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

Firefox won’t work, message’ Couldn’t load XPCOM

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

more options

On my windows 10 desktop firefox will not work, message ‘Couldn’t load XPCOM’ . How can I get it fixed as I no longer have internet access



/edit: moved thread from Firefox for iOS (for iPhone/iPad) to (desktop) Firefox section.

On my windows 10 desktop firefox will not work, message ‘Couldn’t load XPCOM’ . How can I get it fixed as I no longer have internet access /edit: moved thread from Firefox for iOS (for iPhone/iPad) to (desktop) Firefox section.
Attached screenshots

Modified by James

All Replies (1)

more options

An error message like XPCOM missing or about platform version or entry points not found can happen because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox installation folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists.

Reinstall Firefox: