Found the solution: about:config ui.use_unity_menubar=false
Who thought it was a good idea to enable it by default? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1663763 Title: Firefox menu bar cannot be enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1663763/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs