axe DevTools Firefox browser extension
Free automated accessibility testing for your web apps in Firefox.
Join 400,000+ active weekly axe DevTools users in squashing accessibility bugs.
How the axe DevTools Firefox extension works
The free axe DevTools Mozilla Firefox browser extension is ideal for individual developers and testers to find and fix common accessibility issues in your web applications.
It’s lightweight, simple to use, doesn’t require advanced accessibility knowledge and won’t waste your time with false positives.
Choose between our Chrome, Firefox, or Edge browser extension to automatically test for accessibility defects directly within your browser.
Automated accessibility testing
With the push of a button, axe DevTools helps you catch 57% of accessibility issues while coding, dramatically reducing rework and trouble tickets down the line.
Drill down into each issue, inspect the source of the problem, and leverage extensive free issue resoltuion guidance to fix it quickly and accurately.
Issue resolution guidance
The built-in references and guidance provide issue descriptions, locations, sources, and level of impact enabling you to fix bugs without requiring deep knowledge of accessibility standards.
You can also “highlight”, “inspect”, and learn “more info” about how to fix the problem and why it matters.
axe-core rules library
Downloaded hundreds of millions of times, Deque’s axe-core accessibility rules library takes the guesswork out of interpreting and applying WCAG to your site.
Chosen by Google, Microsoft, and development and testing teams everywhere — axe is the standard for accessibility testing
Axe-core powers all of Deque’s accessibility testing tools.
How to get started
After the axe DevTools Firefox extension is successfully installed…
- Go to Firefox and navigate to the page you wish to test
- Open developer tools (right-click on the screen and go to “inspect”)
- Navigate to axe DevTools
- Run a free automated test by clicking the “Scan all of my page” button
- Highlight and inspect issues
- View severity and issue descriptions
- Follow the issue resolution guidance to learn how to fix the issues
- Repeat
