This profile requires the GnuPG profile I sent some minutes ago.
It supports Enigmail with OpenPGP Smartcards.
This profile locks access to the local firefox folder. The advantage is,
in case of a security breach, the attacker cannot steal data from your
firefox profile. The disadvantage is, you cannot use emailto links from
within firefox with this profile.
If you want emailto links to work, change it yourself.
The /proc stuff could be confined better, was too lazy to make it a bit