having a glimps at the link, it looks like you are missing something -- or the information at that page are outdated.

maybe you can simply remove the "catalog" for mozilla using the gui?

if not, then instead of

dir

use

ls -al

and for gedit: there's leafpad, but without working apt you won't be able to install it ...
do

cat /etc/apt/sources.list.d/filename-found-with-ls

and c&p the matching line.


however, have a look at
http://www.mozilla.com/en-US/m/
it should automatically add the right repository, though iirc firefox mobile is already in the maemo repos.