Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Siteimprove Accessibility Checker

Siteimprove Accessibility Checker by Siteimprove

Jumpstart your web accessibility efforts directly in Firefox. Is your web page accessible for everyone? Assess the accessibility of your web pages conveniently in Mozilla Firefox browser with the Siteimprove Accessibility Checker.

3.4 (5 reviews)3.4 (5 reviews)
1,516 Users1,516 Users
You’ll need Firefox to use this extension
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
Test any web page for accessibility issues with immediate resultsView issues highlighted directly on a pageFix issues by following the provided recommendationsUnderstand how visitors with vision impairments experience your siteGet practical tips and examples to help you design more accessible, inclusive experiences.
About this extension
The Siteimprove Accessibility Checker allows you to easily check the accessibility of any web page directly in Mozilla's Firefox browser, so you can immediately identify issues based on the latest ACT (Accessibility Conformance Testing) rules – with instant feedback and recommendations.

Kickstart your accessibility efforts today to ensure your website is accessible for everyone.

- Instant analysis: Get an immediate overview of your web pages' accessibility.

- Breakdown and clear explanations: Understand how each of the detected issues affects your visitors.

- Hands-on guidance: Get detailed recommendations on how to fix the issues (including links to the relevant WCAG techniques).

The Siteimprove Accessibility Checker provides automated accessibility testing within Mozilla's Firefox browser and allows for secure evaluation of any password-protected or non-public pages, multi-step forms, and dynamic content.

------------------------------------------------------

About Siteimprove

Siteimprove is a SaaS solution that helps organizations achieve their digital potential by empowering teams with actionable insights to deliver a superior website experience and drive growth.

Siteimprove has 550 employees across 13 offices, helping over 7,200 customers globally. We’re part of the World Wide Web Consortium (W3C), the leading group developing international web standards, and an exclusive Adobe Premier partner.

Learn more at siteimprove.com.

------------------------------------------------------

By installing the Siteimprove Accessibility Checker extension for Mozilla Firefox browser, you are agreeing to our Terms of Service [https://siteimprove.com/en/legal/chrome-extension-tos/] and Privacy Policy [https://siteimprove.com/en/legal/].
Rated 3.4 by 5 reviewers
Sign in to rate this extension
There are no ratings yet

Star rating saved

5
3
4
0
3
0
2
0
1
2
Read all 5 reviews
Permissions and dataLearn more

Required permissions:

  • Extend developer tools to access your data in open tabs

Optional permissions:

  • Access your data for hello.siteimprove.com
More information
Add-on Links
  • Homepage
  • Support site
  • Support Email
Version
2025.8.29.802
Size
3.07 MB
Last updated
2 days ago (Aug 29, 2025)
Related Categories
  • Web Development
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
End-User License Agreement
Read the license agreement for this add-on
Version History
  • See all versions
Add to collection
Report this add-on
More extensions by Siteimprove
  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

Go to Mozilla’s homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.