Released in March of 2008, and developed by members of the Web Standards Project, Acid3 is a test designed to rate the efficiency and expose flaws in web browsers.Web Standards Project: Putting Browser Makers on Notice... (March 3, 2008)
Up to Standard
Among other things, Acid3 looks for whether a browser uses its default settings and rates the browser's animation capabilities.Acid3.Acidtests.org: Acid3 Test The browser is then assigned a score out of 100. In preliminary tests, Acid3 found several of the most commonly used browsers, including Internet Explorer, Firefox and Safari, to be flawed.Web Standards Project: Putting Browser Makers on Notice... (March 3, 2008)