diff --git a/netwerk/build/components.conf b/netwerk/build/components.conf
index 57b6ca3698ed..d5b651a54644 100644
--- a/netwerk/build/components.conf
+++ b/netwerk/build/components.conf
@@ -11,6 +11,22 @@ Headers = [
 InitFunc = 'nsNetStartup'
 UnloadFunc = 'nsNetShutdown'
 
+Categories = {
+    '@mozilla.org/streamconv;1': {
+        '?from=application/http-index-format&to=text/html': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=multipart/x-mixed-replace&to=*/*': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=multipart/mixed&to=*/*': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=multipart/byteranges&to=*/*': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=application/x-unknown-content-type&to=*/*': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=gzip&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=x-gzip&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=br&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=compress&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=x-compress&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+        '?from=deflate&to=uncompressed': ('', ProcessSelector.ALLOW_IN_SOCKET_PROCESS),
+    },
+}
+
 Classes = [
     {
         'cid': '{3014dde6-aa1c-41db-87d0-48764a3710f6}',
@@ -69,6 +85,7 @@ Classes = [
         'cid': '{a2027ec6-ba0d-4c72-805d-148233f5f33c}',
         'contract_ids': ['@mozilla.org/network/binary-detector;1'],
         'legacy_constructor': 'CreateNewBinaryDetectorFactory',
+        'categories': {'net-content-sniffers': 'Binary Detector'}
     },
     {
         'cid': '{9226888e-da08-11d3-8cda-0060b0fc14a3}',
diff --git a/netwerk/build/nsNetModule.cpp b/netwerk/build/nsNetModule.cpp
index 13a872a59700..72cd6c74cc49 100644
--- a/netwerk/build/nsNetModule.cpp
+++ b/netwerk/build/nsNetModule.cpp
@@ -119,33 +119,6 @@ nsresult MOZ_NewTXTToHTMLConv(mozTXTToHTMLConv** result);
 nsresult NS_NewHTTPCompressConv(mozilla::net::nsHTTPCompressConv** result);
 nsresult NS_NewStreamConv(nsStreamConverterService** aStreamConv);
 
-#define INDEX_TO_HTML "?from=application/http-index-format&to=text/html"
-#define MULTI_MIXED_X "?from=multipart/x-mixed-replace&to=*/*"
-#define MULTI_MIXED "?from=multipart/mixed&to=*/*"
-#define MULTI_BYTERANGES "?from=multipart/byteranges&to=*/*"
-#define UNKNOWN_CONTENT "?from=" UNKNOWN_CONTENT_TYPE "&to=*/*"
-#define GZIP_TO_UNCOMPRESSED "?from=gzip&to=uncompressed"
-#define XGZIP_TO_UNCOMPRESSED "?from=x-gzip&to=uncompressed"
-#define BROTLI_TO_UNCOMPRESSED "?from=br&to=uncompressed"
-#define COMPRESS_TO_UNCOMPRESSED "?from=compress&to=uncompressed"
-#define XCOMPRESS_TO_UNCOMPRESSED "?from=x-compress&to=uncompressed"
-#define DEFLATE_TO_UNCOMPRESSED "?from=deflate&to=uncompressed"
-
-static const mozilla::Module::CategoryEntry kNeckoCategories[] = {
-    {NS_ISTREAMCONVERTER_KEY, INDEX_TO_HTML, ""},
-    {NS_ISTREAMCONVERTER_KEY, MULTI_MIXED_X, ""},
-    {NS_ISTREAMCONVERTER_KEY, MULTI_MIXED, ""},
-    {NS_ISTREAMCONVERTER_KEY, MULTI_BYTERANGES, ""},
-    {NS_ISTREAMCONVERTER_KEY, UNKNOWN_CONTENT, ""},
-    {NS_ISTREAMCONVERTER_KEY, GZIP_TO_UNCOMPRESSED, ""},
-    {NS_ISTREAMCONVERTER_KEY, XGZIP_TO_UNCOMPRESSED, ""},
-    {NS_ISTREAMCONVERTER_KEY, BROTLI_TO_UNCOMPRESSED, ""},
-    {NS_ISTREAMCONVERTER_KEY, COMPRESS_TO_UNCOMPRESSED, ""},
-    {NS_ISTREAMCONVERTER_KEY, XCOMPRESS_TO_UNCOMPRESSED, ""},
-    {NS_ISTREAMCONVERTER_KEY, DEFLATE_TO_UNCOMPRESSED, ""},
-    NS_BINARYDETECTOR_CATEGORYENTRY,
-    {nullptr}};
-
 nsresult CreateNewStreamConvServiceFactory(REFNSIID aIID, void** aResult) {
   if (!aResult) {
     return NS_ERROR_INVALID_POINTER;
@@ -279,13 +252,3 @@ void nsNetShutdown() {
   delete gNetAndORBSniffers;
   gNetAndORBSniffers = nullptr;
 }
-
-extern const mozilla::Module kNeckoModule = {
-    mozilla::Module::kVersion,
-    nullptr,
-    nullptr,
-    kNeckoCategories,
-    nullptr,
-    nullptr,
-    nullptr,
-    mozilla::Module::ALLOW_IN_SOCKET_PROCESS};
diff --git a/netwerk/streamconv/converters/nsUnknownDecoder.h b/netwerk/streamconv/converters/nsUnknownDecoder.h
index d21304337fc8..0df9df93ad37 100644
--- a/netwerk/streamconv/converters/nsUnknownDecoder.h
+++ b/netwerk/streamconv/converters/nsUnknownDecoder.h
@@ -149,10 +149,4 @@ class nsBinaryDetector : public nsUnknownDecoder {
   virtual void DetermineContentType(nsIRequest* aRequest) override;
 };
 
-#define NS_BINARYDETECTOR_CATEGORYENTRY             \
-  {                                                 \
-    NS_CONTENT_SNIFFER_CATEGORY, "Binary Detector", \
-        NS_BINARYDETECTOR_CONTRACTID                \
-  }
-
 #endif /* nsUnknownDecoder_h__ */
diff --git a/xpcom/components/nsComponentManager.cpp b/xpcom/components/nsComponentManager.cpp
index abfd54d4dde4..b76c62d0149e 100644
--- a/xpcom/components/nsComponentManager.cpp
+++ b/xpcom/components/nsComponentManager.cpp
@@ -271,7 +271,6 @@ nsComponentManagerImpl::nsComponentManagerImpl()
       mLock("nsComponentManagerImpl.mLock"),
       mStatus(NOT_INITIALIZED) {}
 
-extern const mozilla::Module kNeckoModule;
 extern const mozilla::Module kPowerManagerModule;
 extern const mozilla::Module kContentProcessWidgetModule;
 #if defined(MOZ_WIDGET_COCOA) || defined(MOZ_WIDGET_UIKIT)
@@ -361,7 +360,6 @@ nsresult nsComponentManagerImpl::Init() {
 
   nsCategoryManager::GetSingleton()->SuppressNotifications(true);
 
-  RegisterModule(&kNeckoModule);
   RegisterModule(&kPowerManagerModule);
   RegisterModule(&kContentProcessWidgetModule);
 #if defined(MOZ_WIDGET_COCOA) || defined(MOZ_WIDGET_UIKIT)