Rated 5 out of 5 stars

Από τον/την Alex στις Ιαν. 12, 2013 · μόνιμος σύνδεσμος

Works for me. This addon seems to be the only way to make Firefox under Linux hide the titlebar (not using KDE). This is why I give it five stars even though it has a little flaw: if you open enough tabs, the last one gets overlapped with the minimize, maximize and close buttons.