# a11y.css accessibility checker

Firefox extension · by Stephane Deschamps · Web Development

a11y.css accessibility checker has 192 daily users, rated 5.0 from 1 rating, \#973 of 15,059 in Web Development.

## Figures

- Daily users: 192
- Rating: 5.0 · 1 rating
- Weekly downloads: 0
- 1-day growth in daily users: +6
- 7-day growth in daily users: +1
- 30-day growth in daily users: +8 (+14 over 53.5 days)
- Rank: #8,951 of 631,325 Firefox listings with a user count (down 95 since 2026-10-23)
- Rank: #973 of 15,059 in Web Development

## Description

a11y.css provides warnings about possible risks and mistakes that exist in HTML code through a style sheet. This extension also provides several accessibility-related utilities.  
  
see https://github.com/ffoodd/a11y.css/tree/webextension for  details

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Source: https://storetally.com/firefox/923338/a11ycss  
As of 2026-11-01, from the StoreTally census.