Discuss if Thunderbird AppArmor profile should prevent users from opening attachments

We need to document this or fix it in Debian.

First step: research what’s in the log and if it can be fixed.
Second step: Document it or upstream the fix to Debian.

Feature Branch: icedove:tails/stretch

Original created by @u on 11964 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information