Hide title bar if window is maximized.
Please visit extension's page on addons.mozilla.org for install latest stable version. Also, it is good place for you positive reviews. For post bug reports and feature requests please use issues page. I read it more often. Code of unstable version is contained in next branch. Use it for testing only.
This extension only for GNOME 3! Please don't use it with another DE (XFCE, KDE, etc).
Don't use HTitle and Hide Caption Titlebar Plus in one time!
Maximized window without panel: