Telemetry: Remove stubs and related code

25 files changed, 17 insertions, 616 deletions

diff --git a/netwerk/base/BackgroundFileSaver.cpp b/netwerk/base/BackgroundFileSaver.cpp
index cfe94e35b..b338c2a08 100644
--- a/netwerk/base/BackgroundFileSaver.cpp
+++ b/netwerk/base/BackgroundFileSaver.cpp
@@ -9,7 +9,6 @@
 #include "ScopedNSSTypes.h"
 #include "mozilla/Casting.h"
 #include "mozilla/Logging.h"
-#include "mozilla/Telemetry.h"
 #include "nsCOMArray.h"
 #include "nsIAsyncInputStream.h"
 #include "nsIFile.h"
@@ -85,7 +84,6 @@ private:
 //// BackgroundFileSaver
 
 uint32_t BackgroundFileSaver::sThreadCount = 0;
-uint32_t BackgroundFileSaver::sTelemetryMaxThreadCount = 0;
 
 BackgroundFileSaver::BackgroundFileSaver()
 : mControlThread(nullptr)
@@ -156,9 +154,6 @@ BackgroundFileSaver::Init()
   NS_ENSURE_SUCCESS(rv, rv);
 
   sThreadCount++;
-  if (sThreadCount > sTelemetryMaxThreadCount) {
-    sTelemetryMaxThreadCount = sThreadCount;
-  }
 
   return NS_OK;
 }
@@ -793,14 +788,6 @@ BackgroundFileSaver::NotifySaveComplete()
 
   sThreadCount--;
 
-  // When there are no more active downloads, we consider the download session
-  // finished. We record the maximum number of concurrent downloads reached
-  // during the session in a telemetry histogram, and we reset the maximum
-  // thread counter for the next download session
-  if (sThreadCount == 0) {
-    sTelemetryMaxThreadCount = 0;
-  }
-
   return NS_OK;
 }
 
diff --git a/netwerk/base/BackgroundFileSaver.h b/netwerk/base/BackgroundFileSaver.h
index 1fa9268f8..86d3a1ba7 100644
--- a/netwerk/base/BackgroundFileSaver.h
+++ b/netwerk/base/BackgroundFileSaver.h
@@ -61,15 +61,6 @@ public:
    */
   static uint32_t sThreadCount;
 
-  /**
-   * Maximum number of worker threads reached during the current download session,
-   * used for telemetry.
-   *
-   * When there are no more worker threads running, we consider the download
-   * session finished, and this counter is reset.
-   */
-  static uint32_t sTelemetryMaxThreadCount;
-
 
 protected:
   virtual ~BackgroundFileSaver();
diff --git a/netwerk/base/nsIOService.cpp b/netwerk/base/nsIOService.cpp
index 435294315..e0dc7d8e8 100644
--- a/netwerk/base/nsIOService.cpp
+++ b/netwerk/base/nsIOService.cpp
@@ -48,7 +48,6 @@
 #include "mozilla/LoadInfo.h"
 #include "mozilla/net/NeckoCommon.h"
 #include "mozilla/Services.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/net/DNS.h"
 #include "mozilla/ipc/URIUtils.h"
 #include "mozilla/net/NeckoChild.h"
@@ -166,8 +165,6 @@ static const char kProfileDoChange[] = "profile-do-change";
 uint32_t   nsIOService::gDefaultSegmentSize = 4096;
 uint32_t   nsIOService::gDefaultSegmentCount = 24;
 
-bool nsIOService::sTelemetryEnabled = false;
-
 bool nsIOService::sBlockToplevelDataUriNavigations = false;
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -185,9 +182,6 @@ nsIOService::nsIOService()
     , mNetworkLinkServiceInitialized(false)
     , mChannelEventSinks(NS_CHANNEL_EVENT_SINK_CATEGORY)
     , mNetworkNotifyChanged(true)
-    , mLastOfflineStateChange(PR_IntervalNow())
-    , mLastConnectivityChange(PR_IntervalNow())
-    , mLastNetworkLinkChange(PR_IntervalNow())
     , mNetTearingDownStarted(0)
 {
 }
@@ -247,7 +241,6 @@ nsIOService::Init()
     else
         NS_WARNING("failed to get observer service");
 
-    Preferences::AddBoolVarCache(&sTelemetryEnabled, "toolkit.telemetry.enabled", false);
     Preferences::AddBoolVarCache(&sBlockToplevelDataUriNavigations,
                                  "security.data_uri.block_toplevel_data_uri_navigations", false);
     Preferences::AddBoolVarCache(&mOfflineMirrorsConnectivity, OFFLINE_MIRRORS_CONNECTIVITY, true);
@@ -1068,7 +1061,6 @@ nsIOService::SetOffline(bool offline)
             if (mSocketTransportService)
                 mSocketTransportService->SetOffline(true);
 
-            mLastOfflineStateChange = PR_IntervalNow();
             if (observerService)
                 observerService->NotifyObservers(subject,
                                                  NS_IOSERVICE_OFFLINE_STATUS_TOPIC,
@@ -1088,7 +1080,6 @@ nsIOService::SetOffline(bool offline)
             if (mProxyService)
                 mProxyService->ReloadPAC();
 
-            mLastOfflineStateChange = PR_IntervalNow();
             // don't care if notification fails
             // Only send the ONLINE notification if there is connectivity
             if (observerService && mConnectivity) {
@@ -1147,10 +1138,6 @@ nsIOService::SetConnectivityInternal(bool aConnectivity)
     }
     mConnectivity = aConnectivity;
 
-    // This is used for PR_Connect PR_Close telemetry so it is important that
-    // we have statistic about network change event even if we are offline.
-    mLastConnectivityChange = PR_IntervalNow();
-
     if (mCaptivePortalService) {
         if (aConnectivity && !xpc::AreNonLocalConnectionsDisabled()) {
             // This will also trigger a captive portal check for the new network
@@ -1621,7 +1608,6 @@ nsIOService::OnNetworkLinkEvent(const char *data)
 
     bool isUp = true;
     if (!strcmp(data, NS_NETWORK_LINK_DATA_CHANGED)) {
-        mLastNetworkLinkChange = PR_IntervalNow();
         // CHANGED means UP/DOWN didn't change
         // but the status of the captive portal may have changed.
         RecheckCaptivePortal();
diff --git a/netwerk/base/nsIOService.h b/netwerk/base/nsIOService.h
index e592c4d1c..19eed743a 100644
--- a/netwerk/base/nsIOService.h
+++ b/netwerk/base/nsIOService.h
@@ -79,9 +79,6 @@ public:
                                     nsAsyncRedirectVerifyHelper *helper);
 
     bool IsOffline() { return mOffline; }
-    PRIntervalTime LastOfflineStateChange() { return mLastOfflineStateChange; }
-    PRIntervalTime LastConnectivityChange() { return mLastConnectivityChange; }
-    PRIntervalTime LastNetworkLinkChange() { return mLastNetworkLinkChange; }
     bool IsNetTearingDown() { return mShutdown || mOfflineForProfileChange ||
                                      mHttpHandlerAlreadyShutingDown; }
     PRIntervalTime NetTearingDownStarted() { return mNetTearingDownStarted; }
@@ -176,18 +173,8 @@ private:
 
     bool                                 mNetworkNotifyChanged;
 
-    static bool                          sTelemetryEnabled;
-
     static bool                          sBlockToplevelDataUriNavigations;
 
-    // These timestamps are needed for collecting telemetry on PR_Connect,
-    // PR_ConnectContinue and PR_Close blocking time.  If we spend very long
-    // time in any of these functions we want to know if and what network
-    // change has happened shortly before.
-    mozilla::Atomic<PRIntervalTime> mLastOfflineStateChange;
-    mozilla::Atomic<PRIntervalTime> mLastConnectivityChange;
-    mozilla::Atomic<PRIntervalTime> mLastNetworkLinkChange;
-
     // Time a network tearing down started.
     mozilla::Atomic<PRIntervalTime> mNetTearingDownStarted;
 public:
diff --git a/netwerk/base/nsLoadGroup.cpp b/netwerk/base/nsLoadGroup.cpp
index 9981bd698..48d9a6621 100644
--- a/netwerk/base/nsLoadGroup.cpp
+++ b/netwerk/base/nsLoadGroup.cpp
@@ -108,9 +108,6 @@ nsLoadGroup::nsLoadGroup(nsISupports* outer)
     , mStatus(NS_OK)
     , mPriority(PRIORITY_NORMAL)
     , mIsCanceling(false)
-    , mDefaultLoadIsTimed(false)
-    , mTimedRequests(0)
-    , mCachedRequests(0)
     , mTimedNonCachedRequestsUntilOnEndPageLoad(0)
 {
     NS_INIT_AGGREGATED(outer);
@@ -431,13 +428,6 @@ nsLoadGroup::SetDefaultLoadRequest(nsIRequest *aRequest)
         // in particular, nsIChannel::LOAD_DOCUMENT_URI...
         //
         mLoadFlags &= nsIRequest::LOAD_REQUESTMASK;
-
-        nsCOMPtr<nsITimedChannel> timedChannel = do_QueryInterface(aRequest);
-        mDefaultLoadIsTimed = timedChannel != nullptr;
-        if (mDefaultLoadIsTimed) {
-            timedChannel->GetChannelCreation(&mDefaultRequestCreationTime);
-            timedChannel->SetTimingEnabled(true);
-        }
     }
     // Else, do not change the group's load flags (see bug 95981)
     return NS_OK;
@@ -492,10 +482,6 @@ nsLoadGroup::AddRequest(nsIRequest *request, nsISupports* ctxt)
     if (mPriority != 0)
         RescheduleRequest(request, mPriority);
 
-    nsCOMPtr<nsITimedChannel> timedChannel = do_QueryInterface(request);
-    if (timedChannel)
-        timedChannel->SetTimingEnabled(true);
-
     if (!(flags & nsIRequest::LOAD_BACKGROUND)) {
         // Update the count of foreground URIs..
         mForegroundCount += 1;
@@ -573,10 +559,6 @@ nsLoadGroup::RemoveRequest(nsIRequest *request, nsISupports* ctxt,
 
     mRequests.RemoveEntry(entry);
 
-    if (mRequests.EntryCount() == 0) {
-        TelemetryReport();
-    }
-
     // Undo any group priority delta...
     if (mPriority != 0)
         RescheduleRequest(request, -mPriority);
@@ -777,82 +759,6 @@ nsLoadGroup::SetDefaultLoadFlags(uint32_t aFlags)
 
 ////////////////////////////////////////////////////////////////////////////////
 
-void
-nsLoadGroup::TelemetryReport()
-{
-  /* STUB */
-    mTimedRequests = 0;
-    mCachedRequests = 0;
-    mDefaultLoadIsTimed = false;
-}
-
-void
-nsLoadGroup::TelemetryReportChannel(nsITimedChannel *aTimedChannel,
-                                    bool aDefaultRequest)
-{
-    nsresult rv;
-    bool timingEnabled;
-    rv = aTimedChannel->GetTimingEnabled(&timingEnabled);
-    if (NS_FAILED(rv) || !timingEnabled)
-        return;
-
-    TimeStamp asyncOpen;
-    rv = aTimedChannel->GetAsyncOpen(&asyncOpen);
-    // We do not check !asyncOpen.IsNull() bellow, prevent ASSERTIONs this way
-    if (NS_FAILED(rv) || asyncOpen.IsNull())
-        return;
-
-    TimeStamp cacheReadStart;
-    rv = aTimedChannel->GetCacheReadStart(&cacheReadStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp cacheReadEnd;
-    rv = aTimedChannel->GetCacheReadEnd(&cacheReadEnd);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp domainLookupStart;
-    rv = aTimedChannel->GetDomainLookupStart(&domainLookupStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp domainLookupEnd;
-    rv = aTimedChannel->GetDomainLookupEnd(&domainLookupEnd);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp connectStart;
-    rv = aTimedChannel->GetConnectStart(&connectStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp secureConnectionStart;
-    rv = aTimedChannel->GetSecureConnectionStart(&secureConnectionStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp connectEnd;
-    rv = aTimedChannel->GetConnectEnd(&connectEnd);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp requestStart;
-    rv = aTimedChannel->GetRequestStart(&requestStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp responseStart;
-    rv = aTimedChannel->GetResponseStart(&responseStart);
-    if (NS_FAILED(rv))
-        return;
-
-    TimeStamp responseEnd;
-    rv = aTimedChannel->GetResponseEnd(&responseEnd);
-    if (NS_FAILED(rv))
-        return;
-}
-
 nsresult nsLoadGroup::MergeLoadFlags(nsIRequest *aRequest,
                                      nsLoadFlags& outFlags)
 {
diff --git a/netwerk/base/nsLoadGroup.h b/netwerk/base/nsLoadGroup.h
index 20dd94cf9..9b5e70868 100644
--- a/netwerk/base/nsLoadGroup.h
+++ b/netwerk/base/nsLoadGroup.h
@@ -62,11 +62,6 @@ protected:
     nsresult MergeLoadFlags(nsIRequest *aRequest, nsLoadFlags& flags);
     nsresult MergeDefaultLoadFlags(nsIRequest *aRequest, nsLoadFlags& flags);
 
-private:
-    void TelemetryReport();
-    void TelemetryReportChannel(nsITimedChannel *timedChannel,
-                                bool defaultRequest);
-
 protected:
     uint32_t                        mForegroundCount;
     uint32_t                        mLoadFlags;
@@ -87,12 +82,6 @@ protected:
     int32_t                         mPriority;
     bool                            mIsCanceling;
 
-    /* Telemetry */
-    mozilla::TimeStamp              mDefaultRequestCreationTime;
-    bool                            mDefaultLoadIsTimed;
-    uint32_t                        mTimedRequests;
-    uint32_t                        mCachedRequests;
-
     /* For nsPILoadGroupInternal */
     uint32_t                        mTimedNonCachedRequestsUntilOnEndPageLoad;
 };
diff --git a/netwerk/base/nsSocketTransport2.cpp b/netwerk/base/nsSocketTransport2.cpp
index f9b55ead4..0c8434813 100644
--- a/netwerk/base/nsSocketTransport2.cpp
+++ b/netwerk/base/nsSocketTransport2.cpp
@@ -7,7 +7,6 @@
 #include "nsSocketTransport2.h"
 
 #include "mozilla/Attributes.h"
-#include "mozilla/Telemetry.h"
 #include "nsIOService.h"
 #include "nsStreamUtils.h"
 #include "nsNetSegmentUtils.h"
@@ -1226,8 +1225,7 @@ nsSocketTransport::BuildSocket(PRFileDesc *&fd, bool &proxyTransparent, bool &us
         if (NS_FAILED(rv)) {
             SOCKET_LOG(("  error pushing io layer [%u:%s rv=%x]\n", i, mTypes[i], rv));
             if (fd) {
-                CloseSocket(fd,
-                    mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
+                CloseSocket(fd);
             }
         }
     }
@@ -1395,8 +1393,7 @@ nsSocketTransport::InitiateSocket()
     // inform socket transport about this newly created socket...
     rv = mSocketTransportService->AttachSocket(fd, this);
     if (NS_FAILED(rv)) {
-        CloseSocket(fd,
-            mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
+        CloseSocket(fd);
         return rv;
     }
     mAttached = true;
@@ -1453,26 +1450,8 @@ nsSocketTransport::InitiateSocket()
     }
 #endif
 
-    // We use PRIntervalTime here because we need
-    // nsIOService::LastOfflineStateChange time and
-    // nsIOService::LastConectivityChange time to be atomic.
-    PRIntervalTime connectStarted = 0;
-    if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
-        connectStarted = PR_IntervalNow();
-    }
-
     status = PR_Connect(fd, &prAddr, NS_SOCKET_CONNECT_TIMEOUT);
 
-    if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
-        connectStarted) {
-        SendPRBlockingTelemetry(connectStarted,
-            Telemetry::PRCONNECT_BLOCKING_TIME_NORMAL,
-            Telemetry::PRCONNECT_BLOCKING_TIME_SHUTDOWN,
-            Telemetry::PRCONNECT_BLOCKING_TIME_CONNECTIVITY_CHANGE,
-            Telemetry::PRCONNECT_BLOCKING_TIME_LINK_CHANGE,
-            Telemetry::PRCONNECT_BLOCKING_TIME_OFFLINE);
-    }
-
     if (status == PR_SUCCESS) {
         // 
         // we are connected!
@@ -1531,16 +1510,6 @@ nsSocketTransport::InitiateSocket()
         // The connection was refused...
         //
         else {
-            if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
-                connectStarted) {
-                SendPRBlockingTelemetry(connectStarted,
-                    Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_NORMAL,
-                    Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_SHUTDOWN,
-                    Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_CONNECTIVITY_CHANGE,
-                    Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_LINK_CHANGE,
-                    Telemetry::PRCONNECT_FAIL_BLOCKING_TIME_OFFLINE);
-            }
-
             rv = ErrorAccordingToNSPR(code);
             if ((rv == NS_ERROR_CONNECTION_REFUSED) && !mProxyHost.IsEmpty())
                 rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
@@ -1763,8 +1732,7 @@ public:
 
   NS_IMETHOD Run() override
   {
-    nsSocketTransport::CloseSocket(mFD,
-      gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
+    nsSocketTransport::CloseSocket(mFD);
     return NS_OK;
   }
 private:
@@ -1801,8 +1769,7 @@ nsSocketTransport::ReleaseFD_Locked(PRFileDesc *fd)
           SOCKET_LOG(("Intentional leak"));
         } else if (PR_GetCurrentThread() == gSocketThread) {
             SOCKET_LOG(("nsSocketTransport: calling PR_Close [this=%p]\n", this));
-            CloseSocket(mFD,
-                mSocketTransportService->IsTelemetryEnabledAndNotSleepPhase());
+            CloseSocket(mFD);
         } else {
             // Can't PR_Close() a socket off STS thread. Thunk it to STS to die
             STS_PRCloseOnSocketTransport(mFD);
@@ -1960,26 +1927,7 @@ nsSocketTransport::OnSocketReady(PRFileDesc *fd, int16_t outFlags)
         // We do not need to do PR_ConnectContinue when we are already
         // shutting down.
 
-        // We use PRIntervalTime here because we need
-        // nsIOService::LastOfflineStateChange time and
-        // nsIOService::LastConectivityChange time to be atomic.
-        PRIntervalTime connectStarted = 0;
-        if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
-            connectStarted = PR_IntervalNow();
-        }
-
         PRStatus status = PR_ConnectContinue(fd, outFlags);
-
-        if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase() &&
-            connectStarted) {
-            SendPRBlockingTelemetry(connectStarted,
-                Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_NORMAL,
-                Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_SHUTDOWN,
-                Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_CONNECTIVITY_CHANGE,
-                Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_LINK_CHANGE,
-                Telemetry::PRCONNECTCONTINUE_BLOCKING_TIME_OFFLINE);
-        }
-
         if (status == PR_SUCCESS) {
             //
             // we are connected!
@@ -3144,41 +3092,13 @@ nsSocketTransport::PRFileDescAutoLock::SetKeepaliveVals(bool aEnabled,
 }
 
 void
-nsSocketTransport::CloseSocket(PRFileDesc *aFd, bool aTelemetryEnabled)
+nsSocketTransport::CloseSocket(PRFileDesc *aFd)
 {
 #if defined(XP_WIN)
     AttachShutdownLayer(aFd);
 #endif
 
-    // We use PRIntervalTime here because we need
-    // nsIOService::LastOfflineStateChange time and
-    // nsIOService::LastConectivityChange time to be atomic.
-    PRIntervalTime closeStarted;
-    if (aTelemetryEnabled) {
-        closeStarted = PR_IntervalNow();
-    }
-
     PR_Close(aFd);
-
-    if (aTelemetryEnabled) {
-        SendPRBlockingTelemetry(closeStarted,
-            Telemetry::PRCLOSE_TCP_BLOCKING_TIME_NORMAL,
-            Telemetry::PRCLOSE_TCP_BLOCKING_TIME_SHUTDOWN,
-            Telemetry::PRCLOSE_TCP_BLOCKING_TIME_CONNECTIVITY_CHANGE,
-            Telemetry::PRCLOSE_TCP_BLOCKING_TIME_LINK_CHANGE,
-            Telemetry::PRCLOSE_TCP_BLOCKING_TIME_OFFLINE);
-    }
-}
-
-void
-nsSocketTransport::SendPRBlockingTelemetry(PRIntervalTime aStart,
-                                           Telemetry::ID aIDNormal,
-                                           Telemetry::ID aIDShutdown,
-                                           Telemetry::ID aIDConnectivityChange,
-                                           Telemetry::ID aIDLinkChange,
-                                           Telemetry::ID aIDOffline)
-{
-  /* STUB */
 }
 
 } // namespace net
diff --git a/netwerk/base/nsSocketTransport2.h b/netwerk/base/nsSocketTransport2.h
index 7c85ccdc4..310cc58d3 100644
--- a/netwerk/base/nsSocketTransport2.h
+++ b/netwerk/base/nsSocketTransport2.h
@@ -22,7 +22,6 @@
 #include "nsIClassInfo.h"
 #include "mozilla/net/DNS.h"
 #include "nsASocketHandler.h"
-#include "mozilla/Telemetry.h"
 
 #include "prerror.h"
 #include "nsAutoPtr.h"
@@ -169,13 +168,7 @@ public:
 
     uint64_t ByteCountReceived() override { return mInput.ByteCount(); }
     uint64_t ByteCountSent() override { return mOutput.ByteCount(); }
-    static void CloseSocket(PRFileDesc *aFd, bool aTelemetryEnabled);
-    static void SendPRBlockingTelemetry(PRIntervalTime aStart,
-        Telemetry::ID aIDNormal,
-        Telemetry::ID aIDShutdown,
-        Telemetry::ID aIDConnectivityChange,
-        Telemetry::ID aIDLinkChange,
-        Telemetry::ID aIDOffline);
+    static void CloseSocket(PRFileDesc *aFd);
 protected:
 
     virtual ~nsSocketTransport();
diff --git a/netwerk/base/nsSocketTransportService2.cpp b/netwerk/base/nsSocketTransportService2.cpp
index 739388b0f..af5742564 100644
--- a/netwerk/base/nsSocketTransportService2.cpp
+++ b/netwerk/base/nsSocketTransportService2.cpp
@@ -22,7 +22,6 @@
 #include "mozilla/PublicSSL.h"
 #include "mozilla/ChaosMode.h"
 #include "mozilla/PodOperations.h"
-#include "mozilla/Telemetry.h"
 #include "nsThreadUtils.h"
 #include "nsIFile.h"
 #include "nsIWidget.h"
@@ -47,7 +46,6 @@ Atomic<PRThread*, Relaxed> gSocketThread;
 #define SOCKET_LIMIT_MIN      50U
 #define BLIP_INTERVAL_PREF "network.activity.blipIntervalMilliseconds"
 #define MAX_TIME_BETWEEN_TWO_POLLS "network.sts.max_time_for_events_between_two_polls"
-#define TELEMETRY_PREF "toolkit.telemetry.enabled"
 #define MAX_TIME_FOR_PR_CLOSE_DURING_SHUTDOWN "network.sts.max_time_for_pr_close_during_shutdown"
 
 #define REPAIR_POLLABLE_EVENT_TIME 10
@@ -79,9 +77,7 @@ nsSocketTransportService::nsSocketTransportService()
     , mKeepaliveEnabledPref(false)
     , mServingPendingQueue(false)
     , mMaxTimePerPollIter(100)
-    , mTelemetryEnabledPref(false)
     , mMaxTimeForPrClosePref(PR_SecondsToInterval(5))
-    , mSleepPhase(false)
     , mProbedMaxCount(false)
 #if defined(XP_WIN)
     , mPolling(false)
@@ -211,16 +207,9 @@ nsSocketTransportService::AttachSocket(PRFileDesc *fd, nsASocketHandler *handler
 bool
 nsSocketTransportService::CanAttachSocket()
 {
-    static bool reported900FDLimit = false;
-
     uint32_t total = mActiveCount + mIdleCount;
     bool rv = total < gMaxCount;
 
-    if (mTelemetryEnabledPref &&
-        (((total >= 900) || !rv) && !reported900FDLimit)) {
-        reported900FDLimit = true;
-    }
-
     return rv;
 }
 
@@ -438,13 +427,11 @@ nsSocketTransportService::PollTimeout()
 }
 
 int32_t
-nsSocketTransportService::Poll(uint32_t *interval,
-                               TimeDuration *pollDuration)
+nsSocketTransportService::Poll(uint32_t *interval)
 {
     PRPollDesc *pollList;
     uint32_t pollCount;
     PRIntervalTime pollTimeout;
-    *pollDuration = 0;
 
     // If there are pending events for this thread then
     // DoPollIteration() should service the network without blocking.
@@ -470,8 +457,6 @@ nsSocketTransportService::Poll(uint32_t *interval,
 
     PRIntervalTime ts = PR_IntervalNow();
 
-    TimeStamp pollStart;
-
     SOCKET_LOG(("    timeout = %i milliseconds\n",
          PR_IntervalToMilliseconds(pollTimeout)));
     int32_t rv = PR_Poll(pollList, pollCount, pollTimeout);
@@ -530,7 +515,6 @@ nsSocketTransportService::Init()
         tmpPrefService->AddObserver(KEEPALIVE_RETRY_INTERVAL_PREF, this, false);
         tmpPrefService->AddObserver(KEEPALIVE_PROBE_COUNT_PREF, this, false);
         tmpPrefService->AddObserver(MAX_TIME_BETWEEN_TWO_POLLS, this, false);
-        tmpPrefService->AddObserver(TELEMETRY_PREF, this, false);
         tmpPrefService->AddObserver(MAX_TIME_FOR_PR_CLOSE_DURING_SHUTDOWN, this, false);
     }
     UpdatePrefs();
@@ -539,8 +523,6 @@ nsSocketTransportService::Init()
     if (obsSvc) {
         obsSvc->AddObserver(this, "profile-initial-state", false);
         obsSvc->AddObserver(this, "last-pb-context-exited", false);
-        obsSvc->AddObserver(this, NS_WIDGET_SLEEP_OBSERVER_TOPIC, true);
-        obsSvc->AddObserver(this, NS_WIDGET_WAKE_OBSERVER_TOPIC, true);
         obsSvc->AddObserver(this, "xpcom-shutdown-threads", false);
     }
 
@@ -607,16 +589,9 @@ nsSocketTransportService::ShutdownThread()
     if (obsSvc) {
         obsSvc->RemoveObserver(this, "profile-initial-state");
         obsSvc->RemoveObserver(this, "last-pb-context-exited");
-        obsSvc->RemoveObserver(this, NS_WIDGET_SLEEP_OBSERVER_TOPIC);
-        obsSvc->RemoveObserver(this, NS_WIDGET_WAKE_OBSERVER_TOPIC);
         obsSvc->RemoveObserver(this, "xpcom-shutdown-threads");
     }
 
-    if (mAfterWakeUpTimer) {
-        mAfterWakeUpTimer->Cancel();
-        mAfterWakeUpTimer = nullptr;
-    }
-
     NetworkActivityMonitor::Shutdown();
 
     mInitialized = false;
@@ -851,24 +826,16 @@ nsSocketTransportService::Run()
     // make sure the pseudo random number generator is seeded on this thread
     srand(static_cast<unsigned>(PR_Now()));
 
-    // Time blocked in poll().
-    TimeDuration singlePollDuration;
-
     int numberOfPendingEvents;
 
     // If there is too many pending events queued, we will run some poll()
-    // between them and the following variable is cumulative time spent
-    // blocking in poll().
-    TimeDuration pollDuration;
-
+    // between them.
     for (;;) {
         bool pendingEvents = false;
-
         numberOfPendingEvents = 0;
-        pollDuration = 0;
 
         do {
-            DoPollIteration(&singlePollDuration);
+            DoPollIteration();
 
             mRawThread->HasPendingEvents(&pendingEvents);
             if (pendingEvents) {
@@ -959,7 +926,7 @@ nsSocketTransportService::Reset(bool aGuardLocals)
 }
 
 nsresult
-nsSocketTransportService::DoPollIteration(TimeDuration *pollDuration)
+nsSocketTransportService::DoPollIteration()
 {
     SOCKET_LOG(("STS poll iter\n"));
 
@@ -1019,13 +986,12 @@ nsSocketTransportService::DoPollIteration(TimeDuration *pollDuration)
     // Measures seconds spent while blocked on PR_Poll
     uint32_t pollInterval = 0;
     int32_t n = 0;
-    *pollDuration = 0;
     if (!gIOService->IsNetTearingDown()) {
         // Let's not do polling during shutdown.
 #if defined(XP_WIN)
         StartPolling();
 #endif
-        n = Poll(&pollInterval, pollDuration);
+        n = Poll(&pollInterval);
 #if defined(XP_WIN)
         EndPolling();
 #endif
@@ -1171,13 +1137,6 @@ nsSocketTransportService::UpdatePrefs()
             mMaxTimePerPollIter = maxTimePref;
         }
 
-        bool telemetryPref = false;
-        rv = tmpPrefService->GetBoolPref(TELEMETRY_PREF,
-                                         &telemetryPref);
-        if (NS_SUCCEEDED(rv)) {
-            mTelemetryEnabledPref = telemetryPref;
-        }
-
         int32_t maxTimeForPrClosePref;
         rv = tmpPrefService->GetIntPref(MAX_TIME_FOR_PR_CLOSE_DURING_SHUTDOWN,
                                         &maxTimeForPrClosePref);
@@ -1255,10 +1214,6 @@ nsSocketTransportService::Observe(nsISupports *subject,
 
     if (!strcmp(topic, NS_TIMER_CALLBACK_TOPIC)) {
         nsCOMPtr<nsITimer> timer = do_QueryInterface(subject);
-        if (timer == mAfterWakeUpTimer) {
-            mAfterWakeUpTimer = nullptr;
-            mSleepPhase = false;
-        }
 
 #if defined(XP_WIN)
         if (timer == mPollRepairTimer) {
@@ -1266,19 +1221,6 @@ nsSocketTransportService::Observe(nsISupports *subject,
         }
 #endif
 
-    } else if (!strcmp(topic, NS_WIDGET_SLEEP_OBSERVER_TOPIC)) {
-        mSleepPhase = true;
-        if (mAfterWakeUpTimer) {
-            mAfterWakeUpTimer->Cancel();
-            mAfterWakeUpTimer = nullptr;
-        }
-    } else if (!strcmp(topic, NS_WIDGET_WAKE_OBSERVER_TOPIC)) {
-        if (mSleepPhase && !mAfterWakeUpTimer) {
-            mAfterWakeUpTimer = do_CreateInstance("@mozilla.org/timer;1");
-            if (mAfterWakeUpTimer) {
-                mAfterWakeUpTimer->Init(this, 2000, nsITimer::TYPE_ONE_SHOT);
-            }
-        }
     } else if (!strcmp(topic, "xpcom-shutdown-threads")) {
         ShutdownThread();
     }
diff --git a/netwerk/base/nsSocketTransportService2.h b/netwerk/base/nsSocketTransportService2.h
index 81c806793..0b88a6535 100644
--- a/netwerk/base/nsSocketTransportService2.h
+++ b/netwerk/base/nsSocketTransportService2.h
@@ -118,8 +118,6 @@ public:
     // Returns true if keepalives are enabled in prefs.
     bool IsKeepaliveEnabled() { return mKeepaliveEnabledPref; }
 
-    bool IsTelemetryEnabledAndNotSleepPhase() { return mTelemetryEnabledPref &&
-                                                       !mSleepPhase; }
     PRIntervalTime MaxTimeForPrClosePref() {return mMaxTimeForPrClosePref; }
 protected:
 
@@ -191,7 +189,7 @@ private:
 
     bool GrowActiveList();
     bool GrowIdleList();
-    void   InitMaxCount();
+    void InitMaxCount();
 
     // Total bytes number transfered through all the sockets except active ones
     uint64_t mSentBytesCount;
@@ -206,15 +204,12 @@ private:
     PRPollDesc *mPollList;                        /* mListSize + 1 entries */
 
     PRIntervalTime PollTimeout();            // computes ideal poll timeout
-    nsresult       DoPollIteration(TimeDuration *pollDuration);
+    nsresult       DoPollIteration();
                                              // perfoms a single poll iteration
-    int32_t        Poll(uint32_t *interval,
-                        TimeDuration *pollDuration);
+    int32_t        Poll(uint32_t *interval);
                                              // calls PR_Poll.  the out param
                                              // interval indicates the poll
                                              // duration in seconds.
-                                             // pollDuration is used only for
-                                             // telemetry
 
     //-------------------------------------------------------------------------
     // pending socket queue - see NotifyWhenCanAttachSocket
@@ -236,14 +231,8 @@ private:
 
     Atomic<bool>                    mServingPendingQueue;
     Atomic<int32_t, Relaxed>        mMaxTimePerPollIter;
-    Atomic<bool, Relaxed>           mTelemetryEnabledPref;
     Atomic<PRIntervalTime, Relaxed> mMaxTimeForPrClosePref;
 
-    // Between a computer going to sleep and waking up the PR_*** telemetry
-    // will be corrupted - so do not record it.
-    Atomic<bool, Relaxed>           mSleepPhase;
-    nsCOMPtr<nsITimer>              mAfterWakeUpTimer;
-
     void OnKeepaliveEnabledPrefChange();
     void NotifyKeepaliveEnabledPrefChange(SocketContext *sock);
 
diff --git a/netwerk/base/nsUDPSocket.cpp b/netwerk/base/nsUDPSocket.cpp
index 445b62d9c..06ecbf9ee 100644
--- a/netwerk/base/nsUDPSocket.cpp
+++ b/netwerk/base/nsUDPSocket.cpp
@@ -7,7 +7,6 @@
 #include "mozilla/EndianUtils.h"
 #include "mozilla/dom/TypedArray.h"
 #include "mozilla/HoldDropJSObjects.h"
-#include "mozilla/Telemetry.h"
 
 #include "nsSocketTransport2.h"
 #include "nsUDPSocket.h"
@@ -275,7 +274,6 @@ void
 nsUDPSocket::AddOutputBytes(uint64_t aBytes)
 {
   mByteWriteCount += aBytes;
-  SaveNetworkStats(false);
 }
 
 void
@@ -465,7 +463,6 @@ nsUDPSocket::OnSocketReady(PRFileDesc *fd, int16_t outFlags)
     return;
   }
   mByteReadCount += count;
-  SaveNetworkStats(false);
 
   FallibleTArray<uint8_t> data;
   if (!data.AppendElements(buff, count, fallible)) {
@@ -512,7 +509,6 @@ nsUDPSocket::OnSocketDetached(PRFileDesc *fd)
     NS_ASSERTION(mFD == fd, "wrong file descriptor");
     CloseSocket();
   }
-  SaveNetworkStats(true);
 
   if (mListener)
   {
@@ -726,7 +722,6 @@ nsUDPSocket::Close()
       // expects this happen synchronously.
       CloseSocket();
 
-      SaveNetworkStats(true);
       return NS_OK;
     }
   }
@@ -755,12 +750,6 @@ nsUDPSocket::GetLocalAddr(nsINetAddr * *aResult)
 }
 
 void
-nsUDPSocket::SaveNetworkStats(bool aEnforce)
-{
-  /*** STUB ***/
-}
-
-void
 nsUDPSocket::CloseSocket()
 {
   if (mFD) {
diff --git a/netwerk/base/nsUDPSocket.h b/netwerk/base/nsUDPSocket.h
index f8ae87cee..2910a49dd 100644
--- a/netwerk/base/nsUDPSocket.h
+++ b/netwerk/base/nsUDPSocket.h
@@ -53,8 +53,6 @@ private:
                                   const PRNetAddr& aIface);
   nsresult SetMulticastInterfaceInternal(const PRNetAddr& aIface);
 
-  void SaveNetworkStats(bool aEnforce);
-
   void CloseSocket();
 
   // lock protects access to mListener;
diff --git a/netwerk/cache2/CacheStorageService.cpp b/netwerk/cache2/CacheStorageService.cpp
index 85f364e4e..3ee1e15cd 100644
--- a/netwerk/cache2/CacheStorageService.cpp
+++ b/netwerk/cache2/CacheStorageService.cpp
@@ -964,8 +964,6 @@ CacheStorageService::RegisterEntry(CacheEntry* aEntry)
   if (mShutdown || !aEntry->CanRegister())
     return;
 
-  TelemetryRecordEntryCreation(aEntry);
-
   LOG(("CacheStorageService::RegisterEntry [entry=%p]", aEntry));
 
   MemoryPool& pool = Pool(aEntry->IsUsingDisk());
@@ -983,8 +981,6 @@ CacheStorageService::UnregisterEntry(CacheEntry* aEntry)
   if (!aEntry->IsRegistered())
     return;
 
-  TelemetryRecordEntryRemoval(aEntry);
-
   LOG(("CacheStorageService::UnregisterEntry [entry=%p]", aEntry));
 
   MemoryPool& pool = Pool(aEntry->IsUsingDisk());
@@ -2018,100 +2014,6 @@ uint32_t CacheStorageService::CacheQueueSize(bool highPriority)
   return thread->QueueSize(highPriority);
 }
 
-// Telementry collection
-
-namespace {
-
-bool TelemetryEntryKey(CacheEntry const* entry, nsAutoCString& key)
-{
-  nsAutoCString entryKey;
-  nsresult rv = entry->HashingKey(entryKey);
-  if (NS_FAILED(rv))
-    return false;
-
-  if (entry->GetStorageID().IsEmpty()) {
-    // Hopefully this will be const-copied, saves some memory
-    key = entryKey;
-  } else {
-    key.Assign(entry->GetStorageID());
-    key.Append(':');
-    key.Append(entryKey);
-  }
-
-  return true;
-}
-
-} // namespace
-
-void
-CacheStorageService::TelemetryPrune(TimeStamp &now)
-{
-  static TimeDuration const oneMinute = TimeDuration::FromSeconds(60);
-  static TimeStamp dontPruneUntil = now + oneMinute;
-  if (now < dontPruneUntil)
-    return;
-
-  static TimeDuration const fifteenMinutes = TimeDuration::FromSeconds(900);
-  for (auto iter = mPurgeTimeStamps.Iter(); !iter.Done(); iter.Next()) {
-    if (now - iter.Data() > fifteenMinutes) {
-      // We are not interested in resurrection of entries after 15 minutes
-      // of time.  This is also the limit for the telemetry.
-      iter.Remove();
-    }
-  }
-  dontPruneUntil = now + oneMinute;
-}
-
-void
-CacheStorageService::TelemetryRecordEntryCreation(CacheEntry const* entry)
-{
-  MOZ_ASSERT(CacheStorageService::IsOnManagementThread());
-
-  nsAutoCString key;
-  if (!TelemetryEntryKey(entry, key))
-    return;
-
-  TimeStamp now = TimeStamp::NowLoRes();
-  TelemetryPrune(now);
-
-  // When an entry is craeted (registered actually) we check if there is
-  // a timestamp marked when this very same cache entry has been removed
-  // (deregistered) because of over-memory-limit purging.  If there is such
-  // a timestamp found accumulate telemetry on how long the entry was away.
-  TimeStamp timeStamp;
-  if (!mPurgeTimeStamps.Get(key, &timeStamp))
-    return;
-
-  mPurgeTimeStamps.Remove(key);
-
-}
-
-void
-CacheStorageService::TelemetryRecordEntryRemoval(CacheEntry const* entry)
-{
-  MOZ_ASSERT(CacheStorageService::IsOnManagementThread());
-
-  // Doomed entries must not be considered, we are only interested in purged
-  // entries.  Note that the mIsDoomed flag is always set before deregistration
-  // happens.
-  if (entry->IsDoomed())
-    return;
-
-  nsAutoCString key;
-  if (!TelemetryEntryKey(entry, key))
-    return;
-
-  // When an entry is removed (deregistered actually) we put a timestamp for this
-  // entry to the hashtable so that when the entry is created (registered) again
-  // we know how long it was away.  Also accumulate number of AsyncOpen calls on
-  // the entry, this tells us how efficiently the pool actually works.
-
-  TimeStamp now = TimeStamp::NowLoRes();
-  TelemetryPrune(now);
-  mPurgeTimeStamps.Put(key, now);
-
-}
-
 // nsIMemoryReporter
 
 size_t
diff --git a/netwerk/cache2/CacheStorageService.h b/netwerk/cache2/CacheStorageService.h
index f40459d84..7e968e359 100644
--- a/netwerk/cache2/CacheStorageService.h
+++ b/netwerk/cache2/CacheStorageService.h
@@ -188,12 +188,6 @@ private:
   bool IsForcedValidEntry(nsACString const &aEntryKeyWithContext);
 
 private:
-  // These are helpers for telemetry monitoring of the memory pools.
-  void TelemetryPrune(TimeStamp &now);
-  void TelemetryRecordEntryCreation(CacheEntry const* entry);
-  void TelemetryRecordEntryRemoval(CacheEntry const* entry);
-
-private:
   // Following methods are thread safe to call.
   friend class CacheStorage;
 
@@ -370,12 +364,6 @@ private:
     uint32_t mWhat;
   };
 
-  // Used just for telemetry purposes, accessed only on the management thread.
-  // Note: not included in the memory reporter, this is not expected to be huge
-  // and also would be complicated to report since reporting happens on the main
-  // thread but this table is manipulated on the management thread.
-  nsDataHashtable<nsCStringHashKey, mozilla::TimeStamp> mPurgeTimeStamps;
-
   // nsICacheTesting
   class IOThreadSuspender : public Runnable
   {
diff --git a/netwerk/cookie/nsCookieService.cpp b/netwerk/cookie/nsCookieService.cpp
index 7bc5abcd1..6740f7310 100644
--- a/netwerk/cookie/nsCookieService.cpp
+++ b/netwerk/cookie/nsCookieService.cpp
@@ -49,7 +49,6 @@
 #include "mozilla/storage.h"
 #include "mozilla/AutoRestore.h"
 #include "mozilla/FileUtils.h"
-#include "mozilla/Telemetry.h"
 #include "nsIAppsService.h"
 #include "mozIApplication.h"
 #include "mozIApplicationClearPrivateDataParams.h"
@@ -120,15 +119,6 @@ static const char kPrefCookiePurgeAge[]       = "network.cookie.purgeAge";
 static const char kPrefThirdPartySession[]    = "network.cookie.thirdparty.sessionOnly";
 static const char kCookieLeaveSecurityAlone[] = "network.cookie.leave-secure-alone";
 
-// For telemetry COOKIE_LEAVE_SECURE_ALONE
-#define BLOCKED_SECURE_SET_FROM_HTTP 0
-#define BLOCKED_DOWNGRADE_SECURE     1
-#define DOWNGRADE_SECURE_FROM_SECURE 2
-#define EVICTED_NEWER_INSECURE       3
-#define EVICTED_OLDEST_COOKIE        4
-#define EVICTED_PREFERRED_COOKIE     5
-#define EVICTING_SECURE_BLOCKED      6
-
 static void
 bindCookieParameters(mozIStorageBindingParamsArray *aParamsArray,
                      const nsCookieKey &aKey,
@@ -3592,9 +3582,6 @@ nsCookieService::AddInternal(const nsCookieKey             &aKey,
       MOZ_ASSERT(iter.entry);
 
       oldCookie = iter.Cookie();
-      if (oldestCookieTime > 0 && mLeaveSecureAlone) {
-        TelemetryForEvictingStaleCookie(oldCookie, oldestCookieTime);
-      }
 
       // remove the oldest cookie from the domain
       RemoveCookieFromList(iter);
@@ -4619,13 +4606,6 @@ nsCookieService::FindStaleCookie(nsCookieEntry *aEntry,
   return actualOldestCookieTime;
 }
 
-void
-nsCookieService::TelemetryForEvictingStaleCookie(nsCookie *aEvicted,
-                                                 int64_t oldestCookieTime)
-{
-  /* STUB */
-}
-
 // count the number of cookies stored by a particular host. this is provided by the
 // nsICookieManager2 interface.
 NS_IMETHODIMP
diff --git a/netwerk/cookie/nsCookieService.h b/netwerk/cookie/nsCookieService.h
index e3b2d3e8a..185f0b492 100644
--- a/netwerk/cookie/nsCookieService.h
+++ b/netwerk/cookie/nsCookieService.h
@@ -314,7 +314,6 @@ class nsCookieService final : public nsICookieService
     bool                          FindCookie(const nsCookieKey& aKey, const nsAFlatCString &aHost, const nsAFlatCString &aName, const nsAFlatCString &aPath, nsListIter &aIter);
     bool                          FindSecureCookie(const nsCookieKey& aKey, nsCookie* aCookie);
     int64_t                       FindStaleCookie(nsCookieEntry *aEntry, int64_t aCurrentTime, nsIURI* aSource, mozilla::Maybe<bool> aIsSecure, nsListIter &aIter);
-    void                          TelemetryForEvictingStaleCookie(nsCookie* aEvicted, int64_t oldestCookieTime);
     void                          NotifyRejected(nsIURI *aHostURI);
     void                          NotifyThirdParty(nsIURI *aHostURI, bool aAccepted, nsIChannel *aChannel);
     void                          NotifyChanged(nsISupports *aSubject, const char16_t *aData);
diff --git a/netwerk/dns/nsHostResolver.cpp b/netwerk/dns/nsHostResolver.cpp
index c4883ab29..323470c34 100644
--- a/netwerk/dns/nsHostResolver.cpp
+++ b/netwerk/dns/nsHostResolver.cpp
@@ -32,7 +32,6 @@
 
 #include "mozilla/HashFunctions.h"
 #include "mozilla/TimeStamp.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/DebugOnly.h"
 #include "mozilla/Preferences.h"
 
@@ -1419,7 +1418,6 @@ nsHostResolver::ThreadFunc(void *arg)
         LOG(("DNS lookup thread - Calling getaddrinfo for host [%s%s%s].\n",
              LOG_HOST(rec->host, rec->netInterface)));
 
-        TimeStamp startTime = TimeStamp::Now();
 #if TTL_AVAILABLE
         bool getTtl = rec->mGetTtl;
 #else
diff --git a/netwerk/protocol/http/Http2Stream.cpp b/netwerk/protocol/http/Http2Stream.cpp
index 3471985dd..581ebe016 100644
--- a/netwerk/protocol/http/Http2Stream.cpp
+++ b/netwerk/protocol/http/Http2Stream.cpp
@@ -657,12 +657,6 @@ Http2Stream::GenerateOpen()
     outputOffset += frameLen;
   }
 
-  // The size of the input headers is approximate
-  uint32_t ratio =
-    compressedData.Length() * 100 /
-    (11 + requestURI.Length() +
-     mFlatHttpRequestHeaders.Length());
-
   mFlatHttpRequestHeaders.Truncate();
   return NS_OK;
 }
@@ -980,7 +974,7 @@ Http2Stream::GenerateDataFrameHeader(uint32_t dataLength, bool lastFrame)
 }
 
 // ConvertResponseHeaders is used to convert the response headers
-// into HTTP/1 format and report some telemetry
+// into HTTP/1 format
 nsresult
 Http2Stream::ConvertResponseHeaders(Http2Decompressor *decompressor,
                                     nsACString &aHeadersIn,
@@ -1036,7 +1030,7 @@ Http2Stream::ConvertResponseHeaders(Http2Decompressor *decompressor,
 }
 
 // ConvertPushHeaders is used to convert the pushed request headers
-// into HTTP/1 format and report some telemetry
+// into HTTP/1 format
 nsresult
 Http2Stream::ConvertPushHeaders(Http2Decompressor *decompressor,
                                 nsACString &aHeadersIn,
diff --git a/netwerk/protocol/http/HttpBaseChannel.cpp b/netwerk/protocol/http/HttpBaseChannel.cpp
index 21b661c2b..9e43d89e0 100644
--- a/netwerk/protocol/http/HttpBaseChannel.cpp
+++ b/netwerk/protocol/http/HttpBaseChannel.cpp
@@ -996,16 +996,6 @@ HttpBaseChannel::DoApplyContentConversions(nsIStreamListener* aNextListener,
       }
 
       LOG(("converter removed '%s' content-encoding\n", val));
-      if (gHttpHandler->IsTelemetryEnabled()) {
-        int mode = 0;
-        if (from.Equals("gzip") || from.Equals("x-gzip")) {
-          mode = 1;
-        } else if (from.Equals("deflate") || from.Equals("x-deflate")) {
-          mode = 2;
-        } else if (from.Equals("br")) {
-          mode = 3;
-        }
-      }
       nextListener = converter;
     }
     else {
diff --git a/netwerk/protocol/http/nsHttpChannel.cpp b/netwerk/protocol/http/nsHttpChannel.cpp
index be5539a02..a890c51b3 100644
--- a/netwerk/protocol/http/nsHttpChannel.cpp
+++ b/netwerk/protocol/http/nsHttpChannel.cpp
@@ -83,7 +83,6 @@
 #include "nsCRT.h"
 #include "CacheObserver.h"
 #include "mozilla/dom/Performance.h"
-#include "mozilla/Telemetry.h"
 #include "AlternateServices.h"
 #include "InterceptedChannel.h"
 #include "nsIHttpPushListener.h"
@@ -123,19 +122,6 @@ static NS_DEFINE_CID(kStreamListenerTeeCID, NS_STREAMLISTENERTEE_CID);
 static NS_DEFINE_CID(kStreamTransportServiceCID,
                      NS_STREAMTRANSPORTSERVICE_CID);
 
-enum CacheDisposition {
-    kCacheHit = 1,
-    kCacheHitViaReval = 2,
-    kCacheMissedViaReval = 3,
-    kCacheMissed = 4
-};
-
-void
-AccumulateCacheHitTelemetry(CacheDisposition hitOrMiss)
-{
-  /* STUB */
-}
-
 // Computes and returns a SHA1 hash of the input buffer. The input buffer
 // must be a null-terminated string.
 nsresult
@@ -494,11 +480,6 @@ nsHttpChannel::ContinueConnect()
                 event->Revoke();
             }
 
-            // Don't accumulate the cache hit telemetry for intercepted channels.
-            if (mInterceptCache != INTERCEPTED) {
-                AccumulateCacheHitTelemetry(kCacheHit);
-            }
-
             return rv;
         }
         else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
@@ -1085,10 +1066,8 @@ ProcessXCTO(nsIURI* aURI, nsHttpResponseHead* aResponseHead, nsILoadInfo* aLoadI
 
     if (aLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_IMAGE) {
         if (StringBeginsWith(contentType, NS_LITERAL_CSTRING("image/"))) {
-            Accumulate(Telemetry::XCTO_NOSNIFF_BLOCK_IMAGE, 0);
             return NS_OK;
         }
-        Accumulate(Telemetry::XCTO_NOSNIFF_BLOCK_IMAGE, 1);
         // Instead of consulting Preferences::GetBool() all the time we
         // can cache the result to speed things up.
         static bool sXCTONosniffBlockImages = false;
@@ -2116,29 +2095,6 @@ nsHttpChannel::ContinueProcessResponse2(nsresult rv)
         break;
     }
 
-    if (gHttpHandler->IsTelemetryEnabled()) {
-        CacheDisposition cacheDisposition;
-        if (!mDidReval) {
-            cacheDisposition = kCacheMissed;
-        } else if (successfulReval) {
-            cacheDisposition = kCacheHitViaReval;
-        } else {
-            cacheDisposition = kCacheMissedViaReval;
-        }
-        AccumulateCacheHitTelemetry(cacheDisposition);
-
-        if (mResponseHead->Version() == NS_HTTP_VERSION_0_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;
-            }
-        }
-    }
     return rv;
 }
 
@@ -3784,8 +3740,6 @@ nsHttpChannel::OnCacheEntryCheck(nsICacheEntry* entry, nsIApplicationCache* appC
              (!mCachedResponseHead->ExpiresInPast() ||
               !mCachedResponseHead->MustValidateIfExpired())) {
         LOG(("NOT validating based on isForcedValid being true.\n"));
-        Telemetry::AutoCounter<Telemetry::PREDICTOR_TOTAL_PREFETCHES_USED> used;
-        ++used;
         doValidation = false;
     }
     // If the LOAD_FROM_CACHE flag is set, any cached data can simply be used
@@ -6546,8 +6500,6 @@ nsHttpChannel::OnStopRequest(nsIRequest *request, nsISupports *ctxt, nsresult st
 
     if (mTimingEnabled && request == mCachePump) {
         mCacheReadEnd = TimeStamp::Now();
-
-        ReportNetVSCacheTelemetry();
     }
 
     // allow content to be cached if it was loaded successfully (bug #482935)
@@ -8104,12 +8056,5 @@ nsHttpChannel::SetDoNotTrack()
   }
 }
 
-
-void
-nsHttpChannel::ReportNetVSCacheTelemetry()
-{
-  /* STUB */
-}
-
 } // namespace net
 } // namespace mozilla
diff --git a/netwerk/protocol/http/nsHttpChannel.h b/netwerk/protocol/http/nsHttpChannel.h
index 152cf1503..554875b1c 100644
--- a/netwerk/protocol/http/nsHttpChannel.h
+++ b/netwerk/protocol/http/nsHttpChannel.h
@@ -431,9 +431,6 @@ private:
                rv == NS_ERROR_MALFORMED_URI;
     }
 
-    // Report net vs cache time telemetry
-    void ReportNetVSCacheTelemetry();
-
     // Create a aggregate set of the current notification callbacks
     // and ensure the transaction is updated to use it.
     void UpdateAggregateCallbacks();
diff --git a/netwerk/protocol/http/nsHttpConnectionMgr.cpp b/netwerk/protocol/http/nsHttpConnectionMgr.cpp
index 731cdff39..907f33436 100644
--- a/netwerk/protocol/http/nsHttpConnectionMgr.cpp
+++ b/netwerk/protocol/http/nsHttpConnectionMgr.cpp
@@ -35,8 +35,6 @@
 #include "mozilla/Unused.h"
 #include "nsIURI.h"
 
-#include "mozilla/Telemetry.h"
-
 namespace mozilla {
 namespace net {
 
@@ -1186,14 +1184,6 @@ nsHttpConnectionMgr::MakeNewConnection(nsConnectionEntry *ent,
                 transport->SetConnectionFlags(flags);
             }
 
-            Telemetry::AutoCounter<Telemetry::HTTPCONNMGR_USED_SPECULATIVE_CONN> usedSpeculativeConn;
-            ++usedSpeculativeConn;
-
-            if (ent->mHalfOpens[i]->IsFromPredictor()) {
-              Telemetry::AutoCounter<Telemetry::PREDICTOR_TOTAL_PRECONNECTS_USED> totalPreconnectsUsed;
-              ++totalPreconnectsUsed;
-            }
-
             // return OK because we have essentially opened a new connection
             // by converting a speculative half-open to general use
             return NS_OK;
@@ -1387,14 +1377,6 @@ nsHttpConnectionMgr::AddToShortestPipeline(nsConnectionEntry *ent,
         ent->SetYellowConnection(bestConn);
 
     if (!trans->GetPendingTime().IsNull()) {
-        if (trans->UsesPipelining())
-            AccumulateTimeDelta(
-                Telemetry::TRANSACTION_WAIT_TIME_HTTP_PIPELINES,
-                trans->GetPendingTime(), TimeStamp::Now());
-        else
-            AccumulateTimeDelta(
-                Telemetry::TRANSACTION_WAIT_TIME_HTTP,
-                trans->GetPendingTime(), TimeStamp::Now());
         trans->SetPendingTime(false);
     }
     return true;
@@ -1677,8 +1659,6 @@ nsHttpConnectionMgr::DispatchTransaction(nsConnectionEntry *ent,
         rv = conn->Activate(trans, caps, priority);
         MOZ_ASSERT(NS_SUCCEEDED(rv), "SPDY Cannot Fail Dispatch");
         if (NS_SUCCEEDED(rv) && !trans->GetPendingTime().IsNull()) {
-            AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_SPDY,
-                trans->GetPendingTime(), TimeStamp::Now());
             trans->SetPendingTime(false);
         }
         return rv;
@@ -1695,12 +1675,6 @@ nsHttpConnectionMgr::DispatchTransaction(nsConnectionEntry *ent,
     rv = DispatchAbstractTransaction(ent, trans, caps, conn, priority);
 
     if (NS_SUCCEEDED(rv) && !trans->GetPendingTime().IsNull()) {
-        if (trans->UsesPipelining())
-            AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_HTTP_PIPELINES,
-                trans->GetPendingTime(), TimeStamp::Now());
-        else
-            AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_HTTP,
-                trans->GetPendingTime(), TimeStamp::Now());
         trans->SetPendingTime(false);
     }
     return rv;
@@ -1829,12 +1803,6 @@ nsHttpConnectionMgr::BuildPipeline(nsConnectionEntry *ent,
     return NS_OK;
 }
 
-void
-nsHttpConnectionMgr::ReportProxyTelemetry(nsConnectionEntry *ent)
-{
-  /* STUB */
-}
-
 nsresult
 nsHttpConnectionMgr::ProcessNewTransaction(nsHttpTransaction *trans)
 {
@@ -1878,8 +1846,6 @@ nsHttpConnectionMgr::ProcessNewTransaction(nsHttpTransaction *trans)
         ent = preferredEntry;
     }
 
-    ReportProxyTelemetry(ent);
-
     // Check if the transaction already has a sticky reference to a connection.
     // If so, then we can just use it directly by transferring its reference
     // to the new connection variable instead of searching for a new one
@@ -1976,13 +1942,9 @@ nsHttpConnectionMgr::CreateTransport(nsConnectionEntry *ent,
     if (speculative) {
         sock->SetSpeculative(true);
         sock->SetAllow1918(allow1918);
-        Telemetry::AutoCounter<Telemetry::HTTPCONNMGR_TOTAL_SPECULATIVE_CONN> totalSpeculativeConn;
-        ++totalSpeculativeConn;
 
         if (isFromPredictor) {
           sock->SetIsFromPredictor(true);
-          Telemetry::AutoCounter<Telemetry::PREDICTOR_TOTAL_PRECONNECTS_CREATED> totalPreconnectsCreated;
-          ++totalPreconnectsCreated;
         }
     }
 
@@ -3894,16 +3856,6 @@ nsConnectionEntry::RemoveHalfOpen(nsHalfOpenSocket *halfOpen)
     // will result in it not being present in the halfopen table. That's expected.
     if (mHalfOpens.RemoveElement(halfOpen)) {
 
-        if (halfOpen->IsSpeculative()) {
-            Telemetry::AutoCounter<Telemetry::HTTPCONNMGR_UNUSED_SPECULATIVE_CONN> unusedSpeculativeConn;
-            ++unusedSpeculativeConn;
-
-            if (halfOpen->IsFromPredictor()) {
-                Telemetry::AutoCounter<Telemetry::PREDICTOR_TOTAL_PRECONNECTS_UNUSED> totalPreconnectsUnused;
-                ++totalPreconnectsUnused;
-            }
-        }
-
         MOZ_ASSERT(gHttpHandler->ConnMgr()->mNumHalfOpenConns);
         if (gHttpHandler->ConnMgr()->mNumHalfOpenConns) { // just in case
             gHttpHandler->ConnMgr()->mNumHalfOpenConns--;
diff --git a/netwerk/protocol/http/nsHttpConnectionMgr.h b/netwerk/protocol/http/nsHttpConnectionMgr.h
index 7ca2a2b28..a2c88c402 100644
--- a/netwerk/protocol/http/nsHttpConnectionMgr.h
+++ b/netwerk/protocol/http/nsHttpConnectionMgr.h
@@ -529,7 +529,6 @@ private:
     nsresult ProcessNewTransaction(nsHttpTransaction *);
     nsresult EnsureSocketThreadTarget();
     void     ClosePersistentConnections(nsConnectionEntry *ent);
-    void     ReportProxyTelemetry(nsConnectionEntry *ent);
     nsresult CreateTransport(nsConnectionEntry *, nsAHttpTransaction *,
                              uint32_t, bool, bool, bool);
     void     AddActiveConn(nsHttpConnection *, nsConnectionEntry *);
diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp
index 6d58a7004..477961454 100644
--- a/netwerk/protocol/http/nsHttpHandler.cpp
+++ b/netwerk/protocol/http/nsHttpHandler.cpp
@@ -90,7 +90,6 @@
 #define BROWSER_PREF_PREFIX     "browser.cache."
 #define DONOTTRACK_HEADER_ENABLED "privacy.donottrackheader.enabled"
 #define H2MANDATORY_SUITE        "security.ssl3.ecdhe_rsa_aes_128_gcm_sha256"
-#define TELEMETRY_ENABLED        "toolkit.telemetry.enabled"
 #define ALLOW_EXPERIMENTS        "network.allow-experiments"
 #define SAFE_HINT_HEADER_VALUE   "safeHint.enabled"
 #define SECURITY_PREFIX          "security."
@@ -209,7 +208,6 @@ nsHttpHandler::nsHttpHandler()
     , mSafeHintEnabled(false)
     , mParentalControlEnabled(false)
     , mHandlerActive(false)
-    , mTelemetryEnabled(false)
     , mAllowExperiments(true)
     , mDebugObservations(false)
     , mEnableSpdy(false)
@@ -305,7 +303,6 @@ nsHttpHandler::Init()
         prefBranch->AddObserver(INTL_ACCEPT_LANGUAGES, this, true);
         prefBranch->AddObserver(BROWSER_PREF("disk_cache_ssl"), this, true);
         prefBranch->AddObserver(DONOTTRACK_HEADER_ENABLED, this, true);
-        prefBranch->AddObserver(TELEMETRY_ENABLED, this, true);
         prefBranch->AddObserver(H2MANDATORY_SUITE, this, true);
         prefBranch->AddObserver(HTTP_PREF("tcp_keepalive.short_lived_connections"), this, true);
         prefBranch->AddObserver(HTTP_PREF("tcp_keepalive.long_lived_connections"), this, true);
@@ -1547,19 +1544,6 @@ nsHttpHandler::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
     // includes telemetry and allow-experiments because of the abtest profile
     bool requestTokenBucketUpdated = false;
 
-    //
-    // Telemetry
-    //
-
-    if (PREF_CHANGED(TELEMETRY_ENABLED)) {
-        cVar = false;
-        requestTokenBucketUpdated = true;
-        rv = prefs->GetBoolPref(TELEMETRY_ENABLED, &cVar);
-        if (NS_SUCCEEDED(rv)) {
-            mTelemetryEnabled = cVar;
-        }
-    }
-
     // "security.ssl3.ecdhe_rsa_aes_128_gcm_sha256" is the required h2 interop
     // suite.
 
diff --git a/netwerk/protocol/http/nsHttpHandler.h b/netwerk/protocol/http/nsHttpHandler.h
index 848dd25b1..983d069af 100644
--- a/netwerk/protocol/http/nsHttpHandler.h
+++ b/netwerk/protocol/http/nsHttpHandler.h
@@ -105,8 +105,7 @@ public:
     bool           EnforceAssocReq()         { return mEnforceAssocReq; }
 
     bool           IsPersistentHttpsCachingEnabled() { return mEnablePersistentHttpsCaching; }
-    bool           IsTelemetryEnabled() { return mTelemetryEnabled; }
-    bool           AllowExperiments() { return mTelemetryEnabled && mAllowExperiments; }
+    bool           AllowExperiments() { return mAllowExperiments; }
 
     bool           IsSpdyEnabled() { return mEnableSpdy; }
     bool           IsHttp2Enabled() { return mHttp2Enabled; }
@@ -509,9 +508,6 @@ private:
     // true in between init and shutdown states
     Atomic<bool, Relaxed> mHandlerActive;
 
-    // Whether telemetry is reported or not
-    uint32_t           mTelemetryEnabled : 1;
-
     // The value of network.allow-experiments
     uint32_t           mAllowExperiments : 1;