[Zope] Security question

[Daniel.Weber@SEMATECH.Org]

As far as authorization goes, I've noticed that I get prompted for a
user-name/password only once during a session.  After you've been validated, it
appears zope does not prompt you again for that browser session.

The reason I'm concerned is that if I have to do maintenance on someone else's
web browser, how do I ensure that after I leave a person cannot use the back
button or history list to gain manager access to the site?  Do I have to exit
the browser when I'm done?