Basically, you will have to create an XML file inside the ~/.mozilla/firefox/XYZ.default/searchplugins directory (replace XYZ with your profile's characters, could be any name there), with the following content (I will use Ubuntu Forums for this example):

Tutorial about installing software in Ubuntu.

There used to be a popular tutorial for beginners about this titled How to install ANYTHING in Ubuntu!, however it has not been updated since 2006 and it is a bit outdated (some of it still applies though).

In this tutorial I’ll show how to get some nicely colored man pages by adding several lines inside the .bashrc file, explaining what the code means and how it works.

This tutorial targets especially beginners in Linux and particularly Ubuntu, users who have just recently switched from Windows to Ubuntu and are facing this question: "how can I compile and run my C or C++ programs in Ubuntu?".

This tutorial was written for Firefox 4 and Ubuntu 11.04, however pretty much everything contained here applies to older releases and will probably work in future versions too. This how-to covers pretty much everything needed to get you started with Firefox: installing Flash, customizing it, installing add-ons and themes, and useful tips for working faster with it.

MegaGlest is based upon the original Glest engine, but offers a lot of new features and capabilities, extending the original Glest (which is rather poor in options in my opinion) to a whole new game, including support for graphical resolutions, new factions, tech trees, tilesets and maps.

In this tutorial I will show you several simple ways of creating ISO images with Ubuntu, from doing it with graphical applications included in the repositories or by using just the command-line. Each method below will get the work done, and you can start burning your images to a CD or DVD in no time.

CMus is a free, powerful, terminal-based music player using the ncurses toolkit. CMus supports various audio formats, including Ogg Vorbis, FLAC, MP3, WAV, Musepack, WavPack, WMA, AAC and MP4.

This guide focuses on showing you how to manipulate and convert various audio files using tools included in the Ubuntu repositories.

Wine is a compatibility layer which allows Windows applications to run on Linux by translating Windows system calls into native Linux calls.

Goggles Music Manager (or GMM for short) is a music player written using the FOX toolkit, with support for Ogg Vorbis, FLAC, MP3, MP4, ASF and Musepack.

This is a guide containing the most popular and useful ways of using the APT and DPKG commands, and it applies to both Ubuntu and Debian (and their derivatives). I mentioned where super user privileges are required, the ones without a mention can be executed as normal user.

According to Wikipedia, IMAP (Internet Message Access Protocol), together with POP is one of the most popular protocols for email retrieval.