This is because you've got a third party package installing something in to /usr/lib/firefox/extensions, which is preventing our package from making that a symlink to /usr/lib/firefox-addons/extensions, where all the language packs are installed.
** Changed in: firefox (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/971525 Title: Please remove esteid-browser-plugin from the archive urgently, as it trashes our Firefox package (was firefox-locale-fi: User Interface completely in English) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/esteid-browser-plugin/+bug/971525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs