If they did learn anything, it has been a slow process. The <canvas> tag for example, was introduced in Safari 1.3 and has been supported in Firefox since 1.5,

If they did learn anything, it has been a slow process. The <canvas> tag for example, was introduced in Safari 1.3 and has been supported in Firefox since 1.5, Opera since version 9, and in all versions of Chrome. Contrast that with IE. The <canvas> tag is not supported by IE until version 9. If you want to do any cool <canvas> graphics in versions before 9, you'll have to use something like ExplorerCanvas at http://code.google.com/p/explorercanvas/ http://code.google.com/p/explorercanvas/, which of course mean more conditional IE comments in you HTML, and more pain for web developers.