chrome/common/extensions/docs/templates/articles/options.html

<h1>Options</h1>

<p>To allow users to customize the behavior of your extension, you may wish to provide an options page. If you do, a link to it will be provided from the extensions management page at chrome://extensions. Clicking the Options link opens a new tab pointing at your options page.

<h2 id="step_1">Step 1: Declare your options page in the manifest</h2>

<pre>{
  "name": "My extension",
  ...
  <b>"options_page": "options.html"</b>,
  ...
}</pre>


<h2 id="step_2">Step 2: Write your options page</h2>

Here is an example options page:

<pre>// Save this script as `options.js`

// Saves options to localStorage.
function save_options() {
  var select = document.getElementById("color");
  var color = select.children[select.selectedIndex].value;
  localStorage["favorite_color"] = color;

  // Update status to let user know options were saved.
  var status = document.getElementById("status");
  status.innerHTML = "Options Saved.";
  setTimeout(function() {
    status.innerHTML = "";
  }, 750);
}

// Restores select box state to saved value from localStorage.
function restore_options() {
  var favorite = localStorage["favorite_color"];
  if (!favorite) {
    return;
  }
  var select = document.getElementById("color");
  for (var i = 0; i &lt; select.children.length; i++) {
    var child = select.children[i];
    if (child.value == favorite) {
      child.selected = "true";
      break;
    }
  }
}
document.addEventListener('DOMContentLoaded', restore_options);
document.querySelector('#save').addEventListener('click', save_options);
</pre>

<pre>
&lt;html>
&lt;head>&lt;title>My Test Extension Options&lt;/title>&lt;/head>

&lt;body>

Favorite Color:
&lt;select id="color">
 &lt;option value="red">red&lt;/option>
 &lt;option value="green">green&lt;/option>
 &lt;option value="blue">blue&lt;/option>
 &lt;option value="yellow">yellow&lt;/option>
&lt;/select>

&lt;br>
&lt;div id="status">&lt;/div>
&lt;button id="save">Save&lt;/button>
&lt;/body>

&lt;script src="options.js">&lt;/script>

&lt;/html>
</pre>

<h2 id="important_notes">Important notes</h2>
<ul>
<li>We plan on providing some default css styles to encourage a consistent look across different extensions' options pages. You can star <a href="http://crbug.com/25317">crbug.com/25317</a> to be notified of updates.</li>
</ul>