[Orgmode] org-protocol

[Richard Riley]

I'm trying to get FF working with org again -

http://orgmode.org/worg/org-contrib/org-protocol.php

It says 

,----
|    1. Type "about:config" into the location bar and press enter.
|    2. Click "I'll be careful, I promise!" to continue.
|    3. Right-click on the grid
|    4. Choose "New" -> "String" from the context menu.
|    5. Enter "network.protocol-handler.app.org-protocol" as the properties 
name.
|    6. Click "OK".
|    7. Leave the value blank.
|    8. Next time you try to open a location "org-protocol://..." FF will ask 
you for the program to use. Enter the path to emacsclient.
`----

It doesnt prompt me for a program. Is this uptodate or is there a better
step by step guide? 

(I used to have this working but a forced firefox reinstall has
corrupted it).

thanks

r.