This API is available on Firefox OS for internal applications only.


This method fetches the value of a specified setting.

This method is asynchronous and returns a DOMRequest object, which you use to determine when the request has been completed so that you may act on the results.




The string name of the setting whose value you wish to retreive. The exact list of possible strings is device dependent. Each Gaia build can have its own list of settings. For an up-to-date list of those strings, take a look at the Gaia source code.


This example checks to see if WiFi is enabled and reports the result.

var lock = navigator.mozSettings.createLock();
var req  = lock.get('wifi.enabled');

req.onsuccess = function () {
  console.log('wifi.enabled: ' + req.result['wifi.enabled']);

req.onerror = function () {
  console.log('An error occured: ' + req.error);


Not part of any specification yet; however, this API will be discuss at W3C as part of the System Applications Working Group.

See also

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 Contributors to this page: chrisdavidmills, teoli, MHasan, mcav, kscarfone, Sheppy, janjongboom, Jeremie
 Last updated by: chrisdavidmills,