About Firefox I can only say that I feel the same thing as you describe,
Adrian, when you say that the current version isn't really usable on a
single-core system such as a G4. Even on a Dual-G4 or a Dual-G5,
TenFourFox for Mac OS X was very VERY slow... The latest versions of
Firefox are way too bloated for such hardware, so maybe we need to
realize that keeping a completely current userland on PPC32/64-based
Linux is no longer possible. A lot of projects have moved on and even
when the code compiles, it clearly isn't meant to run on such old
machines. This does include some older Pentiums and Core Duos I also
still lave laying around in my basement.