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

Sometimes when you try to start firefox, it gives error “Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart the system” and exits. This problem occur generally because of unclean shutdown or power reboots. Whenever we start firefox it creates a lock or .parentlock file in your firefox profile directory(~.mozilla/firefox/profile/.parentlock etc) and because of unclean shutdown not able to delete the file. This problem persists even if you try to reinstall the firefox.
Simple solutions to this problem is remove the lock or .parentlock file :

> rm -rf .mozilla/firefox/lprrz8oe.default/.parentlock or
> rm -rf .mozilla/firefox/lprrz8oe.default/lock

ENJOY BROWSING !!!!!

This entry was posted on Thursday, December 14th, 2006 at 8:06 am and is filed under Linux. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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

  1. PUNEET JAIN says:
    January 6, 2007 at 5:01 am

    I WILL WIN THE PRIZES BY YOURS WEBSITE.

  2. PUNEET JAIN says:
    January 6, 2007 at 5:03 am

    ARE YOU READY FACE ME. PLEASE QUESTION ME.

  3. Virgil says:
    December 24, 2008 at 3:13 pm

    alright everyone i have tried everything possible too get my firefox fixed and can not get it working……..so what i am wondering is if there is anyone who has the TeamViewer program, who could maybe really help me w/my prob? if you could thanx, write me back on yim my name on there’s virgezzy or on my myspace page?

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