When I close firefox (in windows 7), it doesn't fully close, I have to go to the task manager and end process before I can open it again.

Every time I try to open firefox, a window pops up saying that another instance of firefox is already running (still open from the last time firefox was open) and that another instance can't be opened. To solve this, I have to go into task manager and end the firefox (32) process. I think this started happening after getting the newest version of firefox a couple weeks ago. My computer is a month-old thinkpad with windows 7 64 bit.

see item #32 closing firefox properly
* http://dmcritchie.mvps.org/firefox/firefox-problems.htm#close_firefox

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Every time i close firefox, to re-open it i have to either log out and log back in, or i have to go through the task manager and end the proccess, otherwise it just says fire fox if already running and it wont open, how do i fix this proble??

Everytime i am finished using Firefox, if i want to go back onto the internet, i now have to either log off and then log back on. or i have to use the task manager and close the firefox process, it is extrlmely annoying as i have to do it everytime, if i try and open firefor before i do either of what i have explained it just comes up with, firefox is allready running please close all windows to open a new one, or end the process...how do i stop this message from popping up every single time i use firefox????

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

Firefox won't stop running unless I go into task manager and end process

when I shut down firefox and then later try to start it again a box comes up that says it is already running but it won't come on. So I have to go into my task manager and end the process before I can start it again. How do I solve this problem?

That is "hanging at exit". You can ignore the first part, since you already know how to do that.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** http://kb.mozillazine.org/Firefox_hangs
** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
* You may need to try Firefox Safe Mode
** You may need to use '''Safe Mode''' to locate the problem:
***See:
****https://support.mozilla.com/en-US/kb/Safe%20Mode
****http://kb.mozillazine.org/Safe_Mode
***Firefox 4 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode.
***Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox.
****In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration.
****If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas
****When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode".
****Test to see if the problem you are experiencing is corrected.
*** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it
***#by enabling '''one at a time''' until the problem reappears.
***#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons.
***#'''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit).
***#You can use "Disable all add-ons" on the Safe Mode start window.
**See the following for more information
*** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
*** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
*** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting
 
 
'''You need to update the following.''' The Plugin version(s) shown below was/were submitted with your question and is/are out of date. You should update to avoid known security issues with the version(s) you have installed. Click on "More system info..." to the right of your question to see what was included with your question.
*Adobe PDF Plug-In For Firefox and Netscape "9.4.4"
*Shockwave Flash 10.2 r152
*Next Generation Java Plug-in 1.6.0_23 for Mozilla browsers
#'''''Check your plugin versions''''' on either of the following links':
#*http://www.mozilla.com/en-US/plugincheck/
#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#*There are plugin specific testing links available from this page:
#**http://kb.mozillazine.org/Testing_plugins
#'''Update Adobe Reader (PDF plugin):'''
#*From within your existing Adobe Reader ('''if you have it already installed'''):
#**Open the Adobe Reader program from your Programs list
#**Click Help > Check for Updates
#**Follow the prompts for updating
#**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below
#*Download complete installer ('''if you do NOT have Adobe Reader installed'''):
#**SAVE the installer to your hard drive (save to your Desktop so that you can find it after the download). Exit/Close Firefox. Run the installer you just downloaded.
#**Use either of the links below:
#***https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox ''(click on "Installing and updating Adobe Reader")''
#***''Also see Download link''': http://get.adobe.com/reader/otherversions/
#*After the installation, start Firefox and check your version again.
#'''Update the [[Managing the Flash plugin|Flash]] plugin''' to the latest version.
#*Download and SAVE to your Desktop so you can find the installer later
#*If you do not have the current version, click on the "Player Download Center" link on the "'''Download and information'''" or "'''Download Manual installers'''" below
#*After download is complete, exit Firefox
#*Click on the installer you just downloaded and install
#**Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
#*Start Firefox and check your version again or test the installation by going back to the download link below
#*'''Download and information''': http://www.adobe.com/software/flash/about/
#**Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
#**Use IE to go to the above site to update the IE ActiveX
#*'''Download Manual installers'''.
#**http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
#**Note separate links for:
#***Plugin for Firefox and most other browsers
#***ActiveX for IE
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
#*Java Test: http://www.java.com/en/download/help/testvm.xml

Frequently when I open Firefox it says Firefox is already running but is not responding. I have to go to the task manager, find Firefox and close the process before I can get firefox to load.

Those are all the details I have

There is an article about this problem see:
* [[Firefox is already running but is not responding]]

When I close out Firefox, it arears to close. It returnes me to Desktop; however, it does not close. It keeps running, and because of this, I cannot open it up again without opening the Task Manager and ending the process first. What is causing this?

Firefox works fine except for the hicup of not shutting down. If you don't know what is happening, you won't know why it won't open up.

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

Why does firefox not start? I have to go to the task manager and stop the process before I can use it

Sometimes firefox won't start unless I go into the taskmanager and remove it. then it will start. But if I go out of F/F and want to re-start it. usually it re-starts but if I want to open E-mail in Msn, It won't happen.

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

When I close a .pdf file the program continues to use the CPU I have to go into Task Manager and End Task

Hi
When I close a .pdf file in Adobe Reader the program continues to run on the CPU until I go into the Task Manager and End Task.
I am running Windows 8 with Adobe Reader Ver 11.0.07, I have uninstalled the reader and reinstalled also checked for updates and ask the program to check the installation, which it did with no change I still have the problem ?.
Peter

Hi Peter,
Please check the performance by disabling the 'Protected mode' in Reader.
Edit > Preferences > Security (Enhanced) > Enable Protected Mode at startup
Uncheck this option. Click on Ok.
Close and launch Reader and check.
Ref.: http://helpx.adobe.com/acrobat/kb/protected-mode-troubleshooting-reader.html
Regards,
Rave

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 click options in addons/extensions the addon window freezes and I have to use the task manager to end the process. Any solutions?

When I click options in addons/extensions the addon window freezes and I have to use the task manager to end the process. Any solutions?

There may be a problem with one of the files that stores details of installed extensions. Try deleting these files as shown in the "Corrupt extension files" section of this link - https://support.mozilla.com/kb/Unable+to+install+add-ons
Though that article is not specifically about your problem, the method shown in the corrupt extension files section may help. When you restart Firefox after deleting those files, the list of installed extensions is rebuilt and this will hopefully fix your problem.

Whenever you try to save a PDF file to a location other than the default location ('My Documents'), Firefox freezes & you have to go to the 'Task Manager' to exit Firefox and stop the error, so you can load Firefox again.

Whenever you try to save a PDF file to a location other than the default location ('My Documents'), Firefox freezes & you have to go to the 'Task Manager' to exit Firefox and stop the error. I have Windows XP (Media Center Edition) and all updates (Firefox, Adobe PDF, Microsoft, virus protection, etc) are installed. This has only been a problem since Firefox 4, and isn't a problem in Internet Explorer.

Hi David,
Thank you for your detailed question. It sounds like the real issue is pdf files. Are there any antivirus/firewalls that might be blocking this specific file type? or are there any preferences in your control panel that might be blocking this?
Do you have any stored preferences for PDF files in Firefox?
*[[Applications panel - Set how Firefox handles different types of files]]

Sometimes Firefox will not open, telling me, it is already running. It does not show in the task manager and the only solution is to reboot.

Firefox is running. I close the program. I try to reopen it. I get an error message: Firefox is already running. It does not show in the task manager, nor anywhere else. I can not close the old version, nor start a new one. I have to reboot.

Did you look in the Processes tab in the Task Manager?
See also "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

Whenever I shut down iTunes on my computer, it keeps reopening and I have to go into Task Manager and end the process in order for it to stop doing this. I am running it on a Windows 7 Home Premium 64 bit machine.

Whenever I shutdown iTunes on my computer, it keeps re-opening and I have to go to Task Manager and end the process in order for it to shutdown.

Do you have Logitech gaming software installed on the PC? If so, perhaps try the suggestion from the following post:
Re: Everytime I close Itunes it loads back up

My computer crashed and I cant reload firefox.. I have tried the task manager and deleting uninstalling and installing program again. I click on icon and nothing appears although is running in task manager

My computer crashed and I cant reload firefox.. I have tried the task manager and deleting uninstalling and installing program again. I click on icon and nothing appears although it appears to start and is running in task manager, but the browser wont open.

See:
*http://kb.mozillazine.org/Browser_will_not_start_up
A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls

When I close firefox it doesn't close. I go to reopen it and it says that it is already running. I have to use task manager to end process to close it before i can log back on.

After browsing and I close Firefox it appears to close.
However when I go to reopen it later I get a message that Firefox is already open and I need to close it. The only wany I can close it is by using Task Manger to end process.

Must be the "hang at exit" problem. You already know how to do Step1; now just determine which Add-on (Extension or Plugin) is causing the problem. 
#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]
#Why Firefox may hang:
#*[http://support.mozilla.com/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.com/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 and Extension or Plugin causing the problem
#*See:
#**[[Safe Mode]] and [http://kb.mozillazine.org/Safe_Mode Safe Mode (Mozillazine)]
#**[http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
#**[http://support.mozilla.com/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
#**[http://support.mozilla.com/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.'''

After closing Firefox and trying to open a new session, I get periodic pop ups telling the program is still running. I open the task manager and close it, and everything's fine. What's the issue, and how do I get it to stop?

Problem doesn't happen every time, and I've tried to leave it alone to see if there's an update that needs to finish loading. After being left overnight, I still had to use the task manager to close the Firefox program. I have no idea what it's doing, and I'd like to know. Is Firefox taking over my computer so it can move on to my house, and then go on to rule the Tri State Area?

See - [https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it Firefox hangs when you close it]

When I close firefox (in windows 7), it doesn't fully close, I have to go to the task manager and end process before I can open it again.

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