axe DevTools® - Web Accessibility Testing

Add accessibility auditing to the Firefox Developer Tools

axe DevTools® - Web Accessibility Audit Extension for Firefox

axe DevTools® - Web Accessibility Testing is a free, reliable, and lightweight testing tool extension for Firefox. Leveraging the world’s most trusted accessibility testing engine, axe-core, it allows developers, testers, and designers to conduct efficient audits and significantly reduces the need for manual testing. The add-on allows for automated website analysis, highlighting common accessibility issues and providing extensive free remediation guidance. Unique to axe DevTools, it ensures zero false-positive results, preventing wasted time and improving productivity.

Add-on stats

Users: 8,846
80
Rating: 4.45
(47)
Version: 4.94.1 (Last updated: 2024-10-22)
Creation date: 2015-08-23
Weekly download count: 239
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • tabs
  • storage
  • activeTab
Size: 1.83M

Other platforms

Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary

Accessibility checker for developers, testers, and designers in Firefox.

Find and fix more accessibility issues during website development with axe DevTools.

The free axe DevTools® browser extension is a fast, lightweight, yet powerful testing tool driven by the world’s most trusted accessibility testing engine, axe-core, developed by Deque.

Why use axe DevTools to build accessible websites? -To deliver brilliant user experiences for everyone, including the 1 billion people globally living with a disability today. -To avoid wasting time chasing fake issues. Only axe prevents false positive results. -To improve accuracy, preventing tickets from resurfacing again and again. -To reduce the risk and cost of accessibility lawsuits.

★ Automated testing With the push of a button, axe DevTools analyzes your site, automatically surfacing the majority of common accessibility issues—almost triple the industry average. Drill down into each issue, inspect the source of the problem and leverage extensive free remediation guidance to fix it quickly and accurately.

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User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Very useful accessibility testing tool
  • Great for identifying accessibility issues
  • Easy to use with clear reporting
  • Integration with developer tools is valuable
  • Open-sourced axe-core engine
Cons
  • Concerns about data privacy and user information collection
  • Experiences of the tool infinitely loading on local websites
  • Encountering console error messages frequently
  • Missing certain features available in Chrome version
  • Font size in developer tools is too small for readability
Most mentioned
  • Data privacy concerns
  • Tool is useful for accessibility testing
  • Error messages causing disruptions
  • Integration with developer tools
  • User-friendly interface and reporting
User reviews
by shuuji3, 2025-01-08

by Nicolas M. Pardo, 2024-10-10

As another 1-star review stated, you collect and sell users' personal information, and yet you state that you thought you were being very up front, very clear about the fact that you do. Tell me then, on your MAIN PAGE in Mozilla Extensions, are you saying that you are being up front about it just because the LINK TO your license agreement is listed just above the following? "This extension does not capture any information or usage analytics at all." Can you REALLY not see how people would be lulled into a false sense of security by the above-quoted statement? And please: DON'T come arguing semantics just because the word 'collect' is absent, when the word 'capture' in the quoted statement in question is used instead, because even a fool with only a rudimentary knowledge of the English language could catch that! I would ask what you would expect most people to think, but you will likely hide behind something to the effect of you not being able to help the person who is stupid enough to not read the terms of a semi-binding license agreement and that you have deceived no one in any way... technically. And, in most cases, YES people should read license agreements but when you put 'This extension does not capture any information or usage analytics at all.' in the very next line just below the link to your agreement, well, let us just say that it IS most certainly more than enough to turn around and bite you and were it a more serious matter, while you certainly could win, there is more than a shadow of a doubt that you are being purposely deceptive.
by Michael, 2023-07-08
View all user reviews

Add-on safety

Risk impact

axe DevTools® - Web Accessibility Testing requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

axe DevTools® - Web Accessibility Testing is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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