Comment 8 for bug 923372

Indeed, both xul-ext-lightning and enigmail are rendered worthless (for thunderbird at least) by this update. Meanwhile, removing the packages and installing the extensions from addons.mozilla.org works fine (at least on this amd64 machine).

If stable updates are going to continue to cause these kinds of random (and *severe*) regressions in these packages, then nobody should be relying on them. I'd like to see them removed from the archive, especially since an (apparently *much* better supported) update mechanism already exists from addons.mozilla.org.