I can no longer open firefox. I get a message that it is already open but when I try to force quit the app it is not there.

I am running IMacs with an OS10.6x operating system. This problem has occurred on several of my machines now. I can still open firefox from alternate profiles on the same machine, but the student profile will give me the message that it is already open and can only have one instance running at a time.

Make sure that the profile that Firefox wants to use and that is specified in profiles.ini still exists. If that profile isn't found then you get that same error message.
See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use

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When I try to open Firefox, I get a message that one is already open, though I'm not able to access it. How can I eliminate the invisible version?

I've been having problems with pdf and Firefox on my iMac. In the absence of being able to find an 'uninstall' function (and reinstall with a newer version), I deleted Firefox by dragging the application item to the trash and deleting. Then I downloaded a new Firefox version 5. But, when I try to open it, the above message comes up. This happens even if I shut down and restart. what do I need to do?

I have tried everything I could to fix this, but some things require actually being on Firefox, and since I cannot get on, I cannot click on the tabs to do it. I have even totally uninstalled firefox, and that has not fixed this. I still get the same message that firefox is running and I need to close it or restart (which I have also tried dozens of times). I have removed things like Java, and that has not helped either. If I cannot even get on line in firefox, how can I fix this. I am not crazy about using internet explorer, but right now, it is my only option. I even tried to start in safe mode, and the same message box pops up!

When I try to start Firefox, I get a message that it is already running but not responding and I can't run another Firefox at the same time. I uninstalled and reinstalled. No change. Tried various other suggestions. Help!!

When I try to start Firefox, I get a message that it is already running, but not responding and that I should close it before trying to run another Firefox. But I cannot find a way to close Firefox program that is not running as far as I can see. I tried uninstalling and reinstalling Firefox, but that did not work. I've tried various other things, but no luck. I thought programs should stop when the computer is turned off, but that didn't work either.

How are you opening the Profile Manager?
*http://kb.mozillazine.org/Profile_Manager
Sounds that Firefox is still or already running. 
See:
*http://kb.mozillazine.org/Kill_application

When I try to open Firefox I get a message saying it is already open. However it is not open and i cannot access Firefox

When I try to open Firefox I get a message saying it is already open. However it is not open and i cannot access Firefox

See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding
If it happens after you've closed Firefox and want to restart the see these:
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
See "Firefox hangs when you quit it":
*https://support.mozilla.com/kb/Firefox+hangs

When I open firefox I get a message that "A copy of Firefox is already open. Only one copy of Firefox can be open at a time"

When I open firefox I get a message that "A copy of Firefox is already open. Only one copy of Firefox can be open at a time" Nothing I have tried fixes the problem

See http://kb.mozillazine.org/Profile_in_use

Every time I try to open Firefox I get a popup saying it is already open, and to close it or restart; but it is NOT open, and restarting doesn't help.

<blockquote>Locking duplicate thread. 
Please continue here: [[/questions/880054]]</blockquote>
Question
Every time I try to open Firefox I get a popup saying it is already open, and to close it or restart; but it is NOT open, and restarting doesn't he

Duplicate Thread LOCK please
* Continue here - https://support.mozilla.com/en-US/questions/880054

I have a macbook pro, when I try to open excel it will not open and I get a messages that states "cannot be opened 1712

I have a macbook pro, when I try to open excel it will not open and I get a messages that states "cannot be opened 1712.

What version Mac OS X?
What version Excel?

When I try opening iPhoto on my iMac (OSX 10.9.2) it says I must first update the application; when I try doing so from the App store, it says there are no updates available. I have not renamed or moved iPhoto which was preinstalled. How to solve?

When I try opening iPhoto on my iMac (OSX 10.9.2) it says I must first download the update; when I try doing so from the App store, it says there are no updates available. Stuck in a classis Catch-22 - any ideas how I might solve the problem?

Thanks a lot for your swift response. And sorry if it was a bit too hectic to go through my detailed query (which I did because it was misunderstood when I asked previously). As I've mentioned above, I was informed that updating to 5.0.1 would '''require''' me to '''delete''' the current version and then install the new one. And doing so will involve losing all my bookmarks. I guess I should have been more specific and detailed there. By losing, I didn't mean losing them forever. I'm aware that they're secured in some place and deleting and installing the software doesn't harm its existence. What I meant that if I install the new version, I'd have to delete the old one. And after installing the new version, I'd have to transfer them (bookmarks) back from wherever they are. Get it? When it updated from 3.6.9 to 3.6.13, and from 3.6.13 to 3.6.18, I didn't need to follow that process. They were already present on their own.
BTW, I'm having no problems with 3.6.18 but after learning about the existence of version 5.0.1, I'm a bit too eager to lay my hands over it.
Thanks for your help; hope this wasn't extremely long.

I get a message that says cannot connect to iTunes when I try to update apps. I am connected to wifi. I have changed password. I have turned off iPad and back on. I have tried scearching for the answer and cannot find any help.

I get a message that says cannot connect to iTunes when I try to update apps. I have tried everything. What to do?

Apple appears to be having trouble with the iTunes Store servers right now. Wait for them to fix it.
(81086)

HT4623 Why do I get a message that says change uk to us when I try updating apps. I am in the us

Why do I get a message that says change uk to us when I try updating apps. I am in the us

Settings > iTunes & App Stores > Apple ID: > View Apple ID > Country/Region...make sure it's the US store.

When I open Firefox I get a message that says I am working offline. I have tried reinstalling, but no help. Other acounts on this computer can get to Firefox, but not me. What's wrong?

I upgraded to the newest version of Firefox yesterday. But now I cannot get online with Firefox. I can check my e-mail and browse the web on Internet Explorer, but not Firefox. I get a message that says Firefox is working offline. I uninstalled and reinstalled Firefox, but that did not help. I restored my computer to Sunday's settings, but that did not help.

I have tried everything I could to fix this, but some things require actually being on Firefox, and since I cannot get on, I cannot click on the tabs to do it. I have even totally uninstalled firefox, and that has not fixed this. I still get the same message that firefox is running and I need to close it or restart (which I have also tried dozens of times). I have removed things like Java, and that has not helped either. If I cannot even get on line in firefox, how can I fix this. I am not crazy about using internet explorer, but right now, it is my only option. I even tried to start in safe mode, and the same message box pops up!

When I go to open Itunes I get a message that says "Itunes has detected a problem with your audio configuration. Audio/Video playback may not operate properly.

When I go to open Itunes, I get a message saying "Itunes has detected a problem with your audio configuration. Audio/Video playback may not work properly. I've tried closing and re-opening Itunes but it still comes up. I've also tried removing quicktime, repairing Itunes and restarting my computer after that. It still says the same thing. I've also tried reinstalling Itunes as well.

Hi Ganeshpandianm,
Welcome to the Support Communities!
The article below may be able to help you with this issue.
Click on the link to see more details and screenshots.
iTunes for Windows: iTunes cannot run because it detects an issue with QuickTime
http://support.apple.com/kb/TS1371?viewlocale=en_US
"iTunes cannot run because it has detected a problem with your audio configuration"
Cheers,
- Judy

When I try to open firefox, I get a message that says, "firefox is already running" and to close it or restart my computer when it is NOT running, so I can't get on the internet through firefox. What is wrong?

The information box pops up when I click on my desktop icon for firefox as well as if I try to access it in other ways. I have restarted my computer. I have tried removing firefox and redownloading it. No matter what I do, it still gives me a box saying it is already running, but not responding. When I pull up my taks bar, it is not running! I can't close it as the box suggests because it is not open to do it. I just keep getting a box saying it is already running no matter what I try to do, even though it is not running.

I have tried everything I could to fix this, but some things require actually being on Firefox, and since I cannot get on, I cannot click on the tabs to do it. I have even totally uninstalled firefox, and that has not fixed this. I still get the same message that firefox is running and I need to close it or restart (which I have also tried dozens of times). I have removed things like Java, and that has not helped either. If I cannot even get on line in firefox, how can I fix this. I am not crazy about using internet explorer, but right now, it is my only option. I even tried to start in safe mode, and the same message box pops up!

When i try to open firefox i get a message that says Windows has encountered a problem and will notify when there is a solution. Then you can click on the explanation and it says DEP will not allow it to open. Can you tell me how to fix this?

I was able to install and have an icon on my desktop. When i click on it it automatically pops a box up that says: Firefox has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. Then it highlights an icon at the bottom to show what the problem is and it is DEP (data execution prevention. I tried a few suggestions there but it didn't work. So it said to see if there is a download version compatable with DEP

See:
* https://support.mozilla.com/en-US/kb/Firefox%20crashes%20when%20you%20open%20it

When I open Firefox, I get a message that says "Your profile cannot be loaded. It may be missing inassable." Help

I need help...I can't open firfox :( I have uninstalled it, I have re-installed and it won't work :( I have looked up trouble shooting. I keep getting this message "Your profile cannot be loaded. It may be missing inassable." I have done this twice.

You profile folder is damaged or missing. 
To fix this, we will need to delete the profile by following these steps:
#Go to the Firefox application data
#Select the Profiles folder
#Delete the folder with <code>.default</code> at the end of the name
Please report back with your results.
WARNING: Removing folders/files can cause damage to other programs and the Windows operating system. use caution when manually deleting folders/files. Creating a backup of any deleted files is highly recommended!

I can no longer open firefox. I get a message that it is already open but when I try to force quit the app it is not there.

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