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.

I uninstalled Firefox and now am trying to reinstall and i get this error msg "couldn't load XPCOM.

  • 1 reply
  • 3 have this problem
  • 7 views
  • Last reply by cor-el

mmce32200
mmce32200
more options

I uninstalled Mozilla so I could use Internet explorer for a work project. I was unable to access the internet w/IE so I tried to reinstall Mozilla. When I click on the icon I get "couldn't load XPCOM. Some of the other suggestions were to copy the download on this second computer, save to flash drive and then add to pc. How do I download mozilla to a flash drive? Or how can I access the internet if I can't use Mozilla or IE?

I uninstalled Mozilla so I could use Internet explorer for a work project. I was unable to access the internet w/IE so I tried to reinstall Mozilla. When I click on the icon I get "couldn't load XPCOM. Some of the other suggestions were to copy the download on this second computer, save to flash drive and then add to pc. How do I download mozilla to a flash drive? Or how can I access the internet if I can't use Mozilla or IE?

All Replies (1)

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

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

Download a fresh Firefox copy and save the file to the desktop.

Uninstall your current Firefox version, if possible, to cleanup the Windows registry and settings in security software.

  • Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.

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

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.