diff --git a/src/document/libdom/doc.c b/src/document/libdom/doc.c
index 2d714760..65052156 100644
--- a/src/document/libdom/doc.c
+++ b/src/document/libdom/doc.c
@@ -132,12 +132,18 @@ document_parse(struct document *document, struct string *source)
 void
 free_document(void *doc)
 {
+#ifdef ECMASCRIPT_DEBUG
+	fprintf(stderr, "%s:%s\n", __FILE__, __FUNCTION__);
+#endif
 	if (!doc) {
 		return;
 	}
 	dom_html_document *ddd = (dom_html_document *)doc;
 
 	if (((dom_node *)ddd)->refcnt > 0) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(ddd);
 	}
 }
diff --git a/src/ecmascript/mujs.c b/src/ecmascript/mujs.c
index 7f4b914e..5f453712 100644
--- a/src/ecmascript/mujs.c
+++ b/src/ecmascript/mujs.c
@@ -147,7 +147,6 @@ mujs_get_interpreter(struct ecmascript_interpreter *interpreter)
 	mjs_localstorage_init(J);
 	mjs_element_init(J);
 	mjs_location_init(J);
-	mjs_push_document(J, document->dom);
 	mjs_xhr_init(J);
 	mjs_event_init(J);
 	mjs_keyboardEvent_init(J);
@@ -156,6 +155,8 @@ mujs_get_interpreter(struct ecmascript_interpreter *interpreter)
 	mjs_url_init(J);
 	mjs_domparser_init(J);
 
+	mjs_push_document(J, document->dom);
+
 	return J;
 #if 0
 
diff --git a/src/ecmascript/mujs/document.c b/src/ecmascript/mujs/document.c
index dea18f44..93508439 100644
--- a/src/ecmascript/mujs/document.c
+++ b/src/ecmascript/mujs/document.c
@@ -178,6 +178,9 @@ mjs_document_get_property_body(js_State *J)
 		return;
 	}
 	mjs_push_element(J, body);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(body);
 }
 
@@ -290,6 +293,9 @@ mjs_document_get_property_childNodes(js_State *J)
 	}
 	dom_nodelist *nodes = NULL;
 	exc = dom_node_get_child_nodes(root, &nodes);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (exc != DOM_NO_ERR || !nodes) {
@@ -345,6 +351,9 @@ mjs_document_get_property_documentElement(js_State *J)
 		return;
 	}
 	mjs_push_element(J, root);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 }
 
@@ -1093,6 +1102,9 @@ mjs_document_createComment(js_State *J)
 		return;
 	}
 	mjs_push_element(J, comment);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(comment);
 }
 
@@ -1116,6 +1128,9 @@ mjs_document_createDocumentFragment(js_State *J)
 		return;
 	}
 	mjs_push_element(J, fragment);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(fragment);
 }
 
@@ -1149,6 +1164,9 @@ mjs_document_createElement(js_State *J)
 		return;
 	}
 	mjs_push_element(J, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 }
 
@@ -1182,6 +1200,9 @@ mjs_document_createTextNode(js_State *J)
 		return;
 	}
 	mjs_push_element(J, text_node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(text_node);
 }
 
@@ -1220,6 +1241,9 @@ mjs_document_getElementById(js_State *J)
 		return;
 	}
 	mjs_push_element(J, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 }
 
@@ -1350,11 +1374,17 @@ mjs_document_querySelector(js_State *J)
 	const char *selector = js_tostring(J, 1);
 
 	if (!selector) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(root);
 		js_pushnull(J);
 		return;
 	}
 	void *ret = walk_tree_query(root, selector, 0);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (!ret) {
@@ -1362,6 +1392,9 @@ mjs_document_querySelector(js_State *J)
 		return;
 	}
 	mjs_push_element(J, ret);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(ret);
 }
 
@@ -1388,6 +1421,9 @@ mjs_document_querySelectorAll(js_State *J)
 	const char *selector = js_tostring(J, 1);
 
 	if (!selector) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc_root);
 		js_pushnull(J);
 		return;
@@ -1395,12 +1431,18 @@ mjs_document_querySelectorAll(js_State *J)
 	LIST_OF(struct selector_node) *result_list = (LIST_OF(struct selector_node) *)mem_calloc(1, sizeof(*result_list));
 
 	if (!result_list) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc_root);
 		js_pushnull(J);
 		return;
 	}
 	init_list(*result_list);
 	walk_tree_query_append(doc_root, selector, 0, result_list);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(doc_root);
 	mjs_push_nodelist2(J, result_list);
 }
@@ -1556,6 +1598,9 @@ mjs_doctype_finalizer(js_State *J, void *node)
 	attr_erase_from_map(map_doctypes, node);
 
 	if (node) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref((dom_node *)node);
 	}
 }
@@ -1595,6 +1640,9 @@ mjs_doc_private_finalizer(js_State *J, void *priv)
 		}
 		free_list(doc_private->listeners);
 		if (doc_private->node) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(doc_private->node);
 		}
 		if (doc_private->thisval) {
@@ -1672,6 +1720,9 @@ mjs_push_document(js_State *J, void *doc)
 	doc_private->ref_count = 1;
 	doc_private->thisval = js_ref(J);
 	if (doc) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_ref((dom_node *)doc);
 	}
 }
@@ -1744,6 +1795,9 @@ mjs_push_document2(js_State *J, void *doc)
 	doc_private->ref_count = 1;
 	//doc_private->thisval = js_ref(J);
 	if (doc) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_ref((dom_node *)doc);
 	}
 }
diff --git a/src/ecmascript/mujs/element.c b/src/ecmascript/mujs/element.c
index d7d87a11..f5791305 100644
--- a/src/ecmascript/mujs/element.c
+++ b/src/ecmascript/mujs/element.c
@@ -265,9 +265,15 @@ mjs_element_get_property_classList(js_State *J)
 		js_pushnull(J);
 		return;
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_ref(el);
 	dom_tokenlist *tl = NULL;
 	dom_exception exc = dom_tokenlist_create(el, corestring_dom_class, &tl);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(el);
 
 	if (exc != DOM_NO_ERR || !tl) {
@@ -520,6 +526,9 @@ mjs_element_get_property_firstChild(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -567,9 +576,15 @@ mjs_element_get_property_firstElementChild(js_State *J)
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			dom_nodelist_unref(nodes);
 			mjs_push_element(J, child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(child);
 			return;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	dom_nodelist_unref(nodes);
@@ -683,6 +698,9 @@ mjs_element_get_property_lastChild(js_State *J)
 		return;
 	}
 	mjs_push_element(J, last_child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(last_child);
 }
 
@@ -729,9 +747,15 @@ mjs_element_get_property_lastElementChild(js_State *J)
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			dom_nodelist_unref(nodes);
 			mjs_push_element(J, child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(child);
 			return;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	dom_nodelist_unref(nodes);
@@ -760,6 +784,9 @@ mjs_element_get_property_nextElementSibling(js_State *J)
 		dom_node_type type;
 
 		if (prev_next) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_next);
 		}
 
@@ -771,6 +798,9 @@ mjs_element_get_property_nextElementSibling(js_State *J)
 
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			mjs_push_element(J, next);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(next);
 			return;
 		}
@@ -872,6 +902,9 @@ mjs_element_get_property_nextSibling(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -946,6 +979,9 @@ mjs_element_get_property_offsetLeft(js_State *J)
 		return;
 	}
 	int dx = int_max(0, (rect->x0 - rect_parent->x0) * ses->tab->term->cell_width);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 	js_pushnumber(J, dx);
 }
@@ -972,6 +1008,9 @@ mjs_element_get_property_offsetParent(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -1035,6 +1074,9 @@ mjs_element_get_property_offsetTop(js_State *J)
 		return;
 	}
 	int dy = int_max(0, (rect->y0 - rect_parent->y0) * ses->tab->term->cell_height);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 	js_pushnumber(J, dy);
 }
@@ -1083,6 +1125,9 @@ mjs_element_get_property_parentElement(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -1107,6 +1152,9 @@ mjs_element_get_property_parentNode(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -1132,6 +1180,9 @@ mjs_element_get_property_previousElementSibling(js_State *J)
 		dom_node_type type;
 
 		if (prev_prev) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_prev);
 		}
 
@@ -1143,6 +1194,9 @@ mjs_element_get_property_previousElementSibling(js_State *J)
 
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			mjs_push_element(J, prev);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev);
 			return;
 		}
@@ -1173,6 +1227,9 @@ mjs_element_get_property_previousSibling(js_State *J)
 		return;
 	}
 	mjs_push_element(J, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 }
 
@@ -1633,8 +1690,14 @@ mjs_element_set_property_innerHtml(js_State *J)
 		struct dom_node *cref;
 		exc = dom_node_remove_child(el, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 		exc = dom_node_get_first_child(el, &child);
 		if (exc != DOM_NO_ERR) goto out;
@@ -1663,10 +1726,19 @@ mjs_element_set_property_innerHtml(js_State *J)
 		struct dom_node *cref;
 		exc = dom_node_remove_child(body, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 		exc = dom_node_append_child(el, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
 		exc = dom_node_get_first_child(body, &child);
@@ -1677,21 +1749,36 @@ out:
 		dom_hubbub_parser_destroy(parser);
 	}
 	if (doc != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc);
 	}
 	if (fragment != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(fragment);
 	}
 	if (child != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	if (html != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(html);
 	}
 	if (bodies != NULL) {
 		dom_nodelist_unref(bodies);
 	}
 	if (body != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(body);
 	}
 	interpreter->changed = 1;
@@ -1834,14 +1921,26 @@ mjs_element_set_property_outerHtml(js_State *J)
 	while (child != NULL) {
 		exc = dom_node_remove_child(body, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 
 		dom_node *spare = NULL;
 		exc = dom_node_insert_before(parent, child, el, &spare);
 
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(spare);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
 		exc = dom_node_get_first_child(body, &child);
@@ -1855,26 +1954,47 @@ out:
 		dom_hubbub_parser_destroy(parser);
 	}
 	if (doc != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc);
 	}
 	if (fragment != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(fragment);
 	}
 	if (child != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	if (html != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(html);
 	}
 	if (bodies != NULL) {
 		dom_nodelist_unref(bodies);
 	}
 	if (body != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(body);
 	}
 	if (cref != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(parent);
 	interpreter->changed = 1;
 
@@ -2209,6 +2329,9 @@ mjs_element_appendChild(js_State *J)
 	if (exc == DOM_NO_ERR && res) {
 		interpreter->changed = 1;
 		mjs_push_element(J, res);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(res);
 		return;
 	}
@@ -2302,6 +2425,9 @@ mjs_element_cloneNode(js_State *J)
 		return;
 	}
 	mjs_push_element(J, clone);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(clone);
 }
 
@@ -2314,6 +2440,9 @@ isAncestor(dom_node *el, dom_node *node)
 		dom_exception exc;
 		dom_node *next = NULL;
 		if (prev_next) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_next);
 		}
 		if (el == node) {
@@ -2378,6 +2507,9 @@ mjs_element_closest(js_State *J)
 		}
 		el = node;
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (!res) {
@@ -2385,6 +2517,9 @@ mjs_element_closest(js_State *J)
 		return;
 	}
 	mjs_push_element(J, res);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(res);
 }
 
@@ -2406,12 +2541,24 @@ mjs_element_contains(js_State *J)
 		js_pushboolean(J, 0);
 		return;
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_ref(el);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_ref(el2);
 
 	while (1) {
 		if (el == el2) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el2);
 			js_pushboolean(J, 1);
 			return;
@@ -2420,11 +2567,20 @@ mjs_element_contains(js_State *J)
 		dom_exception exc = dom_node_get_parent_node(el2, &node);
 
 		if (exc != DOM_NO_ERR || !node) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el2);
 			js_pushboolean(J, 0);
 			return;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(el2);
 		el2 = node;
 	}
@@ -2721,6 +2877,9 @@ mjs_element_insertBefore(js_State *J)
 	}
 	interpreter->changed = 1;
 	mjs_push_element(J, spare);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(spare);
 }
 
@@ -2823,6 +2982,9 @@ mjs_element_querySelector(js_State *J)
 		return;
 	}
 	mjs_push_element(J, ret);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(ret);
 }
 
@@ -2886,9 +3048,15 @@ mjs_element_remove(js_State *J)
 	}
 	dom_node *res = NULL;
 	exc = dom_node_remove_child(parent, el, &res);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(parent);
 
 	if (exc == DOM_NO_ERR) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(res);
 		interpreter->changed = 1;
 	}
@@ -2944,6 +3112,9 @@ mjs_element_removeChild(js_State *J)
 	if (exc == DOM_NO_ERR && spare) {
 		interpreter->changed = 1;
 		mjs_push_element(J, spare);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(spare);
 		return;
 	}
@@ -3067,6 +3238,9 @@ mjs_element_finalizer(js_State *J, void *priv)
 			free_list(el_private->listeners);
 
 			if (node && (node->refcnt > 0)) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 				dom_node_unref(node);
 			}
 			if (el_private->thisval) {
@@ -3110,6 +3284,9 @@ mjs_push_element(js_State *J, void *node)
 		el_private->interpreter = interpreter;
 		el_private->node = node;
 		el_private->ref_count = 1;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_ref((dom_node *)node);
 
 		attr_save_in_map(map_privates, node, el_private);
diff --git a/src/ecmascript/mujs/nodelist.c b/src/ecmascript/mujs/nodelist.c
index 7f178c61..1b5e4adb 100644
--- a/src/ecmascript/mujs/nodelist.c
+++ b/src/ecmascript/mujs/nodelist.c
@@ -47,6 +47,9 @@ mjs_push_nodeList_item2(js_State *J, int idx)
 		return;
 	}
 	mjs_push_element(J, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 }
 
@@ -89,6 +92,9 @@ mjs_nodeList_set_items(js_State *J, void *node)
 		}
 		mjs_push_element(J, element);
 		js_setindex(J, -2, i);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(element);
 	}
 	js_setlength(J, -1, length);
diff --git a/src/ecmascript/quickjs/document.c b/src/ecmascript/quickjs/document.c
index 52c2b864..164c9bc1 100644
--- a/src/ecmascript/quickjs/document.c
+++ b/src/ecmascript/quickjs/document.c
@@ -186,6 +186,9 @@ js_document_get_property_body(JSContext *ctx, JSValueConst this_val)
 	}
 	//dom_node_unref(doc);
 	JSValue rr = getElement(ctx, body);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(body);
 
 	return rr;
@@ -318,6 +321,9 @@ js_document_get_property_childNodes(JSContext *ctx, JSValueConst this_val)
 	}
 	dom_nodelist *nodes = NULL;
 	exc = dom_node_get_child_nodes(root, &nodes);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (exc != DOM_NO_ERR || !nodes) {
@@ -387,6 +393,9 @@ js_document_get_property_documentElement(JSContext *ctx, JSValueConst this_val)
 	}
 	//dom_node_unref(doc);
 	JSValue rr = getElement(ctx, root);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	return rr;
@@ -1351,6 +1360,9 @@ js_document_createElement(JSContext *ctx, JSValueConst this_val, int argc, JSVal
 	}
 	//dom_node_unref(doc);
 	JSValue rr = getElement(ctx, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 
 	return rr;
@@ -1451,6 +1463,9 @@ js_document_getElementById(JSContext *ctx, JSValueConst this_val, int argc, JSVa
 	}
 	//dom_node_unref(doc);
 	JSValue rr = getElement(ctx, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 
 	return rr;
@@ -1616,11 +1631,17 @@ js_document_querySelector(JSContext *ctx, JSValueConst this_val, int argc, JSVal
 
 	if (!selector) {
 		//dom_node_unref(doc);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(root);
 		return JS_NULL;
 	}
 	void *ret = walk_tree_query(root, selector, 0);
 	JS_FreeCString(ctx, selector);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (!ret) {
@@ -1662,6 +1683,9 @@ js_document_querySelectorAll(JSContext *ctx, JSValueConst this_val, int argc, JS
 
 	if (!selector) {
 		//dom_node_unref(doc);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc_root);
 		return JS_NULL;
 	}
@@ -1669,6 +1693,9 @@ js_document_querySelectorAll(JSContext *ctx, JSValueConst this_val, int argc, JS
 
 	if (!result_list) {
 		//dom_node_unref(doc);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc_root);
 		JS_FreeCString(ctx, selector);
 		return JS_NULL;
@@ -1676,6 +1703,9 @@ js_document_querySelectorAll(JSContext *ctx, JSValueConst this_val, int argc, JS
 	init_list(*result_list);
 
 	walk_tree_query_append(doc_root, selector, 0, result_list);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(doc_root);
 	JS_FreeCString(ctx, selector);
 	//dom_node_unref(doc);
@@ -1850,6 +1880,9 @@ js_document_finalizer(JSRuntime *rt, JSValue val)
 		}
 		free_list(doc_private->listeners);
 		if (doc_private->node) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref((dom_node *)doc_private->node);
 		}
 		mem_free(doc_private);
@@ -1892,6 +1925,9 @@ js_doctype_finalizer(JSRuntime *rt, JSValue val)
 	attr_erase_from_map_str(map_doctypes, node);
 
 	if (node) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(node);
 	}
 }
@@ -1969,6 +2005,9 @@ getDocument(JSContext *ctx, void *doc)
 	init_list(doc_private->listeners);
 
 	if (doc) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_ref((dom_node *)doc);
 	}
 	doc_private->node = doc;
diff --git a/src/ecmascript/quickjs/element.c b/src/ecmascript/quickjs/element.c
index 820be976..0d282489 100644
--- a/src/ecmascript/quickjs/element.c
+++ b/src/ecmascript/quickjs/element.c
@@ -609,6 +609,9 @@ js_element_get_property_firstChild(JSContext *ctx, JSValueConst this_val)
 		return JS_NULL;
 	}
 	JSValue rr = getElement(ctx, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 
 	return rr;
@@ -660,9 +663,15 @@ js_element_get_property_firstElementChild(JSContext *ctx, JSValueConst this_val)
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			dom_nodelist_unref(nodes);
 			JSValue rr = getElement(ctx, child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(child);
 			return rr;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	dom_nodelist_unref(nodes);
@@ -796,6 +805,9 @@ js_element_get_property_lastChild(JSContext *ctx, JSValueConst this_val)
 		return JS_NULL;
 	}
 	JSValue rr = getElement(ctx, last_child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(last_child);
 
 	return rr;
@@ -846,9 +858,15 @@ js_element_get_property_lastElementChild(JSContext *ctx, JSValueConst this_val)
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			dom_nodelist_unref(nodes);
 			JSValue rr = getElement(ctx, child);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(child);
 			return rr;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	dom_nodelist_unref(nodes);
@@ -881,6 +899,9 @@ js_element_get_property_nextElementSibling(JSContext *ctx, JSValueConst this_val
 		dom_node_type type;
 
 		if (prev_next) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_next);
 		}
 
@@ -891,6 +912,9 @@ js_element_get_property_nextElementSibling(JSContext *ctx, JSValueConst this_val
 
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			JSValue rr = getElement(ctx, next);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(next);
 			return rr;
 		}
@@ -1015,6 +1039,9 @@ js_element_get_property_nextSibling(JSContext *ctx, JSValueConst this_val)
 	}
 	//dom_node_unref(el);
 	JSValue rr = getElement(ctx, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 
 	return rr;
@@ -1083,6 +1110,9 @@ js_element_get_property_offsetLeft(JSContext *ctx, JSValueConst this_val)
 		return JS_NewInt32(ctx, 0);
 	}
 	int dx = int_max(0, (rect->x0 - rect_parent->x0) * ses->tab->term->cell_width);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 	return JS_NewInt32(ctx, dx);
 }
@@ -1166,6 +1196,9 @@ js_element_get_property_offsetTop(JSContext *ctx, JSValueConst this_val)
 		return JS_NewInt32(ctx, 0);
 	}
 	int dy = int_max(0, (rect->y0 - rect_parent->y0) * ses->tab->term->cell_height);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 	return JS_NewInt32(ctx, dy);
 }
@@ -1219,6 +1252,9 @@ js_element_get_property_parentElement(JSContext *ctx, JSValueConst this_val)
 		return JS_NULL;
 	}
 	JSValue rr = getElement(ctx, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 
 	return rr;
@@ -1246,6 +1282,9 @@ js_element_get_property_parentNode(JSContext *ctx, JSValueConst this_val)
 		return JS_NULL;
 	}
 	JSValue rr = getElement(ctx, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 
 	return rr;
@@ -1275,6 +1314,9 @@ js_element_get_property_previousElementSibling(JSContext *ctx, JSValueConst this
 		dom_node_type type;
 
 		if (prev_prev) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_prev);
 		}
 
@@ -1285,6 +1327,9 @@ js_element_get_property_previousElementSibling(JSContext *ctx, JSValueConst this
 
 		if (exc == DOM_NO_ERR && type == DOM_ELEMENT_NODE) {
 			JSValue rr = getElement(ctx, prev);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev);
 			return rr;
 		}
@@ -1319,6 +1364,9 @@ js_element_get_property_previousSibling(JSContext *ctx, JSValueConst this_val)
 	}
 	//dom_node_unref(el);
 	JSValue rr = getElement(ctx, node);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(node);
 
 	return rr;
@@ -1780,8 +1828,14 @@ js_element_set_property_innerHtml(JSContext *ctx, JSValueConst this_val, JSValue
 		struct dom_node *cref;
 		exc = dom_node_remove_child(el, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 		exc = dom_node_get_first_child(el, &child);
 		if (exc != DOM_NO_ERR) goto out;
@@ -1810,10 +1864,19 @@ js_element_set_property_innerHtml(JSContext *ctx, JSValueConst this_val, JSValue
 		struct dom_node *cref;
 		exc = dom_node_remove_child(body, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 		exc = dom_node_append_child(el, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
 		exc = dom_node_get_first_child(body, &child);
@@ -1824,21 +1887,36 @@ out:
 		dom_hubbub_parser_destroy(parser);
 	}
 	if (doc != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc);
 	}
 	if (fragment != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(fragment);
 	}
 	if (child != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	if (html != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(html);
 	}
 	if (bodies != NULL) {
 		dom_nodelist_unref(bodies);
 	}
 	if (body != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(body);
 	}
 	JS_FreeCString(ctx, s);
@@ -1992,14 +2070,26 @@ js_element_set_property_outerHtml(JSContext *ctx, JSValueConst this_val, JSValue
 	while (child != NULL) {
 		exc = dom_node_remove_child(body, child, &cref);
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 
 		dom_node *spare = NULL;
 		exc = dom_node_insert_before(parent, child, el, &spare);
 
 		if (exc != DOM_NO_ERR) goto out;
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(spare);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 		child = NULL;
 		exc = dom_node_get_first_child(body, &child);
@@ -2013,26 +2103,47 @@ out:
 		dom_hubbub_parser_destroy(parser);
 	}
 	if (doc != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(doc);
 	}
 	if (fragment != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(fragment);
 	}
 	if (child != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(child);
 	}
 	if (html != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(html);
 	}
 	if (bodies != NULL) {
 		dom_nodelist_unref(bodies);
 	}
 	if (body != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(body);
 	}
 	if (cref != NULL) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(cref);
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(parent);
 	JS_FreeCString(ctx, s);
 	interpreter->changed = 1;
@@ -2460,6 +2571,9 @@ js_element_appendChild(JSContext *ctx, JSValueConst this_val, int argc, JSValueC
 		interpreter->changed = 1;
 		//dom_node_unref(el);
 		JSValue rr = getElement(ctx, res);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(res);
 
 		return rr;
@@ -2570,6 +2684,9 @@ js_element_cloneNode(JSContext *ctx, JSValueConst this_val, int argc, JSValueCon
 	}
 	//dom_node_unref(el);
 	JSValue rr = getElement(ctx, clone);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(clone);
 
 	return rr;
@@ -2584,6 +2701,9 @@ isAncestor(dom_node *el, dom_node *node)
 		dom_exception exc;
 		dom_node *next = NULL;
 		if (prev_next) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(prev_next);
 		}
 		if (el == node) {
@@ -2640,6 +2760,9 @@ js_element_closest(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst
 	dom_node *el_copy = el;
 
 	if (el_copy) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_ref(el_copy);
 	}
 
@@ -2660,9 +2783,15 @@ js_element_closest(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst
 		el = node;
 	}
 	JS_FreeCString(ctx, selector);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(root);
 
 	if (el_copy) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(el_copy);
 	}
 
@@ -2698,11 +2827,17 @@ js_element_contains(JSContext *ctx, JSValueConst this_val, int argc, JSValueCons
 		//dom_node_unref(el);
 		return JS_FALSE;
 	}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_ref(el2);
 
 	while (1) {
 		if (el == el2) {
 			//dom_node_unref(el);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el2);
 			return JS_TRUE;
 		}
@@ -2711,9 +2846,15 @@ js_element_contains(JSContext *ctx, JSValueConst this_val, int argc, JSValueCons
 
 		if (exc != DOM_NO_ERR || !node) {
 			//dom_node_unref(el);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 			dom_node_unref(el2);
 			return JS_FALSE;
 		}
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(el2);
 		el2 = node;
 	}
@@ -3241,6 +3382,9 @@ js_element_querySelector(JSContext *ctx, JSValueConst this_val, int argc, JSValu
 	}
 	//dom_node_unref(el);
 	JSValue rr = getElement(ctx, ret);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref((dom_node *)ret);
 
 	return rr;
@@ -3319,9 +3463,15 @@ js_element_remove(JSContext *ctx, JSValueConst this_val, int argc, JSValueConst
 	}
 	dom_node *res = NULL;
 	exc = dom_node_remove_child(parent, el, &res);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(parent);
 
 	if (exc == DOM_NO_ERR) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(res);
 		interpreter->changed = 1;
 	}
@@ -3631,6 +3781,9 @@ void js_element_finalizer(JSRuntime *rt, JSValue val)
 				(void *) &old_node_data);
 
 			if (el->refcnt > 0) {
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 				dom_node_unref(el);
 			}
 		}
@@ -3737,6 +3890,9 @@ getElement(JSContext *ctx, void *node)
 
 	JS_SetPropertyFunctionList(ctx, element_obj, js_element_proto_funcs, countof(js_element_proto_funcs));
 	JS_SetClassProto(ctx, js_element_class_id, element_obj);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_ref((dom_node *)node);
 	JS_SetOpaque(element_obj, el_private);
 
diff --git a/src/ecmascript/quickjs/nodelist.c b/src/ecmascript/quickjs/nodelist.c
index cb6fecc3..39543fb1 100644
--- a/src/ecmascript/quickjs/nodelist.c
+++ b/src/ecmascript/quickjs/nodelist.c
@@ -105,6 +105,9 @@ js_nodeList_item2(JSContext *ctx, JSValueConst this_val, int idx)
 		return JS_UNDEFINED;
 	}
 	ret = getElement(ctx, element);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 	dom_node_unref(element);
 	dom_nodelist_unref(nl);
 
@@ -166,6 +169,9 @@ js_nodeList_set_items(JSContext *ctx, JSValue this_val, void *node)
 
 		JS_SetPropertyUint32(ctx, this_val, i, JS_DupValue(ctx, obj));
 		JS_FreeValue(ctx, obj);
+#ifdef ECMASCRIPT_DEBUG
+fprintf(stderr, "Before: %s:%d\n", __FUNCTION__, __LINE__);
+#endif
 		dom_node_unref(element);
 	}
 	dom_nodelist_unref(nl);