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.

Xpcom error

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

Steve Matuszak
Steve Matuszak
more options

I've deleted and reload Firefox several times in an attempt to resolve this issue as suggested in response to the various users with the same problem. I'm running Windows 11 Pro 22H2 I've tried it with and without my security programs running. Unless you've got something else to try, I'll have to switch to a different browser.

I've deleted and reload Firefox several times in an attempt to resolve this issue as suggested in response to the various users with the same problem. I'm running Windows 11 Pro 22H2 I've tried it with and without my security programs running. Unless you've got something else to try, I'll have to switch to a different browser.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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.