This article is in need of a technical review.
This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
date property provides the date when the data usage statistics chunk was stored.
var date = instanceOfMozNetworkData.date;
A Date object.
Not part of any specification.