diff --git a/httpd.mime b/httpd.mime
index 157655749..198a6fefb 100644
--- a/httpd.mime
+++ b/httpd.mime
@@ -76,6 +76,7 @@ wav     = audio/x-wav
 xhtml   = application/xhtml+xml
 xla     = application/msexcel
 xls     = application/msexcel
+xpi		= application/x-xpinstall 
 xsl		= application/xml
 xml     = application/xml
 Z       = application/x-compress