fix warnings

lib/single-file/processors/hooks/content/content-hooks-frames.js

@@ -44,7 +44,7 @@ const addEventListener = (type, listener, options) => globalThis.addEventListene
 const dispatchEvent = event => globalThis.dispatchEvent(event);
 const CustomEvent = globalThis.CustomEvent;
 const document = globalThis.document;
-const HTMLDocument = globalThis.HTMLDocument;
+const Document = globalThis.Document;
 
 let fontFaces;
 if (window._singleFile_fontFaces) {
@@ -53,7 +53,7 @@ if (window._singleFile_fontFaces) {
 	fontFaces = window._singleFile_fontFaces = new Map();
 }
 
-if (document instanceof HTMLDocument) {
+if (document instanceof Document) {
 	if (browser && browser.runtime && browser.runtime.getURL) {
 		addEventListener(NEW_FONT_FACE_EVENT, event => {
 			const detail = event.detail;

lib/single-file/processors/hooks/content/content-hooks.js

@@ -25,9 +25,9 @@
 
 const browser = globalThis.browser;
 const document = globalThis.document;
-const HTMLDocument = globalThis.HTMLDocument;
+const Document = globalThis.Document;
 
-if (document instanceof HTMLDocument) {
+if (document instanceof Document) {
 	const scriptElement = document.createElement("script");
 	scriptElement.async = false;
 	if (browser && browser.runtime && browser.runtime.getURL) {