corrected as advised

src/headless/utils/url.js

@@ -21,7 +21,8 @@ export function getURI (url) {
 
 function checkFileTypes (types, url) {
     const uri = getURI(url);
-    if (window.location.protocol !== 'chrome-extension:' && (uri === null || !checkTLS(uri))) {
+	
+    if (uri === null || (window.location.protocol !== 'chrome-extension:' && !checkTLS(uri))) {
         return false;
     }
     const filename = uri.filename().toLowerCase();