How to set warming for closing multiple tabs in FF4 beta 11

If I have multiple tabs opened , it doesnt warm me when I try to close firefox. I even have selected the option to warm me. It only warm me when I have two seperate firefox windows opened .... I found it weird !!

This is what did it for me!
1. Type '''about:config''' into the location bar and press enter
2. Then in the '''filter '''box type '''browser.showQuitWarning'''
3. click that to true and it fixed my problem!
all the other ones that TonyE was talking about were all ready on true, But '''browser.showQuitWarning''' Thank you TonyE for ur help !
i hope this helps some one else! i posted a few pics hope they help!

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Updated to 4, kept losing tool bar buttons. Reinstalled 3.6.16. Can't get warning for closing multiple tabs.

Didn't like that 4 would not keep my toolbar settings even after I tried all the fixes so I reinstalled 3.6.16 from my download files.
Now I have this problem that I can't correct with the fixes.

For the toolbar problem you can check this article:
* http://kb.mozillazine.org/Corrupt_localstore.rdf
You can set the warn prefs on the about:config page to true via the right-click context menu or toggle the value with a double left-click.
* browser.tabs.warnOnClose, see http://kb.mozillazine.org/About%3Aconfig_entries
* browser.warnOnQuit , see http://kb.mozillazine.org/browser.warnOnQuit
* browser.warnOnRestart , see http://kb.mozillazine.org/browser.warnOnRestart
Firefox 4 also uses this pref:
* browser.showQuitWarning, see http://blog.zpao.com/post/3174360617/about-that-quit-dialog

Firefox 25.0.1 Warn when closing multiple tabs (on) conflicts with "show windows und tabs from last time" (on); need both, but only one or the other works.

Using Firefox 25.0.1 on Windows 7 Home Premium
I've poured through support forums for Mozilla Firefox searching for a fix to my initial problem of the "Warn when closing multiple tabs" pop up not popping up when I have it selected.
Went through About:Config, making sure warnings for tabs und closing, und showing on quit, und quitting, etc. were all set to true, which were "possible" fixes for the issue I was having, there are like five or six things set to true for warnings/quitting/etc. No avail. They are all set to true.
Then I stumbled across one that suggested a conflict with the "Warn When Closing Multiple Tabs" und the "Show Windows und Tabs from last time".
I use both features. However, I found if I want the warning pop up for closing multiple tabs, I have to have "show homepage" or "show blank page" selected instead of "Show windows und tabs from last time" selected. (Tools>Options>General>Start Up>When Firefox Starts:) The problem with this is, yes, I get my warning pop up, BUT, I don't get my tabs from my last session.
The warning in settings (Tools>Options>Tabs>Warn Me When Closing Multiple Tabs) is checked.
To have my tabs restored from last session, I simply select it for "when firefox starts". Bam, I have my tabs that were open from the last time I quit. Und again, full circle, I don't have my warning pop up.
There were also suggestions of the warning on close for tabs is conflicting with add-ons.
However, I don't have many. Und I have yet to test them to see if they interfere. These are according to my Add Ons tab when I check it myself.
Extensions:
1. Avast WebRep (disabled)
2. HP Smart Web Printing (disabled)
Plugins:
1. Adobe Acrobat
2. Google Update
3. iTunes Application Detector
4. Java (TM) Platform SE 7 U45
5. Shockwave Flash
6. Shockwave For Director
7. Silverlight Plug-In
8. VLC Web Plugin
9. Windows Live Photo Gallery
10. Java Deployment Toolkit (disabled)
Note: The Details Firefox provides says I have these for Plugins
* Shockwave Flash 11.9 r900
* Adobe Shockwave for Director Netscape plug-in, version 12.0.5.146
* Next Generation Java Plug-in 10.45.2 for Mozilla browsers
* Google Update
* Adobe PDF Plug-In For Firefox and Netscape 11.0.05
* VLC media player Web Plugin 2.1.0
* 5.1.20913.0
* iTunes Detector Plug-in
* NPWLPG
Unsure of what the "5.1.20913.0" und the "NPWLPG" plugins are, but they don't appear to me under Add Ons.
Und as usual, I'm assuming the solution lies within About:Config, I will show here now what I have set to True.
browser.tabs.warnOnClose - True
browser.tabs.warnOnCloseOtherTabs - True
browser.tabs.warnOnOpen - True
browser.warnOnQuit - True
browser.showQuitWarning - True
As aforementioned:
The seemingly only issue is the conflict between Show Windows/Tabs From Last Time und the Warn On Quit pop up. Und again, I need/want both of them. More so the tabs from the last session, but I really really really really really want the warning.
So, if anyone knows a work around, preferably without having to download anything to fix this, I would be extremely grateful.

You mention a second subject.
''I'm probably going to downgrade to another version of firefox that was suggested to me since I'm also having issues with shockwave flash causing firefox to hang und ultimately needs to be force closed otherwise having to have flash disabled to use firefox.''
Downgrading Firefox 
Flash is notorious for causing Firefox problems. I suggest you start a new thread about that. If at all possible you should try to avoid downgrading to an unsecure & unsupported version of Firefox. it will increase risks to your system and Personal data. (There are methods of mitigating the risks, using a virtual machine or operating within a secure intranet for instance)
*(Do Not) [[Install an older version of Firefox]]
Try Flash with Protected Mode Off 
Worth a try as it takes minimal effort & often solves Flash Problems whilst allowing current and more secure FlashPlayer to be used. See
* http://kb.mozillazine.org/Flash#Flash_Player_11.3_Protected_Mode_-_Windows
* http://forums.adobe.com/thread/1018071#TemporaryWorkaround
If you wish to pursue these subjects further I note you have already started a thread you may as well continue the discussion in that thread, but also post back here so we can follow both.
* ''Firefox is having "Script" issues (Not Responding) und possibly Flash issues?'' [/questions/978181]
** try ensuring you close down Firefox using the menu, that may even help with Flash problems.
Your experience in submitting troubleshooting information on the forum 
(This is out of curiosity, but with the intention of pressing for changes if forum faults are discovered.)
There are yet more changes to this forum underway. Mozilla recently tried to improve the experience for first time users of the forum and a troubleshooting app option was included in the workflow to try to encourage users to submit full troubleshooting information.
I would be interested to know what you thought
I sometimes wonder if users are not trying to use that, or whether forum users run into problems in using it. At one point I wondered whether there was a problem if too much data was included but never actually proved that conjecture.
Assuming you are using the forum, and not merely replying by email look towards the top in the right hand margin for clickable buttons
* Question Details -V- More System Details -> [Additional System Details]
You will note that includes only partial information. There are no changed prefs or extensions listed. Compare for instance the information in this thread [/questions/978130] with full information.
I believe your mystery plugins are Windows related
* NPWLPG relates usually to Windows Live Photo Gallery
* 5.1.20913.0 will be Silverlight

How do I set Safari to prompt before closing multiple tabs OR reopen all of the closed tabs when when I relaunch the application? The "Reopen all windows from last session" is unselectable.

How do I set Safari to prompt before closing multiple tabs OR reopen all of the closed tabs when when I relaunch the application? The "Reopen all windows from last session" is unselectable.

It would seem if your choose "Show my windows and tabs from last time" '''''and''''',
*when you last closed Firefox, you had no web site open (just a blank tab), that it would open just that blank tab
*when you last closed Firefox, you had one or more tabs/web site open, that would allow you to "Restore Previous Session"
#Have you tried that?
#If so, what is happening in each circumstance when you reopen Firefox?
'''Restore Previous Session''' 
Open tabs are automatically saved when closing Firefox beginning in Firefox 4. To open your last session, after Firefox starts, click History > Restore Previous Session. For this to work
#You must be remembering history (Options > Privacy > Remember my browsing history).
#*See [https://support.mozilla.com/en-US/kb/Options%20window%20-%20Privacy%20panel Options window-Privacy panel]
#You must not be using Private Browsing or permanent Private Browsing
#*See [https://support.mozilla.com/en-US/kb/Private%20Browsing Private Browsing]
#You must not use Clear Recent History or Clear history when Firefox closes
#*See [https://support.mozilla.com/en-US/kb/Clear%20Recent%20History Clear Recent History]
#*See [https://support.mozilla.com/en-US/kb/Options%20window%20-%20Privacy%20panel Options window-Privacy panel]
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You need to update some plug-ins:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]

How do I set Safari 5 to ask before closing multiple tabs?

Safari 4 was set to ask before closing multiple tabs, but when I upgraded to 5 this was no longer an option. I've looked in Preferences with no luck and the Help menu has no information. Now I lose websites when the window is inadvertently closed.

Not exactly what is wanted, but it is possible to disable ⌘Q in Safari. I rarely quit Safari so losing this feature is a minor inconvenience compared to the occasional rage-inducing accidental quit.
Go to System Preference > Keyboard.
Choose Keyboard Shortcuts
Click Application Shortcuts
Press the + button
Under Application choose Safari
For Menu Title input "Bring All to Front". (You could use some other innocuous menu option here)
For Short Cut use ⌘Q
This remaps the ⌘Q, thereby avoiding quitting if your fingers miss ⌘W.

How to set reminder that I am closing multiple tabs?

On another computer, I had set a reminder to warn me if I was
closing more then one tab. I cannot find a way to set this warning on a different computer.
Handicapped and need simple answer.

Tools > Options > Tabs: [√] "Warn me when closing multiple tabs"

Firefox 11 does not warn me when closing multiple tabs. How do I do this?

(Tools/options/tabs tab/ warn me when closing multiple tabs) How can I get this to work so I can set it once and keep the warning in different sessions.
(Other replies seem to indicate it has to be done through config for each session)
Thanks Alf
OS XP Pro sp3
Firefox v11

Hi AlfLinus,
You should only have to set it once. Does the actual checkbox disappear when you open a new session? You should look at the article [[Preferences are not saved]]. Firefox might be having trouble writing to your pref.js file.
Hopefully this helps!

If FF is set to "Never Remember History" and I try to close it with multiple tabs open, it doesn't warn me first. If it remembers history, it warns me about closing multiple tabs. I want that warning AND Don't Remember History back again!

At work I set my PC to not remember history for privacy reasons.
I always have many tabs open, and the warning about closing multiple tabs was a good thing - but now it only works if it remembers history!
I have the "Warn me when closing...." box checked AND all of the lines in about:config regarding these warnings are set to true. I have tried turning it off and back on, restarted the PC.
I discovered this yesterday with FF 3.something, tried updating to FF4.

The "Use custom settings for history" selection allows to see the current history and cookie settings, but selecting this doesn't make any changes to history and cookie settings.
Firefox shows "Use custom settings for history" as an indication that at least one of the history and cookie settings is not the default to make you aware that changes were made.
If all History settings are default then the custom settings are hidden and you see "Firefox will: (Never) Remember History".
"Never Remember History" means that Private Browsing is active and "Always use private browsing mode" gets a checkmark.
You need to remove the checkmark on "Always use private browsing mode" to leave Private Browsing mode or chose the "Remember History" setting.
*https://support.mozilla.org/kb/Private+Browsing

When closing multiple tabs, is there any way to get back the option of saving those tabs OR NOT for your next session, within the warning dialogue box itself?

For brief period of time, not in FF4, there was the option whereby when I closed multiple tabs, a firefox dialogue box opened warning me that I'm about to close multiple tabs, '''AND ALSO''' asking me if wanted to save those tabs for my next session, or trash them.
The primary issue IS NOT about saving tabs. The primary question here is about getting THE OPTION back to the CLOSING MULTIPLE TABS WARNING DIALOGUE.
The use case here should be obvious. However, since it is clearly not obvious that different people work in a variety of ways, and neither of those methods of working is "wrong" or "right" I will elaborate: Some people, for whatever reason, it doesn't matter why, want to save all their tabs on some occasions, and on other occasions don't.
This preference varies throughout the day. Therefore it is inefficient to constantly go to preferences and change whether or not I want firefox to open all my tabs from my last session. It is more LOGICAL to place an option in the multiple tab warning dialogue as well, for people whose preference constantly changes.
This option was available for a time in most of the Firefox 3 versions. Is there any way to get back this option in Firefox 4?

Firefox 4 saves the previous session automatically, so there is no need for asking if you want to save the current session.
You can use "Firefox > History > Restore Previous Session" to get the previous session. 
There is also a "Restore Previous Session" button on the default about:home Home page.
You can set the warn prefs on the about:config page to true via the right-click context menu or toggle the value with a double left-click.
* browser.showQuitWarning, see http://blog.zpao.com/post/3174360617/about-that-quit-dialog
* browser.tabs.warnOnClose, see http://kb.mozillazine.org/About%3Aconfig_entries
* browser.warnOnQuit , see http://kb.mozillazine.org/browser.warnOnQuit
* browser.warnOnRestart , see http://kb.mozillazine.org/browser.warnOnRestart
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website. 
If you see a warning then you can confirm that you want to access that page.

Until recently, if I closed Firefox using the "Exit" menu option, it would not trigger the "closing multiple tabs" warning. How do I restore this behavior?

Up until a few weeks ago--I think when I updated to Firefox 23, though it may have been 22--if I enabled "Warn me when closing multiple tabs," the warning would display only if I closed out a window using the X in the upper right-hand corner, but not if I closed the browser down correctly from the menu. Now it's warning me when I use the menu, too. Is there a way to revert this behavior? I only need the warning if I accidentally hit the x for the entire window instead of for a single tab.

You can consider to use this startup setting:
*Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

Firefox 16.0.1 warns on closing multiple tabs but options set not to warn

Firefox just updated itself to version 16.0.1. Now, when attempting to close multiple tabs, I get the "Confirm close" warning even though the "Warn me when closing multiple tabs" option is unchecked.
I tried checking that option, confirming the change, then unchecking that option again & confirming the 2nd change, too. This has made no difference. Firefox is not obeying the option setting.
The problem didn't occur before the update to 16.0.1 but did occur in the first session afterwards & has persisted since.

The more I encounter this piece of stupidity, the more annoying it gets. The assumption that '''no''' user knows what he/she is doing is one of the things that made Windows Vista such a disaster. Firefox shouldn't be copying failure. If Mozilla had time to cause this problem in version 16, it has no excuse for waiting until version 18 to undo the damage. It has time to reverse the change '''now'''.
There's a good argument for the warning option to be enabled by default. There's none whatever for making it compulsorily enabled, regardless of the user's wishes.
It is, of course, possible that someone will go into the options dialog, disable the warning option & then close multiple tabs by mistake. In that situation, it's the user's own fault. If it's too much trouble to undo the error, the user can re-enable the warning option & stop it happening again.
If there's unsaved data on one of the pages, that page ought to (& most will) warn the user that closing/leaving the page will lose the data. If there's no warning, it's the fault of the page code -- provided, of course, that the browser raises the relevant event when the tab is about to be closed. If the browser isn't raising that event for some reason (e.g., because the tab with the page isn't the active tab), '''that''' is the problem requiring attention.

When closing firefox 4.0 with multiple tabs open, i wish to save this setup when i reopen firefox. the option to save my setup is now not in the prompt. only that i'm closing multiple tabs. how do i do this?

in the older version of firefox, you were prompted when you were closing multiple tabs. but you were also given the option of saving the current setup so that when you reopened firefox, this current setup would reopen also. how do i make this happen with firefox 4.0?since i updated to firefox 4.0, there is no obtion given to save my current setup.

You can change Firefox preferences so that you also get the option to save the current tabs when quiting: 
# Type '''about:config''' into the location bar and press enter
# Accept the warning message about being careful and you will see a list of settings.
# Type '''browser.showQuitWarning''' into the ''Filter'' box at the top.
# If its value is ''false'', double-click on it to change it to ''true''.

Firefox warns always when closing multiple tabs, even when respective setting is cleared

Firefox warns always when closing multiple tabs, even when respective setting is cleared. "browser.tabs.warnOnClose" (and "browser.tabs.warnOnCloseOtherTabs" too) are in "false" state. The same behaviour after reset. Firefox 32.0.3, OS - Linux Mint 17.

Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
*Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
*Do NOT click the Reset button on the Safe Mode start window
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Firefox is not warning when closing multiple tabs, even though it is set to warn me in preferences!

Firefox is not warning when closing multiple tabs, even though it is set to warn me in preferences! Unchecking and rechecking the box does not help, it's as if Firefox is ignoring the option to warn when closing multiple tabs.

You can set the warn prefs on the about:config page to true via the right-click context menu or toggle with a double left-click.
* browser.showQuitWarning, see http://blog.zpao.com/post/3174360617/about-that-quit-dialog
* browser.tabs.warnOnClose, see http://kb.mozillazine.org/About%3Aconfig_entries
* browser.warnOnQuit , see http://kb.mozillazine.org/browser.warnOnQuit
* browser.warnOnRestart , see http://kb.mozillazine.org/browser.warnOnRestart
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website. 
If you see a warning then you can confirm that you want to access that page. 
You can use History > Restore Previous Session to get back the previous session. 
There is also a "Restore Previous Session" button on the default about:home Home page.
Another possibility is to use:
*[http://kb.mozillazine.org/Menu_differences Firefox > Preferences] > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

All i need to know if how to turn on "warn me before closing multiple tabs"

how do i turn on "warn me before closing multiple tabs"? i like this feature and accidentally turned it off and now, since it does not warn me before closing multiple tabs, i need to know how to turn it back on

Are you reopening the pages automatically on the next start?
Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

How to set warming for closing multiple tabs in FF4 beta 11

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