Moment.js returning NaN in Firefox but not chrome

Try this

console.log(moment().diff(moment("11-10-2013 09:03 AM", "DD-MM-YYYY hh:mm A"), "minute"));

JSFiddle

Date.parse("11/10/2013 09:03 AM") or Date.parse("11 10 2013 09:03 AM") seem to work in firefox. Chrome seems to be more permissible with delimiters, allowing ., -, and even ; but what's standard it'll only be possible to tell by looking at specifications.