Z 5 z 5 gwězdkow pógódnośony

wót Alex dnja Jan. 12, 2013 · trajny wótkaz

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.