---
title: devtools.inspectedWindow
slug: Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow
tags:
  - API
  - Add-ons
  - Extensions
  - Reference
  - WebExtensions
  - devtools.inspectedWindow
browser-compat: webextensions.api.devtools.inspectedWindow
---
{{AddonSidebar}}

> **Note:** This page describes the WebExtensions devtools APIs as they exist in Firefox 54. Although the APIs are based on the [Chrome devtools APIs](https://developer.chrome.com/extensions/devtools), there are still many features that are not yet implemented in Firefox, and therefore are not documented here. To see which features are currently missing please see [Limitations of the devtools APIs](/en-US/docs/Mozilla/Add-ons/WebExtensions/Extending_the_developer_tools#limitations_of_the_devtools_apis).

The `devtools.inspectedWindow` API lets a devtools extension interact with the window that the developer tools are attached to.

Like all the `devtools` APIs, this API is only available to code running in the document defined in the [devtools_page](/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/devtools_page) manifest.json key, or in other devtools documents created by the extension (such as the document hosted by a panel the extension created). See [Extending the developer tools](/en-US/docs/Mozilla/Add-ons/WebExtensions/Extending_the_developer_tools) for more.

## Properties

- [`devtools.inspectedWindow.tabId`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/tabId)
  - : The ID of the window that the developer tools are attached to.

## Functions

- [`devtools.inspectedWindow.eval()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/eval)
  - : Evaluate some JavaScript in the target window.
- [`devtools.inspectedWindow.reload()`](/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/reload)
  - : Reload the target window's document.

{{WebExtExamples("h2")}}

## Browser compatibility

{{Compat}}

> **Note:** This API is based on Chromium's [`chrome.devtools.inspectedWindow`](https://developer.chrome.com/extensions/devtools_inspectedWindow) API.
>
> Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

<div class="hidden"><pre>// Copyright 2015 The Chromium Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
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// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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//
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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</pre></div>
