Yub It!

About
YubNub provides a command line for the Web, a way to search all search engines, and create shortcuts to websites. Yub It! tweaks Firefox to automatically execute YubNub commands right from the address bar. It's much quicker to enter "g washington, d.c." and have YubNub direct you to a Google results page than to wait for the Google homepage to load first.
For those without Firefox, drag this bookmarklet to your bookmarks. You'll be able to quickly run Fetch commands.
Visit us at Mozilla Add-ons.
Screenshots
Search by keyword

Results

Requirements
- Firefox 2.0-4.0bpre