apparmor mount rule help

[Lfekey]

I don't want firefox mount some sda partition.
I add "deny mount /dev/sda7" to /etc/apparmor.d/local/user.bin.firefox, but it doesn't work.
sda7 is a fat32 partition.

[Laiquendi]

1. Do you have your firefox profile enabled in apparmor?
2. Read here about editing apparmor profiles

http://ubuntuforums.org/showthread.php?t=1008906
Maybe you should just try denying the access?
then it would be

deny /whatever/the/place/is r,

[Lfekey]

Firefox profile is already enforced.
Dening the access is not a good choice, because you can mount a partition at any place.
I think mount rule is needed.