When I close Firefox I cannot reopen it without restarting my computer.

If I try to re-open Firefox I get the message already open close or restart your computer.

Try to Wait a bit longer before reopening Firefox to give Firefox more time to close completely.
Use "Firefox/File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit") to close Firefox if you are currently doing that by clicking the close X on the title bar.
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
See "Firefox hangs when you quit it":
*https://support.mozilla.com/kb/Firefox+hangs

Similar Messages

When I close firefox I cannot launch again without restarting PC. I deinstalled and reinstalled without succes

Only since a few weeks, when I close Firefox and after a wile want to use it again I get the notice that there is still a version running. I do not find this version and so I cannot close it. The notice advises to restart the computer. then the Firefox starts again. I uninstalled Firefox en reinstalled but without any change.

Hello fredakis, go for a '''clean re-install''', This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from https://www.mozilla.org/firefox/all/ (full installer) and save the setup file to your computer.
#After the download finishes, close all Firefox windows (or open the Firefox menu [[Image:New Fx Menu]] and click the close button [[Image:Close 29]]).
#Delete the Firefox installation folder, which is located in one of these locations, by default in '''Windows:'''
* C:\Program Files\Mozilla Firefox
*C:\Program Files (x86)\Mozilla Firefox
Now, go ahead and reinstall Firefox:
#Double-click the downloaded installation file and go through the steps of the installation wizard.
#Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox|here]].
WARNING: Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device! See [[Back up and restore information in Firefox profiles]]. 
Please report back to say if this helped you!
Thank you.

When I close Firefox then wont reopen unless I go to task Manager and close program from there.

When I close Firefox it will not open another window when you click on icons or manually try to open new window. I have to open Task Manager find Firefox program and manually close program. Then when you open a new Firefox window it try's to restore previous session , saying sorry Firefox crashed. I have uninstalled and reinstalled , turned off all add-on's nothing has worked. No virus's , no other outside influences , nothing else on my computer has issues. Can you help?

See this: 
https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_hang-at-exit

Downloaded 6.0 firefox will not shutdown now without restarting my computer HELP PLEASE

when i try to shut down firefox now i get a window that says firefox is still running to shut it down restart your system. it started doing this the day after i downloaded 6.0. it was so annoying i uninstalled it and am using an old version i still had the set up for. but it say it is no longer protected from attack. please help !!!

Seeing this as well. Very, very frustrating. I have to kill the exe each time it does this. Was not happening prior to 6. I am now running 6.0.1 and the problem persists.

When i close Firefox, i can't reopen it without 1st doing to taskmaster and clicking endtask for it.

this happens most but not all of the time. I close Firefox and then cannot reopen it without going into taskmaster and highlighting Firefox and clicking "end task." Also related i think to this problem is that often when i am on a website using firefox as my web browser and there is a link to click on, nothing happens when i click on the link. I do not have this problem if i use Google Chrome for my web browser. I am running Windows 8 on a new computer but i had this problem develop in the past 2 months on my old computer before i switched to the new one.

*Make sure that Firefox closes properly and that there isn't a hanging Firefox or plugin-container process left in the Task Manager.
*Use "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: "Firefox > Quit Firefox"; Linux: "Firefox/File > Quit") to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.
See also:
*"Hang at exit": http://kb.mozillazine.org/Firefox_hangs
*"Firefox hangs when you quit it": https://support.mozilla.org/kb/Firefox+hangs
Are you using "Clear history when Firefox closes" to clear data like the cookies?
*Tools > Options > Privacy > Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" > Settings

My homepage will load about 30% and then i'm dead in the water. when i close firefox it appears to close but when i try to reopen it tells me that it's already running. started with beta 6 i deleated and loaded ver 5 no change

when i start firefox, everything starts normal then my homepage (igoogle) starts to load, gets to about 30% and stops. from there i can click on links or bookmark and a new tab will open but no page will load. i can't get anywhere. then when i close firefox it appears to close normally but when i try to reopen firefox i get a message that firefox is still running but not responding and the only way to shut it down is to reboot. when it first occured i was running beta 6 (since it became available, i also used beta 4 & beta 5) i then uninstalled beta 6 and downloaded and installed ver 5 same problem. i then did a system restore to a time before the problem.. no luck. i'm not sure what to try next. IE & chrome both work fine

I'm in exactly the same boat - dead at blue screen, only option is to salvage using target mode.
I don't currently have access to another Mac to do target mode. I was planning to buy a new Mac this fall anyway, though. 2 questions in preparation for that purchase:
1) Is there anything I can do before buying a new Mac to make the salvage process more successful? ie, should I spend the time and money going to the genius bar to have them help me get from totally crippled to partially crippled? (As for expertise, I'm a proficient consumer-grade user, but Apple Support walked me through the safe-boot process, etc.)
2) Is Apple going to provide 10.5 once it is released to people who buy a new Mac in these 6 weeks pre-release?
Thanks for your help,
Bailey

When I close firefox, it will not allow me reopen it unless I CTRL-ALT-DLT and force it to actually close, which at this point it is using up an average of 300,000k-450,000k. also, almost none of the links I click, open. i have to open it in a new tab.

when I close firefox, it will not allow me reopen it unless I CTRL-ALT-DLT and force it to actually close, which at this point it is using up an average of 300,000k-450,000k. also, almost none of the links I click, open. i have to right click and open in new tab.

Please check [[safe mode]], [[troubleshooting extensions and themes]].

With Firefox running, Office 2007 generates a "Cannot Empty Clipboard" error message when pasting information between Excel cells -- the behavior goes away when I close Firefox. Is there a way to prevent this?

I am running Windows XP, Office 2007, and Firefox 3.6.13.
Whenever I have Firefox running in the background and I attempt to paste information between Excel cells a "Cannot Empty Clipboard" error is generated. I have attempted numerous other fixes for this: Excel and Office settings. But nothing seems to help. When I close Firefox, the errors are no longer generated.

The Skype add-in was the culprit in my case. Disabling it fixed the problem. As soon as I enable it, the problem comes back.

I had some problems with my pc, since then when I close Firefox it won't reopen unless i go to Task manager and end the process for FF.

I had some problems with my pc, since then when I close Firefox it won't reopen unless i go to Task manager and end the process for FF. I have uninstalled FF and re-installed it and no change.
Walt

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

When i close firefox and reopen it, the previus web site reopens again

when i close firefox the web page i was visiting, and i reopen a new session the previous page i was visiting reopens again, i cleared cache, history no hel and reinstalled it no help [lease help me ty .

Use one of these:
*Tools > Options > General > Startup: "When Firefox Starts": "Show my home page" "Show a blank page"

When i close firefox and want to use it later i get a warning saying cannot open firefox close it first this keeps happening all the time any ideas to solve this problem? i have 2 mchines one on xp and one on windows 7

i have 2 pcs one with xp and the other with windows 7 heres the problem
when i close firefox and say go back to it say in 10 mins i get a error message saying to close firefox before opening!!! but firefox window is closed but the processes still say its running in task manager so to correct this i have to end process on firefox. this seems to be happening now every time in the last few days i have upgraded firefox to the latest version. any ideas on how to solve this problem.

see if this helps you : [https://support.mozilla.org/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding Firefox is already running but is not responding]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

When I close firefox I attempt to reopen, it wont load...looking in task manager shows it as a process, i need to, end the process to restart firefox, Why?

when I start firefox, then close it..and attempt to restart it, I get a message that its loaded....but its not...but I see it as a process in task manager.I end the process..then start firefox again...........constant problem...............windows 7 system...8gb ram g4bit

Hi Andis.
First of all, this is completely normal behavior, although it's a bit irritating, I know. What happens is that when you close Firefox, despite the window disappearing right there and then, Firefox keeps running for a little bit until the whole closing procedure is completed. This can take a fraction of a second on fast computers, or can take a few seconds on slow computers or when Firefox is storing a large session (if you save your tabs). All you have to do is wait a bit until Firefox closes, and then open it again.
To see if it's still running, you can press CTRL+SHIFT+ESC and then, under the Processes tab, you can see if firefox.exe is still there. If it's taking an unusual amount of time to close (which happens very rarely, and only if the browser freezes on exit), you can force the application to terminate from this application (task manager).
Firefox 4.0 will reduce by 97% the time it takes firefox.exe to close, so this problem will be basically erased for Firefox's next version.
Until then, I can recommend you this extension, which helps you restart your browser more easily and without bothering about closing times:
https://addons.mozilla.org/en-US/firefox/addon/3559/
Hopefully this will help.

Is there anyway to get an App Tab to stay when I close the program then reopen it?...they always disappear when I open a new window etc.

Is there anyway to get an App Tab to stay when I close the program then reopen it?...they always disappear when I open a new window etc.
And I thought the whole point of an App Tab was to always have those tabs there no matter what window is open all the time period.
It's a minor complaint but I would really appreciate the option to permanently have them there.

I thought that app tabs would be more persistent, like pinning programs to the taskbar in Windows, but this is not the case.
Instead, once you close a Firefox window, all its tabs and app tabs are lost.
Essentially, this means that the close button in the upper-left corner of a Firefox window is now a "kill all open tabs and loose all App Tabs without warning++ " button. That is not cool.
I realize that "Firefox > Quit Firefox" behaves as intended, but many people use the more obvious red close button instead of the menu to close windows on a Mac. And it is easy to forget that the red button is now also an app-tab-death button. I've lost my app tabs many times to this issue. It is an unforgiving user interface decision which hampers the usability of app tabs. Why should I go through the extra clicks of setting up app tabs if I can loose them so easily?
Ideally, App Tabs could be saved separately from the currently open windows (perhaps create an option to save then to a special Tab Group that opens on startup?). App tabs would be exceedingly useful to me if they weren't so easy to loose.
On that note, saving Tab Groups would also be a useful functionality.
++ You will get a "closing multiple tabs" warning if you have only one window open, and that one window has multiple non-app tabs open, and you have enabled the warning in Preferences. But this too unreliable to help prevent the loss of app tabs.

When I close firefox "everything " is cleared! EXCEPT when I open it again and anything i have copied to the clipboard (paste icon) remains lit... I believe this can be a security breach because I clear everything when closing firefox !!

I have my settings to clear everything when I close firefox ver 3.6.13. If I copy something to the clipboard, the Paste icon lights up so I can paste the text... which is normal.
The problem is when I close the browser and everything is suppose to clear (history, etc) the PASTE Icon still lights up for me to paste again.
This can be a security breach because I want everything cleared when closing the browser !!!
The only way I can rid myself of this problem is to restart the computer... which clears the clipboard of the operatinging... which is absolutely normal as well.
I should not have to restart the computer each time.
Try It !!! type text in any box... then paste it by using the PASTE Icon
CLEAR all your history, everything ... then close firefox
Reopen the browser... and the PASTE Icon will light up

I only had a few addons installed, I disabled Zone Alarm toolbar, View Source Chart 3.01. I also had 5 separate java console updates/addons, and I uninstalled all but the latest java console 6.0.21. All I have now is Roboform 6.9.98, Firebug 1.5.4, Java console 6.0.21, Java quick starter 1.0. So far, so good, the problem has not occurred today. I hope this is it, I will be more sure after a few days problem free. Thanks for the info.

When i Close firefox v29 i get The instruction at "0x61201669" referenced memory at "0x0000000050". The memory could not be "read".

Hi Team
Please help me with this.
Error : When i Close firefox v29 i get The instruction at "0x61201669" referenced memory at "0x0000000050". The memory could not be "read".
Version : 29
OS : windows 2003
Any suggestions ?

Thanks for the reply !
At this moment i cannot upgrade this to next version. So can someone suggest me the fix for the issue ?
thanks in advance!

When I close Firefox I cannot reopen it without restarting my computer.

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