This is new to me as a desktop developer.
If I could figure out how this is accomplished, it may be relevant to some research I\'m doing, specifically how to migrate
Just a follow-up for those who answered.
Turns out that the situation is somewhat complicated. Although about:config is available for FireFox, making the appropriate entries just doesn't work.
This link: http://support.mozilla.com/tiki-view_forum_thread.php?locale=fr&forumId=1&comments_parentId=74068 describes problems for Linux, but I can verify that the same problems also occur under Windows.
To make this work under Windows, I had to create a .REG file which contains the appropriate information, according to this link: http://kb.mozillazine.org/Register_protocol#Windows
Now it works!
Thanks for all the responses.