URL Dispatching on Linux

[Znib]

Hi,

I've done everything exactly as written in http://www.mozilla.org/projects/thunder ... xurls.html, but now when I click on a link in an e-mail in thunderbird, firebird asks me what to do with that file, like it does for an unknown mime type. And ofcourse when I tell it to open with firebird, it complains because the profile is in use.
Any ideas?

Thanks!
Marco