Mac Forum / Applications / Firefox / Mozilla / June 2004

When I clik on a URL in mail or post, my OS X opens Safari to handle it;
I want to open Firebird. I can't find where the application to use for
URLs is declared - some guidance would be appreciated.
Thanks

I wanted to try thunderbird-0.6-macosx, but have been having difficulties.
I can download thunderbird-0.6-macosx.dmg.gz, and unzip it; but
thunderbird-0.6-macosx.dmg fails to mount. The message is "no mountable
file systems"