diff --git a/app/views/static/bookmarklet.html.erb b/app/views/static/bookmarklet.html.erb
index 7c22609ce..1b319f877 100644
--- a/app/views/static/bookmarklet.html.erb
+++ b/app/views/static/bookmarklet.html.erb
@@ -22,6 +22,9 @@
     <p>Use this bookmarklet on the HTML page of Twitter, Pixiv, or ArtStation
     galleries. It will open a page containing every image in the gallery, ready
     for upload.</p>
+
+    <p>Please note that using the bookmarklet with Firefox on Twitter currently 
+    does not work.</p>
   </div>
 </div>