How to prevent favicon.ico making extra http request

Here how. 

#source : http://stackoverflow.com/questions/1321878/how-to-prevent-favicon-ico-requests

UPDATE 1:

From the comments (jpic) it looks like Firefox >= 25 doesn't like the above syntax anymore. I tested on Firefox 27 and it doesn't work while it still work on Webkit/Chrome.

So here is the new one that should cover all recent browsers. I tested Safari, Chrome and Firefox:

<link rel="icon" href="data:;base64,=">  

I left out the "shortcut" name from the "rel" attribute value since that's only for older IE and versions of IE < 8 doesn't like dataURIs either. Not tested on IE8.

UPDATE 2:

If you need your document to validate against HTLM5 use this instead:

<link rel="icon" href="data:;base64,iVBORw0KGgo="