Revision 915401 of Remote Debugging

<p>You can use the <a href="/en-US/docs/Tools">Firefox developer tools</a> on your desktop to debug Web sites and Web apps running in other browsers or runtimes. The other browser might be on the same device as the tools themselves or on a different device, such as a phone connected over USB.</p>
<h2 id="Connecting_the_developer_tools">Connecting the developer tools</h2>
<p>The detailed instructions for connecting the developer tools are specific to the runtime.</p>
<h3 id="Gecko-based_runtimes">Gecko-based runtimes</h3>
<p>In the first place, you can connect the developer tools to Gecko-based runtimes like Firefox Desktop, Firefox for Android, Firefox OS, and Thunderbird.</p>
<dl>
 <dt>
  <a href="/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_Desktop">Firefox Desktop</a></dt>
 <dd>
  <p>Remotely debugging Firefox Desktop describes how to connect to Firefox Desktop.</p>
 </dd>
 <dt>
  <a href="/en-US/docs/Tools/Remote_Debugging/Firefox_for_Android">Firefox for Android (before Firefox 36)</a></dt>
 <dd>
  <p>Remotely debugging Firefox for Android describes how to connect to Firefox on an Android device over USB.</p>
 </dd>
 <dt>
  <a href="/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_for_Android_with_WebIDE">Firefox for Android (Firefox 36+)</a></dt>
 <dd>
  <p>Connecting to Firefox for Android from Firefox 36 onwards has been simplified, requiring fewer manual steps than before.</p>
 </dd>
</dl>
<dl>
 <dt>
  <a href="/en-US/docs/Tools/WebIDE">Firefox OS</a></dt>
 <dd>
  <p>Use WebIDE to debug apps running in Firefox OS, either in a real device or in the <a href="/en-US/docs/Tools/Firefox_OS_Simulator">Firefox OS Simulator</a>.</p>
 </dd>
</dl>
<dl>
 <dt>
  <a href="/en-US/docs/Tools/Remote_Debugging/Thunderbird">Thunderbird</a></dt>
 <dd>
  <p>Debug code running in Thunderbird.</p>
 </dd>
</dl>
<h3 id="Other_runtimes">Other runtimes</h3>
<p>The experimental <a href="/en-US/docs/Tools/Valence">Valence</a> add-on enables you to debug Web sites in runtimes that are not based on Gecko, like Google Chrome Desktop, Chrome on Android, and Safari on iOS.</p>
<p>Valence is included by default in <a href="/en-US/Firefox/Developer_Edition">Firefox Developer Edition</a>.</p>
<dl>
 <dt>
  <a href="/en-US/docs/Tools/Valence">Chrome for Android</a></dt>
 <dd>
  <p>Connect to Web sites running in the Chrome browser on an Android device.</p>
 </dd>
</dl>
<dl>
 <dt>
  <a href="/en-US/docs/Tools/Remote_Debugging/Chrome_Desktop">Chrome Desktop</a></dt>
 <dd>
  <p>Connect to Web sites running in Chrome on the desktop.</p>
 </dd>
 <dt>
  <a href="/en-US/docs/Tools/Valence">Safari on iOS</a></dt>
 <dd>
  <p>Connect to Use Web sites running in Safari on iOS.</p>
 </dd>
</dl>