However, the work-around given in bug #1004841 doesn't work anymore. The default theme in linux is not monochrome:
https://www.mozilla.org/media/img/l10n/en-US/thunderbird/landing /screenshot-linux.7af76cb37bda.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1604628 Title: Thunderbird Icon set is broken (ugly, black and white, monochrome icons/theme) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1604628/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs