In my system /usr/lib/thunderbird/extensions
is indeed a real directory and not a symlink; it is also empty. I suppose that some addon packages may have left it during the update. The only addons I ever installed are xul-ext-calendar-timezones xul-ext-gdata-provider xul-ext-lightning And, for the sake of completeness... $ dpkg -S /usr/lib/thunderbird/extensions/ thunderbird: /usr/lib/thunderbird/extensions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1228906 Title: Lightning not available even though xul-ext-lightning is installed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1228906/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs