This is exactly what is needed if you have gone for a title-bar-less Firefox setup like I have. I use Gnome in Linux with gnome extension that moves all app titlebars to panel at top of the screen, hiding titlebar in the app itself. Very handy to get the maximise button back in the app window itself -thanks! EDIT - what would be really useful is the ability to change the maximise (and other buttons) symbol to something else rather than the box/square symbol so you can get it to match your system theme - even if you were able to do this manually by copying in an image yourself to use as the symbol? Or is that already possible?

perfect for kde users that want a windows-like experience where the titlebar and border are hidden

Parfait pour Gnu/linux avec kde

It is very useful under KDE and other window managers systems. Obviously not in Windows or MacOS.

Great!

Great.

i like this is a great help, please go and make the icon look better for other wallpapers