I get an error message saying firefox is still running ut even after I reboot,same thing happens

Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

Probably a "hung" firefox.exe process.
[https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it Firefox hangs when you close it]

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Everytime I try to open Firefox i get an error message saying "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system."

I have restarted my computer and uninstalled and re-installed firefox and it still doesnt work. i also had a trojan virus when firefox stopped working

Do you have a profile lock file in your profile folder? If so, delete it and see if TB runs properly:
http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

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]].

HT2558 I'm trying to run Sibelius 6. it won't run and I get an error message saying I need to run as an administrator first.How do I run as administrator?

I've just installed Sibelius 6. However, It won't open and I get an error message saying I need to run as administrator first. How do I don this?

Hi Caroline,
Is this on an iPad or a Mac???

I try to open Firefox. Get error message saying Firefox is already running and needs to close - another error message say Firefox can't open

Turned on laptop (rebooted) after being away from it for a few hours. Went to open my home page. Error message popped up saying Firefox is already running and must be closed. I closed it and another error message popped up saying Firefox can't open - incomplete or missing files.
I went into Processes to close Firefox. Selected 'end process' but nothing happened.
Tried to use Internet Explorer but it just gets hung up. Cannot access anything.
And, because I can't open Firefox, I can't go a refresh.
Everything was working just fine a few hours ago.
Any thoughts?

What is the computer system and Firefox on the bad computer?
Separate Issue;
Your System Details on this computer shows;
Multiple versions of your Adobe programs.
Having more than one version of a program may cause issues.
Go to '''adobe.com''' and download the full installers after removing
all of the old programs.
Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift><br> ''(Mac Options)'' ''' key, and then starting Firefox. Is the problem still there?
This is not a cure but will make it easier if Firefox locks up in Windows.
'''https://support.mozilla.org/questions/997866''' {web link}

I run mac os 10.4.11 and firefox 7 will not open, and I get an error message saying firefox is not supported on this version of mac os. is there a different version I can download? Am I missing something?

firefox used to work no problem, I updated firefox a few month ago, now firefox will not open and I get the error message as above

As of Firefox 4.0 and newer one needs both OSX 10.5+ and a Intel Mac.
The last version to work on a Intel Mac using OSX 10.4.* is Firefox 3.6.*
http://www.mozilla.org/en-US/firefox/all-older.html
http://www.mozilla.org/en-US/firefox/7.0/system-requirements/
http://www.mozilla.org/en-US/firefox/4.0/system-requirements/
http://www.mozilla.org/en-US/firefox/3.6/system-requirements/

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]]

Since installing 3.6.12, firefox crashes continuously...I have gone back to Windows Explorer because firefox does not run anymore. Upon any actioin in firefox, the screen goes white and freezes and I get an error message saying firefox has stopped working

just about any action in firefox will cause a "WHITE SCREEN" freeze up and then an error message stating that firefox has stopped working. This happens in EVERY sessioin of firefox.

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

Hi I am having problems downloading and updating apps on my iPad and iPhone. The message cycles between waiting and loading then I get an error message saying unable to download app. Eventually,after many attempts it works.

Hi Guys - for a few days I have been having problems downloading and updating apps on my iPad and iPhone. The message cycles between waiting and downloading then eventually says unable to download app. Sometimes after many attempts it wil eventually work. I tested it on an old iPhone 3G and got the same problem so it is not an iOS 5 issue. My WI-FI connection is working fine. I was wondering if this is an App Store problem? Anyone else in the UK having this problem?

Hi John
iTunes Support wasn't of any use to me.
I have also been having another problem - with BBC iPlayer and other video streaming not working due to insufficient bandwidth, despite my overall download speed being consistently around 50Gb. This is also affecting AppleTV downloads
I am using Virgin Media as my ISP, and was wondering whether you do as well. This might be the common thread.
-Bernard

I am using a macbook leopard why can't i bring songs from my playlist to my ipod i get an error message saying ipod can't be synced disk not found this just started happening

i am using a macBook Leopard and suddenly I can no longer ring my songs from my playlists to my ipods. I keep getting the message Ipod can't by syncd disk cannot be found. this has never happened before and I have 4 ipods that cannot be upedated or changed.

This happens with ALL of your iPods? So, it's probably not a problem on the iPod side of the connection.
If you have not recently (at least since this problem occurred), be sure to restart your Mac. At the same time, you can also Reset your iPod
http://support.apple.com/kb/HT1320
A Reset just restarts the iPod (it is not a Restore). Then try it again.
If that does not help, select the iPod in the iTunes sidebar, under DEVICES. Over to the right, on the Summary tab, if Enable Disk Mode is currently NOT checked, see if checking it and clicking Apply makes any difference. This is more of a test. If that setting makes a difference, it may provide a clue for the actual cause.

How do you stop Firefox from suddenly getting an error message saying tabs are still open when opening the browser??

We have a MAC OS X 10.6.8 and all of the sudden when we close out of Mozilla (both by using the red x and also using "quit") the next time we open Mozilla it has a "well this is embarrassing" Error screen and asks us if we want to re-open our last session. Then it will have whatever email, webpage, fb page, etc that we were on and we can either close it or reopen it.
This started last week, we have had the computer 2 years and have never had this problem before. I tried re-starting Mozilla and after a few hours it started doing it again.

hello, this should be addressed in a later version of firefox. as a workaround in the meanwhile you could try this: enter '''about:config''' into the firefox location bar (confirm the info message in case it shows up) & search for the preference named '''browser.sessionstore.resume_from_crash'''. double-click it and change its value to '''false'''.

TS1363 When I try to sync my ipad I am now getting an error message saying "You do not have sufficient privileges for this operation". Been happening since I upgraded to the latest IOS on the Ipad and latest itunes. How can I resolve this?

What can I do to resolve this annoying problem?
Vince

Tom:
I finally backed up the iPad to the laptop and deleted everything on the iPad and restored from back up. That cured the problem.
Regards,
Cenzo

I uninstalled Firefox once, reinstalled it and it ran. I had a problem so I did it again. Now it will not run and I get an error message saying that firefox is running and you can only run one at a time. I can't figure out what is running.

Because of a problem, I uninstalled Firefox once, reinstalled it and it ran. I had a problem so I uninstalled/reinstalled it again. Now it will not run. I get an error message saying that firefox is running and you can only run one at a time. I have uninstalled multiple times and can't figure out what is running. The is only one Firefox installed and it is not open. What does this mean and how do I fix it?

If you use ZoneAlarm Extreme Security then try to disable Virtualization.
*http://kb.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
See also:
*[[/questions/880050]]

When I try to download and open Firefox with OS 10.6.3 I get an error message saying "A copy of Firefox is already open" -- and it's not.

I have a new MacBook Pro running OS 10.6.3. Every time I download Firefox and try to open it, I get an error message saying, "A copy of Firefox is already open." And it's not.
== This happened ==
Just once or twice
== I bought my new computer. ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7

Bonjour,
Je ne peux pas ouvrir Firefox. Voici le message que je reçois : " Firefox est déjà en cours d'exécution mais ne répond pas. Pour ouvrir une nouvelle fenêtre, vous devez d'abord arrêter le processus Firefox existant ou redémarrer votre système." Je ne vois pas de processus existant.
Si je me sers de copie de documents PDF et qu'il y a des liens dans le document, les liens ne fonctionnent pas.
Armande

I'm getting an error message from Firefox that says, "Something is trying to trick Firefox into accepting an insecure update. Please contact your network provider and seek help."

I'm getting an error message from Firefox that says, "Something is trying to trick Firefox into accepting an insecure update. Please contact your network provider and seek help." Do you know what is going on here--what this problem could be? (I do have the latest Firefox version already installed. I have previously received Firefox error messages that say "Firefox Update Failed." However, I already had the latest Firefox version installed when I received those error messages.)

Apparently this occurs when Firefox has problems with security certificates. There have been a few questions about this. I will try to get advice about this.
Apparently you are using Internet Explorer 9 (From your system details). Do you have Google Updater plugin installed on Firefox ?
(That been implicated in this sort of problem by one poster, and some users with the problem do have Google Updater, but some do not)

I get an error message saying firefox is still running ut even after I reboot,same thing happens

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