What is TenFourFox?

A fork of Firefox to maintain support for the Power Mac, supporting Mac OS X 10.4 and 10.5, with special features and optimizations for PowerPC processors and AltiVec. This project is not affiliated with nor supported by Mozilla in any way, and is not an official build. PowerPC forever!'

When Mozilla decided to stop releasing Firefox this was released to fill the gap. 

TenFourFox is a web browser for Power Macintosh computers, based on Mozilla's Gecko layout engine. It is a port of Mozilla Firefox for PowerPC-based Macintosh computers running Mac OS X to retain compatibility with the older architecture and older versions of the operating system, and to add PowerPC-specific optimizations for improved performance. The project was started after Mozilla announced that it would not release Firefox 4 for PowerPC versions of OS X. Like Firefox, it includes compatibility with a wide range of addons, Acid2 and Acid3 compliance, and HTML 5 and CSS 3 features. It also includes JavaScript just-in-time compilation, custom builds for specific PowerPC processor families and AltiVec acceleration of key media codecs.The primary maintainer is Cameron Kaiser.

The project shared administration with Classilla, a fork of Mozilla Application Suite for Mac OS 9 and Mac OS 8.6.

Download TenFourFox for Mac

Architecture

IBM PowerPC

System Requirements

From Mac OS 10.4 up to Mac OS 10.5

Compatibility notes

Versions included for G3, G4, G5

Mac OS X 10.4.9 or newer

Emulating this? It could probably run under: QEMU