Update firefox.js

Author: helloworldSB

src/assets/static/firefox/firefox.js

@@ -1,6 +1,6 @@
-const url = new URL(window.location.href);
-
+'use strict';
+const url = new URL(window.location);
 if (url.searchParams.get('target') !== 't') {
-	url.searchParams.set('target', 't')
-    window.location.href = url.toString();
+    url.searchParams.set('target', 't');
+    window.location.href = url.href;
 }