The bug is not exclusive to FireTray, I'm also having it with the "MinimizeToTray Revived" extension:
https://tn123.org/mintrayr/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/775080 Title: Thunderbird with Firetray - menu in Unity top bar disappears To manage notifications about this bug go to: https://bugs.launchpad.net/globalmenu-extension/+bug/775080/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs