Mozilla Ubiquity is still under heavy development in Mozilla Labs. It is indeed very innovative and user friendly approach to enhance the World Wide Web experience of the users. It allows you to typing things in natural language and it do the rest.
First you need to install Ubiquity add-on. Go to Ubiquity home page and get the Firefox add-on. You have to restart the browser. On Linux you can activate it by pressing, "ALT+SPACE" and on windows "CTRL+SPACE".
You will get a good idea about by watching following video:
Looks like Ubiquity will appear on the next Firefox major release. ;-)
The newest service from Google is called "Chrome", it is a web browser with stunning user interface with but not bulky or heavy on resources. Actually nice implementation of KISS principle.
Chrome supports tabs as other web browsers and the other main features are,
Web application shortcut creation
Amazing crash control, If one web application crashes it won't affect other tabs.
And security features such as skipping "History" for certain pages, unsafe/malware/phishing site warnings.
Instance book marking as in firefox 3 buy cling start icon.
Can import data from Firefox and Internet Explorer
Nice download manager
Web History, Search, suggestions all in one field.
Opera like speed dial.
Google chrome is based on open source technologies from Firefox and web kit engine. Google chrome is an open source software and based on multiple licenses mainly BSD license. Google Chrome is currently available for Microsoft Windows only.