If you use Mozilla Firefox web browser, you might have noticed that if you open more than one tab and click on Close button, the browser shows a warning message box telling you that you are going to close multiple tabs and asks for your confirmation as shown in following screenshot:

If you look carefully, the message box also contains a checkbox "Warn me when I attempt to close multiple tabs". If you accidentally or intentionally disabled the checkbox and clicked on Close tabs button, the browser will not show the warning message next time you try to close multiple tabs and will immediately close the window.
Now the question comes how to restore the warning message and confirmation prompt so that you don't lose your running tabs if you accidentally click on Close button in future?
Here comes the solution! Firefox provides a simple option in its Preferences window to restore this confirmation prompt. You can use following easy steps to restore the warning message in Mozilla Firefox:
1. Click on orange Firefox button and select Options. Alternatively, you can press ALT key to temporary show menubar and then select Tools -> Options.
2. It'll open Firefox Options window. Now go to "Tabs" tab and enable "Warn me when closing multiple tabs" option:

3. That's it. Click on OK button and it'll restore the warning message and confirmation prompt in Firefox.
Simple. Isn't it? Did you also face this problem in past? How did you manage to restore the message box? Please share your experience in your comment...
This article was posted by VG in following section: Mozilla Firefox.
If you enjoyed this article, subscribe to our RSS feed or free newsletter to get all new articles directly in your Inbox. Also check out our popular articles and archive to read other interesting articles.
KTown
When I disabled this, I never remembered how to get to get it back. Thanks VG.
VG
^^ You are welcome. :)
John
it's good to have the warning on because i always forget if i close a tab or whole program
Yog
I have checked the box *warn me when closing multiple tabs* but still it doesn't warn. May be of because i use private mode.