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+Utilities
+=========
+
+Various modules provide shared utilities to the other components:
+
+`UrlbarPrefs.jsm <https://searchfox.org/mozilla-central/source/browser/components/urlbar/UrlbarPrefs.jsm>`_
+-------------------------------------------------------------------------------------------------------------
+
+Implements a Map-like storage or urlbar related preferences. The values are kept
+up-to-date.
+
+.. highlight:: JavaScript
+.. code::
+
+ // Always use browser.urlbar. relative branch, except for the preferences in
+ // PREF_OTHER_DEFAULTS.
+ UrlbarPrefs.get("delay"); // Gets value of browser.urlbar.delay.
+
+.. note::
+
+ Newly added preferences should always be properly documented in UrlbarPrefs.
+
+`UrlbarUtils.jsm <https://searchfox.org/mozilla-central/source/browser/components/urlbar/UrlbarUtils.jsm>`_
+-------------------------------------------------------------------------------------------------------------
+
+Includes shared utils and constants shared across all the components.