Yet another Phoenix build for Linux (Intel 32-bit), although now it’s been renamed Firebird™. Download it here; as with previous builds, it is built with Xft and the Gtk 2.x toolkit and (optional) Xprint support. As always, you’ll probably need Debian unstable or something else very recent for it to run properly.
If you want to build your own copy from CVS, this .mozconfig file may be helpful. If you want to optimize it for your particular system, you’ll probably want to change the -mcpu=athlon to -march=whatever, but that may stop it from running on other CPUs.