This API is available on Firefox OS for privileged or certified applications only.


The getRevision method is used to retrieve the revision number of the device's contact database.


var instanceOfDomRequest = window.navigator.mozContacts.getRevision();

Return value

A DOMRequest object to handle the success or error of the operation.


var request = window.navigator.mozContacts.getRevision();

request.onsuccess = function () {
  console.log('Database version is: ' + this.result);

request.onerror = function () {
  console.log('Something goes wrong!');


Specification Status Comment
Contacts Manager API
The definition of 'Contacts Manager API' in that specification.
Working Draft Ā 
vCard Format Specification IETF RFC RFC 6350

Browser compatibility

Supported in Firefox Mobile 18 and Firefox OS 1.1.

See also