Hi, I can confirm this misbehavior on my system, too:
Debian 9.2 Package: linux-image-amd64 4.13+86~bpo9+1 Package: thunderbird 52.4.0-1~deb9u1 ... I'm not able to neither open nor send attachments via thunderbird. Fwiw: The journal discloses information like this (when trying to open an image file): Dec 08 17:37:16 vandamme kernel: audit: type=1400 audit(1512751036.051:1869): apparmor="DENIED" operation="exec" profile="thunderbird" name="/usr/bin/gwenview" pid=30742 comm="thunderbird" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0 Regards, Gerhard
