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All company, product and service names used in this website are for identification purposes only. If you know of more steps that would assist to get rid of this error, then do mention them in the comments section below.Īll product names, trademarks and registered trademarks are property of their respective owners. The above steps are tried and tested and can get rid of the error within minutes. However, this error popups up quite unexpectedly. Note: if you get an error message and are not able to delete this file, then restart the computer and before trying to launch the Firefox browser, try and delete the file.įirefox is already running but is not responding – your suggestions.įirefox is a very powerful browser and does not display any errors in operation. Open that folder and search for Parent.lock file and delete it. Locate the folder whose name would end in. The name of these folders would not be in plain English but rather alphanumeric. The above command would open a folder that might contain more than one folder. To unlock the profile and ensure that the browser runs error-free, follow these steps: Method 4: The Mozilla Profile is LockedĪnother reason for this error is that sometimes due to unknown errors the profile which the Mozilla Firefox creates gets locked. Note: If the Read-only is checked marked then Firefox will not be able to write in its folder and you will face the “Firefox is already running but is not responding” Error Message. Locate the Read-Only attribute and make sure it is blank. Select the General tab on the Properties Window. Make a right-click on that folder and select Properties. In the Run Window type the following command line: Press the Windows key on the keyboard and the letter R to open the Run Window. To check the permission status, follow these steps: Sometimes due to a system file error or read/write error, Firefox is not able to create any file as it loses the required permissions. In order to operate seamlessly, Mozilla Firefox creates system files in a profile folder created in the Firefox folder in the Program Files directory on your C drive. Look for any additional Firefox processes running and close them too.Ĭlose the Task Manager and restart Firefox. Locate Firefox or press the letter F to pinpoint the Firefox process. In the Task Manager window, select the Processes tab.
