Firefox does not open, says it's running when trying to restart, but does not show up

Cannot get Firefox to visibly run. Will not open in safe mode and will not close (says its running when I attempt to shutdown or restart computer. Have uninstalled Firefox and reinstalled 8.0 several times and nothing has changed. Have scanned , defragmented, etc. computer and tried a couple system restores as this once cured similar problem with Firefox several months ago.

Bring up the Windows Task Manager, but look in the "Processes" tab for firefox.exe,
and close it from there, it won't do you any good looking for it in the "Applications"
tab when you don't see it on the system taskbar.
closing Firefox properly, and for when you just want to close and
restarting Firefox immediately, see more information in
: https://support.mozilla.com/questions/866027

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http://www.apple.com/support/ipad/assistant/ipad/
iPad Frozen, not responding, how to fix
http://appletoolbox.com/2012/07/ipad-frozen-not-responding-how-to-fix/
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After adding plug-ins to block ads, my firefox no longer opens--it hangs/freeze--i have tried to restart, even deleted firefox and downloaded a new version--to no avail! please advise--

Last night I aded a few plug-ins to block ads including Google's--after restarting my computer (Mac OS X 10.6.8), my firefox no longer opened, i.e. it hangs/freeze when I open it--I have tried to restart, open in safe mode, even deleted firefox altogether and downloaded a new version, to no avail! Please advise! I have been trying to revive Firefox for hours today--

Hey rumon,
Have you tried starting Firefox in Safe Mode? Hold down "option" while Firefox is starting up. If the crash doesn't happen in Safe Mode, you should read [[Troubleshooting extensions and themes]].
There is also a lot of useful stuff in the [[Firefox crashes]] Knowledge Base article. If you've recently upgraded, you might want to check out [https://support.mozilla.com/en-US/kb/latest-firefox-issues#w_firefox-crashes-when-i-start-it this article] as well.
Hopefully this helps!

When I try to open Firefox, it says it is running in the Task manager, but will not open until the memory has reached about 100,000k. Also, it keeps NOT responding all the time, and freezes up.

I have done everything on the support page. I am running Windows Vista, and I am running Firefox 4.01. I have even tried running in safe mode. I have updated my plugins, and then disabled plugins and extensions.

Hello Pohaku66, any luck if you [https://support.mozilla.org/kb/firefox-already-running-not-responding#w_remove-the-profile-lock-file remove the profile lock file] ?
thank you

Could not write value APSDaemon to \Software\Microsoft\Windows\Current Version\Run when trying to install itunes, could not write value APSDaemon to \Software\Microsoft\Windows\Current Version\Run when trying to install itunes

I treiws upgrading my itunes to the b=newest version and I got the following error:
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Reinstall the system.

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Many thanks.
That suggests that another application has stashed old QuickTime componentry in your system files.
So just in case we'll go looking for older QuickTime componentry in the most common locations for it to be stashed.
First we'll need to change some view settings.
In your Start menu, open Computer.
In your Organise menu, select Folder Options.
In the View tab, make sure that "Show hidden files and folders" is selected, and Hide extensions for known file types is unchecked.
Click OK.
Now in Computer, open your C:\ drive (or whichever drive you have your operating system installed on).
Open the "Windows" folder.
If you have a 32-bit version of Windows, open the "System32" folder.
If you have a 64-bit version of Windows, open the "SysWOW64" folder.
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Hi,
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Solution 1:
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Solution 4:
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I installed 4.0 and now firefox will not open, though it is running, I have uninstalled and re-installed and it still will not open?

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If you use ZoneAlarm Extreme Security then try to disable Virtualization.
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Launch the Console application in any of the following ways:
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☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
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Firefox does not open, says it's running when trying to restart, but does not show up

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