Define here the prefered application to show the Help documentation files. 
Agent
Indicates whether the Help documentation should be presented using 
GAMGI or an external browser. GAMGI is faster and needs less memory, 
but the browser provides a fancier presentation.
Browser
Sets the path to the prefered browser executable. This is needed only 
when 
Agent is set to 
Browser. It is equivalent to define
the 
BROWSER environment variable, in ~/.bashrc:
BROWSER=/usr/bin/firefox; export BROWSER