Ubuntu :: Firefox Does Not Display The Entire Page Source?

First of all I want to say that I'm new to Linux. I am using Ubuntu 10.04 LL and i want to create a html page, in terminal mode, but firefox does not display it correctly. i used this tutorial, http://linuxcommand.org/wss0030.php , but it seems that whatever i do, when i run the page with firefox (x@ubuntu:~/bin$ firefox page.html), the page displays the #!/bin/bash line, it doesn't interpret variables, reserved words, or any other special characters ( $, <<- ). I've tried to change the encoding in firefox from Unicode-8 to Unicode-32 but no luck