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+---
+title: Preferences
+slug: Mozilla/Preferences
+tags:
+  - NeedsTranslation
+  - TopicStub
+translation_of: Mozilla/Preferences
+---
+<p>The preference system makes it possible to store data for Mozilla applications using a key/value pairing system. These articles provide information about how to use the preference system.</p>
+<table class="topicpage-table">
+  <tbody>
+    <tr>
+      <td>
+        <h2 class="Documentation" id="Documentation" name="Documentation">Documentation</h2>
+        <dl>
+          <dt><a href="/en-US/docs/Preferences/Preferences_system" title="Preferences/Preferences system">Preferences system</a></dt>
+          <dd>An introduction to using the preference system in Mozilla.</dd>
+          <dt><a href="/en-US/docs/XUL_School/Handling_Preferences" title="XUL School/Handling Preferences">XUL School: Handling preferences</a></dt>
+          <dd>The XUL School tutorial chapter on preferences.</dd>
+          <dt><a href="/en-US/docs/Preferences/Preference_reference" title="Preferences/Preference_reference">Mozilla preference reference</a></dt>
+          <dd>A reference guide to all Mozilla preferences; currently a work in progress.</dd>
+          <dt><a href="/en-US/docs/Preferences/A_brief_guide_to_Mozilla_preferences" title="Preferences/A brief guide to Mozilla preferences">A brief guide to Mozilla preferences</a></dt>
+          <dd>An introductory guide to where preferences are stored and other useful information about the core preference system.</dd>
+          <dt><a href="/en-US/docs/Preferences/Using_preferences_from_application_code" title="Preferences/Using preferences from application code">Using preferences from application code</a> {{gecko_minversion_inline("6.0")}}</dt>
+          <dd>Firefox 6 introduced static functions for accessing preferences efficiently from within application code. This API is not available for add-ons, but if you're working on a Gecko application, this API is the preferred way to access preferences.</dd>
+          <dt><a href="/en-US/docs/Preferences/Mozilla_networking_preferences" title="Preferences/Mozilla networking preferences">Mozilla networking preferences</a></dt>
+          <dd>A guide to key networking-related preferences.</dd>
+          <dt><a href="/en-US/docs/Preferences/Mozilla_preferences_for_uber-geeks" title="Preferences/Mozilla preferences for uber-geeks">Mozilla preferences for uber-geeks</a></dt>
+          <dd>A guide to preferences that only truly elite geeks should play with.</dd>
+        </dl>
+        <p><span class="alllinks"><a href="/en-US/docs/tag/Preferences" title="tag/Preferences">View all pages tagged with "Preferences"...</a></span></p>
+      </td>
+      <td>
+        <h2 class="Community" id="Examples" name="Examples">Examples</h2>
+        <dl>
+          <dt><a href="/en-US/docs/Code_snippets/Preferences" title="Code snippets/Preferences">Code snippets</a></dt>
+          <dd>Preference-related code snippets.</dd>
+          <dt><a href="/en-US/docs/Adding_preferences_to_an_extension" title="Adding preferences to an extension">Adding preferences to an extension</a></dt>
+          <dd>How to add preferences to an existing extension.</dd>
+        </dl>
+        <h2 class="Related_Topics" id="Related_Topics" name="Related_Topics">Related Topics</h2>
+        <ul>
+          <li><a href="/en-US/docs/XUL" title="XUL">XUL</a>, <a href="/en-US/docs/JavaScript" title="JavaScript">JavaScript</a>, <a href="/en-US/docs/XPCOM" title="XPCOM">XPCOM</a>, <a href="/en-US/docs/Extensions" title="Extensions">Extensions</a>, <a href="/en-US/docs/Developer_Guide" title="Developing_Mozilla">Developing Mozilla</a></li>
+        </ul>
+      </td>
+    </tr>
+  </tbody>
+</table>