Recently, I noted that Firefox started to behave differently when I double-click on its title-bar / tab-bar.
It maximizes the windows as if I clicked on the semaphore + button, instead of opening a new tab like it used to do before.
Anyone knows how to get the old behavior back?
Best Answer
Double-click to maximise is a System pref
menu > System Preferences > Dock
Uncheck "Double-click a window's title bar to…zoom"