Why does firefox 4 work with Windows 2000, but not Mac OS X 10.4.x, which is several years more recent?

There is a third party version of Firefox 4 that runs on OS X 10.4/10.5 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox

Wow! Ask and you receive. I definitely will give that a try. I also have told another G4 owner about this.

Thanks.

The icon above your name looks familiar, but I cannot place it.