) mCachePump->Resume();
+
+  return result;
+}
+
+void nsHttpChannel::PushRedirectAsyncFunc(nsContinueRedirectionFunc func) {
+  mRedirectFuncStack.AppendElement(func);
+}
+
+void nsHttpChannel::PopRedirectAsyncFunc(nsContinueRedirectionFunc func) {
+  MOZ_ASSERT(func == mRedirectFuncStack.LastElement(),
+             "Trying to pop wrong method from redirect async stack!");
+
+  mRedirectFuncStack.RemoveLastElement();
+}
+
+//-----------------------------------------------------------------------------
+// nsIDNSListener functions
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpChannel::OnLookupComplete(nsICancelable* request, nsIDNSRecord* rec,
+                                nsresult status) {
+  MOZ_ASSERT(NS_IsMainThread(), "Expecting DNS callback on main thread.");
+
+  LOG(
+      ("nsHttpChannel::OnLookupComplete [this=%p] prefetch complete%s: "
+       "%s status[0x%" PRIx32 "]\n",
+       this, mCaps & NS_HTTP_REFRESH_DNS ? ", refresh requested" : "",
+       NS_SUCCEEDED(status) ? "success" : "failure",
+       static_cast<uint32_t>(status)));
+
+  // Unset DNS cache refresh if it was requested,
+  if (mCaps & NS_HTTP_REFRESH_DNS) {
+    mCaps &= ~NS_HTTP_REFRESH_DNS;
+    if (mTransaction) {
+      mTransaction->SetDNSWasRefreshed();
+    }
+  }
+
+  if (!mDNSBlockingPromise.IsEmpty()) {
+    if (NS_SUCCEEDED(status)) {
+      nsCOMPtr<nsIDNSRecord> record(rec);
+      mDNSBlockingPromise.Resolve(record, __func__);
+    } else {
+      mDNSBlockingPromise.Reject(status, __func__);
+    }
+  }
+
+  return NS_OK;
+}
+
+void nsHttpChannel::OnHTTPSRRAvailable(nsIDNSHTTPSSVCRecord* aRecord) {
+  MOZ_ASSERT(NS_IsMainThread(), "Expecting DNS callback on main thread.");
+
+  LOG(("nsHttpChannel::OnHTTPSRRAvailable [this=%p, aRecord=%p]\n", this,
+       aRecord));
+
+  if (mHTTPSSVCRecord) {
+    MOZ_ASSERT(false, "OnHTTPSRRAvailable called twice!");
+    return;
+  }
+
+  nsCOMPtr<nsIDNSHTTPSSVCRecord> record = aRecord;
+  mHTTPSSVCRecord.emplace(std::move(record));
+  const nsCOMPtr<nsIDNSHTTPSSVCRecord>& httprr = mHTTPSSVCRecord.ref();
+
+  if (LoadWaitHTTPSSVCRecord()) {
+    MOZ_ASSERT(mURI->SchemeIs("http"));
+
+    StoreWaitHTTPSSVCRecord(false);
+    nsresult rv = ContinueOnBeforeConnect(!!httprr, mStatus, !!httprr);
+    if (NS_FAILED(rv)) {
+      CloseCacheEntry(false);
+      Unused << AsyncAbort(rv);
+    }
+  } else {
+    // This channel is not canceled and the transaction is not created.
+    if (httprr && NS_SUCCEEDED(mStatus) && !mTransaction &&
+        (mFirstResponseSource != RESPONSE_FROM_CACHE)) {
+      bool hasIPAddress = false;
+      Unused << httprr->GetHasIPAddresses(&hasIPAddress);
+      Telemetry::Accumulate(Telemetry::DNS_HTTPSSVC_RECORD_RECEIVING_STAGE,
+                            hasIPAddress
+                                ? HTTPSSVC_WITH_IPHINT_RECEIVED_STAGE_0
+                                : HTTPSSVC_WITHOUT_IPHINT_RECEIVED_STAGE_0);
+      StoreHTTPSSVCTelemetryReported(true);
+    }
+  }
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel internal functions
+//-----------------------------------------------------------------------------
+
+// Creates an URI to the given location using current URI for base and charset
+nsresult nsHttpChannel::CreateNewURI(const char* loc, nsIURI** newURI) {
+  nsCOMPtr<nsIIOService> ioService;
+  nsresult rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+  if (NS_FAILED(rv)) return rv;
+
+  return ioService->NewURI(nsDependentCString(loc), nullptr, mURI, newURI);
+}
+
+void nsHttpChannel::MaybeInvalidateCacheEntryForSubsequentGet() {
+  // See RFC 2616 section 5.1.1. These are considered valid
+  // methods which DO NOT invalidate cache-entries for the
+  // referred resource. POST, PUT and DELETE as well as any
+  // other method not listed here will potentially invalidate
+  // any cached copy of the resource
+  if (mRequestHead.IsGet() || mRequestHead.IsOptions() ||
+      mRequestHead.IsHead() || mRequestHead.IsTrace() ||
+      mRequestHead.IsConnect()) {
+    return;
+  }
+
+  // Invalidate the request-uri.
+  if (LOG_ENABLED()) {
+    nsAutoCString key;
+    mURI->GetAsciiSpec(key);
+    LOG(("MaybeInvalidateCacheEntryForSubsequentGet [this=%p uri=%s]\n", this,
+         key.get()));
+  }
+
+  DoInvalidateCacheEntry(mURI);
+
+  // Invalidate Location-header if set
+  nsAutoCString location;
+  Unused << mResponseHead->GetHeader(nsHttp::Location, location);
+  if (!location.IsEmpty()) {
+    LOG(("  Location-header=%s\n", location.get()));
+    InvalidateCacheEntryForLocation(location.get());
+  }
+
+  // Invalidate Content-Location-header if set
+  Unused << mResponseHead->GetHeader(nsHttp::Content_Location, location);
+  if (!location.IsEmpty()) {
+    LOG(("  Content-Location-header=%s\n", location.get()));
+    InvalidateCacheEntryForLocation(location.get());
+  }
+}
+
+void nsHttpChannel::InvalidateCacheEntryForLocation(const char* location) {
+  nsAutoCString tmpCacheKey, tmpSpec;
+  nsCOMPtr<nsIURI> resultingURI;
+  nsresult rv = CreateNewURI(location, getter_AddRefs(resultingURI));
+  if (NS_SUCCEEDED(rv) && HostPartIsTheSame(resultingURI)) {
+    DoInvalidateCacheEntry(resultingURI);
+  } else {
+    LOG(("  hosts not matching\n"));
+  }
+}
+
+void nsHttpChannel::DoInvalidateCacheEntry(nsIURI* aURI) {
+  // NOTE:
+  // Following comments 24,32 and 33 in bug #327765, we only care about
+  // the cache in the protocol-handler.
+  // The logic below deviates from the original logic in OpenCacheEntry on
+  // one point by using only READ_ONLY access-policy. I think this is safe.
+
+  nsresult rv;
+
+  nsAutoCString key;
+  if (LOG_ENABLED()) {
+    aURI->GetAsciiSpec(key);
+  }
+
+  LOG(("DoInvalidateCacheEntry [channel=%p key=%s]", this, key.get()));
+
+  nsCOMPtr<nsICacheStorageService> cacheStorageService(
+      components::CacheStorage::Service());
+  rv = cacheStorageService ? NS_OK : NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsICacheStorage> cacheStorage;
+  if (NS_SUCCEEDED(rv)) {
+    RefPtr<LoadContextInfo> info = GetLoadContextInfo(this);
+    rv = cacheStorageService->DiskCacheStorage(info,
+                                               getter_AddRefs(cacheStorage));
+  }
+
+  if (NS_SUCCEEDED(rv)) {
+    rv = cacheStorage->AsyncDoomURI(aURI, ""_ns, nullptr);
+  }
+
+  LOG(("DoInvalidateCacheEntry [channel=%p key=%s rv=%d]", this, key.get(),
+       int(rv)));
+}
+
+void nsHttpChannel::AsyncOnExamineCachedResponse() {
+  gHttpHandler->OnExamineCachedResponse(this);
+}
+
+void nsHttpChannel::UpdateAggregateCallbacks() {
+  if (!mTransaction) {
+    return;
+  }
+  nsCOMPtr<nsIInterfaceRequestor> callbacks;
+  NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
+                                         GetCurrentSerialEventTarget(),
+                                         getter_AddRefs(callbacks));
+  mTransaction->SetSecurityCallbacks(callbacks);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetLoadGroup(nsILoadGroup* aLoadGroup) {
+  MOZ_ASSERT(NS_IsMainThread(), "Wrong thread.");
+
+  nsresult rv = HttpBaseChannel::SetLoadGroup(aLoadGroup);
+  if (NS_SUCCEEDED(rv)) {
+    UpdateAggregateCallbacks();
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks) {
+  MOZ_ASSERT(NS_IsMainThread(), "Wrong thread.");
+
+  nsresult rv = HttpBaseChannel::SetNotificationCallbacks(aCallbacks);
+  if (NS_SUCCEEDED(rv)) {
+    UpdateAggregateCallbacks();
+  }
+  return rv;
+}
+
+bool nsHttpChannel::AwaitingCacheCallbacks() {
+  return LoadWaitForCacheEntry() != 0;
+}
+
+void nsHttpChannel::SetPushedStreamTransactionAndId(
+    HttpTransactionShell* aTransWithPushedStream, uint32_t aPushedStreamId) {
+  MOZ_ASSERT(!mTransWithPushedStream);
+  LOG(("nsHttpChannel::SetPushedStreamTransaction [this=%p] trans=%p", this,
+       aTransWithPushedStream));
+
+  mTransWithPushedStream = aTransWithPushedStream;
+  mPushedStreamId = aPushedStreamId;
+}
+
+nsresult nsHttpChannel::OnPush(uint32_t aPushedStreamId, const nsACString& aUrl,
+                               const nsACString& aRequestString,
+                               HttpTransactionShell* aTransaction) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aTransaction);
+  LOG(("nsHttpChannel::OnPush [this=%p, trans=%p]\n", this, aTransaction));
+
+  MOZ_ASSERT(mCaps & NS_HTTP_ONPUSH_LISTENER);
+  nsCOMPtr<nsIHttpPushListener> pushListener;
+  NS_QueryNotificationCallbacks(mCallbacks, mLoadGroup,
+                                NS_GET_IID(nsIHttpPushListener),
+                                getter_AddRefs(pushListener));
+
+  if (!pushListener) {
+    LOG(
+        ("nsHttpChannel::OnPush [this=%p] notification callbacks do not "
+         "implement nsIHttpPushListener\n",
+         this));
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsCOMPtr<nsIURI> pushResource;
+  nsresult rv;
+
+  // Create a Channel for the Push Resource
+  rv = NS_NewURI(getter_AddRefs(pushResource), aUrl);
+  if (NS_FAILED(rv)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIIOService> ioService;
+  rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIChannel> pushChannel;
+  rv = NS_NewChannelInternal(getter_AddRefs(pushChannel), pushResource,
+                             mLoadInfo,
+                             nullptr,  // PerformanceStorage
+                             nullptr,  // aLoadGroup
+                             nullptr,  // aCallbacks
+                             nsIRequest::LOAD_NORMAL, ioService);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIHttpChannel> pushHttpChannel = do_QueryInterface(pushChannel);
+  MOZ_ASSERT(pushHttpChannel);
+  if (!pushHttpChannel) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  RefPtr<nsHttpChannel> channel;
+  CallQueryInterface(pushHttpChannel, channel.StartAssignment());
+  MOZ_ASSERT(channel);
+  if (!channel) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  // new channel needs mrqeuesthead and headers from pushedStream
+  channel->mRequestHead.ParseHeaderSet(aRequestString.BeginReading());
+  channel->mLoadGroup = mLoadGroup;
+  channel->mLoadInfo = mLoadInfo;
+  channel->mCallbacks = mCallbacks;
+
+  // Link the trans with pushed stream and the new channel and call listener
+  channel->SetPushedStreamTransactionAndId(aTransaction, aPushedStreamId);
+  rv = pushListener->OnPush(this, pushHttpChannel);
+  return rv;
+}
+
+// static
+bool nsHttpChannel::IsRedirectStatus(uint32_t status) {
+  // 305 disabled as a security measure (see bug 187996).
+  return status == 300 || status == 301 || status == 302 || status == 303 ||
+         status == 307 || status == 308;
+}
+
+void nsHttpChannel::SetCouldBeSynthesized() {
+  MOZ_ASSERT(!BypassServiceWorker());
+  StoreResponseCouldBeSynthesized(true);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnPreflightSucceeded() {
+  MOZ_ASSERT(LoadRequireCORSPreflight(), "Why did a preflight happen?");
+  StoreIsCorsPreflightDone(1);
+  mPreflightChannel = nullptr;
+
+  return ContinueConnect();
+}
+
+NS_IMETHODIMP
+nsHttpChannel::OnPreflightFailed(nsresult aError) {
+  MOZ_ASSERT(LoadRequireCORSPreflight(), "Why did a preflight happen?");
+  StoreIsCorsPreflightDone(1);
+  mPreflightChannel = nullptr;
+
+  CloseCacheEntry(false);
+  Unused << AsyncAbort(aError);
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::CallOrWaitForResume(
+    const std::function<nsresult(nsHttpChannel*)>& aFunc) {
+  if (mCanceled) {
+    MOZ_ASSERT(NS_FAILED(mStatus));
+    return mStatus;
+  }
+
+  if (mSuspendCount) {
+    LOG(("Waiting until resume [this=%p]\n", this));
+    MOZ_ASSERT(!mCallOnResume);
+    mCallOnResume = aFunc;
+    return NS_OK;
+  }
+
+  return aFunc(this);
+}
+
+// This is loosely based on:
+// https://fetch.spec.whatwg.org/#serializing-a-request-origin
+static bool HasNullRequestOrigin(nsHttpChannel* aChannel, nsIURI* aURI,
+                                 bool isAddonRequest) {
+  // Step 1. If request has a redirect-tainted origin, then return "null".
+  if (aChannel->HasRedirectTaintedOrigin()) {
+    if (StaticPrefs::network_http_origin_redirectTainted()) {
+      return true;
+    }
+  }
+
+  // Non-standard: Only allow HTTP and HTTPS origins.
+  if (!ReferrerInfo::IsReferrerSchemeAllowed(aURI)) {
+    // And moz-extension: for add-on initiated requests.
+    if (!aURI->SchemeIs("moz-extension") || !isAddonRequest) {
+      return true;
+    }
+  }
+
+  // Non-standard: Hide onion URLs.
+  if (StaticPrefs::network_http_referer_hideOnionSource()) {
+    nsAutoCString host;
+    if (NS_SUCCEEDED(aURI->GetAsciiHost(host)) &&
+        StringEndsWith(host, ".onion"_ns)) {
+      return ReferrerInfo::IsCrossOriginRequest(aChannel);
+    }
+  }
+
+  // Step 2. Return request’s origin, serialized.
+  return false;
+}
+
+// Step 8.12. of HTTP-network-or-cache fetch
+//
+// https://fetch.spec.whatwg.org/#append-a-request-origin-header
+void nsHttpChannel::SetOriginHeader() {
+  auto* triggeringPrincipal =
+      BasePrincipal::Cast(mLoadInfo->TriggeringPrincipal());
+
+  if (triggeringPrincipal->IsSystemPrincipal()) {
+    // We can't infer an Origin header from the system principal,
+    // this means system requests use whatever Origin header was specified.
+    return;
+  }
+  bool isAddonRequest = triggeringPrincipal->AddonPolicy() ||
+                        triggeringPrincipal->ContentScriptAddonPolicy();
+
+  // Non-standard: Handle already existing Origin header.
+  nsAutoCString existingHeader;
+  Unused << mRequestHead.GetHeader(nsHttp::Origin, existingHeader);
+  if (!existingHeader.IsEmpty()) {
+    LOG(("nsHttpChannel::SetOriginHeader Origin header already present"));
+    auto const shouldNullifyOriginHeader =
+        [&existingHeader, isAddonRequest](nsHttpChannel* aChannel) {
+          nsCOMPtr<nsIURI> uri;
+          nsresult rv = NS_NewURI(getter_AddRefs(uri), existingHeader);
+          if (NS_FAILED(rv)) {
+            return false;
+          }
+
+          if (HasNullRequestOrigin(aChannel, uri, isAddonRequest)) {
+            return true;
+          }
+
+          nsCOMPtr<nsILoadInfo> info = aChannel->LoadInfo();
+          if (info->GetTainting() == mozilla::LoadTainting::CORS) {
+            return false;
+          }
+
+          return ReferrerInfo::ShouldSetNullOriginHeader(aChannel, uri);
+        };
+
+    if (!existingHeader.EqualsLiteral("null") &&
+        shouldNullifyOriginHeader(this)) {
+      LOG(("nsHttpChannel::SetOriginHeader null Origin by Referrer-Policy"));
+      MOZ_ALWAYS_SUCCEEDS(
+          mRequestHead.SetHeader(nsHttp::Origin, "null"_ns, false /* merge */));
+    }
+    return;
+  }
+
+  if (StaticPrefs::network_http_sendOriginHeader() == 0) {
+    // Custom user setting: 0 means never send Origin header.
+    return;
+  }
+
+  // Step 1. Let serializedOrigin be the result of byte-serializing a request
+  // origin with request.
+  nsAutoCString serializedOrigin;
+  nsCOMPtr<nsIURI> uri;
+  {
+    if (NS_FAILED(triggeringPrincipal->GetURI(getter_AddRefs(uri)))) {
+      return;
+    }
+
+    if (!uri) {
+      if (isAddonRequest) {
+        // For add-on compatibility prefer sending no header at all
+        // instead of `Origin: null`.
+        return;
+      }
+
+      // Otherwise use "null" when the triggeringPrincipal's URI is nullptr.
+      serializedOrigin.AssignLiteral("null");
+    } else if (HasNullRequestOrigin(this, uri, isAddonRequest)) {
+      serializedOrigin.AssignLiteral("null");
+    } else {
+      nsContentUtils::GetASCIIOrigin(uri, serializedOrigin);
+    }
+  }
+
+  // Step 2. If request’s response tainting is "cors" or request’s mode is
+  // "websocket", then append (`Origin`, serializedOrigin) to request’s header
+  // list.
+  //
+  // Note: We don't handle "websocket" here (yet?).
+  if (mLoadInfo->GetTainting() == mozilla::LoadTainting::CORS) {
+    MOZ_ALWAYS_SUCCEEDS(mRequestHead.SetHeader(nsHttp::Origin, serializedOrigin,
+                                               false /* merge */));
+    return;
+  }
+
+  // Step 3. Otherwise, if request’s method is neither `GET` nor `HEAD`, then:
+  if (mRequestHead.IsGet() || mRequestHead.IsHead()) {
+    return;
+  }
+
+  if (!serializedOrigin.EqualsLiteral("null")) {
+    // Step 3.1. (Implemented by ReferrerInfo::ShouldSetNullOriginHeader)
+    if (ReferrerInfo::ShouldSetNullOriginHeader(this, uri)) {
+      serializedOrigin.AssignLiteral("null");
+    } else if (StaticPrefs::network_http_sendOriginHeader() == 1) {
+      // Non-standard: Restrict Origin to same-origin loads if requested by user
+      nsAutoCString currentOrigin;
+      nsContentUtils::GetASCIIOrigin(mURI, currentOrigin);
+      if (!serializedOrigin.EqualsIgnoreCase(currentOrigin.get())) {
+        // Origin header suppressed by user setting.
+        serializedOrigin.AssignLiteral("null");
+      }
+    }
+  }
+
+  // Step 3.2. Append (`Origin`, serializedOrigin) to request’s header list.
+  MOZ_ALWAYS_SUCCEEDS(mRequestHead.SetHeader(nsHttp::Origin, serializedOrigin,
+                                             false /* merge */));
+}
+
+void nsHttpChannel::SetDoNotTrack() {
+  /**
+   * 'DoNotTrack' header should be added if 'privacy.donottrackheader.enabled'
+   * is true or tracking protection is enabled. See bug 1258033.
+   */
+  nsCOMPtr<nsILoadContext> loadContext;
+  NS_QueryNotificationCallbacks(this, loadContext);
+
+  if ((loadContext && loadContext->UseTrackingProtection()) ||
+      StaticPrefs::privacy_donottrackheader_enabled()) {
+    DebugOnly<nsresult> rv =
+        mRequestHead.SetHeader(nsHttp::DoNotTrack, "1"_ns, false);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+  }
+}
+
+void nsHttpChannel::SetGlobalPrivacyControl() {
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+
+  if (StaticPrefs::privacy_globalprivacycontrol_enabled() &&
+      StaticPrefs::privacy_globalprivacycontrol_functionality_enabled()) {
+    // Send the header with a value of 1 to indicate opting-out
+    DebugOnly<nsresult> rv =
+        mRequestHead.SetHeader(nsHttp::GlobalPrivacyControl, "1"_ns, false);
+  }
+}
+
+void nsHttpChannel::ReportRcwnStats(bool isFromNet) {
+  if (!StaticPrefs::network_http_rcwn_enabled()) {
+    return;
+  }
+
+  if (isFromNet) {
+    if (mRaceCacheWithNetwork) {
+      gIOService->IncrementNetWonRequestNumber();
+      Telemetry::Accumulate(
+          Telemetry::NETWORK_RACE_CACHE_BANDWIDTH_RACE_NETWORK_WIN,
+          mTransferSize);
+      if (mRaceDelay) {
+        AccumulateCategorical(
+            Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+                NetworkDelayedRace);
+      } else {
+        AccumulateCategorical(
+            Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+                NetworkRace);
+      }
+    } else {
+      Telemetry::Accumulate(Telemetry::NETWORK_RACE_CACHE_BANDWIDTH_NOT_RACE,
+                            mTransferSize);
+      AccumulateCategorical(
+          Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+              NetworkNoRace);
+    }
+  } else {
+    if (mRaceCacheWithNetwork || mRaceDelay) {
+      gIOService->IncrementCacheWonRequestNumber();
+      Telemetry::Accumulate(
+          Telemetry::NETWORK_RACE_CACHE_BANDWIDTH_RACE_CACHE_WIN,
+          mTransferSize);
+      if (mRaceDelay) {
+        AccumulateCategorical(
+            Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+                CacheDelayedRace);
+      } else {
+        AccumulateCategorical(
+            Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+                CacheRace);
+      }
+    } else {
+      Telemetry::Accumulate(Telemetry::NETWORK_RACE_CACHE_BANDWIDTH_NOT_RACE,
+                            mTransferSize);
+      AccumulateCategorical(
+          Telemetry::LABELS_NETWORK_RACE_CACHE_WITH_NETWORK_USAGE_2::
+              CacheNoRace);
+    }
+  }
+
+  gIOService->IncrementRequestNumber();
+}
+
+static const size_t kPositiveBucketNumbers = 34;
+static const int64_t kPositiveBucketLevels[kPositiveBucketNumbers] = {
+    0,    10,   20,   30,   40,    50,    60,    70,    80,    90,   100,  200,
+    300,  400,  500,  600,  700,   800,   900,   1000,  2000,  3000, 4000, 5000,
+    6000, 7000, 8000, 9000, 10000, 20000, 30000, 40000, 50000, 60000};
+
+/**
+ * For space efficiency, we collect finer resolution for small difference
+ * between net and cache time, coarser for larger.
+ * Bucket #40 for a tie.
+ * #41 to #50 indicates cache wins by 1ms to 100ms, split equally.
+ * #51 to #59 indicates cache wins by 101ms to 1000ms.
+ * #60 to #68 indicates cache wins by 1s to 10s.
+ * #69 to #73 indicates cache wins by 11s to 60s.
+ * #74 indicates cache wins by more than 1 minute.
+ *
+ * #39 to #30 indicates network wins by 1ms to 100ms, split equally.
+ * #29 to #21 indicates network wins by 101ms to 1000ms.
+ * #20 to #12 indicates network wins by 1s to 10s.
+ * #11 to #7 indicates network wins by 11s to 60s.
+ * #6 indicates network wins by more than 1 minute.
+ *
+ * Other bucket numbers are reserved.
+ */
+inline int64_t nsHttpChannel::ComputeTelemetryBucketNumber(
+    int64_t difftime_ms) {
+  int64_t absBucketIndex =
+      std::lower_bound(kPositiveBucketLevels,
+                       kPositiveBucketLevels + kPositiveBucketNumbers,
+                       static_cast<int64_t>(mozilla::Abs(difftime_ms))) -
+      kPositiveBucketLevels;
+
+  return difftime_ms >= 0 ? 40 + absBucketIndex : 40 - absBucketIndex;
+}
+
+void nsHttpChannel::ReportNetVSCacheTelemetry() {
+  nsresult rv;
+  if (!mCacheEntry) {
+    return;
+  }
+
+  // We only report telemetry if the entry is persistent (on disk)
+  bool persistent;
+  rv = mCacheEntry->GetPersistent(&persistent);
+  if (NS_FAILED(rv) || !persistent) {
+    return;
+  }
+
+  uint64_t onStartNetTime = 0;
+  if (NS_FAILED(mCacheEntry->GetOnStartTime(&onStartNetTime))) {
+    return;
+  }
+
+  uint64_t onStopNetTime = 0;
+  if (NS_FAILED(mCacheEntry->GetOnStopTime(&onStopNetTime))) {
+    return;
+  }
+
+  uint64_t onStartCacheTime =
+      (mOnStartRequestTimestamp - mAsyncOpenTime).ToMilliseconds();
+  int64_t onStartDiff = onStartNetTime - onStartCacheTime;
+  onStartDiff = ComputeTelemetryBucketNumber(onStartDiff);
+
+  uint64_t onStopCacheTime = (mCacheReadEnd - mAsyncOpenTime).ToMilliseconds();
+  int64_t onStopDiff = onStopNetTime - onStopCacheTime;
+  onStopDiff = ComputeTelemetryBucketNumber(onStopDiff);
+
+  if (mDidReval) {
+    Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTART_REVALIDATED_V2,
+                          onStartDiff);
+    Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_REVALIDATED_V2,
+                          onStopDiff);
+  } else {
+    Telemetry::Accumulate(
+        Telemetry::HTTP_NET_VS_CACHE_ONSTART_NOTREVALIDATED_V2, onStartDiff);
+    Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_NOTREVALIDATED_V2,
+                          onStopDiff);
+  }
+
+  if (mDidReval) {
+    // We don't report revalidated probes as the data would be skewed.
+    return;
+  }
+
+  if (mCacheOpenWithPriority) {
+    if (mCacheQueueSizeWhenOpen < 5) {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QSMALL_HIGHPRI_V2, onStartDiff);
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QSMALL_HIGHPRI_V2, onStopDiff);
+    } else if (mCacheQueueSizeWhenOpen < 10) {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QMED_HIGHPRI_V2, onStartDiff);
+      Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QMED_HIGHPRI_V2,
+                            onStopDiff);
+    } else {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QBIG_HIGHPRI_V2, onStartDiff);
+      Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QBIG_HIGHPRI_V2,
+                            onStopDiff);
+    }
+  } else {  // The limits are higher for normal priority cache queues
+    if (mCacheQueueSizeWhenOpen < 10) {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QSMALL_NORMALPRI_V2,
+          onStartDiff);
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QSMALL_NORMALPRI_V2, onStopDiff);
+    } else if (mCacheQueueSizeWhenOpen < 50) {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QMED_NORMALPRI_V2, onStartDiff);
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QMED_NORMALPRI_V2, onStopDiff);
+    } else {
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTART_QBIG_NORMALPRI_V2, onStartDiff);
+      Telemetry::Accumulate(
+          Telemetry::HTTP_NET_VS_CACHE_ONSTOP_QBIG_NORMALPRI_V2, onStopDiff);
+    }
+  }
+
+  uint32_t diskStorageSizeK = 0;
+  rv = mCacheEntry->GetDiskStorageSizeInKB(&diskStorageSizeK);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  // No significant difference was observed between different sizes for
+  // |onStartDiff|
+  if (diskStorageSizeK < 256) {
+    Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_SMALL_V2,
+                          onStopDiff);
+  } else {
+    Telemetry::Accumulate(Telemetry::HTTP_NET_VS_CACHE_ONSTOP_LARGE_V2,
+                          onStopDiff);
+  }
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Test_delayCacheEntryOpeningBy(int32_t aTimeout) {
+  LOG(("nsHttpChannel::Test_delayCacheEntryOpeningBy this=%p timeout=%d", this,
+       aTimeout));
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+  mRaceCacheWithNetwork = true;
+  mCacheOpenDelay = aTimeout;
+  if (mCacheOpenTimer) {
+    mCacheOpenTimer->SetDelay(aTimeout);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Test_triggerDelayedOpenCacheEntry() {
+  LOG(("nsHttpChannel::Test_triggerDelayedOpenCacheEntry this=%p", this));
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+  nsresult rv;
+  if (!mCacheOpenDelay) {
+    // No delay was set.
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  if (!mCacheOpenFunc) {
+    // There should be a runnable.
+    return NS_ERROR_FAILURE;
+  }
+  if (mCacheOpenTimer) {
+    rv = mCacheOpenTimer->Cancel();
+    if (NS_FAILED(rv)) {
+      return rv;
+    }
+    mCacheOpenTimer = nullptr;
+  }
+  mCacheOpenDelay = 0;
+  // Avoid re-entrancy issues by nulling our mCacheOpenFunc before calling it.
+  std::function<void(nsHttpChannel*)> cacheOpenFunc = nullptr;
+  std::swap(cacheOpenFunc, mCacheOpenFunc);
+  cacheOpenFunc(this);
+
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::TriggerNetworkWithDelay(uint32_t aDelay) {
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+
+  LOG(("nsHttpChannel::TriggerNetworkWithDelay [this=%p, delay=%u]\n", this,
+       aDelay));
+
+  if (mCanceled) {
+    LOG(("  channel was canceled.\n"));
+    return mStatus;
+  }
+
+  // If a network request has already gone out, there is no point in
+  // doing this again.
+  if (mNetworkTriggered) {
+    LOG(("  network already triggered. Returning.\n"));
+    return NS_OK;
+  }
+
+  if (mNetworkTriggerDelay) {
+    aDelay = mNetworkTriggerDelay;
+  }
+
+  if (!aDelay) {
+    // We cannot call TriggerNetwork() directly here, because it would
+    // cause performance regression in tp6 tests, see bug 1398847.
+    return NS_DispatchToMainThread(
+        NewRunnableMethod("net::nsHttpChannel::TriggerNetworkWithDelay", this,
+                          &nsHttpChannel::TriggerNetwork),
+        NS_DISPATCH_NORMAL);
+  }
+
+  MOZ_ASSERT(!mNetworkTriggerTimer);
+  mNetworkTriggerTimer = NS_NewTimer();
+  auto callback = MakeRefPtr<TimerCallback>(this);
+  LOG(("Creating new networkTriggertimer for delay"));
+  mNetworkTriggerTimer->InitWithCallback(callback, aDelay,
+                                         nsITimer::TYPE_ONE_SHOT);
+  return NS_OK;
+}
+
+nsresult nsHttpChannel::TriggerNetwork() {
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+
+  LOG(("nsHttpChannel::TriggerNetwork [this=%p]\n", this));
+
+  if (mCanceled) {
+    LOG(("  channel was canceled.\n"));
+    return mStatus;
+  }
+
+  // If a network request has already gone out, there is no point in
+  // doing this again.
+  if (mNetworkTriggered) {
+    LOG(("  network already triggered. Returning.\n"));
+    return NS_OK;
+  }
+
+  mNetworkTriggered = true;
+  if (mNetworkTriggerTimer) {
+    mNetworkTriggerTimer->Cancel();
+    mNetworkTriggerTimer = nullptr;
+  }
+
+  // If we are waiting for a proxy request, that means we can't trigger
+  // the next step just yet. We need for mConnectionInfo to be non-null
+  // before we call ContinueConnect. OnProxyAvailable will trigger
+  // BeginConnect, and Connect will call ContinueConnect even if it's
+  // for the cache callbacks.
+  if (mProxyRequest) {
+    LOG(("  proxy request in progress. Delaying network trigger.\n"));
+    mWaitingForProxy = true;
+    return NS_OK;
+  }
+
+  // If |mCacheOpenFunc| is assigned, we're delaying opening the entry to
+  // simulate racing. Although cache entry opening hasn't started yet, we're
+  // actually racing, so we must set mRaceCacheWithNetwork to true now.
+  mRaceCacheWithNetwork =
+      AwaitingCacheCallbacks() &&
+      (mCacheOpenFunc || StaticPrefs::network_http_rcwn_enabled());
+
+  LOG(("  triggering network rcwn=%d\n", bool(mRaceCacheWithNetwork)));
+  return ContinueConnect();
+}
+
+void nsHttpChannel::MaybeRaceCacheWithNetwork() {
+  nsresult rv;
+
+  nsCOMPtr<nsINetworkLinkService> netLinkSvc =
+      do_GetService(NS_NETWORK_LINK_SERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  uint32_t linkType;
+  rv = netLinkSvc->GetLinkType(&linkType);
+  if (NS_FAILED(rv)) {
+    return;
+  }
+
+  if (!(linkType == nsINetworkLinkService::LINK_TYPE_ETHERNET ||
+#ifndef MOZ_WIDGET_ANDROID
+        // On Android we don't assume an unknown link type is unmetered
+        linkType == nsINetworkLinkService::LINK_TYPE_UNKNOWN ||
+#endif
+        linkType == nsINetworkLinkService::LINK_TYPE_USB ||
+        linkType == nsINetworkLinkService::LINK_TYPE_WIFI)) {
+    return;
+  }
+
+  // Don't trigger the network if the load flags say so.
+  if (mLoadFlags & (LOAD_ONLY_FROM_CACHE | LOAD_NO_NETWORK_IO)) {
+    return;
+  }
+
+  // We must not race if the channel has a failure status code.
+  if (NS_FAILED(mStatus)) {
+    return;
+  }
+
+  // If a CORS Preflight is required we must not race.
+  if (LoadRequireCORSPreflight() && !LoadIsCorsPreflightDone()) {
+    return;
+  }
+
+  if (CacheFileUtils::CachePerfStats::IsCacheSlow()) {
+    // If the cache is slow, trigger the network request immediately.
+    mRaceDelay = 0;
+  } else {
+    // Give cache a headstart of 3 times the average cache entry open time.
+    mRaceDelay = CacheFileUtils::CachePerfStats::GetAverage(
+                     CacheFileUtils::CachePerfStats::ENTRY_OPEN, true) *
+                 3;
+    // We use microseconds in CachePerfStats but we need milliseconds
+    // for TriggerNetwork.
+    mRaceDelay /= 1000;
+  }
+
+  mRaceDelay = clamped<uint32_t>(
+      mRaceDelay, StaticPrefs::network_http_rcwn_min_wait_before_racing_ms(),
+      StaticPrefs::network_http_rcwn_max_wait_before_racing_ms());
+
+  MOZ_ASSERT(StaticPrefs::network_http_rcwn_enabled() || mNetworkTriggerDelay,
+             "The pref must be turned on.");
+  LOG(("nsHttpChannel::MaybeRaceCacheWithNetwork [this=%p, delay=%u]\n", this,
+       mRaceDelay));
+
+  TriggerNetworkWithDelay(mRaceDelay);
+}
+
+NS_IMETHODIMP
+nsHttpChannel::Test_triggerNetwork(int32_t aTimeout) {
+  LOG(("nsHttpChannel::Test_triggerNetwork this=%p timeout=%d", this,
+       aTimeout));
+  MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread");
+
+  // We set the trigger delay to the specified timeout.
+  mRaceCacheWithNetwork = true;
+  mNetworkTriggerDelay = aTimeout;
+
+  // If we already have a timer, set the delay/
+  if (mNetworkTriggerTimer) {
+    // If the timeout is 0 and there is a timer, we can trigger
+    // the network immediately.
+    MOZ_ASSERT(LoadWasOpened(), "Must have been opened before");
+    if (!aTimeout) {
+      return TriggerNetwork();
+    }
+    mNetworkTriggerTimer->SetDelay(aTimeout);
+  }
+  return NS_OK;
+}
+
+nsHttpChannel::TimerCallback::TimerCallback(nsHttpChannel* aChannel)
+    : mChannel(aChannel) {}
+
+NS_IMPL_ISUPPORTS(nsHttpChannel::TimerCallback, nsITimerCallback, nsINamed)
+
+NS_IMETHODIMP
+nsHttpChannel::TimerCallback::GetName(nsACString& aName) {
+  aName.AssignLiteral("nsHttpChannel");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::TimerCallback::Notify(nsITimer* aTimer) {
+  if (aTimer == mChannel->mCacheOpenTimer) {
+    return mChannel->Test_triggerDelayedOpenCacheEntry();
+  }
+  if (aTimer == mChannel->mNetworkTriggerTimer) {
+    return mChannel->TriggerNetwork();
+  }
+  MOZ_CRASH("Unknown timer");
+
+  return NS_OK;
+}
+
+bool nsHttpChannel::EligibleForTailing() {
+  if (!(mClassOfService.Flags() & nsIClassOfService::Tail)) {
+    return false;
+  }
+
+  if (mClassOfService.Flags() &
+      (nsIClassOfService::UrgentStart | nsIClassOfService::Leader |
+       nsIClassOfService::TailForbidden)) {
+    return false;
+  }
+
+  if (mClassOfService.Flags() & nsIClassOfService::Unblocked &&
+      !(mClassOfService.Flags() & nsIClassOfService::TailAllowed)) {
+    return false;
+  }
+
+  if (IsNavigation()) {
+    return false;
+  }
+
+  return true;
+}
+
+bool nsHttpChannel::WaitingForTailUnblock() {
+  nsresult rv;
+
+  if (!gHttpHandler->IsTailBlockingEnabled()) {
+    LOG(("nsHttpChannel %p tail-blocking disabled", this));
+    return false;
+  }
+
+  if (!EligibleForTailing()) {
+    LOG(("nsHttpChannel %p not eligible for tail-blocking", this));
+    AddAsNonTailRequest();
+    return false;
+  }
+
+  if (!EnsureRequestContext()) {
+    LOG(("nsHttpChannel %p no request context", this));
+    return false;
+  }
+
+  LOG(("nsHttpChannel::WaitingForTailUnblock this=%p, rc=%p", this,
+       mRequestContext.get()));
+
+  bool blocked;
+  rv = mRequestContext->IsContextTailBlocked(this, &blocked);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+
+  LOG(("  blocked=%d", blocked));
+
+  return blocked;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpChannel::nsIRequestTailUnblockCallback
+//-----------------------------------------------------------------------------
+
+// Must be implemented in the leaf class because we don't have
+// AsyncAbort in HttpBaseChannel.
+NS_IMETHODIMP
+nsHttpChannel::OnTailUnblock(nsresult rv) {
+  LOG(("nsHttpChannel::OnTailUnblock this=%p rv=%" PRIx32 " rc=%p", this,
+       static_cast<uint32_t>(rv), mRequestContext.get()));
+
+  MOZ_RELEASE_ASSERT(mOnTailUnblock);
+
+  if (NS_FAILED(mStatus)) {
+    rv = mStatus;
+  }
+
+  if (NS_SUCCEEDED(rv)) {
+    auto callback = mOnTailUnblock;
+    mOnTailUnblock = nullptr;
+    rv = (this->*callback)();
+  }
+
+  if (NS_FAILED(rv)) {
+    CloseCacheEntry(false);
+    return AsyncAbort(rv);
+  }
+
+  return NS_OK;
+}
+
+void nsHttpChannel::SetWarningReporter(
+    HttpChannelSecurityWarningReporter* aReporter) {
+  LOG(("nsHttpChannel [this=%p] SetWarningReporter [%p]", this, aReporter));
+  mWarningReporter = aReporter;
+}
+
+HttpChannelSecurityWarningReporter* nsHttpChannel::GetWarningReporter() {
+  LOG(("nsHttpChannel [this=%p] GetWarningReporter [%p]", this,
+       mWarningReporter.get()));
+  return mWarningReporter.get();
+}
+
+// The specification for ORB is currently being written:
+// https://whatpr.org/fetch/1442.html#orb-algorithm
+// The `opaque-response-safelist check` is implemented in:
+// * `HttpBaseChannel::PerformOpaqueResponseSafelistCheckBeforeSniff`
+// * `nsHttpChannel::DisableIsOpaqueResponseAllowedAfterSniffCheck`
+// * `HttpBaseChannel::PerformOpaqueResponseSafelistCheckAfterSniff`
+// * `OpaqueResponseBlocker::ValidateJavaScript`
+//
+// Should only be called by nsMediaSniffer::GetMIMETypeFromContent and
+// imageLoader::GetMIMETypeFromContent when the content type can be
+// recognized by these sniffers.
+void nsHttpChannel::DisableIsOpaqueResponseAllowedAfterSniffCheck(
+    SnifferType aType) {
+  // https://whatpr.org/fetch/1442.html#orb-algorithm
+  // This method covers steps, 8 and 10.
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  if (NeedOpaqueResponseAllowedCheckAfterSniff()) {
+    MOZ_ASSERT(mCachedOpaqueResponseBlockingPref);
+
+    // If the sniffer type is media and the request comes from a media element,
+    // we would like to check:
+    // - Whether the information provided by the media element shows it's an
+    // initial request.
+    // - Whether the response's status is either 200 or 206.
+    //
+    // If any of the results is false, then we set
+    // mBlockOpaqueResponseAfterSniff to true and block the response later.
+    if (aType == SnifferType::Media) {
+      // Step 8
+      MOZ_ASSERT(mLoadInfo);
+
+      bool isMediaRequest;
+      mLoadInfo->GetIsMediaRequest(&isMediaRequest);
+      if (isMediaRequest) {
+        bool isInitialRequest;
+        mLoadInfo->GetIsMediaInitialRequest(&isInitialRequest);
+        MOZ_ASSERT(isInitialRequest);
+
+        if (!isInitialRequest) {
+          // Step 8.1
+          BlockOpaqueResponseAfterSniff(
+              u"media request after sniffing, but not initial request"_ns,
+              OpaqueResponseBlockedTelemetryReason::MEDIA_NOT_INITIAL);
+          return;
+        }
+
+        if (mResponseHead->Status() != 200 && mResponseHead->Status() != 206) {
+          // Step 8.2
+          BlockOpaqueResponseAfterSniff(
+              u"media request's response status is neither 200 nor 206"_ns,
+              OpaqueResponseBlockedTelemetryReason::MEDIA_INCORRECT_RESP);
+          return;
+        }
+      }
+    }
+
+    // Step 8.3 if `aType == SnifferType::Media`
+    // Step 9 can be skipped, only `HTMLMediaElement` ever sets isMediaRequest.
+    // Step 10 if `aType == SnifferType::Image`
+    AllowOpaqueResponseAfterSniff();
+  }
+}
+
+namespace {
+
+class CopyNonDefaultHeaderVisitor final : public nsIHttpHeaderVisitor {
+  nsCOMPtr<nsIHttpChannel> mTarget;
+
+  ~CopyNonDefaultHeaderVisitor() = default;
+
+  NS_IMETHOD
+  VisitHeader(const nsACString& aHeader, const nsACString& aValue) override {
+    if (aValue.IsEmpty()) {
+      return mTarget->SetEmptyRequestHeader(aHeader);
+    }
+    return mTarget->SetRequestHeader(aHeader, aValue, false /* merge */);
+  }
+
+ public:
+  explicit CopyNonDefaultHeaderVisitor(nsIHttpChannel* aTarget)
+      : mTarget(aTarget) {
+    MOZ_DIAGNOSTIC_ASSERT(mTarget);
+  }
+
+  NS_DECL_ISUPPORTS
+};
+
+NS_IMPL_ISUPPORTS(CopyNonDefaultHeaderVisitor, nsIHttpHeaderVisitor)
+
+}  // anonymous namespace
+
+nsresult nsHttpChannel::RedirectToInterceptedChannel() {
+  nsCOMPtr<nsINetworkInterceptController> controller;
+  GetCallback(controller);
+
+  RefPtr<InterceptedHttpChannel> intercepted =
+      InterceptedHttpChannel::CreateForInterception(
+          mChannelCreationTime, mChannelCreationTimestamp, mAsyncOpenTime);
+
+  ExtContentPolicyType type = mLoadInfo->GetExternalContentPolicyType();
+
+  nsCOMPtr<nsILoadInfo> redirectLoadInfo =
+      CloneLoadInfoForRedirect(mURI, nsIChannelEventSink::REDIRECT_INTERNAL);
+
+  nsresult rv = intercepted->Init(
+      mURI, mCaps, static_cast<nsProxyInfo*>(mProxyInfo.get()),
+      mProxyResolveFlags, mProxyURI, mChannelId, type, redirectLoadInfo);
+
+  rv = SetupReplacementChannel(mURI, intercepted, true,
+                               nsIChannelEventSink::REDIRECT_INTERNAL);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Some APIs, like fetch(), allow content to set non-standard headers.
+  // Normally these APIs are responsible for copying these headers across
+  // redirects.  In the e10s parent-side intercept case, though, we currently
+  // "hide" the internal redirect to the InterceptedHttpChannel.  So the
+  // fetch() API does not have the opportunity to move headers over.
+  // Therefore, we do it automatically here.
+  //
+  // Once child-side interception is removed and the internal redirect no
+  // longer needs to be "hidden", then this header copying code can be
+  // removed.
+  nsCOMPtr<nsIHttpHeaderVisitor> visitor =
+      new CopyNonDefaultHeaderVisitor(intercepted);
+  rv = VisitNonDefaultRequestHeaders(visitor);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  mRedirectChannel = intercepted;
+
+  PushRedirectAsyncFunc(&nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+
+  rv = gHttpHandler->AsyncOnChannelRedirect(
+      this, intercepted, nsIChannelEventSink::REDIRECT_INTERNAL);
+
+  if (NS_SUCCEEDED(rv)) {
+    rv = WaitForRedirectCallback();
+  }
+
+  if (NS_FAILED(rv)) {
+    AutoRedirectVetoNotifier notifier(this, rv);
+
+    PopRedirectAsyncFunc(&nsHttpChannel::ContinueAsyncRedirectChannelToURI);
+  }
+
+  return rv;
+}
+
+void nsHttpChannel::ReEvaluateReferrerAfterTrackingStatusIsKnown() {
+  nsCOMPtr<nsICookieJarSettings> cjs;
+  if (mLoadInfo) {
+    Unused << mLoadInfo->GetCookieJarSettings(getter_AddRefs(cjs));
+  }
+  if (!cjs) {
+    cjs = net::CookieJarSettings::Create(mLoadInfo->GetLoadingPrincipal());
+  }
+  if (cjs->GetRejectThirdPartyContexts()) {
+    bool isPrivate = mLoadInfo->GetOriginAttributes().mPrivateBrowsingId > 0;
+    // If our referrer has been set before, and our referrer policy is unset
+    // (default policy) if we thought the channel wasn't a third-party
+    // tracking channel, we may need to set our referrer with referrer policy
+    // once again to ensure our defaults properly take effect now.
+    if (mReferrerInfo) {
+      ReferrerInfo* referrerInfo =
+          static_cast<ReferrerInfo*>(mReferrerInfo.get());
+
+      if (referrerInfo->IsPolicyOverrided() &&
+          referrerInfo->ReferrerPolicy() ==
+              ReferrerInfo::GetDefaultReferrerPolicy(nullptr, nullptr,
+                                                     isPrivate)) {
+        nsCOMPtr<nsIReferrerInfo> newReferrerInfo =
+            referrerInfo->CloneWithNewPolicy(
+                ReferrerInfo::GetDefaultReferrerPolicy(this, mURI, isPrivate));
+        // The arguments passed to SetReferrerInfoInternal here should mirror
+        // the arguments passed in
+        // HttpChannelChild::RecvOverrideReferrerInfoDuringBeginConnect().
+        SetReferrerInfoInternal(newReferrerInfo, false, true, true);
+
+        nsCOMPtr<nsIParentChannel> parentChannel;
+        NS_QueryNotificationCallbacks(this, parentChannel);
+        RefPtr<HttpChannelParent> httpParent = do_QueryObject(parentChannel);
+        if (httpParent) {
+          httpParent->OverrideReferrerInfoDuringBeginConnect(newReferrerInfo);
+        }
+      }
+    }
+  }
+}
+
+namespace {
+
+class BackgroundRevalidatingListener : public nsIStreamListener {
+  NS_DECL_ISUPPORTS
+
+  NS_DECL_NSISTREAMLISTENER
+  NS_DECL_NSIREQUESTOBSERVER
+
+ private:
+  virtual ~BackgroundRevalidatingListener() = default;
+};
+
+NS_IMETHODIMP
+BackgroundRevalidatingListener::OnStartRequest(nsIRequest* request) {
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+BackgroundRevalidatingListener::OnDataAvailable(nsIRequest* request,
+                                                nsIInputStream* input,
+                                                uint64_t offset,
+                                                uint32_t count) {
+  uint32_t bytesRead = 0;
+  return input->ReadSegments(NS_DiscardSegment, nullptr, count, &bytesRead);
+}
+
+NS_IMETHODIMP
+BackgroundRevalidatingListener::OnStopRequest(nsIRequest* request,
+                                              nsresult status) {
+  if (NS_FAILED(status)) {
+    return status;
+  }
+
+  nsCOMPtr<nsIHttpChannel> channel(do_QueryInterface(request));
+  if (gHttpHandler) {
+    gHttpHandler->OnBackgroundRevalidation(channel);
+  }
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(BackgroundRevalidatingListener, nsIStreamListener,
+                  nsIRequestObserver)
+
+}  // namespace
+
+void nsHttpChannel::PerformBackgroundCacheRevalidation() {
+  if (!StaticPrefs::network_http_stale_while_revalidate_enabled()) {
+    return;
+  }
+
+  // This is a channel doing a revalidation. It shouldn't do it again.
+  if (mStaleRevalidation) {
+    return;
+  }
+
+  LOG(("nsHttpChannel::PerformBackgroundCacheRevalidation %p", this));
+
+  Unused << NS_DispatchToMainThreadQueue(
+      NewIdleRunnableMethod(
+          "nsHttpChannel::PerformBackgroundCacheRevalidation", this,
+          &nsHttpChannel::PerformBackgroundCacheRevalidationNow),
+      EventQueuePriority::Idle);
+}
+
+void nsHttpChannel::PerformBackgroundCacheRevalidationNow() {
+  LOG(("nsHttpChannel::PerformBackgroundCacheRevalidationNow %p", this));
+
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsresult rv;
+
+  nsLoadFlags loadFlags = mLoadFlags | LOAD_ONLY_IF_MODIFIED | VALIDATE_ALWAYS |
+                          LOAD_BACKGROUND | LOAD_BYPASS_SERVICE_WORKER;
+
+  nsCOMPtr<nsIChannel> validatingChannel;
+  rv = NS_NewChannelInternal(getter_AddRefs(validatingChannel), mURI, mLoadInfo,
+                             nullptr /* performance storage */, mLoadGroup,
+                             mCallbacks, loadFlags);
+  if (NS_FAILED(rv)) {
+    LOG(("  failed to created the channel, rv=0x%08x",
+         static_cast<uint32_t>(rv)));
+    return;
+  }
+
+  nsCOMPtr<nsISupportsPriority> priority(do_QueryInterface(validatingChannel));
+  if (priority) {
+    priority->SetPriority(nsISupportsPriority::PRIORITY_LOWEST);
+  }
+
+  nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(validatingChannel));
+  if (cos) {
+    cos->AddClassFlags(nsIClassOfService::Tail);
+  }
+
+  RefPtr<nsHttpChannel> httpChan = do_QueryObject(validatingChannel);
+  if (httpChan) {
+    httpChan->mStaleRevalidation = true;
+  }
+
+  RefPtr<BackgroundRevalidatingListener> listener =
+      new BackgroundRevalidatingListener();
+  rv = validatingChannel->AsyncOpen(listener);
+  if (NS_FAILED(rv)) {
+    LOG(("  failed to open the channel, rv=0x%08x", static_cast<uint32_t>(rv)));
+    return;
+  }
+
+  LOG(("  %p is re-validating with a new channel %p", this,
+       validatingChannel.get()));
+}
+
+NS_IMETHODIMP
+nsHttpChannel::SetEarlyHintObserver(nsIEarlyHintObserver* aObserver) {
+  mEarlyHintObserver = aObserver;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsHttpChannel::EarlyHint(const nsACString& aLinkHeader,
+                         const nsACString& aReferrerPolicy,
+                         const nsACString& aCspHeader) {
+  LOG(("nsHttpChannel::EarlyHint.\n"));
+
+  if (mEarlyHintObserver && nsContentUtils::ComputeIsSecureContext(this)) {
+    LOG(("nsHttpChannel::EarlyHint propagated.\n"));
+    mEarlyHintObserver->EarlyHint(aLinkHeader, aReferrerPolicy, aCspHeader);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsHttpChannel::SetWebTransportSessionEventListener(
+    WebTransportSessionEventListener* aListener) {
+  mWebTransportSessionEventListener = aListener;
+  return NS_OK;
+}
+
+already_AddRefed<WebTransportSessionEventListener>
+nsHttpChannel::GetWebTransportSessionEventListener() {
+  RefPtr<WebTransportSessionEventListener> wt =
+      mWebTransportSessionEventListener;
+  return wt.forget();
+}
+
+}  // namespace net
+}  // namespace mozilla