I can confirm this bug. It helped, adding the following line to section [ExtensionDirs] to extensions.ini in my profile directory: /usr/lib/thunderbird-addons/extensions/
After that, the new lightning extension got recognized and the extensions.ini. I guess, xul-ext-lightning should use /usr/lib/thunderbird/extensions/ instead of /usr/lib/thunderbird-addons/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