If there is no specialized class yet, but your browser can be controlled via the command line, then setting PERL_HTML_DISPLAY_COMMAND to the string to navigate to the URL will make HTML::Display use a system() call to the string. A %s in the value will be replaced with the name of the temporary file containing the HTML to display.
I don't understand it. Is it trying to say I should launch the browser from command line, then use PERL_HTML_DISPLAY_COMMAND as a scalar to pass the string? What do I pass to '$browser->display'?