Now it is possible with your favorite browser Firefox. The add-on Firesay lets you surf the web by voice. Just say your search queries or say the sites name that you want to visit instead of typing them. Firesay is now in Beta phase. Currently it works only on Windows 7 (not work on Windows XP, Linux and Mac) and recognize only few key words like Facebook, Twitter, Bing, Google, etc (Full list here). Moreover the voice recognition engine is more sensitive to surrounding voice. You can download Firesay at here and experience a new, more natural, intuitive and efficient way to get to the content you need with a microphone or webcam. I tried it here, but the result was not as expected.