In order to handle correctly the Octoshape protocol you'll need to write a bash script using a text editor, let's call it octo:

#!/bin/sh
exec /home/XXXXX/octoshape/OctoshapeClient -url:"$@"

Change the script according to the location of the OctoshapeClient program in your filesystem. If you have root privileges you can put the script into the /usr/bin directory and give it execution privieges, using chmod 755 octo

Mozilla Firefox

1. type about:config in the address bar
2. right-click on your mouse and select: new string
3. enter the value: network.protocol-handler.app.octoshape and press OK
4. enter the value: octo, or the complete path where you put the script

Opera

1. From the menu, select Preferences - Advanced - Programs
2. add a new protocol, call it octoshape
3. enter the path where you put the script (e.g. octo, if it's in the /usr/bin directory or /home/XXXX/octo)

Now you can watch all the Octoshape channels directly from your web browser, with no need to open a terminal window