diff --git a/source/scriptinterface/ScriptInterface.cpp b/source/scriptinterface/ScriptInterface.cpp
index b8efb32a3b..258653ae57 100644
--- a/source/scriptinterface/ScriptInterface.cpp
+++ b/source/scriptinterface/ScriptInterface.cpp
@@ -1244,128 +1244,12 @@ void ScriptInterface::MaybeGC()
 	JS_MaybeGC(m->m_cx);
 }
 
-class ValueCloner
-{
-public:
-	ValueCloner(ScriptInterface& from, ScriptInterface& to) :
-		scriptInterfaceFrom(from), cxFrom(from.GetContext()), cxTo(to.GetContext()), m_RooterFrom(from), m_RooterTo(to)
-	{
-	}
-
-	// Return the cloned object (or an already-computed object if we've cloned val before)
-	jsval GetOrClone(jsval val)
-	{
-		if (!JSVAL_IS_GCTHING(val) || JSVAL_IS_NULL(val))
-			return val;
-
-		std::map<void*, jsval>::iterator it = m_Mapping.find(JSVAL_TO_GCTHING(val));
-		if (it != m_Mapping.end())
-			return it->second;
-
-		m_RooterFrom.Push(val); // root it so our mapping doesn't get invalidated
-
-		return Clone(val);
-	}
-
-private:
-
-#define CLONE_REQUIRE(expr, msg) if (!(expr)) { debug_warn(L"Internal error in CloneValueFromOtherContext: " msg); return JSVAL_VOID; }
-
-	// Clone a new value (and root it and add it to the mapping)
-	jsval Clone(jsval val)
-	{
-		if (JSVAL_IS_DOUBLE(val))
-		{
-			jsval rval;
-			CLONE_REQUIRE(JS_NewNumberValue(cxTo, JSVAL_TO_DOUBLE(val), &rval), L"JS_NewNumberValue");
-			m_RooterTo.Push(rval);
-			return rval;
-		}
-
-		if (JSVAL_IS_STRING(val))
-		{
-			size_t len;
-			const jschar* chars = JS_GetStringCharsAndLength(cxFrom, JSVAL_TO_STRING(val), &len);
-			CLONE_REQUIRE(chars, L"JS_GetStringCharsAndLength");
-			JSString* str = JS_NewUCStringCopyN(cxTo, chars, len);
-			CLONE_REQUIRE(str, L"JS_NewUCStringCopyN");
-			jsval rval = STRING_TO_JSVAL(str);
-			m_Mapping[JSVAL_TO_GCTHING(val)] = rval;
-			m_RooterTo.Push(rval);
-			return rval;
-		}
-
-		ENSURE(JSVAL_IS_OBJECT(val));
-
-		JSObject* newObj;
-		if (JS_IsArrayObject(cxFrom, JSVAL_TO_OBJECT(val)))
-		{
-			jsuint length;
-			CLONE_REQUIRE(JS_GetArrayLength(cxFrom, JSVAL_TO_OBJECT(val), &length), L"JS_GetArrayLength");
-			newObj = JS_NewArrayObject(cxTo, length, NULL);
-			CLONE_REQUIRE(newObj, L"JS_NewArrayObject");
-		}
-		else
-		{
-			newObj = JS_NewObject(cxTo, NULL, NULL, NULL);
-			CLONE_REQUIRE(newObj, L"JS_NewObject");
-		}
-
-		m_Mapping[JSVAL_TO_GCTHING(val)] = OBJECT_TO_JSVAL(newObj);
-		m_RooterTo.Push(newObj);
-
-		AutoJSIdArray ida (cxFrom, JS_Enumerate(cxFrom, JSVAL_TO_OBJECT(val)));
-		CLONE_REQUIRE(ida.get(), L"JS_Enumerate");
-
-		AutoGCRooter idaRooter(scriptInterfaceFrom);
-		idaRooter.Push(ida.get());
-
-		for (size_t i = 0; i < ida.length(); ++i)
-		{
-			jsid id = ida[i];
-			jsval idval, propval;
-			CLONE_REQUIRE(JS_IdToValue(cxFrom, id, &idval), L"JS_IdToValue");
-			CLONE_REQUIRE(JS_GetPropertyById(cxFrom, JSVAL_TO_OBJECT(val), id, &propval), L"JS_GetPropertyById");
-			jsval newPropval = GetOrClone(propval);
-
-			if (JSVAL_IS_INT(idval))
-			{
-				// int jsids are portable across runtimes
-				CLONE_REQUIRE(JS_SetPropertyById(cxTo, newObj, id, &newPropval), L"JS_SetPropertyById");
-			}
-			else if (JSVAL_IS_STRING(idval))
-			{
-				// string jsids are runtime-specific, so we need to copy the string content
-				JSString* idstr = JS_ValueToString(cxFrom, idval);
-				CLONE_REQUIRE(idstr, L"JS_ValueToString (id)");
-				size_t len;
-				const jschar* chars = JS_GetStringCharsAndLength(cxFrom, idstr, &len);
-				CLONE_REQUIRE(idstr, L"JS_GetStringCharsAndLength (id)");
-				CLONE_REQUIRE(JS_SetUCProperty(cxTo, newObj, chars, len, &newPropval), L"JS_SetUCProperty");
-			}
-			else
-			{
-				// this apparently could be an XML object; ignore it
-			}
-		}
-
-		return OBJECT_TO_JSVAL(newObj);
-	}
-
-	ScriptInterface& scriptInterfaceFrom;
-	JSContext* cxFrom;
-	JSContext* cxTo;
-	std::map<void*, jsval> m_Mapping;
-	AutoGCRooter m_RooterFrom;
-	AutoGCRooter m_RooterTo;
-};
-
 jsval ScriptInterface::CloneValueFromOtherContext(ScriptInterface& otherContext, jsval val)
 {
 	PROFILE("CloneValueFromOtherContext");
-
-	ValueCloner cloner(otherContext, *this);
-	return cloner.GetOrClone(val);
+	shared_ptr<StructuredClone> structuredClone = otherContext.WriteStructuredClone(val);
+	jsval clone = ReadStructuredClone(structuredClone);
+	return clone;
 }
 
 ScriptInterface::StructuredClone::StructuredClone() :