diff --git a/dom/script/ScriptLoader.cpp b/dom/script/ScriptLoader.cpp
index a151d9b05f26..ebbf13c711da 100644
--- a/dom/script/ScriptLoader.cpp
+++ b/dom/script/ScriptLoader.cpp
@@ -172,7 +172,7 @@ NS_IMPL_CYCLE_COLLECTION(ScriptLoader, mNonAsyncExternalScriptInsertedRequests,
                          mXSLTRequests, mParserBlockingRequest,
                          mBytecodeEncodingQueue, mPreloads,
                          mPendingChildLoaders, mModuleLoader,
-                         mWebExtModuleLoaders)
+                         mWebExtModuleLoaders, mShadowRealmModuleLoaders)
 
 NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptLoader)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptLoader)
@@ -279,6 +279,13 @@ void ScriptLoader::RegisterContentScriptModuleLoader(ModuleLoader* aLoader) {
   mWebExtModuleLoaders.AppendElement(aLoader);
 }
 
+void ScriptLoader::RegisterShadowRealmModuleLoader(ModuleLoader* aLoader) {
+  MOZ_ASSERT(aLoader);
+  MOZ_ASSERT(aLoader->GetScriptLoader() == this);
+
+  mShadowRealmModuleLoaders.AppendElement(aLoader);
+}
+
 // Collect telemtry data about the cache information, and the kind of source
 // which are being loaded, and where it is being loaded from.
 static void CollectScriptTelemetry(ScriptLoadRequest* aRequest) {
@@ -2684,6 +2691,12 @@ bool ScriptLoader::HasPendingDynamicImports() const {
     }
   }
 
+  for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
+    if (loader->HasPendingDynamicImports()) {
+      return true;
+    }
+  }
+
   return false;
 }
 
@@ -3522,6 +3535,10 @@ void ScriptLoader::ParsingComplete(bool aTerminated) {
     loader->CancelAndClearDynamicImports();
   }
 
+  for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
+    loader->CancelAndClearDynamicImports();
+  }
+
   if (mParserBlockingRequest) {
     mParserBlockingRequest->Cancel();
     mParserBlockingRequest = nullptr;
diff --git a/dom/script/ScriptLoader.h b/dom/script/ScriptLoader.h
index 6205c0ed78aa..561c3e04ffe6 100644
--- a/dom/script/ScriptLoader.h
+++ b/dom/script/ScriptLoader.h
@@ -210,6 +210,7 @@ class ScriptLoader final : public JS::loader::ScriptLoaderInterface {
   ModuleLoader* GetModuleLoader() { return mModuleLoader; }
 
   void RegisterContentScriptModuleLoader(ModuleLoader* aLoader);
+  void RegisterShadowRealmModuleLoader(ModuleLoader* aLoader);
 
   /**
    *  Check whether to speculatively OMT parse scripts as soon as
@@ -740,6 +741,7 @@ class ScriptLoader final : public JS::loader::ScriptLoaderInterface {
 
   RefPtr<ModuleLoader> mModuleLoader;
   nsTArray<RefPtr<ModuleLoader>> mWebExtModuleLoaders;
+  nsTArray<RefPtr<ModuleLoader>> mShadowRealmModuleLoaders;
 
   // Logging
  public: