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When I try to open Firefox it says it's already running...I tried to uninstall it but it says it's running....but it's not.

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It just won't open when I try to open it...it says it's already running but isn't. I tried to uninstall it but it won't uninstall because it says the program is running.

It just won't open when I try to open it...it says it's already running but isn't. I tried to uninstall it but it won't uninstall because it says the program is running.

Chosen solution

Such issues can also be caused if the profile that is set as the default profile (Default=1) in the profiles.ini is missing.
A possible cause is a reset action that failed somehow to complete and update the profiles.ini file properly.

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Additional System Details

Application

  • User Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 2.0.50727; SLCC2; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)

More Information

I haven't a clue on how to troubleshoot this program. Sorry.

John99
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  • Moderator
701 solutions 9685 answers

Helpful Reply

Probably Firefox is not shutting down properly.You will need to kill any Firefox or plugincontainer process with Task Manager.

Firefox should then start ok. Simply uninstalling & reinstalling Firefox rarely solves problems. If you do reinstall firefox or upgrade it, do NOT use any option to remove personal information, because that will destroy bookmarks, settings and passwords.

Probably Firefox is not shutting down properly.You will need to kill any Firefox or plugincontainer process with Task Manager. Firefox should then start ok. Simply uninstalling & reinstalling Firefox rarely solves problems. If you do reinstall firefox or upgrade it, do NOT use any option to remove personal information, because that will destroy bookmarks, settings and passwords. * See [[Firefox hangs or is not responding - How to fix#w_firefox-hangs-when-you-quit-it]]_firefox-hangs-when-you-quit-it

Question owner

I appreciate the helpful information and I was finally able to uninstall FireFox and reinstall it. Everything's working good now.  :-)

I appreciate the helpful information and I was finally able to uninstall FireFox and reinstall it. Everything's working good now. :-)
John99
  • Top 25 Contributor
  • Moderator
701 solutions 9685 answers

Helpful Reply

Glad it is fixed. Thanks for posting back.

For future reference note

Glad it is fixed. Thanks for posting back. For future reference note * that if a re-install is required, it will often need to be a clean re-install <br /> [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox]]_5-reinstall-firefox ** that involves deleting program files ** but retain the profile, do NOT use options to remove personal data ** it is good practice to backup the profile first <br /> [[Back up and restore information in Firefox profiles]] * Sometimes a Reset works, but that does cause some loss of information.<br /> [[Reset Firefox – easily fix most problems]] <br /> (There are better but more complicated methods suitable for more advanced users )
cor-el
  • Top 10 Contributor
  • Moderator
12497 solutions 115302 answers

Chosen Solution

Such issues can also be caused if the profile that is set as the default profile (Default=1) in the profiles.ini is missing.
A possible cause is a reset action that failed somehow to complete and update the profiles.ini file properly.

Such issues can also be caused if the profile that is set as the default profile (Default=1) in the profiles.ini is missing.<br /> A possible cause is a reset action that failed somehow to complete and update the profiles.ini file properly.<br /> *http://kb.mozillazine.org/profiles.ini_file

Question owner

Thank everyone for their help. The problem is solved and I'm a happy camper.

Thank everyone for their help. The problem is solved and I'm a happy camper.