Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Firefox will not open at all, and wen I try to uninstall it tell me that Firefox must be closed to proceed with te uninstall even though it is not open.

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

shiyaz
shiyaz
more options

Firefox will not open at all, and wen I try to uninstall it tell me that Firefox must be closed to proceed with te uninstall even though it is not open.

Firefox will not open at all, and wen I try to uninstall it tell me that Firefox must be closed to proceed with te uninstall even though it is not open.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.

Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.