My browser has been closed all night and in the morning I get an error saying that Firefox is still running and I need to shut it donw. Why is this?

I close the browser and it does not matter how much time elapses it still says that Firefox is running. I am told to close Firefox before I can open another session. I hit ctrl+alt+del to pull the task manager and it does not show any Firefox applications.

There is no '''5.1''' - Firefox 5.'''0'''.1 was a special version to fix some Mac OSX issues which Apple created with the 10.5 and 10.6 updates and the release of 10.7 Lion last week. Windows and Linux versions don't need those patches and weren't updated. The global download server array can't handle different version numbers for different OS platforms, so the full download versions had to be version number "bumped" for Windows & Linux to match the new Mac version number.
As far as your support question, you probably had a "hung" Firefox '''Process''' - look in the '''Processes''' tab in the Task Manager. 
https://support.mozilla.com/en-US/kb/Firefox%20hangs See '''hang-at-exit'''

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I use Firefox 6.0.2. When I shut the browser and try to reopen it I get a message saying that Firefox is still running and that I should reboot. This happens constantly. Why does this happen and is there a way around it?

I use Firefox 6.0.2. When I shut the browser and try to reopen it I get a message saying that Firefox is still running and that I should reboot. This happens constantly. Why does this happen and is there a way around it?

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

After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this?

Question
After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this? edit

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

When I try to start Firefox, I get a message saying that Firefox is already running and cannot be re-started, so close down and reboot.

Following an upgrade of my OS from XP to Vista, I tried to point the new installation at my old profile. Now when I try to start FF, I get a message saying that it is already running and I should reboot to clear the problem. I've done that but the problem remains. I have uninstalled firefox and reinstalled v4 beta. The problem remains. Any ideas?

OK, I had moved the profile file inside the profile folder which was created when I installed FF, to the main FF folder. I then took the equivalent file which existed under XP before my upgrade to vista, and moved it into the new Profile folder. That's when I hit the problem described in the initial question.
So, what I did following Tony's response was to move the bookmarks password and cookies files into the profile created on the install. I then moved that file into the profile folder and moved the one I'd saved from XP, out to the main FF folder.
Started FF and voila! All working fine. Thanks for your help.

Firefox will not open or stay open especially when I'm first getting on it for the day. It will sometimes say that firefox is already running and that I have to close it which I don't understand.

Right now I'm staying connected but when I tried it at 2:00 Firefox would not stay connected. It would keep saying not responding. Also sometimes if I would go to fast it would just jam up. I could be connected and then go to my email and it would say lost connection. It just kept changing as though I was getting more that one connection. Hopefully you can help me.

Basically it means firefox didnt Shut down properly and if you close firefox and you try to open it again and you get the message firefox is already running then in windows right click on the taskbar and press on task manager and then once task manager is open press on processes and look for firefox.exe and then where it says End process click that and it will close firefox properly ok and then you can open firefox up again properly ok and for mac its a differnat way ok

When downloading updates for Quicktime 7 and Itunes 10 I keep getting an error saying that files shared by these updates has an invalid signature and that the downloaded has been removed.

When downloading updated for Quicktime 7 and Itunes 10 I keep getting an error saying that files shared by these updates has an invalid signature and that the downloaded has been removed. If I don't get that message I get a message saying that the download was unsuccesful and that in order to download I need to go to tools and then select dowload only. Please help I really want to update my iphone!

Thanks for helping out, but I already tried these steps.
I even tried this on a iMac with similar results. The only difference was that the errorcode was called 2001 instead of 21.
Today I took the phone to www.iphoneambulancen.dk. A guy (in Aarhus, Denmark) that specializes in iPhone repairs. I figured, that given his occupation he'd seen most errorcdes. Two hours later, he called me back, and told me that he had replaced the battery.
So, it turns out that a broken battery can cause this behaviour.
But thanks again

I have subscribed to the student package and I also received a confirmation SMS saying that the amount has been deducted. But when I sign in through creative cloud, it shows that I am still running on a trial version. Why is that?

I have subscribed to the student package and I also received a confirmation SMS saying that the amount has been deducted. But when I sign in through creative cloud, it shows that I am still running on a trial version. Why is that?

Sign in, activation, or connection errors | CS5.5 and later, Acrobat DC
Mylenium

What do I do to straighten out this problem... When I try to access Firefox after having logged out of a previous session I get a msg that Firefox is still running and I have to restart the computer in order to access internet.

What do I do to straighten out this problem: When I try to access Firefox after I've logged out of a previous session I get a msg that Firefox is still running and I have to restart the computer in order to access internet...

All you need to do is wait. While Firefox appears closed, it's not. It doing house cleaning. Cleaning out cookies and cache. How long it takes depends upon how much garbage you have collected.
If you start the Task Manager and open the Process window, you will be able to see when Firefox has finished up and closed down.
If you forced Firefox to close using the task manager, then the house keeping process seems to freeze up.
Also, as you've already found out from the above link, some programs and plugins will prevent Firefox from closing properly. I've found this less common then simply being in a hurry. But you need to also consider it.

I can not open firefox when I leave the program is tells me that firefox is still running and will not open

#
I can not open firefox when I leave the program is tells me that firefox is still running and will not open
# Details
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Because Firefox sucks that way. I have the same problem. Royal pain in the @$$. I have to use the task manager to duck out of it, or you have to w8 & count to 10...lol. Stupid program.

When i try to load certain page, the system crashed and the bottom panel states " stopped" but when I close and open firefox again,it can't and I get this message that says my firefox is still running and to open the browser i need to restart the compu

while browsing suddenly the system crashed and the bottom panel says " stopped".When closed and re-opened, I got a prompt that says firefox is still running and i have to close to open again or have to restart the computer but it doesn't work
== This happened ==
Every time Firefox opened
== just happened

You get message "firefox is still running" and computer restart doesn't help you. Try the advice below.
Make sure Firefox isn't running (end firefox.exe process in Task Manager or restart computer)
Find your profile folder
C:\Documents and Settings\USERNAME\Application Data\Mozilla\Firefox\Profiles\xxxxxxxx.default
find file "parent.lock" in it and delete it (the file is empty, its function is to signify to Firefox whether it's already open or not).
Then try to open Firefox again. Will it start or not? What will it say?

I close Firefox session and then try to open a new browser window - get message that Firefox is still running and I need to shut down and restart. Need a solution

I close a Firefox browser and at a later time want to open a new browser window but get message "Firefox is still running and I need to shut down before I can open a new session" I do not want to shut down as this is laborious - I can go into task manager and processes and click on Firefox and end session that way but this is not the solution. Firefox seems to be running in background but I cannot open a new session window without doing on of the above.

Have a look at this post, see if it is of any help (though related to Vista, but same issue can be there with Window 7 also)
http://www.vistax64.com/browsers-mail/265937-firefox-exe-still-running.html

I am getting complaints from links that Firefox is already running and needs to be closed when it is not visibly running. But, I do find it as a process that IS running. What gives?

I click on a link in an E-mail. It complains that Firefox is already running and I must close it. Firefox is NOT visibly running. I check via Task Manager to verify. I find Firefox is running as a process. I kill the process and then can proceed. I did use Firefox earlier and closed it.

Make sure that you do not start Firefox with the -no-remote switch or have set the environment variable MOZ_NO_REMOTE=1 (Control Panel > System > Advanced > Environment variables).
If you need to have more than one profile open at the same time then start subsequent instances with the -no-remote command line switch. 
You can send links from other programs to a Firefox instance that is started with -no-remote, you need to drag links in a Firefox window in such cases.
See http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile

I close Firefox and then try to shut down my computer, but Windows says that Firefox is still running. It does not show up as running in Task Manager. I have uninstalled and reinstalled several times with same result.

I have also had problems starting Firefox. I click the icon and nothing happens. That problem is intermittent. The Windows message that Firefox is still running after I have closed the Firefox browser keeps occurring and I do not know how to remedy this.

The one thing that is locking up fire fox is the plug ins. You have to check to see if a plug in is locking up firefox first of all.
To see the processes press : CTRL+ALT+DEL. then click the tab marked "Processes" Then look for Fire Fox and click on it. Click the Yes button when the warning box show up.
Then do the say for "Plug-in Container" I believe that is called.
this is because all ads are now flash ads or video ads. They lock my computer up all the time.
When the CTRL+ALT+DEL are pressed. Keep this minimized and you can see if your computer is running at 100% memory near the clock. If the box is totally green, you are running a lot of programs on your system. Check the processes and find out what is not needed. Also watch your virtual memory. Rule of thumb is 1.5x total memory.
Then now it would be able to shut down the computer the right way.
Hope this helps you out.

After closeing firefox and trying to reopen I get a mesage that firefox is still running and needs to be closed

Each time I close out firefox and try to open it again I get a message the it is still running and needs to be closed. I have to log out to get it to restart

See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

After I exit Firefox, I keep getting messages that Firefox is still running and I have restart my computer. How can I avoid this from happening?

This happens when I close the internet browser. When i want to go back on, nearly every time, I get the message that firefox is till running, close or restart the computer. Since i have closed it, I continuously have to restart my computer (or switch over to Chrome)

Sounds like it is hanging when you exit and later try to restart Firefox.
* 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: 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 "9.3.3"
*Shockwave Flash 10.2 r152
*Next Generation Java Plug-in 1.6.0_24 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

My browser has been closed all night and in the morning I get an error saying that Firefox is still running and I need to shut it donw. Why is this?

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