We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

Firefox will not load

FaceBook
FaceBook
more options

Firefox will not load, get statement

can't load XPCOM.

Firefox will not load, get statement can't load XPCOM.

All Replies (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

Does the error message list some different version numbers?

Generally speaking, the error indicates a missing or incompatible program file, which could indicate that a recent update didn't properly replace all of the old files. You could try the procedure in the XULRunner section of this article:

https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions#w_xulrunner-error