Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

সহায়তা খুঁজুন

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.

আরও জানুন
সংরক্ষণ করা হয়েছে

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

archermjones

Every time I go to open Firefox I get this message: Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

Every time I go to open Firefox I get this message: Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

All Replies (1)

Hi archermjones,

Have you looked at the Knowledge Base article "Firefox is already running but is not responding" error - How to fix? There is a lot of good troubleshooting information in the article.

Hopefully this helps!