Searches Ultimate-Guitar.com for tabs of the currently playing track. You can select the tab type (Guitar, Bass, Chords, Guitar Pro, Power Tab, or Drum Tab) from the options menu.
There are two control options to execute the search, a button to the right of the Songbird search, and a menu item under the Controls menu. Either of these (or both) can be turned off via the options menu.
-Updated compatibility for Songbird version 2.1