We recommend that you use Netscape. You can specify the location of the browser used by Help > Browser Preferences... > Browser > Browser Executable Location . You can enter the directory here in the Directory window. However, the default setting, Use PATH , is adequate for most users. It means that the Netscape executable found via your UNIX environment variable PATH is used.
Alternatively, set the variable
(details in the
LispWorks User Guide and Reference Manual
LispWorks IDE User Guide (Unix version) - 25 Nov 2011