This looks very much like https://bugs.launchpad.net/bugs/1694129 which I raised a week ago.
-- 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/1692477 Title: Thunderbird 52.1.1 no longer able to see remotely mounted folders Status in thunderbird package in Ubuntu: Confirmed Bug description: Since the upgrade of Thunderbird to 52.1.1 remotely mounted folders no longer show up in the attach dialog window. - What is happening In nautilus mount a folder ("Connect to Server") from a remote server - smb:// or ssh:// are the two I have tried. Start a new email and go to attach a file from the remote folder. The shared folder is not visible in the attach file dialog but is visible in nautilus - What should happen In nautilus mount a folder ("Connect to Server") from a remote server - smb:// or ssh:// are the two I have tried. Start a new email and go to attach a file from the remote folder. I can see the remote folder from the attach file dialog. $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16.04 Codename: xenial $ apt-cache policy thunderbird thunderbird: Installed: 1:52.1.1+build1-0ubuntu0.16.04.1 Candidate: 1:52.1.1+build1-0ubuntu0.16.04.1 Version table: *** 1:52.1.1+build1-0ubuntu0.16.04.1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 100 /var/lib/dpkg/status 1:38.6.0+build1-0ubuntu1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1692477/+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
