Did you ever notice that if you encounter a CF error and use IE, the error template collapses, and hides, the stack trace? Of course, no one I know actually uses IE. All the cool kids use Firefox. Well, it is trivial to update your exception template to hide the strack traces in Firefox as well.
Open up /web-inf/exception/detail.cfm and find this line:
<cfset bIE = (cgi.user_agent contains "MSIE")>
and change it to:
<cfset bIE = (cgi.user_agent contains "MSIE" or cgi.user_agent contains "Firefox")>
That's it. Enjoy.