If you’ve opened too many windows of Firefox where each window having too many tabs,  its tedious to close each Firefox window where you can get prompt to “confirm close” dialog when you set Firefox to warn when attempt made to close multiple tabs,  so you need to go through 4 dialog boxes like these and 4 clicks on “close tabs” button to close four windows (for e.g). Let us see how we can close them quickly.

confirm window close dialog

Closing Opened Firefox Windows And Tabs At Once Using Exit Button

All you need to do is select Exit  from Firefox menu to close all of them.

Firefox exit button

Though this is simple, how may people will remember and use the Exit button when they need to close any browser’s windows and tabs.