I am having a problem with Firefox for Linux version 2.0.0.6

When my HTML application calls shell file to execute (just to echo
some information) Firefox and Linux ask me what application I want to
run with it
(" You have chosen to open .sh which is a : shell script from /
srv/www/cgi-bin.
What should Firefox do with this file?")

I just want to display echo on Firefox web browser main window.

What should I do ?

Thx in advance,
lalo