gecko-dev/mobile/android/base/resources/xml/preferences_privacy.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
                  xmlns:gecko="http://schemas.android.com/apk/res-auto"
                  android:title="@string/pref_category_privacy_short"
                  android:enabled="false">

    <ListPreference android:key="privacy.donottrackheader"
                    android:title="@string/pref_donottrack_menu"
                    android:entries="@array/pref_donottrack_entries"
                    android:entryValues="@array/pref_donottrack_values"
                    android:persistent="false" />

    <ListPreference android:key="network.cookie.cookieBehavior"
                    android:title="@string/pref_cookies_menu"
                    android:entries="@array/pref_cookies_entries"
                    android:entryValues="@array/pref_cookies_values"
                    android:persistent="false" />

    <CheckBoxPreference android:key="signon.rememberSignons"
                        android:title="@string/pref_remember_signons"
                        android:defaultValue="true"
                        android:persistent="false" />

    <CheckBoxPreference android:key="privacy.masterpassword.enabled"
                        android:title="@string/pref_use_master_password"
                        android:defaultValue="false"
                        android:persistent="false" />

    <!-- keys prefixed with "android.not_a_preference." are not synced with Gecko -->
    <org.mozilla.gecko.PrivateDataPreference
                        android:key="android.not_a_preference.privacy.clear"
                        android:title="@string/pref_clear_private_data"
                        android:persistent="true"
                        android:positiveButtonText="@string/button_clear_data"
                        gecko:entries="@array/pref_private_data_entries"
                        gecko:entryKeys="@array/pref_private_data_keys"
                        gecko:initialValues="@array/pref_private_data_values" />

</PreferenceScreen>