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

I can't open Firefox and I can't uninstall it. What do I do?

more options

When I try to open Firefox I get this message: "couldn't load XPCOM." Also I am unable to uninstall Firefox - when I click uninstall nothing happens.

When I try to open Firefox I get this message: "couldn't load XPCOM." Also I am unable to uninstall Firefox - when I click uninstall nothing happens.

All Replies (1)

more options

The solution for this problem is stated here :

https://support.mozilla.org/en-US/questions/1029239
One more here : http://appuals.com/best-fix-couldnt-load-xpcom/