Same thing in Firefox as Chromium, this is an issue with the sanitized helper profile
Apr 26 14:29:18 sec-precise-i386 kernel: [ 6213.328525] type=1400 audit(1335468558.190:46): apparmor="DENIED" operation="exec" parent=20292 profile="/usr/lib/firefox/firefox{,*[^s][^h]}//sanitized_helper" name="/usr/share/software-center/piston_generic_helper.py" pid=20300 comm="software-center" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0 ** Package changed: software-center (Ubuntu) => apparmor (Ubuntu) ** Changed in: apparmor (Ubuntu) Importance: Undecided => Low ** Changed in: apparmor (Ubuntu) Status: New => Triaged ** Also affects: apparmor (Ubuntu Precise) Importance: Undecided Status: New ** Also affects: apparmor (Ubuntu Quantal) Importance: Low Status: Triaged ** Changed in: apparmor (Ubuntu Precise) Importance: Undecided => Low ** Changed in: apparmor (Ubuntu Precise) Status: New => Triaged ** Tags added: regression-release -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/972367 Title: software-center crashed with GError in run (): Failed to execute child process «/usr/share /software-center/piston_generic_helper.py» (Access Denied) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/972367/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs