I guess nobody else has this bug, oddly enough, and if it ever gets fixed, it will be by accident. Attached a screenshot.
** Attachment added: "Firefox at startup with a menu open." https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1689653/+attachment/4924400/+files/Screenshot%20from%202017-07-31%2009-42-12.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1689653 Title: Firefox Menu Bar missing when starting up at fvwm login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1689653/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs