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

I getthe 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. It is NOT open I onlly have one computer

  • 1 reply
  • 2 have this problem
  • 5 views
  • Last reply by John99

more options

I installed FF on my new computer, Windows 7 Toshiba, I get the 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. It is NOT open I only have one computer. I had a computer expert try everything and we cannot get it to open.

I installed FF on my new computer, Windows 7 Toshiba, I get the 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'''. It is NOT open I only have one computer. I had a computer expert try everything and we cannot get it to open.

Chosen solution

Look for the firefox process firefox.exe and kill it with for instance task manager. it is also worth watching for plugincontainer.exe.

The problem and solutions are explained in the articles:

Read this answer in context 👍 0

All Replies (1)

more options

Chosen Solution

Look for the firefox process firefox.exe and kill it with for instance task manager. it is also worth watching for plugincontainer.exe.

The problem and solutions are explained in the articles: