Sample code for form history auto complete

add_from_history.js

/*
 * Kosei Moriyama <[email protected]>
 *
 * Sample code for Firefox Extensions.
 * Enable auto complete for certain form from history of inputs.
 */

// Write like this in xul firstly.
// Set "id" and "autocompletesearchparam" attribute for your own.
// <textbox id="my-form" type="autocomplete" autocompletesearch="form-history" autocompletesearchparam="my-form-history"/>

// Then write like this in js file.
// replace "my-form" and "my-form-history" for your value
function addFormHistory() {
  var entry = document.getElementById('my-form').value;
  var formHistory = Components.classes["@mozilla.org/satchel/form-history;1"]
    .getService(Components.interfaces.nsIFormHistory2 || Components.interfaces.nsIFormHistory);
  formHistory.addEntry("my-form-history", entry);
}