That's by design. It only shows if you hide the menubar (it makes no sense to show the button when there is a menubar too). However, if you're in Unity then you can't hide the menubar
** 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/776334 Title: bookmarks (expandable) icon does not show up in navigation toolbar -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs