• Acid1 - Acid1, originally called the Box Acid Test, is a test page for web browsers. It was developed in October 1998 and was important in establishing baseline interoperability between early web browsers, especially for the Cascading Style Sheets 1.0 specification.
  • Acid2 - Acid2 is a test page published and promoted by the Web Standards Project to expose web page rendering flaws in web browsers and other applications that render HTML. Named after the acid test for gold, it was developed in the spirit of Acid1, a relatively narrow test of compliance with the...
  • XHTML - Extensible Hypertext Markup Language is part of the family of XML markup languages. It mirrors or extends versions of the widely used Hypertext Markup Language, the language in which Web pages are formulated.
  • Dutch websites
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  • @fail0verflow Curious, can you go to and share the results?
    Andrewmd5, Atlanta, GA at Mon, 19 Feb 00:40:40
    ramankk92, Pallakad, India at Thu, 15 Feb 08:16:16
  • Chrome Dev 64.0.3282.137 on a Google Pixel 2 XL running Android 8.1.0 scored 517 points. How well does your browser…
    VeggieButter, Galway, Ireland at Tue, 13 Feb 17:16:25 videos

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