Comment 33 for bug 451375

starlights, that is a different bug, but it is known and pending merge review by the mozilla team. In the meantime, add to your firefox profile:
    /usr/lib/openoffice/program/soffice Uxr,

and reload it with 'sudo apparmor_parser -r -T -W /etc/apparmor.d/usr.bin.firefox-3.5'