Firefox Developer Tools

  • Revision slug: Tools
  • Revision title: Developer Tools
  • Revision id: 435591
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  • Creator: Liuche
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This page lists tools that help you develop and debug websites and web apps. It's focused mostly on the tools developed and maintained at Mozilla, but we've listed other popular and useful tools under "More Resources".

MOZILLA DEVELOPER Tools

This section lists tools developed and maintained by Mozilla's Developer Tools team. These tools are all accessed from within Firefox, under the "Firefox" menu (or the "Tools" menu on OS X and Linux), then "Web Developer".

Most of these tools are built into Firefox and are accessible through the DevTools Window, but the Firefox OS Simulator ships as an add-on.

Page Inspector
View and modify the HTML and CSS for the selected element.
Web Console
See informational, warning and error messages emitted by the browser or web content, and examine and manipulate the page using JavaScript.
Style Editor
View and edit CSS styles for the current page.
Scratchpad
A text editor built into Firefox that lets you write and execute JavaScript.
JavaScript Debugger
Step through JavaScript code that is running in the browser and watch variables to help track down bugs.
JavaScript Profiler
Use the profiler to figure out where your JavaScript code is spending its time.
Responsive Design View
See how your website or app will look on different screen sizes without changing the size of your browser window.
Developer Toolbar
A command-line interface to manipulate and work with the developer tools in Firefox, and buttons for quick access to the most commonly used tools.
Error Console
Reports JavaScript-related errors and warnings, CSS errors and arbitrary messages from chrome and web content.
3D View
Also known as "Tilt", this provides a 3D visualisation of the current page.
Firefox OS Simulator
Run and debug your Firefox OS app on the desktop, without needing to use a real Firefox OS device.
Remote Debugging
Use the JavaScript Debugger or Web Console to debug your Android device over USB or WiFi.

Getting help

If you have any questions about the developer tools built into Firefox, please come and ask us on the dev-developer-tools mailing list or in the #devtools channel on Mozilla's IRC network.

This section lists resources which aren't maintained by Mozilla's developer tools team, but which are widely used by web developers. We've included a few Firefox add-ons in this list, but for the complete list see the "Web Development" category on addons.mozilla.org.

Firebug
A very popular and powerful web development tool, including a JavaScript debugger, HTML and CSS viewer and editor, and network monitor.
DOM Inspector
Inspect, browse, and edit the DOM of web pages or XUL windows.
Web Developer
Adds a menu and a toolbar to the browser with various web developer tools.
Webmaker Tools
A set of tools developed by Mozilla, aimed at people getting started with Web development.
W3C Validators
The W3C website hosts a number of tools to check the validity of your website, including its HTML and CSS.
JSHint
JavaScript code analysis tool.
JSLint
Another JavaScript code analysis tool.

 

 

Revision Source

<p>This page lists tools that help you develop and debug websites and web apps. It's focused mostly on the tools developed and maintained at Mozilla, but we've listed other popular and useful tools under "More Resources".</p>
<div class="cleared topicpage-table">
  <div class="section">
    <h2 class="Documentation" id="Documentation" name="Documentation">MOZILLA DEVELOPER Tools</h2>
    <p>This section lists tools developed and maintained by Mozilla's Developer Tools team. These tools are all accessed from within Firefox, under the "Firefox" menu (or the "Tools" menu on OS X and Linux), then "Web Developer".</p>
    <p>Most of these tools are built into Firefox and are accessible through the <a href="/en-US/docs/Tools/Toolbox" title="/en-US/docs/Tools/Toolbox">DevTools Window</a>, but the <a href="/en-US/docs/Tools/Firefox_OS_Simulator" title="/en-US/docs/Tools/Firefox_OS_Simulator">Firefox OS Simulator</a> ships as an add-on.</p>
    <dl>
      <dt>
        <a href="/en-US/docs/Tools/Page_Inspector" title="HTML/Element">Page Inspector</a></dt>
      <dd>
        View and modify the HTML and CSS for the selected element.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Web_Console" title="HTML/Attributes">Web Console </a></dt>
      <dd>
        See informational, warning and error messages emitted by the browser or web content, and examine and manipulate the page using JavaScript.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Style_Editor" title="HTML/HTML5">Style Editor</a></dt>
      <dd>
        View and edit CSS styles for the current page.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Scratchpad" title="HTML/Forms">Scratchpad</a></dt>
      <dd>
        A text editor built into Firefox that lets you write and execute JavaScript.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Debugger" title="HTML/Bad_copy_pasting_habits">JavaScript Debugger</a></dt>
      <dd>
        Step through JavaScript code that is running in the browser and watch variables to help track down bugs.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Profiler" title="HTML/Bad_copy_pasting_habits">JavaScript Profiler</a></dt>
      <dd>
        Use the profiler to figure out where your JavaScript code is spending its time.</dd>
      <dt>
        <a href="/en-us/docs/Tools/Responsive_Design_View" title="/en-us/docs/Tools/Responsive_Design_View">Responsive Design View</a></dt>
      <dd>
        See how your website or app will look on different screen sizes without changing the size of your browser window.</dd>
      <dt>
        <a href="https://developer.mozilla.org/en-US/docs/Tools/GCLI" title="en/Tools/GCLI">Developer Toolbar</a></dt>
      <dd>
        A command-line interface to manipulate and work with the developer tools in Firefox, and buttons for quick access to the most commonly used tools.</dd>
      <dt>
        <a href="https://developer.mozilla.org/en-US/docs/Error_Console" title="en/Error_Console">Error Console</a></dt>
      <dd>
        Reports JavaScript-related errors and warnings, CSS errors and arbitrary messages from chrome and web content.</dd>
      <dt>
        <a href="/en-US/docs/Tools/3D_View" title="en/Error_Console">3D View</a></dt>
      <dd>
        Also known as "Tilt", this provides a 3D visualisation of the current page.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Firefox_OS_Simulator" title="en/Error_Console">Firefox OS Simulator</a></dt>
      <dd>
        Run and debug your Firefox OS app on the desktop, without needing to use a real Firefox OS device.</dd>
      <dt>
        <a href="/en-US/docs/Tools/Remote_Debugging" title="en/Error_Console">Remote Debugging</a></dt>
      <dd>
        Use the JavaScript Debugger or Web Console to debug your Android device over USB or WiFi.</dd>
    </dl>
  </div>
  <div class="section">
    <h2 class="Community" id="Community" name="Community">Getting help</h2>
    <p>If you have any questions about the developer tools built into Firefox, please come and ask us on the <a href="https://lists.mozilla.org/listinfo/dev-developer-tools" title="https://lists.mozilla.org/listinfo/dev-developer-tools">dev-developer-tools</a> mailing list or in the <a href="http://mibbit.com/?channel=%23devtools&amp;server=irc.mozilla.org">#devtools</a> channel on <a href="http://irc.mozilla.org/">Mozilla's IRC network</a>.</p>
    <h2 class="Related_Topics" id="Related_Topics" name="Related_Topics">More resources</h2>
    <p>This section lists resources which aren't maintained by Mozilla's developer tools team, but which are widely used by web developers. We've included a few Firefox add-ons in this list, but for the complete list see the <a href="https://addons.mozilla.org/en-US/firefox/extensions/web-development/" title="https://addons.mozilla.org/en-US/firefox/extensions/web-development/">"Web Development" category on addons.mozilla.org</a>.</p>
    <dl>
      <dt>
        <a href="https://www.getfirebug.com/" title="HTML/Forms">Firebug</a></dt>
      <dd>
        A very popular and powerful web development tool, including a JavaScript debugger, HTML and CSS viewer and editor, and network monitor.</dd>
      <dt>
        <a href="https://developer.mozilla.org/en-US/docs/DOM_Inspector" title="HTML/Forms">DOM Inspector</a></dt>
      <dd>
        Inspect, browse, and edit the DOM of web pages or XUL windows.</dd>
      <dt>
        <a href="https://addons.mozilla.org/en-US/firefox/addon/web-developer/" title="HTML/Forms">Web Developer</a></dt>
      <dd>
        Adds a menu and a toolbar to the browser with various web developer tools.</dd>
      <dt>
        <a href="https://webmaker.org/en-US/tools/" title="https://webmaker.org/en-US/tools/">Webmaker Tools</a></dt>
      <dd>
        A set of tools developed by Mozilla, aimed at people getting started with Web development.</dd>
      <dt>
        <a href="http://www.w3.org/Status.html" title="HTML/Forms">W3C Validators</a></dt>
      <dd>
        The W3C website hosts a number of tools to check the validity of your website, including its <a href="http://validator.w3.org/" title="http://validator.w3.org/">HTML</a> and <a href="http://jigsaw.w3.org/css-validator/" title="http://jigsaw.w3.org/css-validator/">CSS</a>.</dd>
      <dt>
        <a href="http://www.jshint.com/" title="HTML/Forms">JSHint</a></dt>
      <dd>
        JavaScript code analysis tool.</dd>
      <dt>
        <a href="http://www.jslint.com/" title="HTML/Forms">JSLint</a></dt>
      <dd>
        Another JavaScript code analysis tool.</dd>
    </dl>
    <p>&nbsp;</p>
  </div>
</div>
<p>&nbsp;</p>
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