Nice addon Rated 5 out of 5 stars

Works well ! hope it can also hide the titlebar alltogether since its blank and useless without the app button. like this:
#titlebar { display: none !important; }#toolbar-menubar, #navigator-toolbox[tabsontop="false"] #nav-bar, #navigator-toolbox[tabsontop="true"] #TabsToolbar { padding-top: 12px !important; padding-right: 105px !important; }

This review is for a previous version of the add-on (1.1).