data property returns an arbitrary object representing any data passed with the activity.
var options = instanceOfMozActivityOptions.data
Return an object.
If no data are necessary, this property can be
Web Activities is not part of any specification. However, it has some overlap with the proposed Web Intents specification. Mozilla actually proposed Web Activities as a counter proposal to Web Intents. For more information about this, see discussion on the Web Intents Task Force ML.