o No Lightning (icon, menu) after upgrade to 60.0-3~deb9u1 despite the add-on being loaded o No Lightning in a newly created profile o apt purge thunderbird-l10n-de -> removes icedove-l10n-de* thunderbird-l10n-de* o Lightning is back (and Thunderbird obviously now in English)
reversal test: o apt install thunderbird-l10n-de -> installs thunderbird-l10n-de o Lightning is gone (=no icon, no menu) again
