This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Tëj nañu waxtaan wii ba denc ko. Yónneel yeneen laaj soo soxlaa ndimbal.

Thunderbird only gives Close Thunderbird dialog. Why?

vondreele
vondreele
more options

Thunderbird only shows "Close Thunderbird" dialog box -Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system. - Task Manager shows no running Thunderbird process and rebooting system does not clear the error. How do I fix this?

Thunderbird only shows "Close Thunderbird" dialog box -Thunderbird is already running, but is not responding. To open a new window, you must first close the existing Thunderbird process, or restart your system. - Task Manager shows no running Thunderbird process and rebooting system does not clear the error. How do I fix this?

All Replies (1)

iamjayakumars
iamjayakumars
more options

Duplicate thread - https://support.mozilla.org/en-US/questions/1003994