Wordpress Favicon not displaying

I have uploaded my favicon to the root of my website and added this code to the header.php of my current theme.

<link rel="shortcut icon" href="http://mywebsite.com/favicon.ico" type="image/vnd.microsoft.icon"/>
<link rel="icon" href="http://mywebsite.com/favicon.ico" type="image/x-ico"/>

After refreshing many times the Favicon doesn't show up.

The url is right as I've checked it and it works.

Any ideas?

UPDATE: I'm testing it on firefox and yes, I've tried the ctrl-F5 too.

It might be that your browser cached the old favicon. This cache is usually hard to clear, but try:

• Ctrl-F5 on the html page
• Open http://yourwebsite.com/favicon.ico, and Ctrl-F5

Use the All in one Favicon Plugin for wordpress favicon. it's really useful and easy to use. you can even set frontend favicon and also backend favicon.

Plugin link : http://www.techotronic.de/plugins/all-in-one-favicon/