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  
vCard Format Specification IETF RFC RFC 6350

Browser compatibility

Supported in Firefox Mobile 18 and Firefox OS 1.1.

See also