While Ubuntu can of course keep the packages for thunderbird and lightning separate, please make sure to at least add "Recommends: xul-ext-lightning" to the thunderbird package as this is the expected configuration. (Or whatever makes it install lightning at the same time by default.)
Hey, Thunderbird maintainer here.
While Ubuntu can of course keep the packages for thunderbird and lightning separate, please make sure to at least add "Recommends: xul-ext-lightning" to the thunderbird package as this is the expected configuration. (Or whatever makes it install lightning at the same time by default.)