(resending since the mailing list rejected the message due to an .eml attachment). Hi, I've just installed TB 58 beta2 and find myself without Lightning. Is there a way to reactivate the distribution extension or do I have to install it from: https://archive.mozilla.org/pub/calendar/lightning/candidates/6.0b2-candidates/build1/win32/ Users ask the same thing, they have trouble finding the right extension for their beta installs, for example: https://bugzilla.mozilla.org/show_bug.cgi?id=1423521 I've asked here before, but didn't get any reply whatsoever: http://lists.thunderbird.net/pipermail/maildev_lists.thunderbird.net/2017-September/000227.html Jörg.