According to my computer firefox is running however I cannot open it

I have been using firefox for years, I now also use internet explorer, when I try to open firefox it does not open. I tried to uninstall so I could reinstall but it says I must close firefox. All of my bookmarks are very important to me on the firefox program. Can someone help?

See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

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Tried to update to 3.6.6. get message that it was unsuccessful. Message asked to check if another copy of firefox was running. I cannot find another copy of firefox. It will not let me access firefox. I am accessing Mozilla on IE. ???

I attempted to upgrade to 3.6.6. and it failed. Now continuously goes to install then message states it failed and to check if other copies of firefox are running. I cannot locate any other copies. Bottom line, I can't open firefox.Don't want to remove and re-install because I need my bookmarks.
== This happened ==
Every time Firefox opened

See also:
*https://support.mozilla.org/kb/ive-lost-my-firefox-sync-account-information

Firefox process keeps running. I cannot open a new session until I manually stop Firefox 32 process in tax manager. Using Win Vista Ultimate 64 Version 6.0 Service Pack 2

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Firefox is already running but is not responding
* https://support.mozilla.com/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding
Firefox Hang at Exit
* https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_hang-at-exit
Check and tell if its working.

Gardei@gardei-lab:~$ ./firefox/firefox XPCOMGlueLoad error for file /home/gardei/firefox/libxpcom.so: libxul.so: cannot open shared object file: No such file or

Friends:
The latest Firefox won't launch. Here's what I get...
gardei@gardei-lab:~$ ./firefox/firefox
XPCOMGlueLoad error for file /home/gardei/firefox/libxpcom.so:
libxul.so: cannot open shared object file: No such file or directory
Couldn't load XPCOM.
Both .so files exist in ./firefox
Thanks. -- BG

Hello,
Certain Firefox problems can be solved by performing a ''Clean reinstall''. 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 http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#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.
Please report back to see if this helped you!
Thank you.

I have the latest version of Adobe Reader. However I cannot open a PDF document online. I was always able to do this on the particular website. What can I do please?

I have the latest version of Acrobat Reader. However I cannot open a PDF document online. I was always able to do this on the particular website. What can I do please?

What is your operating system? Browser? Reader version?
What exactly means "cannot"?

Firefox is running but will not open even after re-installing

I have tried re-installing firefox but it still won't open. If I go onto task manager I can see that it is running in the background. I am currently using google chrome as my default browser.

I have three computers that are practicably clones of each other and the new itunes update failed on two of them but one worrked fine. Here is fix that worked for me. This fix was suggested by another member but I cannot recall or find his post. My system is WinXP sp3 with all the latest patches.
1. Download AirPort Utility 5.5.1 for Windows http://support.apple.com/downloads/
2. Open task Manager and stop the mdnsresponder process. The corrupted mdnsresponder will be using 50% of your cpu.
3. Open control panel / add remove programs. Find the bonjour app and click on it.
4. Note the corrupted version of bonjour 2.0.0.34 by clicking on the support link.
5. Uninstall bonjour
6. Restart Windows.
7. Install the AirPort Utility. This will install a good working version of mdnsresponder. Restart windows again.
8. Upon restart you will see a new the airport icon in your task tray. You can also find mdnsresponder.exe running under process in task manger with little or no cpu usage. Your bonjour app under add remove panel will now be version 1.0.106

I downloaded Firefox 4 but my laptop cannot open Firefox 4. I want my old Firefox so I don't lose my bookmarks, etc. Now I can't open Firefox at all.

As propmted by firefox, I downloaded Firefox 4 for my Mac. However, my Mac is not able to open this version of Firefox. I bought the computer in 2007 and have not had it updated since. I replaced my old firefox so now I cannot open the browser at all. Can I download an old version of firefox? Are my bookmarks lost?

Firefox 4 requires at least OS X 10.5. You can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html
When you re-install Firefox 3.6 it will use your existing bookmarks and other user data.

When I try to download firefox I get this error "cannot open output file". I had firefox once but uninstalled it now I cant' reinstall. Why?

I had firefox but uninstalled it because of problems with add on Recipefox. Now when I try to reinstall it I get and error message "cannot open output file". I really liked firefox, How do I get it back?

When you click the download link on [http://getfirefox.com GetFirefox.com], you should be asked if you wish to Run or Save the file. If the described situation happens when trying to Run the download, try instead to Save it and put the file on your Desktop or a similar place where you are certain that you can find it again.
When the download is complete, try double-clicking the downloaded file in the normal Windows Explorer (browse your way to the file from My Computer). This should start the installation.
If you notice in the Explorer window that the file seems to be lacking the Firefox orange/blue icon, rightclick the file and select Properties. The picture should look somewhat like the attached picture (except that mine's in danish, but that is irrelevant) if saved correctly - if it does NOT look like this, please describe the contents or attach a screenshot of the box. Especially what it says under "File type" - it should be "Program"; if it's not, we'll have to look into what the problem could be here.
Slightly off-topic, your Internet Explorer seems to be quite a bit out of date (IE 6, where current version is IE 8), so I would strongly recommend that you try to run Windows Update to get your system updated. If this is a company system (like a Terminal Server thin client machine), this may not be possible, and your system administrator will most likely have to help you.

I downloaded updates to iphoto and computer erred on install. I cannot open iphoto. I decided to reinstall iphoto from app disk and now I get an error message"......iphoto may be damaged or incomplete" Any suggestions how to get iphoto going again???

I downloaded updates to iphoto and computer erred on install. A report went to Apple.
I cannot open iphoto. I decided to reinstall iphoto from my app disk and now I get an error message"......iphoto may be damaged or incomplete" Any suggestions how to get iphoto going again???
My iphoto library still exists and I don't want to lose it.

https://discussions.apple.com/community/ilife/iphoto

My computer thinks firefox is running and will not open browser window,error = firefox is already running, you need to terminate the process or restart computer. restart has no effect. what file would make the computer think firefox is running?

Reinstalling does not help. Computer locked up for unkown reason and this has happened ever since when i try to start firefox.
Is there a file I can delete or kill that will terminate this process?

See:
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding
Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

After installing Firefox then closing it, I cannot open it, PC says it has been cancelled due to restrictions on my computer

I have run Firefox for over a year now. However I ended up with various pop-ups recently though they were easy enough to remove and didn't effect Firefox in any obvious way. In the past few days every time I have attempted to open Firefox, even right-clicking on the .exe file a warning pops-up saying "the operation has been cancelled due to restrictions in effect on this computer. please contact your system administrator".
I uninstalled and reinstalled Firefox and it worked fine, only to return to that warning message after I closed and re-opened it. This has also effected Google Chrome in the exact same way even though I never owned Chrome until all this business began. Internet Explorer, which I'm on now has suffered no problems.

Do a malware check with some malware scanning programs on the Windows computer. 
Please scan with all programs because each program detects different malware. 
All these programs have free versions.
Make sure that you update each program to get the latest version of their databases before doing a scan.
*Malwarebytes' Anti-Malware: http://www.malwarebytes.org/mbam.php
*AdwCleaner: http://www.bleepingcomputer.com/download/adwcleaner/ http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
*SuperAntispyware: http://www.superantispyware.com/
*Microsoft Safety Scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx
*Windows Defender: Home Page: http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
*Spybot Search & Destroy: http://www.safer-networking.org/en/index.html
*Kasperky Free Security Scan: http://www.kaspersky.com/security-scan
You can also do a check for a rootkit infection with TDSSKiller.
*Anti-rootkit utility TDSSKiller: http://support.kaspersky.com/5350?el=88446
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

I have to restart the computer to reach firefox and even then I cannot open Firefox, I get incomatible, WHY????????

I have Windows 7 and have a hard time opening the Firefox browser. When I click to check compatibilty it says not compatible. Sometimes it say I need Service pack 2 from Windows XP and when I download it it says something about not for this type of hardware.
I like Firefox but it is getting to be a hassle. If I restar the computer sometimes I get one access, if I click sleep and return to the computer I cannot get Firefox to start. Thanks pleas answer to [email protected]

Many thanks for responding. Your suggestion led me to this website:
https://support.mozilla.com/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding
which infers the problem exists and seems to confirm the only way is to restart the machine.
Not being computer literate I cannot tell whether or not you can get around the 'lock/unlock' problem! What I need is an easy 'fix' but there does not appear to be one!!
Thanks for trying!
Cheers
Mike Barker

I can log into my MSN Hotmail account, however I CANNOT open, or even select and delete any e-mails, while I am able to do so with another laptop, also using firefox sitting next to it. Whats wrong?

.....

Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
*Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
"Remove Cookies" from sites causing problems:
*Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do not click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I purchased a new computer within the year and thought I downloaded pages and I did however I cannot open anything in pages sent to me'

I am going to close and go to a store I have apple care and I am not doing well doing this. thanks

When you save what kind of documents? Reader Touch or Reader XI do not create pdf files. There are all sorts of problems emailing pdf files. It recommended that you post a link to a pdf file save on the net and email the link.

I have Adobe Acrobat installed and recently updated and just downloaded Adobe Reader, which is running, and still cannot open a PDF.

Nothing happens. I get the same screen that tells me to download the computer.

You'll need to right-click, download the pdf and use File>Open from within Reader. That combination is not supported any more. Chrome broke it.

According to my computer firefox is running however I cannot open it

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