Protection for document.write and document.wirteln broke in Firefox 69

Fixes #357

lib/iframeProtection.js

@@ -142,6 +142,9 @@
 		const documentWriteDescriptor = Object.getOwnPropertyDescriptor(
 			wrappedWindow.HTMLDocument.prototype,
 			"write"
+		) || Object.getOwnPropertyDescriptor(
+			wrappedWindow.Document.prototype,
+			"write"
 		);
 		const documentWrite = documentWriteDescriptor.value;
 		documentWriteDescriptor.value = exportFunction(function write(str){
@@ -161,6 +164,9 @@
 		const documentWritelnDescriptor = Object.getOwnPropertyDescriptor(
 			wrappedWindow.HTMLDocument.prototype,
 			"writeln"
+		) || Object.getOwnPropertyDescriptor(
+			wrappedWindow.Document.prototype,
+			"writeln"
 		);
 		const documentWriteln = documentWritelnDescriptor.value;
 		documentWritelnDescriptor.value = exportFunction(function writeln(str){

releaseNotes.txt

@@ -7,6 +7,7 @@ Version 0.5.10:
 	
 	fixes:
 		- setter for innerHTML broke pages
+		- protection for document.write and document.wirteln broke in Firefox 69
 	
 	known issues:
 		- if a data URL is blocked the page action button does not appear