This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

firefox is already running but its not

  • 4 பதிலளிப்புகள்
  • 10 இந்த பிரச்னைகள் உள்ளது
  • 1 view
  • Last reply by cltutwiler

I booted my computer and tried to open firefox but a windows pops up and say Firefox is already running, but not responding. To open a new window you must close and existing windows and try again.

The problem is it isn't running. I open my task manager and there is no programs running, I check running processes and nothing to do with Mozilla firefox is in there. How can it already be running if it isn't open?

I booted my computer and tried to open firefox but a windows pops up and say Firefox is already running, but not responding. To open a new window you must close and existing windows and try again. The problem is it isn't running. I open my task manager and there is no programs running, I check running processes and nothing to do with Mozilla firefox is in there. How can it already be running if it isn't open?

தீர்வு தேர்ந்தெடுக்கப்பட்டது

I actually fixed it. I was looking in c:\users/myname/appdata/local/mozilla/firefox/profiles

I looked in c:\users/myname/appdata/roaming/mozilla/firefox/profiles and found the profile.locked file and deleted it. Works great again.

Read this answer in context 👍 0

All Replies (4)

Did you check the whole list? Sometimes the list is not alphabetical. If you still have trouble, go to Mozilla.org for the full install.

Yes I checked the entire list. I even selected to show processes for all users and there is nothing in there about Mozilla. I uninstalled the program and selected to uninstall preferences and profiles too so there was no trace of Mozilla on my computer. I then reinstalled it and same issue. Not sure what you mean go to mozllia.org for the full install?

I included an image of the error and my open processes. You will see Mozilla firefox in the processes but as soon as I click OK on the error box and the process closes.

Mozilla.org is a link to where Firefox can be downloaded from.

தீர்வு தேர்ந்தெடுக்கப்பட்டது

I actually fixed it. I was looking in c:\users/myname/appdata/local/mozilla/firefox/profiles

I looked in c:\users/myname/appdata/roaming/mozilla/firefox/profiles and found the profile.locked file and deleted it. Works great again.