diff --git a/xpcom/base/CycleCollectedJSContext.cpp b/xpcom/base/CycleCollectedJSContext.cpp
index bf832b965cfb..da2f54d001cb 100644
--- a/xpcom/base/CycleCollectedJSContext.cpp
+++ b/xpcom/base/CycleCollectedJSContext.cpp
@@ -37,10 +37,6 @@
 #include "nsWrapperCache.h"
 #include "nsStringBuffer.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsExceptionHandler.h"
-#endif
-
 #include "nsIException.h"
 #include "nsIPlatformInfo.h"
 #include "nsThread.h"
diff --git a/xpcom/base/CycleCollectedJSRuntime.cpp b/xpcom/base/CycleCollectedJSRuntime.cpp
index 03a3e9018019..319ff1bac656 100644
--- a/xpcom/base/CycleCollectedJSRuntime.cpp
+++ b/xpcom/base/CycleCollectedJSRuntime.cpp
@@ -81,6 +81,7 @@
 #include "nsCycleCollectionParticipant.h"
 #include "nsCycleCollector.h"
 #include "nsDOMJSUtils.h"
+#include "nsExceptionHandler.h"
 #include "nsJSUtils.h"
 #include "nsWrapperCache.h"
 #include "nsStringBuffer.h"
@@ -90,10 +91,6 @@
 #include "ProfilerMarkerPayload.h"
 #endif
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsExceptionHandler.h"
-#endif
-
 #include "nsIException.h"
 #include "nsIPlatformInfo.h"
 #include "nsThread.h"
@@ -545,10 +542,9 @@ CycleCollectedJSRuntime::CycleCollectedJSRuntime(JSContext* aCx)
   JS_SetExternalStringSizeofCallback(aCx, SizeofExternalStringCallback);
   JS::SetBuildIdOp(aCx, GetBuildId);
   JS::SetWarningReporter(aCx, MozCrashWarningReporter);
-#ifdef MOZ_CRASHREPORTER
-    js::AutoEnterOOMUnsafeRegion::setAnnotateOOMAllocationSizeCallback(
-            CrashReporter::AnnotateOOMAllocationSize);
-#endif
+
+  js::AutoEnterOOMUnsafeRegion::setAnnotateOOMAllocationSizeCallback(
+    CrashReporter::AnnotateOOMAllocationSize);
 
   static js::DOMCallbacks DOMcallbacks = {
     InstanceClassHasProtoAtDepth
@@ -1447,7 +1443,6 @@ CycleCollectedJSRuntime::AnnotateAndSetOutOfMemory(OOMState* aStatePtr,
                                                    OOMState aNewState)
 {
   *aStatePtr = aNewState;
-#ifdef MOZ_CRASHREPORTER
   CrashReporter::AnnotateCrashReport(aStatePtr == &mOutOfMemoryState
                                      ? NS_LITERAL_CSTRING("JSOutOfMemory")
                                      : NS_LITERAL_CSTRING("JSLargeAllocationFailure"),
@@ -1456,7 +1451,6 @@ CycleCollectedJSRuntime::AnnotateAndSetOutOfMemory(OOMState* aStatePtr,
                                      : aNewState == OOMState::Reported
                                      ? NS_LITERAL_CSTRING("Reported")
                                      : NS_LITERAL_CSTRING("Recovered"));
-#endif
 }
 
 void
@@ -1469,14 +1463,12 @@ CycleCollectedJSRuntime::OnGC(JSContext* aContext,
       mZonesWaitingForGC.Clear();
       break;
     case JSGC_END: {
-#ifdef MOZ_CRASHREPORTER
       if (mOutOfMemoryState == OOMState::Reported) {
         AnnotateAndSetOutOfMemory(&mOutOfMemoryState, OOMState::Recovered);
       }
       if (mLargeAllocationFailureState == OOMState::Reported) {
         AnnotateAndSetOutOfMemory(&mLargeAllocationFailureState, OOMState::Recovered);
       }
-#endif
 
       // Do any deferred finalization of native objects. Normally we do this
       // incrementally for an incremental GC, and immediately for a
diff --git a/xpcom/base/nsCrashOnException.cpp b/xpcom/base/nsCrashOnException.cpp
index 0f8042531fda..9c42ad02d8bd 100644
--- a/xpcom/base/nsCrashOnException.cpp
+++ b/xpcom/base/nsCrashOnException.cpp
@@ -6,24 +6,21 @@
 
 #include "nsCrashOnException.h"
 #include "nsCOMPtr.h"
+#include "nsICrashReporter.h"
 #include "nsServiceManagerUtils.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsICrashReporter.h"
-#endif
 
 namespace mozilla {
 
 static int
 ReportException(EXCEPTION_POINTERS* aExceptionInfo)
 {
-#ifdef MOZ_CRASHREPORTER
   nsCOMPtr<nsICrashReporter> cr =
     do_GetService("@mozilla.org/toolkit/crash-reporter;1");
   if (cr) {
     cr->WriteMinidumpForException(aExceptionInfo);
   }
-#endif
+
   return EXCEPTION_EXECUTE_HANDLER;
 }
 
diff --git a/xpcom/base/nsCycleCollector.cpp b/xpcom/base/nsCycleCollector.cpp
index f51d2fe6e266..2ddb40864bab 100644
--- a/xpcom/base/nsCycleCollector.cpp
+++ b/xpcom/base/nsCycleCollector.cpp
@@ -167,6 +167,7 @@
 #include "nsCycleCollectionParticipant.h"
 #include "nsCycleCollectionNoteRootCallback.h"
 #include "nsDeque.h"
+#include "nsExceptionHandler.h"
 #include "nsCycleCollector.h"
 #include "nsThreadUtils.h"
 #include "nsXULAppAPI.h"
@@ -191,10 +192,6 @@
 #include "mozilla/Telemetry.h"
 #include "mozilla/ThreadLocal.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsExceptionHandler.h"
-#endif
-
 using namespace mozilla;
 
 struct NurseryPurpleBufferEntry
@@ -668,14 +665,12 @@ PtrInfo::AnnotatedReleaseAssert(bool aCondition, const char* aMessage)
     return;
   }
 
-#ifdef MOZ_CRASHREPORTER
   const char* piName = "Unknown";
   if (mParticipant) {
     piName = mParticipant->ClassName();
   }
   nsPrintfCString msg("%s, for class %s", aMessage, piName);
   CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("CycleCollector"), msg);
-#endif
 
   MOZ_CRASH();
 }
diff --git a/xpcom/base/nsDebugImpl.cpp b/xpcom/base/nsDebugImpl.cpp
index a81528a349c0..ff2bb299f29c 100644
--- a/xpcom/base/nsDebugImpl.cpp
+++ b/xpcom/base/nsDebugImpl.cpp
@@ -13,9 +13,7 @@
 #include "MainThreadUtils.h"
 #include "nsDebugImpl.h"
 #include "nsDebug.h"
-#ifdef MOZ_CRASHREPORTER
-# include "nsExceptionHandler.h"
-#endif
+#include "nsExceptionHandler.h"
 #include "nsString.h"
 #include "nsXULAppAPI.h"
 #include "prprf.h"
@@ -392,7 +390,6 @@ NS_DebugBreak(uint32_t aSeverity, const char* aStr, const char* aExpr,
       return;
 
     case NS_DEBUG_ABORT: {
-#if defined(MOZ_CRASHREPORTER)
       // Updating crash annotations in the child causes us to do IPC. This can
       // really cause trouble if we're asserting from within IPC code. So we
       // have to do without the annotations in that case.
@@ -406,7 +403,6 @@ NS_DebugBreak(uint32_t aSeverity, const char* aStr, const char* aExpr,
         CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("AbortMessage"),
                                            nsDependentCString(nonPIDBuf.buffer));
       }
-#endif  // MOZ_CRASHREPORTER
 
 #if defined(DEBUG) && defined(_WIN32)
       RealBreak();
@@ -614,8 +610,6 @@ NS_ErrorAccordingToNSPR()
 void
 NS_ABORT_OOM(size_t aSize)
 {
-#if defined(MOZ_CRASHREPORTER)
   CrashReporter::AnnotateOOMAllocationSize(aSize);
-#endif
   MOZ_CRASH("OOM");
 }
diff --git a/xpcom/base/nsObjCExceptions.h b/xpcom/base/nsObjCExceptions.h
index e63c92af5786..d6c1ee1a994e 100644
--- a/xpcom/base/nsObjCExceptions.h
+++ b/xpcom/base/nsObjCExceptions.h
@@ -17,7 +17,7 @@
 #import <ExceptionHandling/NSExceptionHandler.h>
 #endif
 
-#if defined(MOZ_CRASHREPORTER) && defined(__cplusplus)
+#if defined(__cplusplus)
 #include "nsICrashReporter.h"
 #include "nsCOMPtr.h"
 #include "nsServiceManagerUtils.h"
@@ -47,7 +47,7 @@ nsObjCExceptionLog(NSException* aException)
   NSLog(@"Mozilla has caught an Obj-C exception [%@: %@]",
         [aException name], [aException reason]);
 
-#if defined(MOZ_CRASHREPORTER) && defined(__cplusplus)
+#if defined(__cplusplus)
   // Attach exception info to the crash report.
   nsCOMPtr<nsICrashReporter> crashReporter =
     do_GetService("@mozilla.org/toolkit/crash-reporter;1");
diff --git a/xpcom/build/nsXULAppAPI.h b/xpcom/build/nsXULAppAPI.h
index 881596cf0cb2..80546d1bacce 100644
--- a/xpcom/build/nsXULAppAPI.h
+++ b/xpcom/build/nsXULAppAPI.h
@@ -403,7 +403,6 @@ XRE_API(void,
 XRE_API(void,
         XRE_SetProcessType, (const char* aProcessTypeString))
 
-#if defined(MOZ_CRASHREPORTER)
 // Used in the "master" parent process hosting the crash server
 XRE_API(bool,
         XRE_TakeMinidumpForChild, (uint32_t aChildPid, nsIFile** aDump,
@@ -412,7 +411,6 @@ XRE_API(bool,
 // Used in child processes.
 XRE_API(bool,
         XRE_SetRemoteExceptionHandler, (const char* aPipe))
-#endif
 
 namespace mozilla {
 namespace gmp {
diff --git a/xpcom/system/moz.build b/xpcom/system/moz.build
index 2be77e7f0878..700ac2b0e109 100644
--- a/xpcom/system/moz.build
+++ b/xpcom/system/moz.build
@@ -6,6 +6,7 @@
 
 XPIDL_SOURCES += [
     'nsIBlocklistService.idl',
+    'nsICrashReporter.idl',
     'nsIDeviceSensors.idl',
     'nsIGConfService.idl',
     'nsIGeolocationProvider.idl',
@@ -17,9 +18,4 @@ XPIDL_SOURCES += [
     'nsIXULRuntime.idl',
 ]
 
-if CONFIG['MOZ_CRASHREPORTER']:
-    XPIDL_SOURCES += [
-        'nsICrashReporter.idl',
-    ]
-
 XPIDL_MODULE = 'xpcom_system'
diff --git a/xpcom/tests/gtest/TestDeadlockDetector.cpp b/xpcom/tests/gtest/TestDeadlockDetector.cpp
index f829817dfe03..8b9898b70e74 100644
--- a/xpcom/tests/gtest/TestDeadlockDetector.cpp
+++ b/xpcom/tests/gtest/TestDeadlockDetector.cpp
@@ -8,20 +8,17 @@
 
 #include "prthread.h"
 
-#include "nsTArray.h"
+#include "nsCOMPtr.h"
+#include "nsICrashReporter.h"
 #include "nsMemory.h"
+#include "nsServiceManagerUtils.h"
+#include "nsTArray.h"
 
 #include "mozilla/CondVar.h"
 #include "mozilla/RecursiveMutex.h"
 #include "mozilla/ReentrantMonitor.h"
 #include "mozilla/Mutex.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsCOMPtr.h"
-#include "nsICrashReporter.h"
-#include "nsServiceManagerUtils.h"
-#endif
-
 #include "gtest/gtest.h"
 
 using namespace mozilla;
@@ -74,13 +71,11 @@ private:
 
 void DisableCrashReporter()
 {
-#ifdef MOZ_CRASHREPORTER
     nsCOMPtr<nsICrashReporter> crashreporter =
         do_GetService("@mozilla.org/toolkit/crash-reporter;1");
     if (crashreporter) {
       crashreporter->SetEnabled(false);
     }
-#endif
 }
 
 //-----------------------------------------------------------------------------
diff --git a/xpcom/tests/gtest/TestPLDHash.cpp b/xpcom/tests/gtest/TestPLDHash.cpp
index 7291732faa5d..41ac2d5d04dc 100644
--- a/xpcom/tests/gtest/TestPLDHash.cpp
+++ b/xpcom/tests/gtest/TestPLDHash.cpp
@@ -6,6 +6,7 @@
 
 #include "PLDHashTable.h"
 #include "nsCOMPtr.h"
+#include "nsICrashReporter.h"
 #include "nsServiceManagerUtils.h"
 #include "gtest/gtest.h"
 
@@ -21,10 +22,6 @@
 extern unsigned int _gdb_sleep_duration;
 #endif
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsICrashReporter.h"
-#endif
-
 // We can test that certain operations cause expected aborts by forking
 // and then checking that the child aborted in the expected way (i.e. via
 // MOZ_CRASH). We skip this for the following configurations.
@@ -49,13 +46,11 @@ TestCrashyOperation(void (*aCrashyOperation)())
     // Disable the crashreporter -- writing a crash dump in the child will
     // prevent the parent from writing a subsequent dump. Crashes here are
     // expected, so we don't want their stacks to show up in the log anyway.
-#ifdef MOZ_CRASHREPORTER
     nsCOMPtr<nsICrashReporter> crashreporter =
       do_GetService("@mozilla.org/toolkit/crash-reporter;1");
     if (crashreporter) {
       crashreporter->SetEnabled(false);
     }
-#endif
 
     // Child: perform the crashy operation.
     fprintf(stderr, "TestCrashyOperation: The following crash is expected. Do not panic.\n");
diff --git a/xpcom/tests/gtest/TestSTLWrappers.cpp b/xpcom/tests/gtest/TestSTLWrappers.cpp
index c4ea9824c0c3..2aaa3466d0c1 100644
--- a/xpcom/tests/gtest/TestSTLWrappers.cpp
+++ b/xpcom/tests/gtest/TestSTLWrappers.cpp
@@ -10,11 +10,9 @@
 #  error "failed to wrap <vector>"
 #endif
 
-#ifdef MOZ_CRASHREPORTER
 #include "nsCOMPtr.h"
 #include "nsICrashReporter.h"
 #include "nsServiceManagerUtils.h"
-#endif
 
 // gcc errors out if we |try ... catch| with -fno-exceptions, but we
 // can still test on windows
@@ -41,13 +39,11 @@ void ShouldAbort()
     _gdb_sleep_duration = 0;
 #endif
 
-#ifdef MOZ_CRASHREPORTER
     nsCOMPtr<nsICrashReporter> crashreporter =
         do_GetService("@mozilla.org/toolkit/crash-reporter;1");
     if (crashreporter) {
       crashreporter->SetEnabled(false);
     }
-#endif
 
     std::vector<int> v;
     int rv = 1;
diff --git a/xpcom/threads/HangMonitor.cpp b/xpcom/threads/HangMonitor.cpp
index 851d1f707903..09a599dd56b0 100644
--- a/xpcom/threads/HangMonitor.cpp
+++ b/xpcom/threads/HangMonitor.cpp
@@ -14,6 +14,7 @@
 #include "mozilla/Telemetry.h"
 #include "mozilla/StaticPtr.h"
 #include "mozilla/UniquePtr.h"
+#include "nsExceptionHandler.h"
 #include "nsReadableUtils.h"
 #include "nsThreadUtils.h"
 #include "mozilla/StackWalk.h"
@@ -21,10 +22,6 @@
 #include "nsXULAppAPI.h"
 #include "GeckoProfiler.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsExceptionHandler.h"
-#endif
-
 #ifdef XP_WIN
 #include <windows.h>
 #endif
@@ -110,7 +107,6 @@ Crash()
   }
 #endif
 
-#ifdef MOZ_CRASHREPORTER
   // If you change this, you must also deal with the threadsafety of AnnotateCrashReport in
   // non-chrome processes!
   if (GeckoProcessType_Default == XRE_GetProcessType()) {
@@ -118,7 +114,6 @@ Crash()
                                        NS_LITERAL_CSTRING("1"));
     CrashReporter::SetMinidumpAnalysisAllThreads();
   }
-#endif
 
   MOZ_CRASH("HangMonitor triggered");
 }
diff --git a/xpcom/threads/nsThread.cpp b/xpcom/threads/nsThread.cpp
index aade5eda7af4..8eeb9daca843 100644
--- a/xpcom/threads/nsThread.cpp
+++ b/xpcom/threads/nsThread.cpp
@@ -38,16 +38,14 @@
 #include "mozilla/TimeStamp.h"
 #include "mozilla/Unused.h"
 #include "mozilla/dom/ScriptSettings.h"
+#include "nsICrashReporter.h"
 #include "nsThreadSyncDispatch.h"
+#include "nsServiceManagerUtils.h"
 #include "GeckoProfiler.h"
 #include "InputEventStatistics.h"
 #include "ThreadEventTarget.h"
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsServiceManagerUtils.h"
-#include "nsICrashReporter.h"
 #include "mozilla/dom/ContentChild.h"
-#endif
 
 #ifdef XP_LINUX
 #include <sys/time.h>
@@ -476,7 +474,6 @@ nsThread::ThreadFunc(void* aArg)
 
 //-----------------------------------------------------------------------------
 
-#ifdef MOZ_CRASHREPORTER
 // Tell the crash reporter to save a memory report if our heuristics determine
 // that an OOM failure is likely to occur soon.
 // Memory usage will not be checked more than every 30 seconds or saved more
@@ -541,7 +538,6 @@ nsThread::SaveMemoryReportNearOOM(ShouldSaveMemoryReport aShouldSave)
 
   return recentlySavedReport;
 }
-#endif
 
 #ifdef MOZ_CANARY
 int sCanaryOutputFD = -1;
@@ -1207,11 +1203,9 @@ nsThread::DoMainThreadSpecificProcessing(bool aReallyWait)
     }
   }
 
-#ifdef MOZ_CRASHREPORTER
   if (!ShuttingDown()) {
     SaveMemoryReportNearOOM(ShouldSaveMemoryReport::kMaybeReport);
   }
-#endif
 }
 
 NS_IMETHODIMP
diff --git a/xpcom/threads/nsThread.h b/xpcom/threads/nsThread.h
index 33ae13963ac7..00049a2c8e4f 100644
--- a/xpcom/threads/nsThread.h
+++ b/xpcom/threads/nsThread.h
@@ -87,7 +87,6 @@ public:
 
   void WaitForAllAsynchronousShutdowns();
 
-#ifdef MOZ_CRASHREPORTER
   enum class ShouldSaveMemoryReport
   {
     kMaybeReport,
@@ -95,7 +94,6 @@ public:
   };
 
   static bool SaveMemoryReportNearOOM(ShouldSaveMemoryReport aShouldSave);
-#endif
 
   static const uint32_t kRunnableNameBufSize = 1000;
   static mozilla::Array<char, kRunnableNameBufSize> sMainThreadRunnableName;
diff --git a/xpcom/threads/nsThreadUtils.cpp b/xpcom/threads/nsThreadUtils.cpp
index 309ab99f71e7..472fc0bed06f 100644
--- a/xpcom/threads/nsThreadUtils.cpp
+++ b/xpcom/threads/nsThreadUtils.cpp
@@ -10,10 +10,9 @@
 #include "mozilla/TimeStamp.h"
 #include "LeakRefPtr.h"
 #include "nsComponentManagerUtils.h"
+#include "nsExceptionHandler.h"
 #include "nsITimer.h"
 
-#include "nsComponentManagerUtils.h"
-
 #ifdef MOZILLA_INTERNAL_API
 # include "nsThreadManager.h"
 #else
@@ -28,10 +27,6 @@
 #include <sys/resource.h>
 #endif
 
-#ifdef MOZ_CRASHREPORTER
-#include "nsExceptionHandler.h"
-#endif
-
 using namespace mozilla;
 
 #ifndef XPCOM_GLUE_AVOID_NSPR
@@ -517,9 +512,7 @@ void
 NS_SetCurrentThreadName(const char* aName)
 {
   PR_SetCurrentThreadName(aName);
-#ifdef MOZ_CRASHREPORTER
   CrashReporter::SetCurrentThreadName(aName);
-#endif
 }
 
 #ifdef MOZILLA_INTERNAL_API