Firefox Can not be completely shut down, Have to use Windows Task Manager to shut it down, I am using Vista, How to fix it????

See this: 
https://support.mozilla.com/en-US/kb/Firefox+hangs#Hang_at_exit

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Will not close completely, 572K of memory still shows in Task manager and can not force an end, thus Firefox will not restart

When I exit Firefox and try to restart I get a message that Firefox is still running. When I go to Task Manager it shows 572k of memory being used by firefox.exe. When I hit "End Process" nothing happens it still there. The only way I can restart Firefox is to restart my computer. I have been running Firefox on this machine running XP for about 18 months but this problem just started a week ago. I have even re installed Firefox.

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

Mafia Wars can not load completely because you are missing a plugin, pop up is too small to see the missing pluging, how do I find out what it is?

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Try a program such as Disk Inventory X or OmniDiskSweeper.
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Firefox grows to 200,000K and hangs; have to close with task manager--please help!

usually happens when I'm on AOL...After I close Firefox with windows' Task manager, I can restart Firefox. I'm using Microsoft Windows XP. I get the usual, message on Firefox restart about unexpected closing of previous session... I'm running the latest version of Firefox and i use McAfee Security and Microsoft Security essentials. It is happening now even though I'm NOT running AOL

Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode

Firefox freezes or does not go away when closed I need to use window task manager

In Windows 7 Firefox often freezes or will not go away even if I close it.
So far the only way to resolve this issues if it last is to close it with Windows Task Manager.
Which obviously means that if I was frozen I loose any other tab that is open

See http://kb.mozillazine.org/Firefox_hangs and [[Firefox hangs]] (Hang at exit)

Firefox won't start after upgrade, it appears on the windows task manager but closing the firefox.exe doesn't help

I upgraded to firefox 4 and it asked me to restart the system, since then it stopped working. it just won't open. I have windows xp and when I click on the firefox icon I see firefox.exe in the windows task manager under 'processes' I tried ending the task but it wont help. i also tried removing and reinstalling.. didn't help either :( I also checked if Kaspersky might be blocking it but it isn't

The only thing that worked for me was installing an older version (3.6) and it started working fine... I dont even want to try upgrading it to 4 again..

Firefox will not open because it thinks it is open, but task manager says it is not open.

I cannot get firefox to open. If I try to uninstall it says I must close it. If I try to download it it says I must close it.

Sounds like Firefox is "hanging at exit". That problem is frequently caused by an Extension or a Plugin. Read all of the following articles. 
NOTE: Establish a habit of exiting/closing Firefox with Firefox button > Exit or File > Exit to allow an orderly shutdown of Firefox and closing of all of the files that Firefox has open.
#Stop the Firefox process:
#*[http://kb.mozillazine.org/Kill_application Mozillazine - Kill application]
#*Windows 7 users click [http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576 here]
#*Mac users: http://techheavy.com/2011/02/the-mac-task-manager/
#Why Firefox may hang:
#*[http://support.mozilla.org/en-US/kb/Firefox+hangs Firefox hangs] (see Hang at exit)
#*[http://kb.mozillazine.org/Firefox_hangs Firefox hangs (Mozillazine)] (see Hang at exit and Closing Firefox properly)
#*[https://support.mozilla.org/en-US/kb/Firefox+is+already+running+but+is+not+responding Firefox is already running but is not responding]
#Use Firefox Safe Mode to find a problem with an Extension or Plugin:
#*Don't check anything when entering Safe Mode, just continue
#*If the problem does not occur in Safe Mode it is probably an Extension or Plugin causing the problem
#*See:
#**[[Safe Mode]] and [http://kb.mozillazine.org/Safe_Mode Safe Mode (Mozillazine)]
#**[http://support.mozilla.org/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
#**[http://support.mozilla.org/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
#**[http://support.mozilla.org/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''

I frequently find that when closing Firefox, and try to reopen again, get error message "Firefox is already running, but not responding. Recommend to close it, or restart system". Using Windows Task Manager, no application is found. After restart, OK.

At the update to Firefox 3.6.8, I also updated to Flash 10.

I get this problem often, on my computer which runs XP, I find simply waiting a few moments (up to a minute) is enough to end the process.
On my Vista machine, it sometimes works that way, but if FF locked up (stopped) and is ended through the task manager, it often requires a reboot or a much longer wait (up to 10 minutes or more).

How do I stop Firefox from thinking it crashed and doing a recovery when forced to use Windows Task manager to close a bad URL that I never want to go back to?

Long question, I know :~) There are web sites that I may visit that will not allow me to exit the site, so I use Alt-Ctrl-Del in Windows to start the Task Manager and force the site to close by ending the program. The new version of Firefox (31.0) thinks that Firefox crashed and send me right back to the source of my problem.
Your documentation for this process is as follows:
After a crash
Due to unexpected issues such as problems with a website, software errors, or an accidental loss of power, Firefox may unexpectedly close. In these situations, Firefox can restore the pages that you were visiting when it is restarted. Firefox will automatically restore your previous session, the first time you launch it after a crash.
If Firefox crashes a second time, the Restore Session (i.e. "Well, this is embarrassing") page will appear when you next launch Firefox.
...and this is what I found trying to stop this process. Next, when I am forced to use Task Manager to close Firefox a second time to stop a badware site, then the 'Well this is embarrassing' dialog appears and I am finally safely away from the URL.
I do not want Firefox automatically sending me back to a problem site.
Thank you for any procedure you can suggest to stop Firefox from restoring problem web pages, Art Clapton

I am unwilling to attempt navigation away from these sites. The pop-ups that occur on the attempt to leave a site or to close the browser are exit traps offering incentive to stay.
Once upon a time, when the internet was less dangerous, I would be willing to close the exit pop-ups. Now, after twice being infected with malware trying to close the pop-ups, I now force close whichever browser I am using.
Recently, I clicked on the red X to close one pop-up, and it installed a trojan that I had to pay to be removed. When I clicked on 'Leave' in another exit pop, it didn't exit and it turned out I was giving permission to run a script file. Now that criminals have learned these exit pop-ups can be used to force a click action, the sites using them have become dangerous.
If I force the browser to close using Task manager, Please tell me how to stop FireFox from sending me directly back to the same site because it mistakenly believes it crashed when it did not. I forced it to close because I was on a site that had taken control of my browser and was not allowing me to leave the site.
No other browser sends me back to the potentially dangerous sites. I prefer Firefox, but the new version must have a setting that allows me to get safely away from a problem site?

When I close Firefox, the window closes but the Firefox.exe process and Plug-in Container remain running in the background and have to be shut down using Windows Task Manager.

This happens frequently. Something in Firefox continues to run even when the program is closed. The process has to be stopped before I can open Firefox again.

Thanks. Closing with File/Exit instead of the X closes Firefox properly. AT LAST! A solution!

Firefox will not open when I click the icon and windows task manger indicates firefox is running.

I can't open firefox. I click the icon, my cursor shows Firefox is loading, then nothing happens, the screen remains the same.

Hi Iekard.
Press CTRL+SHIFT+ESC to see if the firefox.exe process is running. If it is, terminate it and try to run Firefox again.
If that doesn't help, try running Firefox in safe mode. If it works like that, maybe it'll work again in normal mode.

When I close Firefox (3.6.10) by using the x in upper right and then try to start it later, I get message FF is running, you must close first..which I thought I did. Cannot start without using Windows Task Manager and closing process. What is wrong?

See original question. Firefox apparently doesn't close when using the x in upper right corner as when I try to start it again I get a message that FF is already running and I must close it first. I thought the x would do that. Is something set wrong or corrupted?
Thanks

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

I cannot purchase a movie bundle on my iPad it says purchase can not be completed contact support iTunes. Any suggestions as to why this is happening?

I cannot purchase a movie bundle on my iPad it says purchase can not be completed contact support iTunes. Any suggestions as to why this is happening?

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Installed Adobe dlm add-on and now Firfox will not open. I see the process starting in Task Manager but no window opens. Unistalled Firefox then re-installed but still no luck. HELP ME!

''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/793259]''
I installed Adobe dlm add-on and now Firefox will not open. I see the process starting in Task Manager but no window opens. Unistalled Firefox then re-installed but still no luck. HELP ME! I do not want to use IE! I presume it has something to do with Adobe DLM as ever since then it is not working.

I had this problem for a couple weeks as well and it was extremely frustrating considering we use firefox for all our company tasks. Here is the solution:
First of all if you have no bookmarks you want to save, then go directly to step 7. If you want to save your bookmarks first, then follow these steps.
1. Shut down the computer
2. Reboot and open firefox
3. Go to Task Manager, right click firefox.exe, and click END PROCESS TREE
4. WAIT 30 SECONDS! Then Double-click the shortcut to try and open firefox again
5.Repeat steps 3 and 4 until firefox finally opens (trust me, eventually it will)
6. Once it finally opens, backup your bookmarks,
7. Download a copy of firefox from there website
8. Uninstall from programs menu and make sure to check the box REMOVE ALL COMPONENTS
9. install the new copy and BOOM! it works
If it doesn't work, you're an idiot. If you don't want to reinstall firefox, then you're out of luck. Good Luck!

Close Firefox, restart it says firefox can not start - already running, tried deleting the parent.lock it doesn't exist. I try to turn off my computer it says WidgiBho needs to close, I tell it to close but computer never shuts down

close Firefox, restart it says firefox can not start - already running, tried deleting the parent.lock it doesn't exist. I try to turn off my computer it says WidgiBho needs to close, I tell it to close but computer never shuts down

Did you try to wait a bit longer before restarting Firefox to give Firefox more time to close down completely?
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

Firefox Can not be completely shut down, Have to use Windows Task Manager to shut it down, I am using Vista, How to fix it????

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