Comment 11 for bug 1020198

If this bug is specific to Unity, it might not be the same bug as https://bugzil.la/779900 and https://support.mozilla.org/en-US/questions/932643, which is confirmed to affect a Kubuntu user (me) and a Xubuntu user. Also, my brother (who uses Unity) has a bug that's just like this, only his menus come back when he right-clicks his tabs. See if that works on this one.