via arstechnica.com/

The command interface is conceptually similar to desktop launcher tools like Enso, Quicksilver, and GNOME-Do. Unlike those tools, it places a strong emphasis on web content manipulation and web services. In many ways, it's like an interactive mash-up system. Ubiquity can respond to user instructions in several different ways. It can directly alter the contents of a web page, it can manipulate the browser interface, it can load a page in a new tab, and it can display output in a notification pop-up.

Ubiquity, a new Firefox extension from Mozilla Labs.

First the new Javascript Engine, which surpasses Squirrelfish by large amounts, now this. As much as I love Safari, if Firefox continues to add exciting features at such a strong pace, I seriously have to consider switching back to the beloved fox.