diff --git a/mozglue/build/moz.build b/mozglue/build/moz.build
index 6b0841884019..4d1e1d0e45eb 100644
--- a/mozglue/build/moz.build
+++ b/mozglue/build/moz.build
@@ -39,9 +39,10 @@ if CONFIG["OS_TARGET"] == "WINNT":
     if CONFIG["MOZ_MEMORY"]:
         DEFFILE = "mozglue.def"
     # We'll break the DLL blocklist if we immediately load user32.dll.
-    # For the same reason, we delayload winmm.dll and ole32.dll which
-    # statically link user32.dll.
+    # For the same reason, we delayload these other DLLs to avoid eager
+    # dependencies on user32.dll.
     DELAYLOAD_DLLS += [
+        "oleaut32.dll",
         "ole32.dll",
         "user32.dll",
         "winmm.dll",
diff --git a/mozglue/misc/moz.build b/mozglue/misc/moz.build
index 76ccc6f8023d..070e1f6f97ab 100644
--- a/mozglue/misc/moz.build
+++ b/mozglue/misc/moz.build
@@ -50,12 +50,6 @@ SOURCES += [
 OS_LIBS += CONFIG["REALTIME_LIBS"]
 
 if CONFIG["OS_ARCH"] == "WINNT":
-    DIRS += [
-        "interceptor",
-    ]
-    EXPORTS += [
-        "nsWindowsDllInterceptor.h",
-    ]
     EXPORTS.mozilla += [
         "DynamicallyLinkedFunctionPtr.h",
         "ImportDir.h",
diff --git a/mozglue/moz.build b/mozglue/moz.build
index d3813122c95b..75e14589ca57 100644
--- a/mozglue/moz.build
+++ b/mozglue/moz.build
@@ -13,9 +13,6 @@ if CONFIG["MOZ_LINKER"] or CONFIG["MOZ_WIDGET_TOOLKIT"] == "android":
 if CONFIG["MOZ_WIDGET_TOOLKIT"] == "android":
     DIRS += ["android"]
 
-if CONFIG["OS_TARGET"] == "WINNT":
-    DIRS += ["dllservices"]
-
 DIRS += [
     "baseprofiler",
     "build",
diff --git a/mozglue/tests/gtest/moz.build b/mozglue/tests/gtest/moz.build
index 7d0a63bec1d7..7026a53c1f0b 100644
--- a/mozglue/tests/gtest/moz.build
+++ b/mozglue/tests/gtest/moz.build
@@ -4,17 +4,9 @@
 
 if CONFIG["OS_ARCH"] == "WINNT":
     SOURCES += [
-        "TestDLLBlocklist.cpp",
         "TestNativeNtGTest.cpp",
     ]
 
-    TEST_DIRS += [
-        "TestDllBlocklist_AllowByVersion",
-        "TestDllBlocklist_MatchByName",
-        "TestDllBlocklist_MatchByVersion",
-        "TestDllBlocklist_NoOpEntryPoint",
-    ]
-
 SOURCES += [
     "TestStackWalk.cpp",
 ]
diff --git a/mozglue/tests/moz.build b/mozglue/tests/moz.build
index aa88eb5c8e93..15aa2581f271 100644
--- a/mozglue/tests/moz.build
+++ b/mozglue/tests/moz.build
@@ -36,9 +36,6 @@ if CONFIG["OS_ARCH"] == "WINNT":
         ],
         linkage=None,
     )
-    TEST_DIRS += [
-        "interceptor",
-    ]
     OS_LIBS += [
         "ntdll",
         "version",
diff --git a/toolkit/xre/ModuleEvaluator.cpp b/toolkit/xre/dllservices/ModuleEvaluator.cpp
similarity index 100%
rename from toolkit/xre/ModuleEvaluator.cpp
rename to toolkit/xre/dllservices/ModuleEvaluator.cpp
index ccc4fba6863c..58814e34a55e 100644
--- a/toolkit/xre/ModuleEvaluator.cpp
+++ b/toolkit/xre/dllservices/ModuleEvaluator.cpp
@@ -22,6 +22,8 @@
 #include "nsWindowsHelpers.h"
 #include "nsXULAppAPI.h"
 
+namespace mozilla {
+
 // Fills a Vector with keyboard layout DLLs found in the registry.
 // These are leaf names only, not full paths. Here we will convert them to
 // lowercase before returning, to facilitate case-insensitive searches.
@@ -61,8 +63,6 @@ static Vector<nsString> GetKeyboardLayoutDlls() {
   return result;
 }
 
-namespace mozilla {
-
 /* static */
 bool ModuleEvaluator::ResolveKnownFolder(REFKNOWNFOLDERID aFolderId,
                                          nsIFile** aOutFile) {
diff --git a/toolkit/xre/ModuleEvaluator.h b/toolkit/xre/dllservices/ModuleEvaluator.h
similarity index 98%
rename from toolkit/xre/ModuleEvaluator.h
rename to toolkit/xre/dllservices/ModuleEvaluator.h
index e1f623cb9e33..565b5d4da4ae 100644
--- a/toolkit/xre/ModuleEvaluator.h
+++ b/toolkit/xre/dllservices/ModuleEvaluator.h
@@ -16,6 +16,8 @@
 #include "nsIFile.h"
 #include "nsString.h"
 
+#include <shtypes.h>
+
 namespace mozilla {
 
 class ModuleRecord;
diff --git a/toolkit/xre/ModuleVersionInfo.cpp b/toolkit/xre/dllservices/ModuleVersionInfo.cpp
similarity index 100%
rename from toolkit/xre/ModuleVersionInfo.cpp
rename to toolkit/xre/dllservices/ModuleVersionInfo.cpp
diff --git a/toolkit/xre/ModuleVersionInfo.h b/toolkit/xre/dllservices/ModuleVersionInfo.h
similarity index 100%
rename from toolkit/xre/ModuleVersionInfo.h
rename to toolkit/xre/dllservices/ModuleVersionInfo.h
diff --git a/toolkit/xre/UntrustedModulesData.cpp b/toolkit/xre/dllservices/UntrustedModulesData.cpp
similarity index 100%
rename from toolkit/xre/UntrustedModulesData.cpp
rename to toolkit/xre/dllservices/UntrustedModulesData.cpp
index d2f62a607a01..314e36ad89f7 100644
--- a/toolkit/xre/UntrustedModulesData.cpp
+++ b/toolkit/xre/dllservices/UntrustedModulesData.cpp
@@ -62,6 +62,8 @@ static LONGLONG TimeUnitsToQPC(const LONGLONG aTimeStamp,
   return result;
 }
 
+namespace mozilla {
+
 static Maybe<double> QPCLoadDurationToMilliseconds(
     const ModuleLoadInfo& aNtInfo) {
   if (aNtInfo.IsBare()) {
@@ -71,8 +73,6 @@ static Maybe<double> QPCLoadDurationToMilliseconds(
   return Some(QPCToMilliseconds<double>(aNtInfo.mLoadTimeInfo.QuadPart));
 }
 
-namespace mozilla {
-
 ModuleRecord::ModuleRecord() : mTrustFlags(ModuleTrustFlags::None) {}
 
 ModuleRecord::ModuleRecord(const nsAString& aResolvedNtPath)
diff --git a/toolkit/xre/UntrustedModulesData.h b/toolkit/xre/dllservices/UntrustedModulesData.h
similarity index 100%
rename from toolkit/xre/UntrustedModulesData.h
rename to toolkit/xre/dllservices/UntrustedModulesData.h
diff --git a/toolkit/xre/UntrustedModulesProcessor.cpp b/toolkit/xre/dllservices/UntrustedModulesProcessor.cpp
similarity index 99%
rename from toolkit/xre/UntrustedModulesProcessor.cpp
rename to toolkit/xre/dllservices/UntrustedModulesProcessor.cpp
index 3e02134f931f..084aa6680f2b 100644
--- a/toolkit/xre/UntrustedModulesProcessor.cpp
+++ b/toolkit/xre/dllservices/UntrustedModulesProcessor.cpp
@@ -688,12 +688,12 @@ UntrustedModulesProcessor::SendGetModulesTrust(ModulePaths&& aModules,
 
   switch (XRE_GetProcessType()) {
     case GeckoProcessType_Content: {
-      return ::SendGetModulesTrust(dom::ContentChild::GetSingleton(),
-                                   std::move(aModules), runNormal);
+      return ::mozilla::SendGetModulesTrust(dom::ContentChild::GetSingleton(),
+                                            std::move(aModules), runNormal);
     }
     case GeckoProcessType_RDD: {
-      return ::SendGetModulesTrust(RDDParent::GetSingleton(),
-                                   std::move(aModules), runNormal);
+      return ::mozilla::SendGetModulesTrust(RDDParent::GetSingleton(),
+                                            std::move(aModules), runNormal);
     }
     default: {
       MOZ_ASSERT_UNREACHABLE("Unsupported process type");
diff --git a/toolkit/xre/UntrustedModulesProcessor.h b/toolkit/xre/dllservices/UntrustedModulesProcessor.h
similarity index 100%
rename from toolkit/xre/UntrustedModulesProcessor.h
rename to toolkit/xre/dllservices/UntrustedModulesProcessor.h
diff --git a/toolkit/xre/WinDllServices.cpp b/toolkit/xre/dllservices/WinDllServices.cpp
similarity index 100%
rename from toolkit/xre/WinDllServices.cpp
rename to toolkit/xre/dllservices/WinDllServices.cpp
diff --git a/toolkit/xre/WinDllServices.h b/toolkit/xre/dllservices/WinDllServices.h
similarity index 100%
rename from toolkit/xre/WinDllServices.h
rename to toolkit/xre/dllservices/WinDllServices.h
diff --git a/toolkit/xre/dllservices/moz.build b/toolkit/xre/dllservices/moz.build
new file mode 100644
index 000000000000..1e666f05f233
--- /dev/null
+++ b/toolkit/xre/dllservices/moz.build
@@ -0,0 +1,35 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "DLL Services")
+
+FINAL_LIBRARY = "xul"
+
+EXPORTS.mozilla += [
+    "ModuleVersionInfo.h",
+    "UntrustedModulesData.h",
+    "UntrustedModulesProcessor.h",
+    "WinDllServices.h",
+]
+
+DIRS += [
+    "mozglue",
+]
+
+UNIFIED_SOURCES += [
+    "ModuleEvaluator.cpp",
+    "ModuleVersionInfo.cpp",
+    "UntrustedModulesData.cpp",
+    "UntrustedModulesProcessor.cpp",
+    "WinDllServices.cpp",
+]
+
+TEST_DIRS += [
+    "tests",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
diff --git a/mozglue/dllservices/Authenticode.cpp b/toolkit/xre/dllservices/mozglue/Authenticode.cpp
similarity index 100%
rename from mozglue/dllservices/Authenticode.cpp
rename to toolkit/xre/dllservices/mozglue/Authenticode.cpp
diff --git a/mozglue/dllservices/Authenticode.h b/toolkit/xre/dllservices/mozglue/Authenticode.h
similarity index 100%
rename from mozglue/dllservices/Authenticode.h
rename to toolkit/xre/dllservices/mozglue/Authenticode.h
diff --git a/mozglue/dllservices/CacheNtDllThunk.cpp b/toolkit/xre/dllservices/mozglue/CacheNtDllThunk.cpp
similarity index 100%
rename from mozglue/dllservices/CacheNtDllThunk.cpp
rename to toolkit/xre/dllservices/mozglue/CacheNtDllThunk.cpp
diff --git a/mozglue/dllservices/CacheNtDllThunk.h b/toolkit/xre/dllservices/mozglue/CacheNtDllThunk.h
similarity index 100%
rename from mozglue/dllservices/CacheNtDllThunk.h
rename to toolkit/xre/dllservices/mozglue/CacheNtDllThunk.h
diff --git a/mozglue/dllservices/LoaderAPIInterfaces.h b/toolkit/xre/dllservices/mozglue/LoaderAPIInterfaces.h
similarity index 100%
rename from mozglue/dllservices/LoaderAPIInterfaces.h
rename to toolkit/xre/dllservices/mozglue/LoaderAPIInterfaces.h
diff --git a/mozglue/dllservices/LoaderObserver.cpp b/toolkit/xre/dllservices/mozglue/LoaderObserver.cpp
similarity index 100%
rename from mozglue/dllservices/LoaderObserver.cpp
rename to toolkit/xre/dllservices/mozglue/LoaderObserver.cpp
diff --git a/mozglue/dllservices/LoaderObserver.h b/toolkit/xre/dllservices/mozglue/LoaderObserver.h
similarity index 100%
rename from mozglue/dllservices/LoaderObserver.h
rename to toolkit/xre/dllservices/mozglue/LoaderObserver.h
diff --git a/mozglue/dllservices/ModuleLoadFrame.cpp b/toolkit/xre/dllservices/mozglue/ModuleLoadFrame.cpp
similarity index 100%
rename from mozglue/dllservices/ModuleLoadFrame.cpp
rename to toolkit/xre/dllservices/mozglue/ModuleLoadFrame.cpp
diff --git a/mozglue/dllservices/ModuleLoadFrame.h b/toolkit/xre/dllservices/mozglue/ModuleLoadFrame.h
similarity index 100%
rename from mozglue/dllservices/ModuleLoadFrame.h
rename to toolkit/xre/dllservices/mozglue/ModuleLoadFrame.h
diff --git a/mozglue/dllservices/ModuleLoadInfo.h b/toolkit/xre/dllservices/mozglue/ModuleLoadInfo.h
similarity index 100%
rename from mozglue/dllservices/ModuleLoadInfo.h
rename to toolkit/xre/dllservices/mozglue/ModuleLoadInfo.h
diff --git a/mozglue/dllservices/NtLoaderAPI.h b/toolkit/xre/dllservices/mozglue/NtLoaderAPI.h
similarity index 100%
rename from mozglue/dllservices/NtLoaderAPI.h
rename to toolkit/xre/dllservices/mozglue/NtLoaderAPI.h
diff --git a/mozglue/dllservices/WindowsDllBlocklist.cpp b/toolkit/xre/dllservices/mozglue/WindowsDllBlocklist.cpp
similarity index 100%
rename from mozglue/dllservices/WindowsDllBlocklist.cpp
rename to toolkit/xre/dllservices/mozglue/WindowsDllBlocklist.cpp
diff --git a/mozglue/dllservices/WindowsDllBlocklist.h b/toolkit/xre/dllservices/mozglue/WindowsDllBlocklist.h
similarity index 100%
rename from mozglue/dllservices/WindowsDllBlocklist.h
rename to toolkit/xre/dllservices/mozglue/WindowsDllBlocklist.h
diff --git a/mozglue/dllservices/WindowsDllBlocklistCommon.h b/toolkit/xre/dllservices/mozglue/WindowsDllBlocklistCommon.h
similarity index 100%
rename from mozglue/dllservices/WindowsDllBlocklistCommon.h
rename to toolkit/xre/dllservices/mozglue/WindowsDllBlocklistCommon.h
diff --git a/mozglue/dllservices/WindowsDllBlocklistDefs.in b/toolkit/xre/dllservices/mozglue/WindowsDllBlocklistDefs.in
similarity index 100%
rename from mozglue/dllservices/WindowsDllBlocklistDefs.in
rename to toolkit/xre/dllservices/mozglue/WindowsDllBlocklistDefs.in
diff --git a/mozglue/dllservices/WindowsDllServices.h b/toolkit/xre/dllservices/mozglue/WindowsDllServices.h
similarity index 100%
rename from mozglue/dllservices/WindowsDllServices.h
rename to toolkit/xre/dllservices/mozglue/WindowsDllServices.h
diff --git a/mozglue/dllservices/WindowsFallbackLoaderAPI.cpp b/toolkit/xre/dllservices/mozglue/WindowsFallbackLoaderAPI.cpp
similarity index 100%
rename from mozglue/dllservices/WindowsFallbackLoaderAPI.cpp
rename to toolkit/xre/dllservices/mozglue/WindowsFallbackLoaderAPI.cpp
diff --git a/mozglue/dllservices/WindowsFallbackLoaderAPI.h b/toolkit/xre/dllservices/mozglue/WindowsFallbackLoaderAPI.h
similarity index 100%
rename from mozglue/dllservices/WindowsFallbackLoaderAPI.h
rename to toolkit/xre/dllservices/mozglue/WindowsFallbackLoaderAPI.h
diff --git a/mozglue/dllservices/gen_dll_blocklist_defs.py b/toolkit/xre/dllservices/mozglue/gen_dll_blocklist_defs.py
similarity index 100%
rename from mozglue/dllservices/gen_dll_blocklist_defs.py
rename to toolkit/xre/dllservices/mozglue/gen_dll_blocklist_defs.py
diff --git a/mozglue/misc/interceptor/Arm64.cpp b/toolkit/xre/dllservices/mozglue/interceptor/Arm64.cpp
similarity index 100%
rename from mozglue/misc/interceptor/Arm64.cpp
rename to toolkit/xre/dllservices/mozglue/interceptor/Arm64.cpp
diff --git a/mozglue/misc/interceptor/Arm64.h b/toolkit/xre/dllservices/mozglue/interceptor/Arm64.h
similarity index 100%
rename from mozglue/misc/interceptor/Arm64.h
rename to toolkit/xre/dllservices/mozglue/interceptor/Arm64.h
diff --git a/mozglue/misc/interceptor/MMPolicies.h b/toolkit/xre/dllservices/mozglue/interceptor/MMPolicies.h
similarity index 100%
rename from mozglue/misc/interceptor/MMPolicies.h
rename to toolkit/xre/dllservices/mozglue/interceptor/MMPolicies.h
diff --git a/mozglue/misc/interceptor/PatcherBase.h b/toolkit/xre/dllservices/mozglue/interceptor/PatcherBase.h
similarity index 100%
rename from mozglue/misc/interceptor/PatcherBase.h
rename to toolkit/xre/dllservices/mozglue/interceptor/PatcherBase.h
diff --git a/mozglue/misc/interceptor/PatcherDetour.h b/toolkit/xre/dllservices/mozglue/interceptor/PatcherDetour.h
similarity index 100%
rename from mozglue/misc/interceptor/PatcherDetour.h
rename to toolkit/xre/dllservices/mozglue/interceptor/PatcherDetour.h
diff --git a/mozglue/misc/interceptor/PatcherNopSpace.h b/toolkit/xre/dllservices/mozglue/interceptor/PatcherNopSpace.h
similarity index 100%
rename from mozglue/misc/interceptor/PatcherNopSpace.h
rename to toolkit/xre/dllservices/mozglue/interceptor/PatcherNopSpace.h
diff --git a/mozglue/misc/interceptor/RangeMap.h b/toolkit/xre/dllservices/mozglue/interceptor/RangeMap.h
similarity index 100%
rename from mozglue/misc/interceptor/RangeMap.h
rename to toolkit/xre/dllservices/mozglue/interceptor/RangeMap.h
diff --git a/mozglue/misc/interceptor/TargetFunction.h b/toolkit/xre/dllservices/mozglue/interceptor/TargetFunction.h
similarity index 100%
rename from mozglue/misc/interceptor/TargetFunction.h
rename to toolkit/xre/dllservices/mozglue/interceptor/TargetFunction.h
diff --git a/mozglue/misc/interceptor/Trampoline.h b/toolkit/xre/dllservices/mozglue/interceptor/Trampoline.h
similarity index 100%
rename from mozglue/misc/interceptor/Trampoline.h
rename to toolkit/xre/dllservices/mozglue/interceptor/Trampoline.h
diff --git a/mozglue/misc/interceptor/VMSharingPolicies.h b/toolkit/xre/dllservices/mozglue/interceptor/VMSharingPolicies.h
similarity index 100%
rename from mozglue/misc/interceptor/VMSharingPolicies.h
rename to toolkit/xre/dllservices/mozglue/interceptor/VMSharingPolicies.h
diff --git a/mozglue/misc/interceptor/moz.build b/toolkit/xre/dllservices/mozglue/interceptor/moz.build
similarity index 100%
rename from mozglue/misc/interceptor/moz.build
rename to toolkit/xre/dllservices/mozglue/interceptor/moz.build
diff --git a/mozglue/dllservices/moz.build b/toolkit/xre/dllservices/mozglue/moz.build
similarity index 95%
rename from mozglue/dllservices/moz.build
rename to toolkit/xre/dllservices/mozglue/moz.build
index 3bb35a0be9c5..b0dc7ec07848 100644
--- a/mozglue/dllservices/moz.build
+++ b/toolkit/xre/dllservices/mozglue/moz.build
@@ -5,7 +5,6 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 if CONFIG["MOZ_WIDGET_TOOLKIT"]:
-
     SOURCES += [
         # This file contains a |using namespace mozilla;| statement
         "WindowsDllBlocklist.cpp",
@@ -35,6 +34,10 @@ DELAYLOAD_DLLS += [
     "wintrust.dll",
 ]
 
+EXPORTS += [
+    "nsWindowsDllInterceptor.h",
+]
+
 EXPORTS.mozilla += [
     "Authenticode.h",
     "CacheNtDllThunk.h",
@@ -61,6 +64,11 @@ GeneratedFile(
     entry_point="gen_blocklists",
     inputs=["WindowsDllBlocklistDefs.in"]
 )
+
 EXPORTS.mozilla += ["!" + hdr for hdr in blocklist_files]
 
+DIRS += [
+    "interceptor",
+]
+
 FINAL_LIBRARY = "mozglue"
diff --git a/mozglue/misc/nsWindowsDllInterceptor.h b/toolkit/xre/dllservices/mozglue/nsWindowsDllInterceptor.h
similarity index 100%
rename from mozglue/misc/nsWindowsDllInterceptor.h
rename to toolkit/xre/dllservices/mozglue/nsWindowsDllInterceptor.h
diff --git a/mozglue/tests/interceptor/AssemblyPayloads.h b/toolkit/xre/dllservices/tests/AssemblyPayloads.h
similarity index 100%
rename from mozglue/tests/interceptor/AssemblyPayloads.h
rename to toolkit/xre/dllservices/tests/AssemblyPayloads.h
diff --git a/mozglue/tests/interceptor/TestDllInterceptor.cpp b/toolkit/xre/dllservices/tests/TestDllInterceptor.cpp
similarity index 100%
rename from mozglue/tests/interceptor/TestDllInterceptor.cpp
rename to toolkit/xre/dllservices/tests/TestDllInterceptor.cpp
diff --git a/mozglue/tests/interceptor/TestDllInterceptor.exe.manifest b/toolkit/xre/dllservices/tests/TestDllInterceptor.exe.manifest
similarity index 100%
rename from mozglue/tests/interceptor/TestDllInterceptor.exe.manifest
rename to toolkit/xre/dllservices/tests/TestDllInterceptor.exe.manifest
diff --git a/mozglue/tests/interceptor/TestDllInterceptorCrossProcess.cpp b/toolkit/xre/dllservices/tests/TestDllInterceptorCrossProcess.cpp
similarity index 100%
rename from mozglue/tests/interceptor/TestDllInterceptorCrossProcess.cpp
rename to toolkit/xre/dllservices/tests/TestDllInterceptorCrossProcess.cpp
diff --git a/mozglue/tests/interceptor/TestIATPatcher.cpp b/toolkit/xre/dllservices/tests/TestIATPatcher.cpp
similarity index 100%
rename from mozglue/tests/interceptor/TestIATPatcher.cpp
rename to toolkit/xre/dllservices/tests/TestIATPatcher.cpp
diff --git a/mozglue/tests/interceptor/TestMMPolicy.cpp b/toolkit/xre/dllservices/tests/TestMMPolicy.cpp
similarity index 100%
rename from mozglue/tests/interceptor/TestMMPolicy.cpp
rename to toolkit/xre/dllservices/tests/TestMMPolicy.cpp
diff --git a/mozglue/tests/gtest/TestDLLBlocklist.cpp b/toolkit/xre/dllservices/tests/gtest/TestDLLBlocklist.cpp
similarity index 100%
rename from mozglue/tests/gtest/TestDLLBlocklist.cpp
rename to toolkit/xre/dllservices/tests/gtest/TestDLLBlocklist.cpp
diff --git a/mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.cpp b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.cpp
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.cpp
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.cpp
diff --git a/mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.rc b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.rc
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.rc
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/TestDllBlocklist_AllowByVersion.rc
diff --git a/mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/moz.build b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/moz.build
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_AllowByVersion/moz.build
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_AllowByVersion/moz.build
diff --git a/mozglue/tests/gtest/TestDllBlocklist_MatchByName/TestDllBlocklist_MatchByName.cpp b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByName/TestDllBlocklist_MatchByName.cpp
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_MatchByName/TestDllBlocklist_MatchByName.cpp
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByName/TestDllBlocklist_MatchByName.cpp
diff --git a/mozglue/tests/gtest/TestDllBlocklist_MatchByName/moz.build b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByName/moz.build
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_MatchByName/moz.build
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByName/moz.build
diff --git a/mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.cpp b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.cpp
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.cpp
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.cpp
diff --git a/mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.rc b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.rc
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.rc
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/TestDllBlocklist_MatchByVersion.rc
diff --git a/mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/moz.build b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/moz.build
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_MatchByVersion/moz.build
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_MatchByVersion/moz.build
diff --git a/mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.cpp b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.cpp
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.cpp
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.cpp
diff --git a/mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.rc b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.rc
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.rc
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/TestDllBlocklist_NoOpEntryPoint.rc
diff --git a/mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/moz.build b/toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/moz.build
similarity index 100%
rename from mozglue/tests/gtest/TestDllBlocklist_NoOpEntryPoint/moz.build
rename to toolkit/xre/dllservices/tests/gtest/TestDllBlocklist_NoOpEntryPoint/moz.build
diff --git a/toolkit/xre/dllservices/tests/gtest/moz.build b/toolkit/xre/dllservices/tests/gtest/moz.build
new file mode 100644
index 000000000000..61f46bfd34f0
--- /dev/null
+++ b/toolkit/xre/dllservices/tests/gtest/moz.build
@@ -0,0 +1,16 @@
+# 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/.
+
+SOURCES += [
+    "TestDLLBlocklist.cpp",
+]
+
+TEST_DIRS += [
+    "TestDllBlocklist_AllowByVersion",
+    "TestDllBlocklist_MatchByName",
+    "TestDllBlocklist_MatchByVersion",
+    "TestDllBlocklist_NoOpEntryPoint",
+]
+
+FINAL_LIBRARY = "xul-gtest"
diff --git a/mozglue/tests/interceptor/moz.build b/toolkit/xre/dllservices/tests/moz.build
similarity index 84%
rename from mozglue/tests/interceptor/moz.build
rename to toolkit/xre/dllservices/tests/moz.build
index c179125cff71..f79a2667940b 100644
--- a/mozglue/tests/interceptor/moz.build
+++ b/toolkit/xre/dllservices/tests/moz.build
@@ -13,7 +13,7 @@ GeckoCppUnitTests(
     linkage=None,
 )
 
-if CONFIG["OS_TARGET"] == "WINNT" and CONFIG["CPU_ARCH"] in ("x86", "x86_64"):
+if CONFIG["CPU_ARCH"] in ("x86", "x86_64"):
     # Cross-process interceptors not yet supported on aarch64
     GeckoCppUnitTests(
         [
@@ -33,8 +33,12 @@ DELAYLOAD_DLLS += [
     "shlwapi.dll",
 ]
 
-if CONFIG["OS_TARGET"] == "WINNT" and CONFIG["CC_TYPE"] in ("gcc", "clang"):
+if CONFIG["CC_TYPE"] in ("gcc", "clang"):
     # This allows us to use wmain as the entry point on mingw
     LDFLAGS += [
         "-municode",
     ]
+
+TEST_DIRS += [
+    "gtest",
+]
diff --git a/toolkit/xre/moz.build b/toolkit/xre/moz.build
index 7676bc7c8220..513142b179ac 100644
--- a/toolkit/xre/moz.build
+++ b/toolkit/xre/moz.build
@@ -40,7 +40,6 @@ EXPORTS.mozilla += [
     "CmdLineAndEnvUtils.h",
     "MultiInstanceLock.h",
     "SafeMode.h",
-    "UntrustedModulesData.h",
 ]
 
 if CONFIG["MOZ_INSTRUMENT_EVENT_LOOP"]:
@@ -50,22 +49,14 @@ if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
     EXPORTS.mozilla += [
         "AssembleCmdLine.h",
         "DllPrefetchExperimentRegistryInfo.h",
-        "ModuleVersionInfo.h",
         "PolicyChecks.h",
-        "UntrustedModulesProcessor.h",
-        "WinDllServices.h",
         "WinTokenUtils.h",
     ]
     UNIFIED_SOURCES += [
         "/toolkit/mozapps/update/common/pathhash.cpp",
         "/toolkit/mozapps/update/common/updateutils_win.cpp",
         "DllPrefetchExperimentRegistryInfo.cpp",
-        "ModuleEvaluator.cpp",
-        "ModuleVersionInfo.cpp",
         "nsNativeAppSupportWin.cpp",
-        "UntrustedModulesData.cpp",
-        "UntrustedModulesProcessor.cpp",
-        "WinDllServices.cpp",
         "WinTokenUtils.cpp",
     ]
     DEFINES["PROXY_PRINTING"] = 1
@@ -79,6 +70,9 @@ if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
         UNIFIED_SOURCES += [
             "LauncherRegistryInfo.cpp",
         ]
+    DIRS += [
+        "dllservices",
+    ]
 elif CONFIG["MOZ_WIDGET_TOOLKIT"] == "cocoa":
     EXPORTS.mozilla += [
         "MacRunFromDmgUtils.h",