chrome/common/extensions/docs/static/experimental.html

<div id="pageData-name" class="pageData">chrome.experimental.* APIs</div>

<p>
We'd like your <a href="http://groups.google.com/a/chromium.org/group/chromium-extensions/topics">feedback</a>
on the following experimental APIs:
</p>

<ul>
  <li jsselect="experimentalAPIs();">
  <a jsvalues=".href: $this + '.html'" jscontent="$this"></a></li>
</ul>

<p class="caution">
<b>Caution:</b>
Don't depend on these experimental APIs.
They might disappear,
and they <em>will</em> change.
Also, the extension gallery doesn't allow you to
upload extensions that use experimental APIs.
</p>

<h2 id="using">How to use experimental APIs</h2>

<ol>
  <li>
    Make sure you're using the
<a href="http://www.chromium.org/getting-involved/dev-channel">Dev channel</a>
    of Google Chrome.
    Although the experimental APIs might work in other versions,
    we need your feedback on the latest incarnation of the APIs,
    which you can find on the Dev channel.
  </li>
  <li>
    Using the
    <a href="http://code.google.com/chrome/extensions/dev/experimental.html">API documentation for the Dev channel</a>,
    write the code for your extension.
  </li>
  <li>
    Specify the "experimental"
    <a href="manifest.html#permissions">permission</a>
    in your extension's manifest, like this:
<pre>
"permissions": [
  <b>"experimental"</b>,
  ...
],
</pre>
  </li>
  <li>
    Specify the <b>--enable-experimental-extension-apis</b> flag
    when you launch the browser.
    On Windows, you can do this by modifying
    the properties of the shortcut that you use to launch Google Chrome.
    For example:

<pre>
<em>path_to_chrome.exe</em> <b>--enable-experimental-extension-apis</b></pre>
  </li>

  <li>
    <a href="http://groups.google.com/a/chromium.org/group/chromium-extensions/topics">Give us feedback!</a>
    Your comments and suggestions help us
    improve the APIs and decide
    which ones should move from experimental to supported.
  </li>
</ol>

<h2 id="other">More information</h2>

<p>
For information on the standard APIs that extensions can use, see
<a href="api_index.html">chrome.* APIs</a> and
<a href="api_other.html">Other APIs</a>.
</p>