Firefox 3 - Plays Well With Others

Mozilla endeavors to promote open standards, while at the same time, create a better Web, even if it means using the “other guys” specifications and DOM extensions. Here is a summary of features added to Firefox 3 (Gecko 1.9) that either implement a good open specification or someone else’s DOM extensions - for the betterment of the Web:

WHATWG Web Applications (link)

• Experimental support (bug 319368, current spec).
• You can now register web applications as protocol handlers using the navigator.registerProtocolHandler() method.
• Online and offline events are now supported, allowing applications and extensions to detect whether there’s an active Internet connection available or not. See navigator.onLine
• The getElementsByClassName() DOM method is now supported (bug 357450).
• element transform() and setTransform() methods support (bug 365886, current spec).
• contentEditable support (current spec).
• Drag and Drop events are now supported (bug 375681). Whoops, not quite yet! (bug 356295)
• Focus management APIs (activeElement & hasFocus) are now supported (bug 337631, current spec).
• Offline resources is in progress (bug 367447 and dependencies, current spec)

Internet Explorer DOM Extensions (link)

• clientTop and clientLeft DOM extensions are now supported.
• elementFromPoint DOM extension is now supported (bug 199692).
• oncut, oncopy onpaste, onbeforecut, onbeforecopy and onbeforepaste DOM event extensions are now supported (bug 280959).
• getClientRects and getBoundingClientRect DOM extensions are now supported (bug 174397).
• The HttpOnly cookie extension attribute is now supported (bug 178993).

Yes, some of the Internet Explorer extensions are also WHATWG specs.

Not Invented Here? Not a problem :)