Unfortunately, at this point (due to bug #451375) if you are using zotero you cannot use the apparmor firefox profile. To disable the profile, do:
$ sudo apparmor_parser -R /etc/apparmor.d/usr.bin.firefox-3.5 ; sudo ln -s /etc/apparmor.d/usr.bin.firefox-3.5 /etc/apparmor.d/disable/usr.bin.firefox-3.5
Unfortunately, at this point (due to bug #451375) if you are using zotero you cannot use the apparmor firefox profile. To disable the profile, do: d/usr.bin. firefox- 3.5 ; sudo ln -s /etc/apparmor. d/usr.bin. firefox- 3.5 /etc/apparmor. d/disable/ usr.bin. firefox- 3.5
$ sudo apparmor_parser -R /etc/apparmor.