Let Firefox add RSS-Feeds to Thunderbird

I'm using Thunderbird as mail client and RSS-reader. Firefox is the web browser of my choice. Now I would like Firefox to add links to RSS-feeds to Thunderbird. The next script makes that possible.


#!/bin/sh
#
# Open an RSS-Feed with Thunderbird.
# Idea from: http://ubuntuforums.org/showpost.php?p=4368033&postcount=7
#

exec thunderbird -mail "feed:${1}"


Unfortunately I was unable to make it work (using about:config) without a script.