diff --git a/netwerk/base/nsBaseChannel.cpp b/netwerk/base/nsBaseChannel.cpp
index d12d518e012e..07a12c8fa5b6 100644
--- a/netwerk/base/nsBaseChannel.cpp
+++ b/netwerk/base/nsBaseChannel.cpp
@@ -12,7 +12,6 @@
 #include "nsIContentSniffer.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsMimeTypes.h"
-#include "nsIHttpEventSink.h"
 #include "nsIHttpChannel.h"
 #include "nsIChannelEventSink.h"
 #include "nsIStreamConverterService.h"
@@ -131,9 +130,7 @@ nsBaseChannel::Redirect(nsIChannel *newChannel, uint32_t redirectFlags,
     }
   }
 
-  // Notify consumer, giving chance to cancel redirect.  For backwards compat,
-  // we support nsIHttpEventSink if we are an HTTP channel and if this is not
-  // an internal redirect.
+  // Notify consumer, giving chance to cancel redirect.
 
   RefPtr<nsAsyncRedirectVerifyHelper> redirectCallbackHelper =
       new nsAsyncRedirectVerifyHelper();
@@ -158,23 +155,6 @@ nsBaseChannel::Redirect(nsIChannel *newChannel, uint32_t redirectFlags,
 nsresult
 nsBaseChannel::ContinueRedirect()
 {
-  // Backwards compat for non-internal redirects from a HTTP channel.
-  // XXX Is our http channel implementation going to derive from nsBaseChannel?
-  //     If not, this code can be removed.
-  if (!(mRedirectFlags & nsIChannelEventSink::REDIRECT_INTERNAL)) {
-    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface();
-    if (httpChannel) {
-      nsCOMPtr<nsIHttpEventSink> httpEventSink;
-      GetCallback(httpEventSink);
-      if (httpEventSink) {
-        nsresult rv = httpEventSink->OnRedirect(httpChannel, mRedirectChannel);
-        if (NS_FAILED(rv)) {
-          return rv;
-        }
-      }
-    }
-  }
-
   // Make sure to do this _after_ making all the OnChannelRedirect calls
   mRedirectChannel->SetOriginalURI(OriginalURI());
 
diff --git a/netwerk/protocol/http/HttpChannelParentListener.cpp b/netwerk/protocol/http/HttpChannelParentListener.cpp
index a10dd94f7bfd..2066f162a0cc 100644
--- a/netwerk/protocol/http/HttpChannelParentListener.cpp
+++ b/netwerk/protocol/http/HttpChannelParentListener.cpp
@@ -12,7 +12,6 @@
 #include "mozilla/Unused.h"
 #include "nsIAuthPrompt.h"
 #include "nsIAuthPrompt2.h"
-#include "nsIHttpEventSink.h"
 #include "nsIHttpHeaderVisitor.h"
 #include "nsIRedirectChannelRegistrar.h"
 #include "nsIPromptFactory.h"
@@ -123,7 +122,6 @@ NS_IMETHODIMP
 HttpChannelParentListener::GetInterface(const nsIID& aIID, void **result)
 {
   if (aIID.Equals(NS_GET_IID(nsIChannelEventSink)) ||
-      aIID.Equals(NS_GET_IID(nsIHttpEventSink))  ||
       aIID.Equals(NS_GET_IID(nsINetworkInterceptController))  ||
       aIID.Equals(NS_GET_IID(nsIRedirectResultListener)))
   {
diff --git a/netwerk/protocol/http/moz.build b/netwerk/protocol/http/moz.build
index ec866dd9876d..8d4baa53a75b 100644
--- a/netwerk/protocol/http/moz.build
+++ b/netwerk/protocol/http/moz.build
@@ -18,7 +18,6 @@ XPIDL_SOURCES += [
     'nsIHttpChannelAuthProvider.idl',
     'nsIHttpChannelChild.idl',
     'nsIHttpChannelInternal.idl',
-    'nsIHttpEventSink.idl',
     'nsIHttpHeaderVisitor.idl',
     'nsIHttpProtocolHandler.idl',
     'nsIRaceCacheWithNetwork.idl',
diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
index c6ea71b0f1d8..c018705f3cf6 100644
--- a/netwerk/protocol/http/nsHttpChannel.cpp
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -76,7 +76,6 @@
 #include "nsICancelable.h"
 #include "nsIHttpChannelAuthProvider.h"
 #include "nsIHttpChannelInternal.h"
-#include "nsIHttpEventSink.h"
 #include "nsIPrompt.h"
 #include "nsInputStreamPump.h"
 #include "nsURLHelper.h"
@@ -3014,18 +3013,6 @@ nsHttpChannel::OpenRedirectChannel(nsresult rv)
     // i.e. after all sinks had been notified
     mRedirectChannel->SetOriginalURI(mOriginalURI);
 
-    // And now, notify observers the deprecated way
-    nsCOMPtr<nsIHttpEventSink> httpEventSink;
-    GetCallback(httpEventSink);
-    if (httpEventSink) {
-        // NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
-        // versions.
-        rv = httpEventSink->OnRedirect(this, mRedirectChannel);
-        if (NS_FAILED(rv)) {
-            return rv;
-        }
-    }
-
     // open new channel
     if (mLoadInfo && mLoadInfo->GetEnforceSecurity()) {
         MOZ_ASSERT(!mListenerContext, "mListenerContext should be null!");
@@ -5793,16 +5780,6 @@ nsHttpChannel::ContinueProcessRedirection(nsresult rv)
     // i.e. after all sinks had been notified
     mRedirectChannel->SetOriginalURI(mOriginalURI);
 
-    // And now, the deprecated way
-    nsCOMPtr<nsIHttpEventSink> httpEventSink;
-    GetCallback(httpEventSink);
-    if (httpEventSink) {
-        // NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
-        // versions.
-        rv = httpEventSink->OnRedirect(this, mRedirectChannel);
-        if (NS_FAILED(rv))
-            return rv;
-    }
     // XXX we used to talk directly with the script security manager, but that
     // should really be handled by the event sink implementation.
 
diff --git a/netwerk/protocol/http/nsIHttpEventSink.idl b/netwerk/protocol/http/nsIHttpEventSink.idl
deleted file mode 100644
index 5db2e1a30da5..000000000000
--- a/netwerk/protocol/http/nsIHttpEventSink.idl
+++ /dev/null
@@ -1,37 +0,0 @@
-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
-/* 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"
-
-interface nsIChannel;
-interface nsIHttpChannel;
-interface nsIURI;
-
-/**
- * nsIHttpEventSink
- *
- * Implement this interface to receive control over various HTTP events.  The
- * HTTP channel will try to get this interface from its notificationCallbacks
- * attribute, and if it doesn't find it there it will look for it from its
- * loadGroup's notificationCallbacks attribute.
- *
- * These methods are called before onStartRequest, and should be handled
- * SYNCHRONOUSLY.
- *
- * @deprecated Newly written code should use nsIChannelEventSink instead of this
- * interface.
- */
-[scriptable, uuid(9475a6af-6352-4251-90f9-d65b1cd2ea15)]
-interface nsIHttpEventSink : nsISupports
-{
-    /**
-     * Called when a redirect occurs due to a HTTP response like 302.  The
-     * redirection may be to a non-http channel.
-     *
-     * @return failure cancels redirect
-     */
-    [must_use] void onRedirect(in nsIHttpChannel httpChannel,
-                               in nsIChannel newChannel);
-};
diff --git a/toolkit/components/search/nsSearchService.js b/toolkit/components/search/nsSearchService.js
index cc9406165c94..530219d63d7e 100644
--- a/toolkit/components/search/nsSearchService.js
+++ b/toolkit/components/search/nsSearchService.js
@@ -286,8 +286,6 @@ loadListener.prototype = {
     Ci.nsIStreamListener,
     Ci.nsIChannelEventSink,
     Ci.nsIInterfaceRequestor,
-    // See FIXME comment below.
-    Ci.nsIHttpEventSink,
     Ci.nsIProgressEventSink
   ]),
 
@@ -338,9 +336,6 @@ loadListener.prototype = {
     return this.QueryInterface(aIID);
   },
 
-  // FIXME: bug 253127
-  // nsIHttpEventSink
-  onRedirect(aChannel, aNewChannel) {},
   // nsIProgressEventSink
   onProgress(aRequest, aContext, aProgress, aProgressMax) {},
   onStatus(aRequest, aContext, aStatus, aStatusArg) {}