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    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.

    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 First Working Draft (unstable)
    vCard Format Specification RFC RFC6350

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    basic support Not supported Not supported Not supported Not supported Not supported
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    basic support Not supported Not supported 18.0 Not supported Not supported Not supported

    Gecko Note

    As the specification is unstable, the Gecko implementation is completely non-standard.

    See also

    Document Tags and Contributors

    Contributors to this page: kscarfone, jsx, fscholz, Jeremie
    Last updated by: fscholz,