How to remove the upper bar of applications

Question

How do I remove the top bar of applications (title-bar), The one bar that usually displays minimize, maximize and close? See attached screenshot:

Answer 1

For Chrome/Chromium go to Settings -> Appearance and turn off the 'Use system title bar and borders' option:

For Firefox go to ☰ -> Customize and turn off the 'Title bar' option in lower left corner:

Also for all applications you can use GNOME extension called Pixel saver. It removes title bar only from maximized windows but you will have access to maximize/minimize buttons in GNOME panel.