For me, swiftfox converted the old profile and upgraded all of the extensions flawlessly.
It is really just Firefox 2.0 built with various optimizations and specific compiler flags for your CPU.
It may be, however, that some of your extensions have not yet been upgraded to work with Firefox 2.0...
Backup your profile, just to be sure...
Well, I just downloaded the .deb for my architecture and installed it with
dpkg -i, but IIRC you should be able to put
Code:
deb http://getswiftfox.com/builds/debian unstable non-free
in your sources.list and then install the "unstable" package into your Etch with e.g.
apt-get install swiftfox-xp/unstable or however it works in your package manager of choice.
(Since I am not a political person and have not followed the debate, I won't say anything about that renaming issue, I find it pretty sad that two fractions which basically share the same ideals when it comes to free software cannot agree. IANAL, but couldn't Debianjust put Firefox into non-free and all would be happy...?)