“Firefox Is Already Running” Error – How to fix it?

The ‘Firefox is already running, but is not responding’, an error has experienced by users at times when they try to access the browser. It occurs while your browser is closed, but it is still functioning in the background, and it can be either in the closing process, or it is frozen and hasn’t quite correctly. Many times, there may be a difficulty with your Firefox profile. If you face this error message, you can fix it with the help of the following tactics.

Hold for a Few Moments

If you have just closed all browser tabs and instantly tried to open a new one, you may face this error because of it is still running in the background. In such a case, you need to wait for a few moments and try to launch your browser again, it will run properly.

End Firefox.exe in the Task Manager

If you are still having the same problem, the browser may be frozen up. In such a situation, you can fix this error with the use of Task Manager.

1. At first, open up the Task Manager by hitting the Ctrl+Shift+Escape at the same time. You can click on the taskbar right side and choose the Task Manager as well.
2. Now, you need to click on the ‘Processes’ tab, because it doesn’t show the list of running applications.
3. Enter the letter f and it will direct you to the firefox.exe process. You can also choose the ‘Image Name’ header to arrange the process list alphabetically and search the firefox.exe.
4. Once you have found firefox.exe, choose it and hit the ‘End Process’ button. Confirm the process and the browser will be stop unceremoniously. Now, you can restart Firefox.

Restart Your Computer

Although this is the quite frankly and nuclear option for the less-experienced users that cannot deal with the Task Manager, but it is not a good idea. This method works because it stops all the system’s processes, including firefox.exe.

Remove the Profile Lock

If the error is still persisting with your browser, even after rebooting your PC and following everything above, there is the possibility of your browser profile is ‘locked.’  Sometimes, Firefox might have omitted behind the lock file while it quit abnormally or crashed. You can clear such lock file on your own; just make sure that browser is not running, otherwise, it may corrupt your profile.

1. At first, open up your browser profile folder. Hit the Windows Key+R simultaneously, copy and paste the %appdata%MozillaFirefoxProfiles line into the box and hit Enter.
2. Hit on the profile folder ending in .default, twice. The profile includes a random prefix name on each PC, but it ends in .default always.
3. Search the parent. Lock file and remove it. Now, you can run your browser properly. If you are having Mac OS, then remove the .parent lock file located in your profile directory. For Linux users, remove the .parent lock files.

Following the above listed methods should resolve the huge amount of ‘Firefox is already running’ errors. If you are still suffering from the same trouble, consult with the skilled professionals by dialing the Mozilla Firefox support service number. You can also visit the Contactforhelp to locate the alternate phone number, in case the contact number you have already dialed is not giving any response.