localhost ~ # emerge --search firefox
Searching...
[ Results for search key : firefox ]
[ Applications found : 2 ]

*  www-client/mozilla-firefox
      Latest version available: 2.0.0.12
      Latest version installed: 2.0.0.11
      Size of files: 43,617 kB
      Homepage:      http://www.mozilla.org/projects/firefox/
      Description:   Firefox Web Browser
      License:       MPL-1.1 GPL-2 LGPL-2.1

*  www-client/mozilla-firefox-bin
      Latest version available: 2.0.0.12
      Latest version installed: 2.0.0.6
      Size of files: 16,293 kB
      Homepage:      http://www.mozilla.com/firefox
      Description:   Firefox Web Browser
      License:       MPL-1.1 GPL-2 LGPL-2.1