Thank you for reporting this to Ubuntu. We added the recommends on the firefox language pack to pull in that language pack on upgrades since it's now built by the firefox source. However, our testing apparently didn't discover this issue that Firefox itself gets pulled in on upgrade on systems that don't have it. This would affect servers and derivatives like Kubuntu. We apologize for this inconvenience and will fix this as soon as possible.
Thank you for reporting this to Ubuntu. We added the recommends on the firefox language pack to pull in that language pack on upgrades since it's now built by the firefox source. However, our testing apparently didn't discover this issue that Firefox itself gets pulled in on upgrade on systems that don't have it. This would affect servers and derivatives like Kubuntu. We apologize for this inconvenience and will fix this as soon as possible.