Firefox won't run because it 'is already running' I have tried all steps in firefox crashes articles

I had a spectacular crash in Firefox (FF) - Malware or a virus - I think my system is clean now.
I removed FF and all FF/Mozilla files, downloaded a new FF. It will not run because:
"Close Firefox
A copy of Firefox is already open. Only one copy of Firefox can be open at a time"
I have tried all the remedies on the 'FF crashes' support page. The profile manager doesn't run probably because that was among the files I deleted.
All other apps seem to run fine.

Start with item #2
#close Firefox with File > Exit or "Firefox" button > Exit. Give Firefox some time to close and
#check that it finished via Windows 7 shortcut to WTM "Ctrl+Shift+Esc" in the "Processes" tab make sure that firefox.exe is no longer running -- if it is still running then terminate it by selecting the use "End Process" button or from context menu.
#proceed with the install

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I have a HP laptop, when i try to do certain things that require flash player it tells me i need to install the latest version so when i try it says its already installed. i have tried all the trouble shooting suggestions and it stll isnt working. i have

i have a HP laptop, when i try to do certain things that require flash player it tells me i need to install the latest version so when i try it says its already installed. i have tried all the trouble shooting suggestions and it stll isnt working. I even checked the activex filtering and that doesn't seem to be the problem.

First, confirm that ActiveX Filtering is configured to allow Flash content:
https://forums.adobe.com/thread/867968
Internet Explorer 11 introduces a number of changes both to how the browser identifies itself to remote web servers, and to how it processes JavaScript intended to target behaviors specific to Internet Explorer. Unfortunately, this means that content on some sites will be broken until the content provider changes their site to conform to the new development approach required by modern versions of IE.
You can try to work around these issues by using Compatibility View:
http://windows.microsoft.com/en-us/internet-explorer/use-compatibility-view#ie=ie-11
If that is too inconvenient, using Google Chrome may be a preferable alternative.

Itunes won't recognize my iPhone when plugged in, I have tried EVERY step from support and nothing.

Itunes will not recognize my iPhone when I plug it into the computer, I have tried every step that support says to try and nothing has worked

I tried that and iTunes and iPhoto still won't recognize the device. Any other suggestions?
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I use Firefox to access the internet-but when I go off the internet but don't shut down, then go back on Firefox it won't open because "it is already running". Task Manager doesn't show that it is operating so I can't shut it off. What to do?

It is in the question but to repeat.
1. When I go online I use Mozilla Firefox
2. While I am doing other work, I usually close the internet.
3. If I go back on the internet and click on Mozilla it won't come up, stating that "it is already running".
4. Despite that, when I open Task Manager, it doesn't show that it is running so I can't shut it down or open it.
5. If I log off or shut off the computer, then after I log in or reboot the computer, I can open Mozilla.
Thanks from a Mozilla fan.

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

Won't print to hp officejet d135 correctly. Have tried all reported solutions

This problem started from the time we started using Firefox. We went to FF from IE because of problems there. I've tried everything I know how to do but it will not print correctly or it prints blank pages and nothing else or partial pages. I'm at my wits end. Thanks.

See this: <br />
http://kb.mozillazine.org/Problems_printing_web_pages

Firefox and Thunderbird get locked into 'processes' which means I can't open either program because it is 'already running' - I asked this B4 but I crashed and lost bookmark.

After I open Firefox or T-Bird, use it and then close it it stays running in 'processes' when I open Task Manager. When I try to open it a 2nd time it won't open because it's 'already running.' When I check Task Manager I find it listed twice in processes but can only 'end process' for one of the two instances. Then I need to restart the computer B4 I can open Firefox for a second time. I posted this previously but my PC (Win 7 Prof, 64 bit with 4 AMD processors and 8 GB of memory) crashed, I had to reformat the hard drive and hadn't backed up or printed out my bookmarks, so I can't find my way back to the area where 3 people said they had the same problem.

Thank you. I just downloaded it on Tuesday but I'll uninstall it and reinstall it tomorrow. I haven't been to bed since getting up Tuesday morning and I'm going to shut this baby down and get there. Thanx for your help. -Bob Miller

Firefox won't open because it says it is already open when it ain't

Firefox won't open because it says it is already open. It appears Firefox is operating in the background. Tried to remove it but we get the same message to log out of Firefox. For 10 years we have been using McAfee with all features but it does not detect any virus or malaware etc. It appears it might be a malaware problem but even using all the latest Microsoft fixes hasn't helped. We used Vista Business Professional with all the latest service packs updated. We use the latest version of Firefox as of up to around 3 weeks or so ago when this issue first appeared.

I suspect you need more expert help but here are a few things you can try.
If you can't open Firefox(double click on Firefox desktop icon) try Safe Mode - Hold down the Shift Key as you double click on the icon>don't check anything on the page that opens>continue. If Firefox opens and works in this safe mode go to Add-ons> Extensions and look for "Ask". Then look at Add-ons >Plug-ins and again look for "Ask" . Remove, delete,disable any Asks. If you do remove any, close Firefox. And try again in Normal Mode.
The Ask website has detailed instructions for removal but you need to find it on your computer and have your computer in working order.
If there is no sign of Ask and Firefox is working well in Safe Mode you should work your way through this -
https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes
Eventually you might need to grapple with About:Config and even your Windows Registry but I would recommend a complete uninstall and re-install before that. Unfortunately that often doesn't work.
That all sounds very daunting but taken step-by-step you might get lucky early.

Firefox won't shut down. I am running 3.6.8 on a Mac. I haven't had this problem until recently.

Firefox won't shut down properly. I am running 3.6.8 on a Mac and usually I have to force quit to get it to shut down. This has only begun recently. If I knew how to roll back to a previous version I would and save you the trouble, but alas, I do not.

I'm having this same problem. I am going uninstall Firefox and install Google Chrome. This is ridiculous that there is NO solution Mozilla can provide us! I can't shutdown my Mac because Firefox won't shutdown. I got a script error message, tried to STOP or CONTINUE To no avail.

When I try to open Firefox, a pop up says it is already running and I must close a window or restart. I can not figure out how to close the window they are asking me to.

when I try to start Firefox, a pop up says it is already running and I must close a window or restart. I can not figure out what window they want me to close
== This happened ==
Every time Firefox opened
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; MDDC; .NET CLR 3.5.30729; .NET CLR 3.0.30618)

See http://kb.mozillazine.org/Firefox_hangs and [[Firefox hangs]] (Hang at exit)
Check in the Task Manager (XP: Ctrl+Alt+Del, Vista: Shift+Ctrl+ESC, Processes tab) if there are hanging Firefox processes.
If you see any ''firefox.exe'' processes then click the End button to end those Firefox processes.
You can only start Firefox in [[Safe mode]] or launch the [[Managing profiles|Profile Manager]] is all Firefox processes are ended.
See also http://kb.mozillazine.org/Kill_application

I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". What do I need to do

I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". Rebooting my computer didn't help. Since I experienced that problem I also noticed that all my bookmarks which I had copied into the Windows Internet Explorer have also disappeared. I am using Firefox as my primary search engine and usually don't use Internet Explorer. I am running Windows 7 on my machine.

Try this add on [https://addons.mozilla.org/en-US/firefox/addon/open-profile-folder/ Open Profile Folder]

I Close Firefox. When I go back to reopen firefox. I am told it is already running, although there is nothing on my screen??

I Close Firefox. When I go back to reopen firefox. I am told it is already running, although there is nothing on my screen. I have to goto the task manager, to find firefox and shut down the process, in order to open the browser. ? a bit of a pain in the grapes, any suggestions?

Does it also happen if you wait a bit longer (1 or 2 minutes) before reopening Firefox?
Do you see hanging Firefox processes in the Task Manager (Ctrl+Alt+Del) ?
See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

When I try and launch Firefox, I get this error message A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help?

When I try and launch Firefox, I get this error message >A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help? I thought if I were to completely uninstall and re install it might help, but I cannot seem to find instructions to do this....

See [[Firefox is already running but is not responding]], the image shown in that article is the Windows equivalent of the error message that you are receiving, but the information relates to the Mac.

I love firefox 3.08 but when I install any improved versions they will not run on my desktop even when I have disabled all add ons and the firewall, can you help?

my system is Windows XP Media Center 2005 Hp model
I use Avast anti virus but have disabled it when loading firefox
I removed the Mcfee firewall which I thought might have stopped it running
I disabled all the add ons in case that was the problem
The internet explorer which I dont use as a browser has loaded up the inbox which ss very hard to remove
I have tried all the suggestions in the support section without success
please help as the message on the screen reads that the firefox version 3.08 is no longer secure.

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!

I have a Mac running OS X 10.6.8 and have installed all updates and disabled Java Applets. Do I need to put virus protection on this computer and, if so, any recommendations?

I have a Mac running OS X 10.6.8 and have installed all updates and have disabled Java Applets. Do I need to install antivirus software and, if so, do you have a recommendation on what works best.

Mac OS X versions 10.6.7 and later have built-in detection of known Mac malware in downloaded files. The recognition database is automatically updated once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders. In most cases, there’s no benefit from any other automated protection against malware.
The most effective defense against malware is your own intelligence. All known malware that affects a fully-updated installation of Mac OS X 10.6 or later takes the form of trojans, which can only work if the victim is duped into running them. If you're smarter than the malware attacker thinks you are, you won't be duped. That means, primarily, that you never install software from an untrustworthy source. How do you know a source is untrustworthy?
Any website that prompts you to install a “codec,” “plug-in,” or “certificate” that comes from that same site, or an unknown site, merely in order to use the site, is untrustworthy.
A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim.
“Cracked” versions of commercial software downloaded from a bittorrent are likely to be infected.
Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. No intermediary is acceptable.
Disable Java (not JavaScript) in your web browser(s). Few websites have Java content nowadays, so you won’t be missing much. This setting is mandatory in Mac OS X 10.5.8 or earlier, because Java in those versions has bugs that make it unsafe to use on the Internet. Those bugs will probably never be fixed, because those older operating systems are no longer being maintained by Apple. Migrate to a newer version of the Mac OS as soon as you can.
Follow these guidelines, and you’ll be as safe from malware as you can reasonably be.
Never install any commercial "anti-virus" products for the Mac, as they all do more harm than good. If you need to be able to detect Windows malware in your files, use ClamXav — nothing else.

Cannot connect to Itunes, status bar goes about half way and stops. I have tried all the fixes other people have used, no joy. Running Vista with the most recent Itunes installed. Disabled fire wall and anti virus software. Once again, I have tried it all

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Firefox won't run because it 'is already running' I have tried all steps in firefox crashes articles

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