Mozilla, the company that makes the popular Firefox browser, announced this week a software plug-in for Firefox called Ubiquity, which does some surprising and useful things for small screen sub-notebook computers.

Ubiquity wasn’t designed for, and isn’t promoted as, a subnotebook usability enhancer. It’s meant to be an all-purpose Firefox booster. But it turns out that Ubiquity is especially powerful on subnotebooks. The reason: Ubiquity replaces the act of opening multiple browser windows or tabs to perform multi-site or multi-page tasks with simple commands that give you the same result.

After installation, launch Ubiquity from Firefox by pressing Ctrl+Space (Option+Space on a Mac), which brings down a command-line menu. You type a command, and the magic happens.

When you type a letter or two, Ubiquity drops down a list of suggestions, of guesses as to what you intend to type. Once you see your intended option on the list, you can stop typing the service and go on to type the rest of the command. For example, let’s say you want to find a video demo of Ubiquity on YouTube. You type “y” (without quotation marks), and “Yahoo,” “YouTube” and “Yelp” come up on the list. Go ahead and type “o,” and YouTube remains as the only option on the list. Leave it at “yo,” hit the space bar, and type “ubiquity.” Before you hit the enter key, several thumbnails of videos on YouTube pop up, and two of them are Mozilla Ubiquity demos.

This feature is further relief from the tiny keyboards and awkward typing on subnotebooks. This process is way easier than the conventional way to open YouTube and search for a video.

Searching YouTube, as well as Google, Wikipedia, the Internet Movie Database (IMDB), Yahoo, Weather services and others, are among the rudimentary processes Ubiquity simplifies and accelerates. Other simple tasks include looking up the definitions of words (select the word, call up the Ubiquity menu and type “define”); sending whatever page you’re looking at via e-mail (type “email” then hit the Enter key); translating text into a foreign language (type TR, then the phrase you’d like to translate, then “to” followed by the language); and adding things to your calendar (type “add” followed by the appointment and when to schedule it — you can use “natural language” for this, and Ubiquity figures it out).Other Ubiquity commands enable more powerful tasks. One impressively easy feat is to paste Google Maps inside e-mail. Open Gmail (the only mail service currently supported), and click “Compose Mail.” From the Gmail page, you find the map by simply typing “map” followed by an address or a location that Google Maps understands. Let’s say you want a map showing the location of La Super Rica restaurant. Just type “map la super rica” and up it comes. Click on the map, then click on the “Insert map in page” link. Ubiquity will paste a screen capture of the map into your Gmail message. What’s great about this on a subnotebook is that you never had to actually “go” to Google Maps. It all happened from Gmail.