Upon searching as requested I have found a Hack for diableing Ajax error reporting,
which I am unwilling to do, and a suggested fix by Abolabo
replacing public_html/storefront/view/default_html5/javascript/common.js
This fix does NOT fix the issue.
I can confirm however, it is only happening in Firefox??? Not in IE or Chrome ?
So I am less worried about it now but still curious.
Thanks...