I used Computer Associates ver.7.0.0.117 to clear temp files and cache. Firefox won't open a window since though it shows in processes.

System: Toshiba Portege M750, Vista 32-bit SP2,4GB RAM
I've been using Firefox up until last night when I shut down. This morning I did a cache cleaning using CA Internet Security Suite, ver 7.0.0.117. Firefox will not open a window, though it does show in the Processes list of Task Manager.
I've uninstalled and reinstalled ver 6 from the web twice with the same results.
Firefox has had a tendency to hang (never finding a new website, i.e. busy icon revolves endlessly) when left open over several hybernation cycles.

'''Kill Application'''
In Task Manager, does '''firefox.exe''' show in the '''Processes''' tab?
See: '''[http://kb.mozillazine.org/Kill_application Kill Application]'''
'''Causes and solutions for Firefox hanging at exit:'''
'''[[Firefox hangs]]'''
'''[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit (Mozillazine article)]'''
'''[[Firefox is already running but is not responding]]'''
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox SafeMode is a diagnostic mode that disables extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes before starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You have to close and restart Firefox after each change via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

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Updated to 4.0 version and when it loaded I got 4 identical icons on my desktop. I went back in time on my computer and now Firefox won't open.

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Do a clean (re-)install:
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* Firefox 4.0: http://www.mozilla.com/firefox/all.html
* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
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Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.
* http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

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Tina,
I would go crazy if this was me. You may find this interesting from the customer agreement (to see full agreement go here:Customer Agreement | Verizon Wireless):
"HOW AND WHEN CAN I DISPUTE CHARGES?
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''arcandl [[#question-1038482|said]]''
<blockquote>
I'm running Firefox on a Windows 7 machine. Firefox won't open following the latest update. I've read the help articles and it seems like I need to create a new profile because my settings have likely been corrupted. I'm unable to open Profile Mgr, even when using entire directory path in cmd line. I've tried the following commands in the command line:
firefox -p
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</blockquote>
''philipp [[#answer-670108|said]]''
<blockquote>
hello arcandl, when firefox isn't launching after you double-click on the shortcut this is sometimes also a sign of malware being active on a system.
you might want to try running a scan with some different other security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] and [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] which are specialised in removing adware and browser hijackers.
[[Troubleshoot Firefox issues caused by malware]]
</blockquote>
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