How to turn off warning about closing multiple tabs in Firefox?

Question

Browsers

The question is simple: how can I make it so that when I click "Close other tabs", the browser would not show the window "You are about to close several tabs (n), are you sure you want to do this?"
In Menu-Settings-Tabs, the checkbox for "Warn when closing multiple tabs" is unchecked.
Firefox 16.0.2

Answer 1

very simple
in about:config find
browser.tabs.warnOnClos
browser.warnOnQuit
browser.warnOnRestart
browser.showQuitWarning change true to false

Answer 2

Wait for the 18th version of FF, they will do this thing there:browser.tabs.warnOnCloseOtherTabs