Here you have plenty of reasons why the current state of the ubuntu firefox/thunderbird apparmor configuration is a security nightmare:
http://www.mozilla.org/security/known-vulnerabilities/firefox36.html#firefox3.6.7
Here you have plenty of reasons why the current state of the ubuntu firefox/thunderbird apparmor configuration is a security nightmare:
http:// www.mozilla. org/security/ known-vulnerabi lities/ firefox36. html#firefox3. 6.7