autofill has suddenly started using a Facebook email address
Hello,
I have used autofill for years with no problems on my MBP and desktop. Suddenly it now fills with an @facebook address. This does not appear in my profile in contacts and I have never used it. It has never been in my address profile. Consequently I am unable to delete it.
Why and how has this happened and how do I remove it?
Thanks for any help, kind regards, Sally
MacBook Pro (15-inch Core 2 Duo), OS X Mavericks (10.9.3)