how to disable firefox close multiple tabs confirm dialog box

2/22/2013

The Problem

In Firefox when attemping to close multiple open tabs Firefox pops open an annoying dialog box prompting you to answer... "You are about to close 2 tabs. Are you sure you want to continue?"

The Solution

Type about:config into Firfox's address bar and click enter.
On your keyboard click Control-F to bring up the search bar.
Search for browser.tabs.warnOnCloseOtherTabs
Double click it to change its value to False

Done! For now on Firefox will not prompt you when closing multiple tabs.

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