[vasa1]

Thanks, Ocky and tlu. I took the jump!

aes@aes-Inspiron-1545:~$ sudo aa-enforce /etc/apparmor.d/usr.bin.firefox
[sudo] password for aes: 
Setting /etc/apparmor.d/usr.bin.firefox to enforce mode.
aes@aes-Inspiron-1545:~$ 

and

aes@aes-Inspiron-1545:~$ sudo aa-status
apparmor module is loaded.
16 profiles are loaded.
16 profiles are in enforce mode.
   /sbin/dhclient
   /usr/bin/evince
   /usr/bin/evince-previewer
   /usr/bin/evince-thumbnailer
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/connman/scripts/dhclient-script
   /usr/lib/cups/backend/cups-pdf
   /usr/lib/firefox-7.0.1/firefox{,*[^s][^h]}
   /usr/lib/firefox-7.0.1/firefox{,*[^s][^h]}//browser_java
   /usr/lib/firefox-7.0.1/firefox{,*[^s][^h]}//browser_openjdk
   /usr/lib/lightdm/lightdm-guest-session-wrapper
   /usr/lib/telepathy/mission-control-5
   /usr/lib/telepathy/telepathy-*
   /usr/sbin/cupsd
   /usr/sbin/tcpdump
   /usr/share/gdm/guest-session/Xsession
0 profiles are in complain mode.
2 processes have profiles defined.
2 processes are in enforce mode.
   /usr/lib/telepathy/mission-control-5 (1661) 
   /usr/sbin/cupsd (1090) 
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
aes@aes-Inspiron-1545:~$