Standards support

Standards support

Mozilla Firefox supports many software standards, including HTML, XML, XHTML, CSS, ECMAScript (JavaScript), DOM, MathML, DTD, XSLT, XPath, SVG, and PNG images with alpha transparency.[20] Firefox also supports standards proposals created by the WHATWG such as the offline storage[21][22] and canvas element.[23] Although Firefox 2 does not pass the Acid2 standards-compliance test, development builds of Firefox 3 pass the test.[24]