diff --git a/4chan_x.user.js b/4chan_x.user.js
index f0c043e59..cce234d7f 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -2684,8 +2684,10 @@
       l = unread.replies.length;
       favicon = $('link[rel="shortcut icon"]', d.head);
       favicon.href = g.dead ? l ? Favicon.unreadDead : Favicon.dead : l ? Favicon.unread : Favicon["default"];
-      clone = favicon.cloneNode(true);
-      return $.replace(favicon, clone);
+      if (engine === "Gecko") {
+        clone = favicon.cloneNode(true);
+        return $.replace(favicon, clone);
+      }
     }
   };
 
diff --git a/script.coffee b/script.coffee
index fa4f0fec0..f76caa804 100644
--- a/script.coffee
+++ b/script.coffee
@@ -2090,8 +2090,9 @@ Favicon =
           Favicon.default
 
     #XXX `favicon.href = href` doesn't work on Firefox
-    clone = favicon.cloneNode true
-    $.replace favicon, clone
+    if engine is "Gecko"
+      clone = favicon.cloneNode true
+      $.replace favicon, clone
 
 redirect = ->
   switch g.BOARD