"This document will summarize the level of support for standard web technologies by popular web browsers. It deals primarily with the Internet Explorer, Firefox/Netscape/Mozilla, and Opera web browsers, with focus on the HTML, CSS and DOM technologies.

Not all of the standards are displayed here. In particular, some technologies that have consistently good or poor support by all major browsers or are seldom used aren’t listed. These tables attempt to be as comprehensive as possible."

Web browser standards support