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

What does "item XUL is in use" mean and how do I turn it off?

  • 2 cavab
  • 6 have this problem
  • 1 view
  • Last reply by oferzur

more options

It trying to install upgrade, I am asked to replace older item with newer one and I click Replace. Then I get a message "The operations can't be completed because the item "XUL" is in use. What does that mean and how do I proceed?

It trying to install upgrade, I am asked to replace older item with newer one and I click Replace. Then I get a message "The operations can't be completed because the item "XUL" is in use. What does that mean and how do I proceed?

All Replies (2)

more options

If there are problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.

Download a new copy of the Firefox program and save the disk image (dmg) file to the desktop

  • Trash the current Firefox application to do a clean (re-)install
  • Install the new version that you have downloaded

Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data if you uninstall and (re)install Firefox.

more options

I can't trash firefox because I get a message saying that a copy is open. I can't find the open copy. I can't trash firefox.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!