The Quit option is available only when you're willing to clear some of your browsing data on exit. It's for instance cache, tabs, history etc. # Tap on the menu button, then Settings , followed by Privacy. # Put a check mark next to ''Always clear when quitting'' and select at least one type of data to clear. # The Quit option will show up in the menu. On Android 4 and higher, you can close Firefox or any other app from the app switch screen. * Ice Cream Sandwich: long press on the home button. * Jelly Bean: tap on the app switch button [[Image:app switch button 25px - Android Jelly Bean]].