Firefox Installer is a script to make the installation of Firefox in Debian easier.

Available in English, Spanish and French for now.

Project page: http://zironid.github.io/firefox-installer/ (Under work)

To run the script you must give it execution permissions.

From a graphical file manager, right click on the script,
 go to the "Permissions" tab and click on the tab
"Allow executing file as program" (or similar).

After that you can double click it, and choose "Execute in terminal".

Or from the command line:

chmod +x /path/firefox-installer.sh

And for executing the script:

./path/firefox-installer.sh