One of the changes in Firefox 4: by default Firefox 4 does not display the "Save Tabs and Exit" warning message when closing multiple tabs, but it can be turned back on by changing some preferences.

• Saving tabs was not removed from Firefox 4, but it works a bit differently.
  • By default, Firefox 4 will not ask to save tabs, but instead it will always save your tabs on exit. You can restore them next time by choosing "Restore Previous Session" from the History menu, or pressing the restore button on Firefox's default home page.
  • Note: This was a decision by the developers. On this forum, we are all uncompensated volunteers here to help other users. The developes/employees of Mozilla/Firefox rarely, if ever visit here.

To display the "Save Tabs and Exit" message when closing multiple tabs, you can do the following:

1. Type about:config in the URL/Location/Address bar and press the Enter key
2. Accept the warning message (promise to be careful)
3. The preferences page/list will open
4. Filter = browser.tabs.warnOnClose
5. If its value is set to false, double-click on it (in the lower panel) to toggle its value to true
6. Repeat steps 4 and 5 for these following 3 preferences also:
   • browser.warnOnQuit
   • browser.warnOnRestart
   • browser.showQuitWarning
     • Note: last pref is new in Firefox 4b12, may need to add (boolean)
     • Info/Instruction for using about:config: http://kb.mozillazine.org/About:config
7. See:
   • https://support.mozilla.com/en-US/questions/785169
   • http://forums.mozillazine.org/viewtopic.php?f=23&t=2105039&p=10434467&sid=fd2a35945bb2c633687f7b50d8c53989
   • http://blog.zpao.com/post/3174360617/about-that-quit-dialog

Thank you very much Helper7677 it solved the problem

Ahmedn1

So that other users can find answers that have worked, please take a couple of minutes to return to the forum, sign in and click "Solved" next to my answer. Thanks.

'THIS WORKS !!!' I am a doctor.But here is my help:

On the Mozilla home page http://www.mozilla.org/ type this:about:config And enter despite a warning box"I`ll be careful,I promise":-) Just tick it & enter.

Change the column: "browser startup page" -userset integer- from 3 to 4 by double-clicking on that link & changing 3 to 4 !

browser.startup.page;4

This idea I got from this link below.

http://www.mydigitallife.info/firefox-3-doesnt-prompt-or-warn-to-confirm-when-closing-multiple-tabs-as-warning-not-working/

Reply if it works by signing in;as others will be helped !

THIS WORKS !!!

short solution: type "about:config" in address bar. press enter to option i'll be careful i promise then type "browser.showquitwarning" in filter ....then in value change false to true.. then exit,