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]]

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I just updated firefox TODAY 8/17/11 and after the update i can't open firefox unless i restart my computer or i delete going to windows task manager and process, also i can't open a new window, it won't allow it. please can you help me

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Hey Elaine07!
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If I close a session on Firefox and then try to reopen it, I get a screen that says "you must close your current session because Firefox is already running".

The power went out and when it came back on, my computer seemed fine. I was able to access the internet through Firefox as usual. However, if I closed my session and tried to reopen it, it would say that there was already a session open and that I would have to close it before trying again. I would have to go to the task manager and find Firefox in the list of processes and end the process in order to get back to the internet. I have tried restarting my computer twice. What could be the problem?

Try to wait a bit longer before reopening Firefox to give Firefox more time to close completely. 
You can also try to use Firefox/File > Exit to close Firefox.
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs
See also:
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

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..

When I exit Firefox and later load Firefox it says its open, although I can't use, have to go to Windows Task Manager and force it to close before I can load it again.

Problem is on a Dell Studio XPS desktop with the i7 processor. Current version used is 3.6.13, although the problem occurred with previous version, and only occurs intermittently. Does not seem to be time related. Sometimes, though not always, there will be two copies of Firefox open in the Task Manager "processes". When I close Firefox, and reload, runs fine until the next time.

https://support.mozilla.com/en-US/kb/Firefox%20hangs (hang-at-exit)

When I close firefox and then try to reopen it later it often says that it cannot open firefox because it is already open and that I must close it before it can open a new window.

When I look at the task manager it is not listed at all. It will work if I restart my computer.

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

Once I close all windows and try to open another I get a message saying"Firefox is still running, you must close all browers before opening a new window. Why is this happening? I have the 3.5.10 Version

I close all Firefox windows. When I try to open another window later I get a message telling me that Firefox is still running and that I need to close all windows or restart my computer. I have this about 3 times a day this past week but prior to that it was maybe every one or 2 weeks. I had the 3.5.10 Version of Firefox, but have just updated to see if this stops this from happening. But what do I do if it doesn't stop it?

There are a few possible causes for that error, for details see [[Firefox is already running but is not responding]]

I've had issues with Firefox hanging in memory even if I try to remove it using the Windows task manager's "End Process" button. My only alternative is to force a reboot on my PC.

Since upgrading to Firefox 7.0.1 I've noticed the abovementioned problem. I usually have a couple of app tabs with GMail information on them (two different e-mail accounts, one of which is just the contacts page and the other is the inbox and one tab with a GMail calendar for one of the accounts) and my home page, which is Google News. While I cannot say for certain that it is related to multimedia streaming, it does appear to happen after I play some kind of video file like the videos for The Daily Show with Jon Stewart. My O/S is XP Pro SP3, my PC is a Dell Inspiron 700m w/2GB RAM. The Add-Ons that I have, as far as I can remember, are AdBlock Plus, Tab Mix Plus, WOT Safe Browsing Tool, and Download Statusbar along with the usual Java stuff. My Adobe plug-ins are always updated whenever I get an update message.

Since upgrading to Firefox 7.0.1 I've noticed the abovementioned problem. I usually have a couple of app tabs with GMail information on them (two different e-mail accounts, one of which is just the contacts page and the other is the inbox and one tab with a GMail calendar for one of the accounts) and my home page, which is Google News. While I cannot say for certain that it is related to multimedia streaming, it does appear to happen after I play some kind of video file like the videos for The Daily Show with Jon Stewart. My O/S is XP Pro SP3, my PC is a Dell Inspiron 700m w/2GB RAM. The Add-Ons that I have, as far as I can remember, are AdBlock Plus, Tab Mix Plus, WOT Safe Browsing Tool, and Download Statusbar along with the usual Java stuff. My Adobe plug-ins are always updated whenever I get an update message.

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When i try to sync to itunes i get message== phone can not sync to itunes cause apple mobile device service is not started, how do i start service?

I'd start with the following document with that one:
iPhone, iPad, iPod touch: How to restart the Apple Mobile Device Service (AMDS) on Windows

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

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 and then try to open it, it says it is already running and I have to close it which I can't do. The only way to open it is to first restart my computer which is a pain. If I can't fix this I will use an other brouser!

I am not sure what more I can tell you. I close firefox. So when I click on the icon it should allow me to open it again but I get a message that says it is already running. Either close it out which I can't do since I already did that or restart the computer.

Try holding control, alt and delete down in succession and then a dialogue box will appear with windows task manager. Once open click on the Processes Tab and look for firefox.exe. Highlight this and then click end process. It should come up with a warning but just click Yes. This should then close firefox and allow you to reopen it from your desktop without shutting down your computer. Hope this helps.

I keep getting the message, "Windows cannot find 'c:\Program Files (x86)\Mozilla Firefox\firefox.exe'. Make sure you typed the name correctly, and then try again." I get it when I either try to open it from the Start menu or from the desktop icon.

I've just installed Firefox on my laptop and keep getting the message, "Windows cannot find 'c:\Program Files (x86)\Mozilla Firefox\firefox.exe'. Make sure you typed the name correctly, and then try again." I get this message whenever I either try to open it from the Start menu or from the desktop icon. I've never gotten it to work and even uninstalled it and then redownloaded it and still cannot get it to open. Any help would be greatly appreciated!!!!

Are you installing from the official site? http://www.mozilla.com/firefox
If you use Windows Explorer (My Computer) to check that path, is the Mozilla Firefox folder there? That is the normal installation location, but I think it's worth checking.
If the folder isn't there or firefox.exe is not in it, I wonder whether some other software might be interfering. You might want to run some supplemental security scans. These two tools are highly regarded:
Malwarebytes Anti-malware : http://www.malwarebytes.org/products/malwarebytes_free
SUPERAntiSpyware : http://www.superantispyware.com/

I close Firefox then when I try to reopen it later it tells me its still running and I should close that before opening it again... But its NOT running in a way where I can close it!?! What should I do?

I am using Firefox in a Windows 7 64-bit environment. I have what I feel is a fairly standard set of programs installed. MS Office, Adobe Photoshop, Nero Burning ROM, Diskeeper... etc. And I have the latest regular version of Firefox installed, version 3.6.13.
And lately 2, out of 3, times I close Firefox it must not be closing correctly. But I cannot tell until I need to reopen it. Then I get an error message saying that it's already running and I should close the "current instance" of the software. Now I can either start up the task manager and kill it ... or I can restart my computer. And I've done both. But it keeps happening.
So I am wondering what might be causing this to happen? And If there is anything I can do to correct the issue?

For more information see [[Basic Troubleshooting]], under
'''4. Restart Firefox in Safe 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?

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