TenFourFox

TenFourFox is a Firefox-based web browser, reprogrammed for PowerPC-based Macs with separate downloads optimized for G3, G4 and G5 processors. Providing up-to-date security to the older Mac platform, it offers “the latest bug fixes, security improvements and all the powerful technology underlying Mozilla Firefox”, along with “AltiVec JPEG, HTML and WebM decoding acceleration for G4 and G5 Macintoshes” and JavaScript performance based on a “best-in-class, just-in-time PowerPC script compiler.

TenFourFox Feature Parity Release 19 is free and open-source software for PowerPC-based Macs running Mac OS X 10.4 and 10.5. Release 19 brings security fixes and updates.