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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Can't open Firefox, tried to re-install and was told to close before installing

sandy brown
sandy brown
more options

Apparently Firefox things it is open on my computer, but it won't open, and when I try to re-install it continues to tell me it is open and must be closed before re-installing.

Apparently Firefox things it is open on my computer, but it won't open, and when I try to re-install it continues to tell me it is open and must be closed before re-installing.

All Replies (2)

Scribe
Scribe
more options

Hi, see if it is running in the Task Manager - Ctrl+Shift+Esc > Applications tab, if it is, select it and click End Task.

Hope that will help.

iamjayakumars
iamjayakumars
more options

The problem may the firefox.exe is running in background.

________________________________________________________________________________________

Create a new profile as a test to check if your current profile is causing the problems.
See Creating a profile:

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem
Profile Backup and Restore

Modified by iamjayakumars