Apparently an April fools joke by the makers of the Opera web browser. You can see that it’s not a real feature when you read the Know Issues section here. Interesting idea nonetheless and funny “demo” video…

[youtube http://www.youtube.com/watch?v=kkNxbyp6thM&w=380%5D

More information More information at labs.opera.com
Link to source Found at cnettv.cnet.com