Best lightweight browser for OS X 10.4.11 iBook G4
TenFourFox

A rewritten version of Firefox compiled to run great on older hardware.




  We take the industry standard Mozilla Firefox browser and rewrite it to be compatible with Mac OS X 10.4 and 10.5, then compile it specially optimized for your G3, G4 or G5, add AltiVecTM JPEG, HTML and WebM decoding acceleration for G4 and G5 Macintoshes, and soup up JavaScript performance with our best-in-class just-in-time PowerPC script compiler. One of our four versions is just right for your particular Power Mac. And we keep it current, secure, and ready to rock.