Comment 4 for bug 1659988

My test was wrong (had another instance open with profile disabled)

The patch still does not fix the problem with white/black tabs, not rendering any content.

In syslog, I get:

Jan 28 02:13:58 lat61 dbus[3005]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/gtk/vfs/mounttracker" interface="org.gtk.vfs.MountTracker" member="ListMountableInfo" mask="send" name=":1.8" pid=19943 label="/usr/lib/firefox/firefox{,*[^s][^h]}" peer_pid=3101 peer_label="unconfined"
Jan 28 02:13:58 lat61 kernel: [10694.093307] audit: type=1400 audit(1485566038.221:44093): apparmor="DENIED" operation="open" profile="/usr/lib/firefox/firefox{,*[^s][^h]}" name="/proc/19943/net/arp" pid=19952 comm=4C696E6B204D6F6E69746F72 requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Jan 28 02:13:59 lat61 dbus[3005]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/gtk/vfs/mounttracker" interface="org.gtk.vfs.MountTracker" member="ListMountableInfo" mask="send" name=":1.8" pid=19985 label="/usr/lib/firefox/firefox{,*[^s][^h]}" peer_pid=3101 peer_label="unconfined"
Jan 28 02:14:32 lat61 dbus[3005]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/gtk/vfs/mounttracker" interface="org.gtk.vfs.MountTracker" member="ListMountableInfo" mask="send" name=":1.8" pid=20044 label="/usr/lib/firefox/firefox{,*[^s][^h]}" peer_pid=3101 peer_label="unconfined"
Jan 28 02:14:33 lat61 kernel: [10729.374780] audit: type=1400 audit(1485566073.502:44094): apparmor="DENIED" operation="mknod" profile="/usr/lib/firefox/firefox{,*[^s][^h]}" name="/dev/shm/org.chromium.35D9xE" pid=20044 comm=57656220436F6E74656E74 requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000