In Ubuntu, move the window menu from the top toolbar back to the form itself, and disable global menu)

In Ubuntu, the window menu is removed from the top toolbar to the form itself, and the global menu (global menu) Ubuntu does not know which version to start from, and the window menu is uniformly moved to the top of the screen, it is called a global menu. This method is really good for small displays, saving a lot of places, but for large displays, the window is not full screen too much, this method is not friendly to the window not full screen. Because the mouse needs to run far to go to the menu bar. 1. open the terminal: sudo apt-get autoremove appmenu-gtk appmenu-gtk3 after the appmenu-qt is completed, you just need to close all the programs and then re-open it to see the results of the market, but for firefox, you also need to disable "global menu bar integration" in "extended components"-"extended" to make it available again: if it is not suitable, you want to restore it back: enter sudo apt-get install appmenu-gtk appmenu-gtk3 appmenu-qt in the terminal and enable global menu bar integration in firefox extension components-extensions. Turn off all programs and open them again.