Ubiquity is an interesting add-on for the Firefox web browser that was covered before here at Ghacks. Here is a short explanation of what Ubiquity adds to the Firefox browser. It basically provides access to a command line in Firefox that comes preinstalled with dozens of commands to make life easier for the Firefox user. It takes for examples only a few seconds to look up an address in a map, perform a search in a search engine, submit a page to social media sites, send a message to Twitter, look something up in a dictionary or start writing an email.
The main command to open the command line interface is [CTRL Space]. This opens the command line in the top left corner of the screen. Matching commands will automatically be shown once the first char has been typed into the command line. To sum it up: Ubiquity enables Firefox users to quickly access web services and features without opening them first in the web browser.

Several commands are available that can add new features to Ubiquity. It is for example possible to add new search engines with just a few keys. Any website with a search box can be added that way to Ubiquity.
The Firefox community has created hundreds of additional commands that can be added to Ubiquity. The Mozilla Ubiquity team has added them to a master command list linking to hundreds of different commands that can be added to the web browser. The contents are divided into various categories from country specific commands to web search, programming language or web 2.0 commands.
Commands are added much like Firefox add-ons are added. If Ubiquity commands are found on a website a small bar at the top of the web browser is shown that can be used to add the command to the Internet browser.
Related posts:
Mozilla Labs Ubiquity Is A Firefox Killer Application!Ubiquity to be built into Firefox
Firefox Drag And Drop Search
Windows Xp Command Line List
Linux Command Line Fu
Add any Search Box to Firefox Search
Add specialized Search Engines to Firefox
Control Pad Turns The Numeric Keypad Into A Command Launcher


Your Ubiquity Ghacks link, Martin, is not correct its bringing not the correct page.
Well it is the correct page I think. Just scroll down to see the commands.
No martin i mean your first link this one gives your openingspage from your website.
http://www.ghacks.net/2009/05/14/mozilla-ubiquity-command-list/www.ghacks.net/2008/08/26/mozilla-labs-ubiquity-is-a-firefox-killer-application/
Thanks fixed, http:// was missing. Damn Google’s way of displaying links.
Isn’t Ubiquity just a ripoff of yubnub?