Midnight commander does not launch firefox from ubuntu 10.04

[Tim Johnson <tim johnsons-web com>]

 I'm dual-booting slack 13.0 and ubuntu 10.04
 the following mailcap entry in mailcap on slack using 
 mc 4.7.0.6 (compiled)
 text/html;  firefox '%s';   nametemplate=%s.html;   test=test
 "$DISPLAY" != ""
 allows me to hit <enter> on an .html file in MC and opens
 a tab for that document in firefox.

 On ubuntu 10.04, midnight commander was installed from
 repositories and the version information is as follows
 """"
 GNU Midnight Commander 4.7.0
 Virtual File System: tarfs, extfs, cpiofs, ftpfs, fish
 With builtin Editor
 Using system-installed S-Lang library with terminfo database
 With subshell support as default
 With support for background operations
 With mouse support on xterm and Linux console
 With internationalization support
 With multiple codepages support
 Data types: char 8 int 32 long 32 void * 32 off_t 64 ecs_char 8
 """"
 and the above mailcap entry does not work. What happens when I
 hit <enter> on an html doc in MC on ubuntu is that the raw text of
 the file is read to stdout (visible with Control-o shell).

 Does anyone know how to make this feature work?
 thanks
-- 
Tim 
tim at johnsons-web.com or akwebsoft.com
http://www.akwebsoft.com