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---
title: Browser Toolbox
slug: Tools/Browser_Toolbox
translation_of: Tools/Browser_Toolbox
original_slug: Narzędzia/Browser_Toolbox
---
<p>The Browser Toolbox enables you to debug add-ons and the browser's own JavaScript code rather than just web pages like the normal <a href="/en-US/docs/Tools_Toolbox">Toolbox</a>. The Browser Toolbox's context is the whole browser rather than just single page on a single tab.</p>
<p><em>Note: If you want to debug a specific add-on that is restartless or SDK-based then try the <a href="/en-US/Add-ons/Add-on_Debugger">Add-on Debugger</a>. Use the Browser Toolbox for add-ons that are neither.</em></p>
<h2 id="Enabling_the_Browser_Toolbox" style="line-height: 30px; font-size: 2.14285714285714rem;">Enabling the Browser Toolbox </h2>
<div>
<p>The Browser Toolbox is not enabled by default. To enable it you need to check the settings "Enable chrome and addon debugging" and "Enable remote debugging".</p>
<p>To do this, open the Developer Tools <a href="https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox">Toolbox</a>'s <a href="https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Settings">Settings</a>, go to the section "<a href="https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Advanced_settings">Advanced Settings</a>", and check the settings "Enable chrome and addon debugging" and "Enable remote debugging".</p>
</div>
<h2 id="Opening_the_Browser_Toolbox"><span style="font-size: 2.14285714285714rem;">Opening</span> the Browser Toolbox</h2>
<p><span style="line-height: 1.5;">Open the Browser Toolbox through the </span><span style="line-height: 1.5;">menu button </span><img alt="new fx menu" class="wiki-image frameless" src="https://support.cdn.mozilla.net/media/uploads/gallery/images/2014-01-10-13-08-08-f52b8c.png" style="line-height: 1.5;" title=""><span style="line-height: 1.5;"> and the menu items "Developer" then "Browser Toolbox".</span><span style="line-height: 1.5;"> </span></p>
<p><span style="line-height: 1.5;">Click the menu item and you'll be presented with a dialog like this (this can be removed by setting the </span><code style="font-style: normal; line-height: 1.5;">devtools.debugger.prompt-connection</code><span style="line-height: 1.5;"> property to false):</span></p>
<p><img alt="" src="https://mdn.mozillademos.org/files/6663/warning.png" style="width: 554px; height: 243px; display: block; margin-left: auto; margin-right: auto;">Click OK, and the Browser Toolbox will open in its own window:</p>
<p><img alt="" src="https://mdn.mozillademos.org/files/6665/browser-toolbox.png" style="display: block; margin-left: auto; margin-right: auto;">You'll see, and be able to debug, all the JavaScript files loaded by the browser itself and by any add-ons that are running. Altogether you will have access to the following developer tools:</p>
<ul>
<li><a href="/en-US/docs/Tools/Debugger">Debugger</a> (<em>Note: If you want to debug a specific add-on that is restartless or SDK-based then try the <a href="/en-US/Add-ons/Add-on_Debugger">Add-on Debugger</a>.)</em></li>
<li><a href="/en-US/docs/Tools/Browser_Console">Console</a></li>
<li><a href="/en-US/docs/Tools/Style_Editor">Style Editor</a></li>
<li><a href="/en-US/docs/Tools/Profiler">Profiler</a></li>
<li><a href="/en-US/docs/Tools/Network_Monitor">Network Monitor</a></li>
<li><a href="/en-US/docs/Tools/Scratchpad">Scratchpad</a></li>
<li><a href="/en-US/docs/Tools/Page_Inspector">Page Inspector</a></li>
</ul>
<h2 id="Debugging_chrome_and_about_pages">Debugging chrome: and about: pages</h2>
<p>From Firefox 37 onwards, you can debug chrome: and about: pages using the normal <a href="/en-US/docs/Tools/Debugger">Debugger</a>, just as if they were ordinary content pages.</p>
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