Thank you for your bug, that sounds like an upstream issue, maybe you could report it to https://bugzilla.mozilla.org/ ?
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1959604 Title: Thunderbird 91.5.0 regression: writes attachments to /tmp readable to everyone Status in thunderbird package in Ubuntu: New Bug description: thunderbird saves opened attachments to /tmp with permissions according to umask setting. This was fixed a long time ago with a protected folder /tmp/mozilla_${USER}0 and was still working correctly as of version 78.14.0+build1-0ubuntu0.20.04.2. The recent update to 1:91.5.0+build1-0ubuntu0.20.04.1 reintroduced the bug. Ubuntu 20.04.3 LTS Kernel release: 5.13.0-25-generic Architecture: x86_64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1959604/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp