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!

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

Couldn't load xpcom

  • 1 phendula
  • 2 inale ngxaki
  • 28 views
  • Impendulo yokugqibela ngu cor-el

more options

I'm getting the error "Couldn't load XPCOM" when I try to start Firefox. This problem only started during the last Microsoft 10 update. I have completely uninstalled, including all folders and even the registry, multiple times. I still get the error. Can someone help?

I'm getting the error "Couldn't load XPCOM" when I try to start Firefox. This problem only started during the last Microsoft 10 update. I have completely uninstalled, including all folders and even the registry, multiple times. I still get the error. Can someone help?

All Replies (1)

more options

An error message about XPCOM missing or about platform version usually happens because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox program 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.