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<!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc. Note:
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<h1>Formats: Manifest Files</h1>
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<li jsinstance="0">
<a href="#overview"> Field summary </a>
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<li jsinstance="*0" style="display: none; ">
<a>h3Name</a>
</li>
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<a href="#H2-1">Field details</a>
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<li jsinstance="0">
<a href="#description">description</a>
</li><li jsinstance="1">
<a href="#icons">icons</a>
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<a href="#name">name</a>
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<a href="#permissions">permissions</a>
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<a href="#version">version</a>
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<a href="#method-anchor">methodName</a>
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<ol>
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<a href="#event-anchor">eventName</a>
</li>
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<a href="#id-anchor">id</a>
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<div id="static"><div id="pageData-title" class="pageData">Formats: Manifest Files</div>
<div id="pageData-showTOC" class="pageData">true</div>
<p>
Every extension has a
<a href="http://www.json.org">JSON</a>-formatted manifest file,
named <code>manifest.json</code>,
that provides important information about the extension.
</p>
<h2 id="overview"> Field summary </h2>
<p>
The following code shows the supported manifest fields,
with links to the page that discusses each field.
The only fields that are required for every extension
are <b>name</b> and <b>version</b>.
</p>
<pre>{
<em>// Required</em>
"<a href="#name">name</a>": "<em>My Extension</em>",
"<a href="#version">version</a>": "<em>versionString</em>",
<em>// Recommended</em>
"<a href="#description">description</a>": "<em>A plain text description</em>",
"<a href="#icons">icons</a>": { ... },
<em>// Pick one (or none)</em>
"<a href="browserAction.html">brower_action</a>": {...},
"<a href="pageAction.html">page_action</a>": {...},
"<a href="themes.html">theme</a>": {...},
<em>// Add any of these that you need</em>
"<a href="background_pages.html">background_page</a>": "<em>aFile</em>.html",
"<a href="ntp.html">chrome_url_overrides</a>": {...},
"<a href="content_scripts.html">content_scripts</a>": [...],
"<a href="options.html">options_page</a>": "<em>aFile</em>.html",
"<a href="#permissions">permissions</a>": [...],
"<a href="npapi.html">plugins</a>": [...]
"<a href="autoupdate.html">update_url</a>": "http://<em>path/to/updateInfo</em>.xml",
}
</pre>
<a name="H2-1"></a><h2>Field details</h2>
<p>
This section covers fields that aren't described in another page.
For a complete list of fields,
with links to where they're described in detail,
see the <a href="#overview">Field summary</a>.
</p>
<h3 id="description">description</h3>
<p>
A plain text string
(no HTML or other formatting)
that describes the extension.
The description should be suitable for both
the browser's extension management UI
and the extension gallery.
</p>
<h3 id="icons">icons</h3>
<p>
One or more icons that represent the extension.
We recommend that you provide icons in four sizes —
16x16, 32x32, 48x48, and 128x128 pixels.
The icons can be in any format supported by WebKit,
such as BMP, GIF, ICO, JPEG, or PNG.
Here's an example of specifying all four icon sizes:
</p>
<pre>"icons": { "16": "icon16.png",
"32": "icon32.png",
"48": "icon48.png",
"128": "icon128.png" },
</pre>
<h3 id="name">name</h3>
<p>
A short, plain text string
that identifies the extension.
The name is used in the install dialog,
extension management UI,
and the extension gallery.
</p>
<h3 id="permissions">permissions</h3>
<p>
An array of permissions that the extension might use.
Each permission can be either one of a list of known strings
(such as "tabs" or "bookmarks")
or a match pattern
that gives access to one or more hosts.
These permissions are displayed to users before installation.
Permissions might also help to limit damage
if your extension is attacked.
</p>
<p>
If an API requires you to declare a permission in the manifest,
then its documentation tells you how to do so.
For example,
the <a href="tabs.html">Tabs</a> page
shows you how to
declare the "tabs" permission.
</p>
<p>
Here's an example of the permissions part of a manifest file:
</p>
<pre>"permissions": [
"tabs",
"bookmarks",
"http://www.blogger.com/",
"http://*.google.com/"
],
</pre>
<p>
For more information, see
<a href="xhr.html">Cross-Origin XMLHttpRequest</a>,
<a href="windows.html">Windows</a>,
<a href="tabs.html">Tabs</a>, and
<a href="bookmarks.html">Bookmarks</a>.
</p>
<h3 id="version">version</h3>
<p>
One to four dot-separated integers
identifying the version of this extension.
Examples:
</p>
<ul>
<li> <code>"version": "1"</code> </li>
<li> <code>"version": "1.0"</code> </li>
<li> <code>"version": "2.10.2"</code> </li>
<li> <code>"version": "3.1.2.4567"</code> </li>
</ul>
<p>
The autoupdate system compares versions
to determine whether an installed extension
needs to be updated.
If the published extension has a newer version string
than the installed extension,
then the extension is automatically updated.
</p>
<p>
The comparison starts with the leftmost integers.
If those integers are equal,
the integers to the right are compared,
and so on.
For example, 1.2.0 is a newer version than 1.1.9.99999.
</p>
<p>
A missing integer is equal to zero.
For example, 1.1.9.99999 is newer than 1.1.
</p>
<p>
For more information, see
<a href="autoupdate.html">Autoupdating</a>.
</p>
<p class="comment">
[PENDING: Once the gallery is published, point to it
and make a big deal of the fact that autoupdating is free
if you use the gallery.]
</p>
</div>
<!-- API PAGE -->
<div class="apiPage" style="display: none; ">
<a name="apiReference"></a>
<h2>API reference: chrome.apiname </h2>
<!-- PROPERTIES -->
<div class="apiGroup">
<a name="properties"></a>
<h3 id="properties">Properties</h3>
<div>
<a></a>
<h4>getLastError</h4>
<div class="summary">
<!-- Note: intentionally longer 80 columns -->
<span>chrome.extension</span><span>lastError</span>
</div>
<div>
</div>
</div>
</div> <!-- /apiGroup -->
<!-- METHODS -->
<div class="apiGroup" id="methods">
<a name="methods"></a>
<h3>Methods</h3>
<!-- iterates over all functions -->
<div class="apiItem">
<a></a> <!-- method-anchor -->
<h4>method name</h4>
<div class="summary"><span>void</span>
<!-- Note: intentionally longer 80 columns -->
<span>chrome.module.methodName</span>(<span><span>, </span><span></span>
<var><span></span></var></span>)</div>
<div class="description">
<p class="todo">Undocumented.</p>
<p>
A description from the json schema def of the function goes here.
</p>
<!-- PARAMETERS -->
<h4>Parameters</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
<!-- RETURNS -->
<h4>Returns</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
<!-- CALLBACK -->
<div>
<div>
<h4>Callback function</h4>
<p>
If you specify the <em>callback</em> parameter,
it should specify a function that looks like this:
</p>
<!-- Note: intentionally longer 80 columns -->
<pre>function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>);</pre>
<dl>
<div>
<div>
</div>
</div>
</dl>
</div>
</div>
</div> <!-- /description -->
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
<!-- EVENTS -->
<div class="apiGroup">
<a name="events"></a>
<h3 id="events">Events</h3>
<!-- iterates over all events -->
<div class="apiItem">
<a></a>
<h4>event name</h4>
<div class="summary">
<!-- Note: intentionally longer 80 columns -->
<span class="subdued">chrome.bookmarks</span><span>onEvent</span><span class="subdued">.addListener</span>(function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>);
</div>
<div class="description">
<p class="todo">Undocumented.</p>
<p>
A description from the json schema def of the event goes here.
</p>
<!-- PARAMETERS -->
<h4>Parameters</h4>
<dl>
<div>
<div>
</div>
</div>
</dl>
</div> <!-- /decription -->
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
<!-- TYPES -->
<div class="apiGroup">
<a name="types.sort(sortByName)"></a>
<h3 id="types">Types</h3>
<!-- iterates over all types -->
<div class="apiItem">
<a></a>
<h4>type name</h4>
<div>
</div>
</div> <!-- /apiItem -->
</div> <!-- /apiGroup -->
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Except as otherwise <a href="http://code.google.com/policies.html#restrictions">noted</a>,
the content of this page is licensed under the <a rel="license" href="http://creativecommons.org/licenses/by/3.0/">Creative Commons
Attribution 3.0 License</a>, and code samples are licensed under the
<a rel="license" href="http://code.google.com/google_bsd_license.html">BSD License</a>.
</p>
<p>
©2009 Google
</p>
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