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.

Rohkem teavet

The operation can’t be completed because the item “toolkit.jar” is in use.

  • 1 vastus
  • 27 on selline probleem
  • 1 view
  • Viimati vastas cor-el

more options

Trying to install Firefox 4 on my aluminum MacBook, and I get the following error message:

"The operation can’t be completed because the item “toolkit.jar” is in use."

I shut down all other programs, emptied my trash, still the same message.

Trying to install Firefox 4 on my aluminum MacBook, and I get the following error message: "The operation can’t be completed because the item “toolkit.jar” is in use." I shut down all other programs, emptied my trash, still the same message.

All Replies (1)

more options
  • Download a new copy of the Firefox program: http://www.mozilla.com/firefox/all.html
  • 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.