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

Firefox crashes immediately when opened - here's info on crash: ID: ac91d5a8-a2ea-4cd9-a1a4-d63c42100628 Signature: wcscpy

more options

Firefox crashes everytime I open it and even when I have used it for a while. Signature: wcscpy Please help as this is frustrating

Crash ID(s)

ID: ac91d5a8-a2ea-4cd9-a1a4-d63c42100628 Signature: wcscpy

Firefox crashes everytime I open it and even when I have used it for a while. Signature: wcscpy Please help as this is frustrating == Crash ID(s) == ID: ac91d5a8-a2ea-4cd9-a1a4-d63c42100628 Signature: wcscpy

All Replies (1)

more options

I downgraded to 3.6.3 and still crashing. Can someone help please!