idlwave-help-browser-is-local

idlwave-help-browser-is-local is a variable defined in `idlw-help.el'.
Its value is

nil

Documentation:
Whether the browser will display locally in an Emacs window.
Several browsers run and/or display inside Emacs windows, but most are
external programs. If the browser name contains "-w3", it is
assumed to be local to Emacs. For other local browsers, this variable
must be explicitly set non-nil in order for the variable
`idlwave-help-use-dedicated-frame' to function.

You can customize this variable.