Update Contributors.md

2015-03-03 11:29:22 +00:00 · 2015-03-03 11:29:22 +00:00 · 10098f8701
--- a/Contributors.md
+++ b/Contributors.md
@ -59,6 +59,7 @@ We'd like to thank the following Mozillians and community members who have contr
 * Joerg Lohrer
 * John Bevan
 * John Martin
+* Jon Kruithof
 * Josie Fraser
 * Joyce Seitzinger
 * Justin Crawford