In Ubuntu 18.x, the global app menu could be disabled with this command:
gsettings set org.gnome.settings-daemon.plugins.xsettings overrides '@a{sv} {"Gtk/ShellShowsAppMenu":<0>}'
Or, using gnome-tweaks, I would turn it off by clicking on Top Bar -> Application Menu.
However, neither of these seems to work anymore in Ubuntu 19.04. What is the new correct way to disable the global app menu?
Edit:
Note that I cannot use the hamburger menu as not every application has one of those. For example, on my desktop I have Terminator and KDevelop running, neither of which have a hamburger menu. The global menu at the top of the screen (not attached to the window) has options specific to those applications:
How would I disable this global menu and bring whatever menu options are provided down to the application's window instead?
Best Answer
I started using the Hide App Icon extension. It works perfectly and you can choose to hide the app icon, the window title, and the dropdown arrow independently.