a11y.css provides warnings about possible risks and mistakes that exist in HTML.
First a11y.css was a bookmarklet inserting a stylesheet into the page. This CSS file intends to warn developers about possible risks and mistakes that exist in HTML code. It can also be used to roughly evaluate a site's quality by simply including it as an external stylesheet. This extension does the same, plus adds some tools: * Outline focus (keyboard navigation) * Show languages used (relies on lang attributes) * Check alt and title attributes on images You can submit your bugs on github. Original bookmarklet code: Gaël Poupard Extension code: Stéphane Deschamps Thanks to Anthony Ricaud and Mathieu Pillard for their help!