cameronc@ubuntu:~$ sudo dpkg -r firefox
dpkg: dependency problems prevent removal of firefox:
 firefox-gnome-support depends on firefox.
 xul-ext-unity depends on firefox (>= 10.0).
 xul-ext-websites-integration depends on firefox (>= 9.0).
 firefox-globalmenu depends on firefox (= 18.0.2+build1-0ubuntu0.12.10.1).
 lightdm-remote-session-uccsconfigure depends on firefox.

dpkg: error processing firefox (--remove):
 dependency problems - not removing
Errors were encountered while processing:
 firefox