Web Browsers

Firefox Tip: Restore the warning while closing multiple tabs


Mozilla Firefox has a really nice feature enabled by default. Firefox warns you when you press the close button while you have multiple tabs open. The feature is really useful against accidental presses on the close button. It is very useful to me personally as I have accidentally lost work in other browsers during several occasions.

For those who do not need such a feature, Firefox gives a checkbox at the confirmation (Exit and close tabs?) dialog – “Warn me when I attempt to close multiple tabs”. Now, if you use the feature and you have accidentally disabled it, then here’s how to get it back.

Open Firefox Settings: Click on the hamburger button (

Under the Tabs heading, check the box before “Warn you when closing multiple tabs”.

That’s it! Your useful confirmation is back and will warn you when you try to close Firefox with multiple tabs open.


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  • I don’t have that line in my options/tabs heading?! the other four are the same, but that one is missing!!! now what?

      • Hi, I am on Firefox 68.0b13 and it is still working fine. It was working fine during all the 67 releases. So, it should be working fine for you as well. Do note that the option should only appear when you have already disabled the warning while closing multiple tabs.

        • 73, not present, and not working. Potentialy it causes loosing progress on some of websites that not store drafts.

            • It is working on Firefox version 75. You just have to go to the history settings & tell it to remember all history, then firefox will restart. After restarting firefox, go back to settings, at the top under “startup”, it will now give you the option to turn on the warning feature! But if you don’t want your browser to remember all your history, you can then turn it off after turning on the warning feature. Hope this helps! Good luck!

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