If you haven’t heard of it you are missing out.  This extension lets you take your web browser and super charge it.  I could spend a lot of time tell you all the things it can do but why not let the developer do that.

Here is a quick sample of what it is all about.

Ubiquity is a Mozilla Labs experiment into connecting the Web with language in an attempt to find new user interfaces that could make it possible for everyone to do common Web tasks more quickly and easily.

The overall goals of Ubiquity are to explore how best to:

• Make it extremely easy to Extend browser functionality, and share new functionality with other users.
• Enable on-demand, user-generated mashups with existing open Web APIs. (In other words, allowing everyone–not just Web developers–to remix the Web so it fits their needs, no matter what page they are on, or what they are doing.)
• Empower users to control the web browser using a natural-language-like command interface. (With search, users type what they want to find. With Ubiquity, they type what they want to do.)
• Use Trust networks and social constructs to balance security with ease of extensibility.

Download this extension and you will will not know what to do without it.

What are you favorite extensions?  I use Adblock Plus, Firebug, Download Statusbar, Foxmarks Bookmark Synhcronizer, Google Gears, Stumble Upon, Tab Mix Plus and Ubiquity

Note: Ubiquity is in BETA so there are limitations, but user your imagination as to where this will go.  The sky is the limit.