Remove .html extension from links

chrome/common/extensions/docs/templates/intros/storage.html

 <h2 id="overview">Overview</h2>
 
 <p>
 This API has been optimized
 to meet the specific storage needs of extensions.
 It provides the same storage capabilities as the
 <a href="https://developer.mozilla.org/en/DOM/Storage#localStorage">localStorage API</a>
 with the following key differences:
 </p>
 
 <ul>
   <li>User data can be automatically synced with Chrome sync
   (using <code>storage.sync</code>).</li>
   <li>Your {{platform}}'s content scripts can directly access user data
   without the need for a background page.</li>
   <li>A user's extension settings can be persisted
   even when using
-  <a href="manifest/incognito.html">split incognito behavior</a>.</li>
+  <a href="manifest/incognito">split incognito behavior</a>.</li>
   <li>It's asynchronous with bulk read and write operations, and therefore
   faster than the blocking and serial <code>localStorage API</code>.
   <li>User data can be stored as objects
   (the <code>localStorage API</code> stores data in strings).</li>
   <li>Enterprise policies configured by the administrator for the extension
   can be read (using <code>storage.managed</code> with a
-  <a href="manifest/storage.html">schema</a>).</li>
+  <a href="manifest/storage">schema</a>).</li>
 </ul>
 
 <h2 id="manifest">Manifest</h2>
 <p>You must declare the "storage" permission in the <a
-  href="manifest.html">extension manifest</a>
+  href="manifest">extension manifest</a>
   to use the storage API.
   For example:</p>
 <pre data-filename="manifest.json">
 {
   "name": "My extension",
   ...
   <b>"permissions": [
     "storage"
   ]</b>,
   ...
@@ skipping 96 matching lines @@
     var storageChange = changes[key];
     console.log('Storage key "%s" in namespace "%s" changed. ' +
                 'Old value was "%s", new value is "%s".',
                 key,
                 namespace,
                 storageChange.oldValue,
                 storageChange.newValue);
   }
 });
 </pre>