In addition to the comment above, here are the two most important lines taken from kern.log, which are the first and third lines output after trying to start a Java applet in my browser (Firefox 33). The other lines are all very similar.
Oct 15 15:57:45 fred-laptop kernel: [ 387.693155] type=1400 audit(1413403065.724:138): apparmor="DENIED" operation="open" profile="/usr/lib/firefox/firefox{,*[^s][^h]}//browser_openjdk" name="/run/user/1000/icedteaplugin-fred-im6jmr/3223-icedteanp-plugin-debug-to-appletviewer" pid=3269 comm="java" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 […] Oct 15 15:57:45 fred-laptop kernel: [ 387.726502] type=1400 audit(1413403065.756:140): apparmor="DENIED" operation="exec" profile="/usr/lib/firefox/firefox{,*[^s][^h]}//browser_openjdk" name="/usr/bin/logger" pid=3271 comm="java" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0 […] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1293439 Title: Apparmor prevents icedtea-7-plugin from creating necessary files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1293439/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs