Register new protocol handler in Firefox

Sometimes you may want to configure [http://www.mozilla.org/firefox Firefox] to open links for a special protocol in a external application. There is a quite simple way to do this but it requires knowledge about one of Firefox most usefull "hidden feature" the ''about:config'' page. On this page you can view and alter the your Firefox configuration.

* Enter about:config
* Create a new string value by right click and select New -> String. Enter ''network.protocol-handler.app.'''protocol''''' as preference name.
* As value enter the path to the application you want to launch when you click on a URL with '''protocol://'''.

Example if you want to open ''lastfm://'' URLs with the [http://www.last.fm/ Last.fm] Player (installed under /opt/Last.fm/) you enter ''network.protocol-handler.app.lastfm'' as preference name and ''/opt/Last.fm/player'' as value.