See actual location of shortened URLs - Avoid malicious short links

Now a days we are handling so many shortened URL's in emails, websites, social networking sites like Twitter or Facebook etc. If the origin of the shortened URLs is from a trusted source, you don't need to worry about it. What if you are getting an invitation to click on the shortened URL from an unknown source ? How can we know the actual location which pointing the shortened link ? It is not advised to click on a shortened URL without knowing the full URL. Here I am introducing one Firefox Addon which can show the full URL without click on the tiny link.

Check on of my tweet with a shortened URL.

[Actual URL is

http://www.corenetworkz.com/2010/06/capture-full-screen-shot-using-firefox.html and the shortened URL is :

http://bit.ly/9n5eSR ]

See my actual Tweet in chrome where no long URL pluggin installed.