diff --git a/xpcom/base/CycleCollectedJSRuntime.cpp b/xpcom/base/CycleCollectedJSRuntime.cpp
index 7660398e2..2c86c2fd2 100644
--- a/xpcom/base/CycleCollectedJSRuntime.cpp
+++ b/xpcom/base/CycleCollectedJSRuntime.cpp
@@ -60,7 +60,6 @@
 #include "mozilla/AutoRestore.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/Snprintf.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/DebuggerOnGCRunnable.h"
 #include "mozilla/dom/DOMJSClass.h"
 #include "mozilla/dom/Promise.h"
@@ -1241,7 +1240,6 @@ IncrementalFinalizeRunnable::Run()
   }
 
   uint32_t duration = (uint32_t)((TimeStamp::Now() - start).ToMilliseconds());
-  Telemetry::Accumulate(Telemetry::DEFERRED_FINALIZE_ASYNC, duration);
 
   return NS_OK;
 }
diff --git a/xpcom/base/nsCycleCollector.cpp b/xpcom/base/nsCycleCollector.cpp
index eb7e195f2..02655692d 100644
--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -185,7 +185,6 @@
 #include "mozilla/AutoGlobalTimelineMarker.h"
 #include "mozilla/Likely.h"
 #include "mozilla/PoisonIOInterposer.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/ThreadLocal.h"
 
 using namespace mozilla;
@@ -528,15 +527,6 @@ public:
 #define CC_GRAPH_ASSERT(b)
 #endif
 
-#define CC_TELEMETRY(_name, _value)                                            \
-    PR_BEGIN_MACRO                                                             \
-    if (NS_IsMainThread()) {                                                   \
-      Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR##_name, _value);        \
-    } else {                                                                   \
-      Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_WORKER##_name, _value); \
-    }                                                                          \
-    PR_END_MACRO
-
 enum NodeColor { black, white, grey };
 
 // This structure should be kept as small as possible; we may expect
@@ -2951,7 +2941,6 @@ nsCycleCollector::ScanWeakMaps()
 
   if (failed) {
     MOZ_ASSERT(false, "Ran out of memory in ScanWeakMaps");
-    CC_TELEMETRY(_OOM, true);
   }
 }
 
@@ -3094,7 +3083,6 @@ nsCycleCollector::ScanIncrementalRoots()
 
   if (failed) {
     NS_ASSERTION(false, "Ran out of memory in ScanIncrementalRoots");
-    CC_TELEMETRY(_OOM, true);
   }
 }
 
@@ -3155,7 +3143,6 @@ nsCycleCollector::ScanBlackNodes()
 
   if (failed) {
     NS_ASSERTION(false, "Ran out of memory in ScanBlackNodes");
-    CC_TELEMETRY(_OOM, true);
   }
 }
 
@@ -3480,7 +3467,6 @@ nsCycleCollector::FixGrayBits(bool aForceGC, TimeLog& aTimeLog)
 
     bool needGC = !mJSRuntime->AreGCGrayBitsValid();
     // Only do a telemetry ping for non-shutdown CCs.
-    CC_TELEMETRY(_NEED_GC, needGC);
     if (!needGC) {
       return;
     }
@@ -3532,12 +3518,6 @@ nsCycleCollector::CleanupAfterCollection()
   printf(".\ncc: \n");
 #endif
 
-  CC_TELEMETRY( , interval);
-  CC_TELEMETRY(_VISITED_REF_COUNTED, mResults.mVisitedRefCounted);
-  CC_TELEMETRY(_VISITED_GCED, mResults.mVisitedGCed);
-  CC_TELEMETRY(_COLLECTED, mWhiteNodeCount);
-  timeLog.Checkpoint("CleanupAfterCollection::telemetry");
-
   if (mJSRuntime) {
     mJSRuntime->FinalizeDeferredThings(mResults.mAnyManual
                                        ? CycleCollectedJSRuntime::FinalizeNow
diff --git a/xpcom/base/nsMemoryReporterManager.cpp b/xpcom/base/nsMemoryReporterManager.cpp
index 9451f37da..ed48b0f0b 100644
--- a/xpcom/base/nsMemoryReporterManager.cpp
+++ b/xpcom/base/nsMemoryReporterManager.cpp
@@ -26,7 +26,6 @@
 #include "mozilla/Preferences.h"
 #include "mozilla/Scoped.h"
 #include "mozilla/Services.h"
-#include "mozilla/Telemetry.h"
 #include "mozilla/dom/PMemoryReportRequestParent.h" // for dom::MemoryReport
 #include "mozilla/dom/ContentParent.h"
 #include "mozilla/ipc/FileDescriptorUtils.h"
@@ -439,7 +438,6 @@ ResidentDistinguishedAmountHelper(int64_t* aN, bool aDoPurge)
 #ifdef HAVE_JEMALLOC_STATS
 #ifndef MOZ_JEMALLOC4
   if (aDoPurge) {
-    Telemetry::AutoTimer<Telemetry::MEMORY_FREE_PURGED_PAGES_MS> timer;
     jemalloc_purge_freed_pages();
   }
 #endif
diff --git a/xpcom/threads/BackgroundHangMonitor.cpp b/xpcom/threads/BackgroundHangMonitor.cpp
index a0fc336da..96afdcd38 100644
--- a/xpcom/threads/BackgroundHangMonitor.cpp
+++ b/xpcom/threads/BackgroundHangMonitor.cpp
@@ -214,6 +214,9 @@ BackgroundHangManager::BackgroundHangManager()
   , mLock("BackgroundHangManager")
   , mIntervalNow(0)
 {
+#if(0)
+// The BackgroundHangMonitor is irrelevant in TenFourFox since we don't
+// have telemetry or anything useful to collect from it.
   // Lock so we don't race against the new monitor thread
   MonitorAutoLock autoLock(mLock);
   mHangMonitorThread = PR_CreateThread(
@@ -221,6 +224,7 @@ BackgroundHangManager::BackgroundHangManager()
     PR_PRIORITY_LOW, PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
 
   MOZ_ASSERT(mHangMonitorThread, "Failed to create monitor thread");
+#endif
 }
 
 BackgroundHangManager::~BackgroundHangManager()