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Codeburner is a Firefox plugin developed by SitePoint, designed to help web developers with their coding efforts. It's also available for Firebug, and is currently in development for Adobe CS4 and Adobe AiR. When web developers are coding and need a refresher on a specific tag in HTML or CSS, they can type it in the search box. The results show syntax information, code samples, and even browser compatibility issues. The plugin will even let you know if the tag is still compliant with the W3C standards, to make it easier to build a completely compliant website.
With this tool, web developers have a little help with debugging their code--because they can make sure their syntax is correct. Syntax errors can be frustrating when dealing with a lot of code. Paying attention to any browser compatibility issues as the developer codes is a wonderful way to ensure the finished product will display correctly on all the browsers the client expects the target audience will use to view the website.