firefox is not responding -

I turned off the firefox window. When I wanted to open the error, it came out.

You can not open because Firefox has already been opened but it is not responding. Please close Firefox or restart your system.

I have searched for solutions on the Internet Most people say that Firefox is using the task manager. Then I opened Task Manager but there is no Firefox process, so how can I stop it? How do I restart?

Try it:

Your Firefox may be locked out already Without deleting the file

1. Restart your computer. After restarting it, do not try to start Firefox.
2. Go to your Firefox profile folder
3. Delete the lock file
4. If you remove the Parent.lock file and get the error, click " Can not remove parent: file or directory is corrupt and unreadable ", restart the computer and run the error-checking tool Chkdsk (Windows 2000, XP) or ScanDisk (Windows 98, ME). )

   Or the following should also work as follows:

   1. Start the task manager.
   2. Select the Process tab.
   3. Select the entry for firefox.exe and click on the end process.
   4. Click the Yes in the "Task Manager Alert" dialog that appears.
   5. To repeat any additional Firefox, repeat the above steps .exe Processes, if more than one entry is received, exit the Windows Task Manager.
   6. Normally start Firefox.

      Hope it helps.

      References: -