Package: thunderbird Version: 1:60.0-3~deb9u1 Followup-For: Bug #908494 Dear Maintainer,
I had the same issue on stretch: After upgrading thunderbird from 52 to 60 lightning vanished. I tested using a new, empty thunderbird profile: Lightning was back there. Then I switched back to my default profile, deactivated any add-on the DE language pack and restarted thunderbird: Lightning was back there. Then activated all add-ons and the DE lang pack step by step, restarting the applilcation after each step. Lightning was still there. I use the following debian packages: thunderbird 1:60.0-3~deb9u1 thunderbird-l10n-de 1:60.0-3~deb9u1 lightning 1:60.0-3~deb9u1 and the following add-ons from addons.mozilla.org Enigmail Provider for Google Calendar Mail Redirect DKIM Verifier *** Reporter, please consider answering these questions, where appropriate *** * What led up to the situation? * What exactly did you do (or not do) that was effective (or ineffective)? * What was the outcome of this action? * What outcome did you expect instead? *** End of the template - remove these template lines *** -- System Information: Debian Release: 9.5 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-8-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages thunderbird depends on: ii debianutils 4.8.1.1 ii fontconfig 2.11.0-6.7+b1 ii libatk1.0-0 2.22.0-1 ii libc6 2.24-11+deb9u3 ii libcairo-gobject2 1.14.8-1 ii libcairo2 1.14.8-1 ii libdbus-1-3 1.10.26-0+deb9u1 ii libdbus-glib-1-2 0.108-2 ii libevent-2.0-5 2.0.21-stable-3 ii libffi6 3.2.1-6 ii libfontconfig1 2.11.0-6.7+b1 ii libfreetype6 2.6.3-3.2 ii libgcc1 1:6.3.0-18+deb9u1 ii libgdk-pixbuf2.0-0 2.36.5-2+deb9u2 ii libglib2.0-0 2.50.3-2 ii libgtk-3-0 3.22.11-1 ii libgtk2.0-0 2.24.31-2 ii libjsoncpp1 1.7.4-3 ii libpango-1.0-0 1.40.5-1 ii libpangocairo-1.0-0 1.40.5-1 ii libpangoft2-1.0-0 1.40.5-1 ii libstartup-notification0 0.12-4+b2 ii libstdc++6 6.3.0-18+deb9u1 ii libvpx4 1.6.1-3+deb9u1 ii libx11-6 2:1.6.4-3 ii libx11-xcb1 2:1.6.4-3 ii libxcb-shm0 1.12-1 ii libxcb1 1.12-1 ii libxext6 2:1.3.3-1+b2 ii libxrender1 1:0.9.10-1 ii libxt6 1:1.1.5-1 ii psmisc 22.21-2.1+b2 ii x11-utils 7.7+3+b1 ii zlib1g 1:1.2.8.dfsg-5 Versions of packages thunderbird recommends: ii hunspell-de-at [hunspell-dictionary] 20161207-1 ii hunspell-de-ch [hunspell-dictionary] 20161207-1 ii hunspell-de-de [hunspell-dictionary] 20161207-1 ii hunspell-en-us [hunspell-dictionary] 20070829-7 ii lightning 1:60.0-3~deb9u1 Versions of packages thunderbird suggests: pn apparmor <none> pn fonts-lyx <none> ii libgssapi-krb5-2 1.15-1+deb9u1 -- no debconf information