Is it possible to define shortcuts in Firefox to do a Google search restricted to a particular site?
Background: in the Opera web browser I can define a shortcut, say "su", to do a Google search restricted to a particular site, e.g. superuser.com. This shortcut can be used from the address bar.
Example:
su firewall
will do the same as opening www.google.com and typing:
site:superuser.com firewall
The definition for this is:
http://www.google.com/search?q=site:superuser.com+%s&sourceid=opera&num=%i&ie=utf-8&oe=utf-8
where "%s" represent the search string - "firewall" in the example.