Changing Default Mail Application in Mac OS X

No matter how many times I tried to configured Thunder Bird as default mail application in Thunder Bird Preference, it will still open up Mail.app / Entourage when I click on a mail link on Firefox Browser.

It’s kinda annoying, especially you accidentally click on a mail link on a website, and it took like years to fire up Entourage and ready to compose the email. In Mac OS X, there is no control panel to set default application like Windows/Linux. To solve the default mail application problem, it has to configure from Mail.app Preference, refer to the picture below.