Remove support and tests for HSTS priming from the tree. Fixes #384

14 files changed, 6 insertions, 680 deletions

diff --git a/netwerk/base/LoadInfo.cpp b/netwerk/base/LoadInfo.cpp
index ede825b8f..a8c9a5a25 100644
--- a/netwerk/base/LoadInfo.cpp
+++ b/netwerk/base/LoadInfo.cpp
@@ -67,8 +67,6 @@ LoadInfo::LoadInfo(nsIPrincipal* aLoadingPrincipal,
   , mForcePreflight(false)
   , mIsPreflight(false)
   , mLoadTriggeredFromExternal(false)
-  , mForceHSTSPriming(false)
-  , mMixedContentWouldBlock(false)
 {
   MOZ_ASSERT(mLoadingPrincipal);
   MOZ_ASSERT(mTriggeringPrincipal);
@@ -243,8 +241,6 @@ LoadInfo::LoadInfo(nsPIDOMWindowOuter* aOuterWindow,
   , mForcePreflight(false)
   , mIsPreflight(false)
   , mLoadTriggeredFromExternal(false)
-  , mForceHSTSPriming(false)
-  , mMixedContentWouldBlock(false)
 {
   // Top-level loads are never third-party
   // Grab the information we can out of the window.
@@ -308,8 +304,6 @@ LoadInfo::LoadInfo(const LoadInfo& rhs)
   , mForcePreflight(rhs.mForcePreflight)
   , mIsPreflight(rhs.mIsPreflight)
   , mLoadTriggeredFromExternal(rhs.mLoadTriggeredFromExternal)
-  , mForceHSTSPriming(rhs.mForceHSTSPriming)
-  , mMixedContentWouldBlock(rhs.mMixedContentWouldBlock)
 {
 }
 
@@ -337,9 +331,7 @@ LoadInfo::LoadInfo(nsIPrincipal* aLoadingPrincipal,
                    const nsTArray<nsCString>& aCorsUnsafeHeaders,
                    bool aForcePreflight,
                    bool aIsPreflight,
-                   bool aLoadTriggeredFromExternal,
-                   bool aForceHSTSPriming,
-                   bool aMixedContentWouldBlock)
+                   bool aLoadTriggeredFromExternal)
   : mLoadingPrincipal(aLoadingPrincipal)
   , mTriggeringPrincipal(aTriggeringPrincipal)
   , mPrincipalToInherit(aPrincipalToInherit)
@@ -363,8 +355,6 @@ LoadInfo::LoadInfo(nsIPrincipal* aLoadingPrincipal,
   , mForcePreflight(aForcePreflight)
   , mIsPreflight(aIsPreflight)
   , mLoadTriggeredFromExternal(aLoadTriggeredFromExternal)
-  , mForceHSTSPriming (aForceHSTSPriming)
-  , mMixedContentWouldBlock(aMixedContentWouldBlock)
 {
   // Only top level TYPE_DOCUMENT loads can have a null loadingPrincipal
   MOZ_ASSERT(mLoadingPrincipal || aContentPolicyType == nsIContentPolicy::TYPE_DOCUMENT);
@@ -933,34 +923,6 @@ LoadInfo::GetLoadTriggeredFromExternal(bool* aLoadTriggeredFromExternal)
 }
 
 NS_IMETHODIMP
-LoadInfo::GetForceHSTSPriming(bool* aForceHSTSPriming)
-{
-  *aForceHSTSPriming = mForceHSTSPriming;
-  return NS_OK;
-}
-
-NS_IMETHODIMP
-LoadInfo::GetMixedContentWouldBlock(bool *aMixedContentWouldBlock)
-{
-  *aMixedContentWouldBlock = mMixedContentWouldBlock;
-  return NS_OK;
-}
-
-void
-LoadInfo::SetHSTSPriming(bool aMixedContentWouldBlock)
-{
-  mForceHSTSPriming = true;
-  mMixedContentWouldBlock = aMixedContentWouldBlock;
-}
-
-void
-LoadInfo::ClearHSTSPriming()
-{
-  mForceHSTSPriming = false;
-  mMixedContentWouldBlock = false;
-}
-
-NS_IMETHODIMP
 LoadInfo::GetTainting(uint32_t* aTaintingOut)
 {
   MOZ_ASSERT(aTaintingOut);
diff --git a/netwerk/base/LoadInfo.h b/netwerk/base/LoadInfo.h
index 0ae6061b3..2b1e8c9e8 100644
--- a/netwerk/base/LoadInfo.h
+++ b/netwerk/base/LoadInfo.h
@@ -111,9 +111,7 @@ private:
            const nsTArray<nsCString>& aUnsafeHeaders,
            bool aForcePreflight,
            bool aIsPreflight,
-           bool aLoadTriggeredFromExternal,
-           bool aForceHSTSPriming,
-           bool aMixedContentWouldBlock);
+           bool aLoadTriggeredFromExternal);
   LoadInfo(const LoadInfo& rhs);
 
   friend nsresult
@@ -159,9 +157,6 @@ private:
   bool                             mForcePreflight;
   bool                             mIsPreflight;
   bool                             mLoadTriggeredFromExternal;
-
-  bool                             mForceHSTSPriming : 1;
-  bool                             mMixedContentWouldBlock : 1;
 };
 
 } // namespace net
diff --git a/netwerk/base/nsILoadInfo.idl b/netwerk/base/nsILoadInfo.idl
index 4ec29b972..9a883ff98 100644
--- a/netwerk/base/nsILoadInfo.idl
+++ b/netwerk/base/nsILoadInfo.idl
@@ -671,32 +671,6 @@ interface nsILoadInfo : nsISupports
   [infallible] readonly attribute boolean isPreflight;
 
   /**
-   * When this request would be mixed-content and we do not have an
-   * entry in the HSTS cache, we send an HSTS priming request to
-   * determine if it is ok to upgrade the request to HTTPS.
-   */
-  /**
-   * True if this is a mixed-content load and HSTS priming request will be sent.
-   */
-  [noscript, infallible] readonly attribute boolean forceHSTSPriming;
-  /**
-   * Carry the decision whether this load would be blocked by mixed content so
-   * that if HSTS priming fails, the correct decision can be made.
-   */
-  [noscript, infallible] readonly attribute boolean mixedContentWouldBlock;
-
-  /**
-   * Mark this LoadInfo as needing HSTS Priming
-   *
-   * @param wouldBlock Carry the decision of Mixed Content Blocking to be
-   * applied when HSTS priming is complete.
-   */
-  [noscript, notxpcom, nostdcall]
-  void setHSTSPriming(in boolean mixeContentWouldBlock);
-  [noscript, notxpcom, nostdcall]
-  void clearHSTSPriming();
-
-  /**
   * Constants reflecting the channel tainting.  These are mainly defined here
   * for script.  Internal C++ code should use the enum defined in LoadTainting.h.
   * See LoadTainting.h for documentation.
diff --git a/netwerk/ipc/NeckoChannelParams.ipdlh b/netwerk/ipc/NeckoChannelParams.ipdlh
index bb7562c64..2633ef608 100644
--- a/netwerk/ipc/NeckoChannelParams.ipdlh
+++ b/netwerk/ipc/NeckoChannelParams.ipdlh
@@ -56,8 +56,6 @@ struct LoadInfoArgs
   bool                  forcePreflight;
   bool                  isPreflight;
   bool                  loadTriggeredFromExternal;
-  bool                  forceHSTSPriming;
-  bool                  mixedContentWouldBlock;
 };
 
 /**
diff --git a/netwerk/protocol/http/HSTSPrimerListener.cpp b/netwerk/protocol/http/HSTSPrimerListener.cpp
deleted file mode 100644
index 8c9d28d36..000000000
--- a/netwerk/protocol/http/HSTSPrimerListener.cpp
+++ /dev/null
@@ -1,273 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "nsHttp.h"
-
-#include "HSTSPrimerListener.h"
-#include "nsIHstsPrimingCallback.h"
-#include "nsIPrincipal.h"
-#include "nsSecurityHeaderParser.h"
-#include "nsISiteSecurityService.h"
-#include "nsISocketProvider.h"
-#include "nsISSLStatus.h"
-#include "nsISSLStatusProvider.h"
-#include "nsStreamUtils.h"
-#include "nsHttpChannel.h"
-#include "LoadInfo.h"
-
-namespace mozilla {
-namespace net {
-
-using namespace mozilla;
-
-NS_IMPL_ISUPPORTS(HSTSPrimingListener, nsIStreamListener,
-                  nsIRequestObserver, nsIInterfaceRequestor)
-
-NS_IMETHODIMP
-HSTSPrimingListener::GetInterface(const nsIID & aIID, void **aResult)
-{
-  return QueryInterface(aIID, aResult);
-}
-
-NS_IMETHODIMP
-HSTSPrimingListener::OnStartRequest(nsIRequest *aRequest,
-                                    nsISupports *aContext)
-{
-  nsresult primingResult = CheckHSTSPrimingRequestStatus(aRequest);
-  nsCOMPtr<nsIHstsPrimingCallback> callback(mCallback);
-  mCallback = nullptr;
-
-  nsCOMPtr<nsITimedChannel> timingChannel =
-    do_QueryInterface(callback);
-  if (timingChannel) {
-    TimeStamp channelCreationTime;
-    nsresult rv = timingChannel->GetChannelCreation(&channelCreationTime);
-    if (NS_SUCCEEDED(rv) && !channelCreationTime.IsNull()) {
-      PRUint32 interval =
-        (PRUint32) (TimeStamp::Now() - channelCreationTime).ToMilliseconds();
-      Telemetry::Accumulate(Telemetry::HSTS_PRIMING_REQUEST_DURATION,
-          (NS_SUCCEEDED(primingResult)) ? NS_LITERAL_CSTRING("success")
-                                        : NS_LITERAL_CSTRING("failure"),
-          interval);
-    }
-  }
-
-  if (NS_FAILED(primingResult)) {
-    LOG(("HSTS Priming Failed (request was not approved)"));
-    return callback->OnHSTSPrimingFailed(primingResult, false);
-  }
-
-  LOG(("HSTS Priming Succeeded (request was approved)"));
-  return callback->OnHSTSPrimingSucceeded(false);
-}
-
-NS_IMETHODIMP
-HSTSPrimingListener::OnStopRequest(nsIRequest *aRequest,
-                                   nsISupports *aContext,
-                                   nsresult aStatus)
-{
-  return NS_OK;
-}
-
-nsresult
-HSTSPrimingListener::CheckHSTSPrimingRequestStatus(nsIRequest* aRequest)
-{
-  nsresult status;
-  nsresult rv = aRequest->GetStatus(&status);
-  NS_ENSURE_SUCCESS(rv, rv);
-  if (NS_FAILED(status)) {
-    return NS_ERROR_CONTENT_BLOCKED;
-  }
-
-  // Test that things worked on a HTTP level
-  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aRequest);
-  NS_ENSURE_STATE(httpChannel);
-  nsCOMPtr<nsIHttpChannelInternal> internal = do_QueryInterface(aRequest);
-  NS_ENSURE_STATE(internal);
-
-  bool succeedded;
-  rv = httpChannel->GetRequestSucceeded(&succeedded);
-  if (NS_FAILED(rv) || !succeedded) {
-    // If the request did not return a 2XX response, don't process it
-    return NS_ERROR_CONTENT_BLOCKED;
-  }
-
-  bool synthesized = false;
-  nsHttpChannel* rawHttpChannel = static_cast<nsHttpChannel*>(httpChannel.get());
-  rv = rawHttpChannel->GetResponseSynthesized(&synthesized);
-  NS_ENSURE_SUCCESS(rv, rv);
-  if (synthesized) {
-    // Don't consider synthesized responses
-    return NS_ERROR_CONTENT_BLOCKED;
-  }
-
-  // check to see if the HSTS cache was updated
-  nsCOMPtr<nsISiteSecurityService> sss = do_GetService(NS_SSSERVICE_CONTRACTID, &rv);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsCOMPtr<nsIURI> uri;
-  rv = httpChannel->GetURI(getter_AddRefs(uri));
-  NS_ENSURE_SUCCESS(rv, rv);
-  NS_ENSURE_TRUE(uri, NS_ERROR_CONTENT_BLOCKED);
-
-  bool hsts;
-  rv = sss->IsSecureURI(nsISiteSecurityService::HEADER_HSTS, uri, 0, nullptr, &hsts);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  if (hsts) {
-    // An HSTS upgrade was found
-    return NS_OK;
-  }
-
-  // There is no HSTS upgrade available
-  return NS_ERROR_CONTENT_BLOCKED;
-}
-
-/** nsIStreamListener methods **/
-
-NS_IMETHODIMP
-HSTSPrimingListener::OnDataAvailable(nsIRequest *aRequest,
-                                     nsISupports *ctxt,
-                                     nsIInputStream *inStr,
-                                     uint64_t sourceOffset,
-                                     uint32_t count)
-{
-  uint32_t totalRead;
-  return inStr->ReadSegments(NS_DiscardSegment, nullptr, count, &totalRead);
-}
-
-// static
-nsresult
-HSTSPrimingListener::StartHSTSPriming(nsIChannel* aRequestChannel,
-                                      nsIHstsPrimingCallback* aCallback)
-{
-
-  nsCOMPtr<nsIURI> finalChannelURI;
-  nsresult rv = NS_GetFinalChannelURI(aRequestChannel, getter_AddRefs(finalChannelURI));
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsCOMPtr<nsIURI> uri;
-  rv = NS_GetSecureUpgradedURI(finalChannelURI, getter_AddRefs(uri));
-  NS_ENSURE_SUCCESS(rv,rv);
-
-  // check the HSTS cache
-  bool hsts;
-  bool cached;
-  nsCOMPtr<nsISiteSecurityService> sss = do_GetService(NS_SSSERVICE_CONTRACTID, &rv);
-  NS_ENSURE_SUCCESS(rv, rv);
-  rv = sss->IsSecureURI(nsISiteSecurityService::HEADER_HSTS, uri, 0, &cached, &hsts);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  if (hsts) {
-    // already saw this host and will upgrade if allowed by preferences
-    return aCallback->OnHSTSPrimingSucceeded(true);
-  }
-
-  if (cached) {
-    // there is a non-expired entry in the cache that doesn't allow us to
-    // upgrade, so go ahead and fail early.
-    return aCallback->OnHSTSPrimingFailed(NS_ERROR_CONTENT_BLOCKED, true);
-  }
-
-  // Either it wasn't cached or the cached result has expired. Build a
-  // channel for the HEAD request.
-
-  nsCOMPtr<nsILoadInfo> originalLoadInfo = aRequestChannel->GetLoadInfo();
-  MOZ_ASSERT(originalLoadInfo, "can not perform HSTS priming without a loadInfo");
-  if (!originalLoadInfo) {
-    return NS_ERROR_FAILURE;
-  }
-
-  nsCOMPtr<nsILoadInfo> loadInfo = static_cast<mozilla::LoadInfo*>
-    (originalLoadInfo.get())->CloneForNewRequest();
-
-  // the LoadInfo must have a security flag set in order to pass through priming
-  // if none of these security flags are set, go ahead and fail now instead of
-  // crashing in nsContentSecurityManager::ValidateSecurityFlags
-  nsSecurityFlags securityMode = loadInfo->GetSecurityMode();
-  if (securityMode != nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS &&
-      securityMode != nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED &&
-      securityMode != nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS &&
-      securityMode != nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL &&
-      securityMode != nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS) {
-    return aCallback->OnHSTSPrimingFailed(NS_ERROR_CONTENT_BLOCKED, true);
-  }
-
-  nsCOMPtr<nsILoadGroup> loadGroup;
-  rv = aRequestChannel->GetLoadGroup(getter_AddRefs(loadGroup));
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsLoadFlags loadFlags;
-  rv = aRequestChannel->GetLoadFlags(&loadFlags);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  loadFlags &= HttpBaseChannel::INHIBIT_CACHING |
-               HttpBaseChannel::INHIBIT_PERSISTENT_CACHING |
-               HttpBaseChannel::LOAD_BYPASS_CACHE |
-               HttpBaseChannel::LOAD_FROM_CACHE |
-               HttpBaseChannel::VALIDATE_ALWAYS;
-  // Priming requests should never be intercepted by service workers and
-  // are always anonymous.
-  loadFlags |= nsIChannel::LOAD_BYPASS_SERVICE_WORKER |
-               nsIRequest::LOAD_ANONYMOUS;
-
-  // Create a new channel to send the priming request
-  nsCOMPtr<nsIChannel> primingChannel;
-  rv = NS_NewChannelInternal(getter_AddRefs(primingChannel),
-                             uri,
-                             loadInfo,
-                             loadGroup,
-                             nullptr,   // aCallbacks are set later
-                             loadFlags);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  // Set method and headers
-  nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(primingChannel);
-  if (!httpChannel) {
-    NS_ERROR("HSTSPrimingListener: Failed to QI to nsIHttpChannel!");
-    return NS_ERROR_FAILURE;
-  }
-
-  // Currently using HEAD per the draft, but under discussion to change to GET
-  // with credentials so if the upgrade is approved the result is already cached.
-  rv = httpChannel->SetRequestMethod(NS_LITERAL_CSTRING("HEAD"));
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  rv = httpChannel->
-    SetRequestHeader(NS_LITERAL_CSTRING("Upgrade-Insecure-Requests"),
-                     NS_LITERAL_CSTRING("1"), false);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  // attempt to set the class of service flags on the new channel
-  nsCOMPtr<nsIClassOfService> requestClass = do_QueryInterface(aRequestChannel);
-  if (!requestClass) {
-    NS_ERROR("HSTSPrimingListener: aRequestChannel is not an nsIClassOfService");
-    return NS_ERROR_FAILURE;
-  }
-  nsCOMPtr<nsIClassOfService> primingClass = do_QueryInterface(httpChannel);
-  if (!primingClass) {
-    NS_ERROR("HSTSPrimingListener: aRequestChannel is not an nsIClassOfService");
-    return NS_ERROR_FAILURE;
-  }
-
-  uint32_t classFlags = 0;
-  rv = requestClass ->GetClassFlags(&classFlags);
-  NS_ENSURE_SUCCESS(rv, rv);
-  rv = primingClass->SetClassFlags(classFlags);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  // Set up listener which will start the original channel
-  nsCOMPtr<nsIStreamListener> primingListener(new HSTSPrimingListener(aCallback));
-
-  // Start priming
-  rv = primingChannel->AsyncOpen2(primingListener);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  return NS_OK;
-}
-
-} // namespace net
-} // namespace mozilla
diff --git a/netwerk/protocol/http/HSTSPrimerListener.h b/netwerk/protocol/http/HSTSPrimerListener.h
deleted file mode 100644
index 05089911b..000000000
--- a/netwerk/protocol/http/HSTSPrimerListener.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef HSTSPrimingListener_h__
-#define HSTSPrimingListener_h__
-
-#include "nsCOMPtr.h"
-#include "nsIChannelEventSink.h"
-#include "nsIInterfaceRequestor.h"
-#include "nsIStreamListener.h"
-#include "nsIThreadRetargetableStreamListener.h"
-
-#include "mozilla/Attributes.h"
-
-class nsIPrincipal;
-class nsINetworkInterceptController;
-class nsIHstsPrimingCallback;
-
-namespace mozilla {
-namespace net {
-
-class HttpChannelParent;
-class nsHttpChannel;
-
-/*
- * How often do we get back an HSTS priming result which upgrades the connection to HTTPS?
- */
-enum HSTSPrimingResult {
-  // This site has been seen before and won't be upgraded
-  eHSTS_PRIMING_CACHED_NO_UPGRADE = 0,
-  // This site has been seen before and will be upgraded
-  eHSTS_PRIMING_CACHED_DO_UPGRADE = 1,
-  // This site has been seen before and will be blocked
-  eHSTS_PRIMING_CACHED_BLOCK      = 2,
-  // The request was already upgraded, probably through
-  // upgrade-insecure-requests
-  eHSTS_PRIMING_ALREADY_UPGRADED  = 3,
-  // HSTS priming is successful and the connection will be upgraded to HTTPS
-  eHSTS_PRIMING_SUCCEEDED         = 4,
-  // When priming succeeds, but preferences require preservation of the order
-  // of mixed-content and hsts, and mixed-content blocks the load
-  eHSTS_PRIMING_SUCCEEDED_BLOCK   = 5,
-  // When priming succeeds, but preferences require preservation of the order
-  // of mixed-content and hsts, and mixed-content allows the load over http
-  eHSTS_PRIMING_SUCCEEDED_HTTP    = 6,
-  // HSTS priming failed, and the load is blocked by mixed-content
-  eHSTS_PRIMING_FAILED_BLOCK      = 7,
-  // HSTS priming failed, and the load is allowed by mixed-content
-  eHSTS_PRIMING_FAILED_ACCEPT     = 8
-};
-
-//////////////////////////////////////////////////////////////////////////
-// Class used as streamlistener and notification callback when
-// doing the HEAD request for an HSTS Priming check. Needs to be an
-// nsIStreamListener in order to receive events from AsyncOpen2
-class HSTSPrimingListener final : public nsIStreamListener,
-                                  public nsIInterfaceRequestor
-{
-public:
-  explicit HSTSPrimingListener(nsIHstsPrimingCallback* aCallback)
-   : mCallback(aCallback)
-  {
-  }
-
-  NS_DECL_ISUPPORTS
-  NS_DECL_NSISTREAMLISTENER
-  NS_DECL_NSIREQUESTOBSERVER
-  NS_DECL_NSIINTERFACEREQUESTOR
-
-private:
-  ~HSTSPrimingListener() {}
-
-  // Only nsHttpChannel can invoke HSTS priming
-  friend class mozilla::net::nsHttpChannel;
-
-  /**
-   * Start the HSTS priming request. This will send an anonymous HEAD request to
-   * the URI aRequestChannel is attempting to load. On success, the new HSTS
-   * priming channel is allocated in aHSTSPrimingChannel.
-   *
-   * @param aRequestChannel the reference channel used to initialze the HSTS
-   *        priming channel
-   * @param aCallback the callback stored to handle the results of HSTS priming.
-   * @param aHSTSPrimingChannel if the new HSTS priming channel is allocated
-   *        successfully, it will be placed here.
-   */
-  static nsresult StartHSTSPriming(nsIChannel* aRequestChannel,
-                                   nsIHstsPrimingCallback* aCallback);
-
-  /**
-   * Given a request, return NS_OK if it has resulted in a cached HSTS update.
-   * We don't need to check for the header as that has already been done for us.
-   */
-  nsresult CheckHSTSPrimingRequestStatus(nsIRequest* aRequest);
-
-  /**
-   * the nsIHttpChannel to notify with the result of HSTS priming.
-   */
-  nsCOMPtr<nsIHstsPrimingCallback> mCallback;
-};
-
-
-}} // mozilla::net
-
-#endif // HSTSPrimingListener_h__
diff --git a/netwerk/protocol/http/HttpChannelChild.cpp b/netwerk/protocol/http/HttpChannelChild.cpp
index 6d09135c4..0a1e0f859 100644
--- a/netwerk/protocol/http/HttpChannelChild.cpp
+++ b/netwerk/protocol/http/HttpChannelChild.cpp
@@ -1681,8 +1681,8 @@ NS_IMETHODIMP
 HttpChannelChild::OnRedirectVerifyCallback(nsresult result)
 {
   LOG(("HttpChannelChild::OnRedirectVerifyCallback [this=%p]\n", this));
-  nsresult rv;
   OptionalURIParams redirectURI;
+  nsresult rv;
   nsCOMPtr<nsIHttpChannel> newHttpChannel =
       do_QueryInterface(mRedirectChannelChild);
 
@@ -1697,18 +1697,9 @@ HttpChannelChild::OnRedirectVerifyCallback(nsresult result)
     result = NS_ERROR_DOM_BAD_URI;
   }
 
-  bool forceHSTSPriming = false;
-  bool mixedContentWouldBlock = false;
   if (newHttpChannel) {
     // Must not be called until after redirect observers called.
     newHttpChannel->SetOriginalURI(mOriginalURI);
-
-    nsCOMPtr<nsILoadInfo> newLoadInfo;
-    rv = newHttpChannel->GetLoadInfo(getter_AddRefs(newLoadInfo));
-    if (NS_SUCCEEDED(rv) && newLoadInfo) {
-      forceHSTSPriming = newLoadInfo->GetForceHSTSPriming();
-      mixedContentWouldBlock = newLoadInfo->GetMixedContentWouldBlock();
-    }
   }
 
   if (mRedirectingForSubsequentSynthesizedResponse) {
@@ -1756,7 +1747,7 @@ HttpChannelChild::OnRedirectVerifyCallback(nsresult result)
       do_QueryInterface(mRedirectChannelChild);
     if (newHttpChannelInternal) {
       nsCOMPtr<nsIURI> apiRedirectURI;
-      nsresult rv = newHttpChannelInternal->GetApiRedirectToURI(
+      rv = newHttpChannelInternal->GetApiRedirectToURI(
         getter_AddRefs(apiRedirectURI));
       if (NS_SUCCEEDED(rv) && apiRedirectURI) {
         /* If there was an API redirect of this channel, we need to send it
@@ -1780,8 +1771,7 @@ HttpChannelChild::OnRedirectVerifyCallback(nsresult result)
 
   if (mIPCOpen)
     SendRedirect2Verify(result, *headerTuples, loadFlags, redirectURI,
-                        corsPreflightArgs, forceHSTSPriming,
-                        mixedContentWouldBlock, chooseAppcache);
+                        corsPreflightArgs, chooseAppcache);
 
   return NS_OK;
 }
diff --git a/netwerk/protocol/http/HttpChannelParent.cpp b/netwerk/protocol/http/HttpChannelParent.cpp
index 90ed597a6..d1c67f01b 100644
--- a/netwerk/protocol/http/HttpChannelParent.cpp
+++ b/netwerk/protocol/http/HttpChannelParent.cpp
@@ -733,8 +733,6 @@ HttpChannelParent::RecvRedirect2Verify(const nsresult& result,
                                        const uint32_t& loadFlags,
                                        const OptionalURIParams& aAPIRedirectURI,
                                        const OptionalCorsPreflightArgs& aCorsPreflightArgs,
-                                       const bool& aForceHSTSPriming,
-                                       const bool& aMixedContentWouldBlock,
                                        const bool& aChooseAppcache)
 {
   LOG(("HttpChannelParent::RecvRedirect2Verify [this=%p result=%x]\n",
@@ -774,14 +772,6 @@ HttpChannelParent::RecvRedirect2Verify(const nsresult& result,
         newInternalChannel->SetCorsPreflightParameters(args.unsafeHeaders());
       }
 
-      if (aForceHSTSPriming) {
-        nsCOMPtr<nsILoadInfo> newLoadInfo;
-        rv = newHttpChannel->GetLoadInfo(getter_AddRefs(newLoadInfo));
-        if (NS_SUCCEEDED(rv) && newLoadInfo) {
-          newLoadInfo->SetHSTSPriming(aMixedContentWouldBlock);
-        }
-      }
-
       nsCOMPtr<nsIApplicationCacheChannel> appCacheChannel =
         do_QueryInterface(newHttpChannel);
       if (appCacheChannel) {
diff --git a/netwerk/protocol/http/HttpChannelParent.h b/netwerk/protocol/http/HttpChannelParent.h
index 56854bb55..91f9bac8b 100644
--- a/netwerk/protocol/http/HttpChannelParent.h
+++ b/netwerk/protocol/http/HttpChannelParent.h
@@ -162,8 +162,6 @@ protected:
                                    const uint32_t& loadFlags,
                                    const OptionalURIParams& apiRedirectUri,
                                    const OptionalCorsPreflightArgs& aCorsPreflightArgs,
-                                   const bool& aForceHSTSPriming,
-                                   const bool& aMixedContentWouldBlock,
                                    const bool& aChooseAppcache) override;
   virtual bool RecvUpdateAssociatedContentSecurity(const int32_t& broken,
                                                    const int32_t& no) override;
diff --git a/netwerk/protocol/http/PHttpChannel.ipdl b/netwerk/protocol/http/PHttpChannel.ipdl
index 1eb25a403..c77a53e40 100644
--- a/netwerk/protocol/http/PHttpChannel.ipdl
+++ b/netwerk/protocol/http/PHttpChannel.ipdl
@@ -47,7 +47,6 @@ parent:
   async Redirect2Verify(nsresult result, RequestHeaderTuples changedHeaders,
                         uint32_t loadFlags, OptionalURIParams apiRedirectTo,
                         OptionalCorsPreflightArgs corsPreflightArgs,
-                        bool forceHSTSPriming, bool mixedContentWouldBlock,
                         bool chooseAppcache);
 
   // For document loads we keep this protocol open after child's
diff --git a/netwerk/protocol/http/moz.build b/netwerk/protocol/http/moz.build
index e13101aa0..1368ee707 100644
--- a/netwerk/protocol/http/moz.build
+++ b/netwerk/protocol/http/moz.build
@@ -5,7 +5,6 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 XPIDL_SOURCES += [
-    'nsIHstsPrimingCallback.idl',
     'nsIHttpActivityObserver.idl',
     'nsIHttpAuthenticableChannel.idl',
     'nsIHttpAuthenticator.idl',
@@ -58,7 +57,6 @@ UNIFIED_SOURCES += [
     'AltDataOutputStreamParent.cpp',
     'CacheControlParser.cpp',
     'ConnectionDiagnostics.cpp',
-    'HSTSPrimerListener.cpp',
     'Http2Compression.cpp',
     'Http2Push.cpp',
     'Http2Session.cpp',
diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
index 9107b16e8..7bcec146d 100644
--- a/netwerk/protocol/http/nsHttpChannel.cpp
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -100,7 +100,6 @@
 #include "mozilla/net/Predictor.h"
 #include "CacheControlParser.h"
 #include "nsMixedContentBlocker.h"
-#include "HSTSPrimerListener.h"
 #include "CacheStorageService.h"
 
 namespace mozilla { namespace net {
@@ -465,50 +464,12 @@ nsHttpChannel::Connect()
         // otherwise, let's just proceed without using the cache.
     }
 
-    return TryHSTSPriming();
-}
-
-nsresult
-nsHttpChannel::TryHSTSPriming()
-{
-    if (mLoadInfo) {
-        // HSTS priming requires the LoadInfo provided with AsyncOpen2
-        bool requireHSTSPriming =
-            mLoadInfo->GetForceHSTSPriming();
-
-        if (requireHSTSPriming &&
-                nsMixedContentBlocker::sSendHSTSPriming &&
-                mInterceptCache == DO_NOT_INTERCEPT) {
-            bool isHttpsScheme;
-            nsresult rv = mURI->SchemeIs("https", &isHttpsScheme);
-            NS_ENSURE_SUCCESS(rv, rv);
-            if (!isHttpsScheme) {
-                rv = HSTSPrimingListener::StartHSTSPriming(this, this);
-
-                if (NS_FAILED(rv)) {
-                    CloseCacheEntry(false);
-                    return rv;
-                }
-
-                return NS_OK;
-            }
-
-            // The request was already upgraded, for example by
-            // upgrade-insecure-requests or a prior successful priming request
-            Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                    HSTSPrimingResult::eHSTS_PRIMING_ALREADY_UPGRADED);
-            mLoadInfo->ClearHSTSPriming();
-        }
-    }
-
     return ContinueConnect();
 }
 
 nsresult
 nsHttpChannel::ContinueConnect()
 {
-    // If we have had HSTS priming, we need to reevaluate whether we need
-    // a CORS preflight. Bug: 1272440
     // 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 (!mIsCorsPreflightDone && mRequireCORSPreflight &&
@@ -4283,7 +4244,7 @@ nsHttpChannel::OnCacheEntryAvailableInternal(nsICacheEntry *entry,
         return NS_OK;
     }
 
-    return TryHSTSPriming();
+    return ContinueConnect();
 }
 
 nsresult
@@ -5699,7 +5660,6 @@ NS_INTERFACE_MAP_BEGIN(nsHttpChannel)
     NS_INTERFACE_MAP_ENTRY(nsIDNSListener)
     NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
     NS_INTERFACE_MAP_ENTRY(nsICorsPreflightCallback)
-    NS_INTERFACE_MAP_ENTRY(nsIHstsPrimingCallback)
     NS_INTERFACE_MAP_ENTRY(nsIChannelWithDivertableParentListener)
     // we have no macro that covers this case.
     if (aIID.Equals(NS_GET_IID(nsHttpChannel)) ) {
@@ -8186,107 +8146,6 @@ nsHttpChannel::OnPreflightFailed(nsresult aError)
 }
 
 //-----------------------------------------------------------------------------
-// nsIHstsPrimingCallback functions
-//-----------------------------------------------------------------------------
-
-/*
- * May be invoked synchronously if HSTS priming has already been performed
- * for the host.
- */
-nsresult
-nsHttpChannel::OnHSTSPrimingSucceeded(bool aCached)
-{
-    if (nsMixedContentBlocker::sUseHSTS) {
-        // redirect the channel to HTTPS if the pref
-        // "security.mixed_content.use_hsts" is true
-        LOG(("HSTS Priming succeeded, redirecting to HTTPS [this=%p]", this));
-        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                (aCached) ? HSTSPrimingResult::eHSTS_PRIMING_CACHED_DO_UPGRADE :
-                            HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED);
-        return AsyncCall(&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
-    }
-
-    // If "security.mixed_content.use_hsts" is false, record the result of
-    // HSTS priming and block or proceed with the load as required by
-    // mixed-content blocking
-    bool wouldBlock = mLoadInfo->GetMixedContentWouldBlock();
-
-    // preserve the mixed-content-before-hsts order and block if required
-    if (wouldBlock) {
-        LOG(("HSTS Priming succeeded, blocking for mixed-content [this=%p]",
-                    this));
-        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                              HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED_BLOCK);
-        CloseCacheEntry(false);
-        return AsyncAbort(NS_ERROR_CONTENT_BLOCKED);
-    }
-
-    LOG(("HSTS Priming succeeded, loading insecure: [this=%p]", this));
-    Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                          HSTSPrimingResult::eHSTS_PRIMING_SUCCEEDED_HTTP);
-
-    nsresult rv = ContinueConnect();
-    if (NS_FAILED(rv)) {
-        CloseCacheEntry(false);
-        return AsyncAbort(rv);
-    }
-
-    return NS_OK;
-}
-
-/*
- * May be invoked synchronously if HSTS priming has already been performed
- * for the host.
- */
-nsresult
-nsHttpChannel::OnHSTSPrimingFailed(nsresult aError, bool aCached)
-{
-    bool wouldBlock = mLoadInfo->GetMixedContentWouldBlock();
-
-    LOG(("HSTS Priming Failed [this=%p], %s the load", this,
-                (wouldBlock) ? "blocking" : "allowing"));
-    if (aCached) {
-        // Between the time we marked for priming and started the priming request,
-        // the host was found to not allow the upgrade, probably from another
-        // priming request.
-        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                (wouldBlock) ?  HSTSPrimingResult::eHSTS_PRIMING_CACHED_BLOCK :
-                                HSTSPrimingResult::eHSTS_PRIMING_CACHED_NO_UPGRADE);
-    } else {
-        // A priming request was sent, and no HSTS header was found that allows
-        // the upgrade.
-        Telemetry::Accumulate(Telemetry::MIXED_CONTENT_HSTS_PRIMING_RESULT,
-                (wouldBlock) ?  HSTSPrimingResult::eHSTS_PRIMING_FAILED_BLOCK :
-                                HSTSPrimingResult::eHSTS_PRIMING_FAILED_ACCEPT);
-    }
-
-    // Don't visit again for at least
-    // security.mixed_content.hsts_priming_cache_timeout seconds.
-    nsISiteSecurityService* sss = gHttpHandler->GetSSService();
-    NS_ENSURE_TRUE(sss, NS_ERROR_OUT_OF_MEMORY);
-    nsresult rv = sss->CacheNegativeHSTSResult(mURI,
-            nsMixedContentBlocker::sHSTSPrimingCacheTimeout);
-    if (NS_FAILED(rv)) {
-        NS_ERROR("nsISiteSecurityService::CacheNegativeHSTSResult failed");
-    }
-
-    // If we would block, go ahead and abort with the error provided
-    if (wouldBlock) {
-        CloseCacheEntry(false);
-        return AsyncAbort(aError);
-    }
-
-    // we can continue the load and the UI has been updated as mixed content
-    rv = ContinueConnect();
-    if (NS_FAILED(rv)) {
-        CloseCacheEntry(false);
-        return AsyncAbort(rv);
-    }
-
-    return NS_OK;
-}
-
-//-----------------------------------------------------------------------------
 // AChannelHasDivertableParentChannelAsListener internal functions
 //-----------------------------------------------------------------------------
 
diff --git a/netwerk/protocol/http/nsHttpChannel.h b/netwerk/protocol/http/nsHttpChannel.h
index cb8925d04..3a322e8e2 100644
--- a/netwerk/protocol/http/nsHttpChannel.h
+++ b/netwerk/protocol/http/nsHttpChannel.h
@@ -28,7 +28,6 @@
 #include "nsISupportsPrimitives.h"
 #include "nsICorsPreflightCallback.h"
 #include "AlternateServices.h"
-#include "nsIHstsPrimingCallback.h"
 
 class nsDNSPrefetch;
 class nsICancelable;
@@ -76,7 +75,6 @@ class nsHttpChannel final : public HttpBaseChannel
                           , public nsSupportsWeakReference
                           , public nsICorsPreflightCallback
                           , public nsIChannelWithDivertableParentListener
-                          , public nsIHstsPrimingCallback
 {
 public:
     NS_DECL_ISUPPORTS_INHERITED
@@ -92,7 +90,6 @@ public:
     NS_DECL_NSIAPPLICATIONCACHECONTAINER
     NS_DECL_NSIAPPLICATIONCACHECHANNEL
     NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK
-    NS_DECL_NSIHSTSPRIMINGCALLBACK
     NS_DECL_NSITHREADRETARGETABLEREQUEST
     NS_DECL_NSIDNSLISTENER
     NS_DECL_NSICHANNELWITHDIVERTABLEPARENTLISTENER
@@ -211,9 +208,6 @@ public: /* internal necko use only */
     nsresult OpenCacheEntry(bool usingSSL);
     nsresult ContinueConnect();
 
-    // If the load is mixed-content, build and send an HSTS priming request.
-    nsresult TryHSTSPriming();
-
     nsresult StartRedirectChannelToURI(nsIURI *, uint32_t);
 
     // This allows cache entry to be marked as foreign even after channel itself
diff --git a/netwerk/protocol/http/nsIHstsPrimingCallback.idl b/netwerk/protocol/http/nsIHstsPrimingCallback.idl
deleted file mode 100644
index 01f53a5b2..000000000
--- a/netwerk/protocol/http/nsIHstsPrimingCallback.idl
+++ /dev/null
@@ -1,50 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "nsISupports.idl"
-
-/**
- * HSTS priming attempts to prevent mixed-content by looking for the
- * Strict-Transport-Security header as a signal from the server that it is
- * safe to upgrade HTTP to HTTPS.
- *
- * Since mixed-content blocking happens very early in the process in AsyncOpen2,
- * the status of mixed-content blocking is stored in the LoadInfo and then used
- * to determine whether to send a priming request or not.
- *
- * This interface is implemented by nsHttpChannel so that it can receive the
- * result of HSTS priming.
- */
-[builtinclass, uuid(eca6daca-3f2a-4a2a-b3bf-9f24f79bc999)]
-interface nsIHstsPrimingCallback : nsISupports
-{
-  /**
-   * HSTS priming has succeeded with an STS header, and the site asserts it is
-   * safe to upgrade the request from HTTP to HTTPS. The request may still be
-   * blocked based on the user's preferences.
-   *
-   * May be invoked synchronously if HSTS priming has already been performed
-   * for the host.
-   *
-   * @param aCached whether the result was already in the HSTS cache
-   */
-  [noscript, nostdcall]
-  void onHSTSPrimingSucceeded(in bool aCached);
-  /**
-   * HSTS priming has seen no STS header, the request itself has failed,
-   * or some other failure which does not constitute a positive signal that the
-   * site can be upgraded safely to HTTPS. The request may still be allowed
-   * based on the user's preferences.
-   *
-   * May be invoked synchronously if HSTS priming has already been performed
-   * for the host.
-   *
-   * @param aError The error which caused this failure, or NS_ERROR_CONTENT_BLOCKED
-   * @param aCached whether the result was already in the HSTS cache
-   */
-  [noscript, nostdcall]
-  void onHSTSPrimingFailed(in nsresult aError, in bool aCached);
-};