SlimSearch is a quick and easy search extension
for Firefox. It allows you to perform searches on
text selected with the mouse by using the
contextual (right-click) menu. You can do normal
searches, dictionary searches, address searches,
Froogle, and many other kinds. Google is
extensively used for most of the searches, but
other specialized search engines are used too. The
focus is on simplicity of utilization: less is
more.