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

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

Keeps Quitting

more options

HELP!

I need my old Firefox back!

I keep getting this error message and I need all my saved passwords and old accounts.

HELP! I need my old Firefox back! I keep getting this error message and I need all my saved passwords and old accounts.
Bafoto sur écran jointes

All Replies (2)

more options

Did this just start happening out of the blue?

The error "Code signature invalid" sounds like Firefox's program files have somehow become corrupted. Do you want to try to trash Firefox.app and reinstall it? If there are any options to remove data, don't remove it.

more options

I reinstalled it but all my information is gone. And I seem to have two Firefox applications.