diff --git a/404.html b/404.html
index 31ccad0c3d..b5ea1ac4ec 100644
--- a/404.html
+++ b/404.html
@@ -5,6 +5,9 @@
 body { text-align: center;}
 h1 { font-size: 50px; }
 body { font: 20px Constantia, 'Hoefler Text',  "Adobe Caslon Pro", Baskerville, Georgia, Times, serif; color: #999; text-shadow: 2px 2px 2px rgba(200, 200, 200, 0.5); }
+::-moz-selection{ background:#FF5E99; color:#fff; }
+::selection { background:#FF5E99; color:#fff; } 
+details { display:block; }
 a { color: rgb(36, 109, 56); text-decoration:none; }
 a:hover { color: rgb(96, 73, 141) ; text-shadow: 2px 2px 2px rgba(36, 109, 56, 0.5); }
 span[frown] { transform: rotate(90deg); display:inline-block; color: #bbb; }