TenFourFox

TenFourFox is a of the Firefox web browser for Mac OS X 10.4 (Tiger), which is no longer supported by Apple nor the Mozilla Foundation. It was maintained by Cameron Kaiser for PowerPC Macs until development was suspended in 2021.

Description
TenFourFox was forked from a beta version of Firefox 4, which dropped PowerPC support during development. It is not recommended to use TenFourFox simultaneously with Firefox 3.6 as it may result in the loss of user browsing data.

System requirements
As of 2021, the minimum system requirements are:
 * A PowerPC-based Macintosh with a PowerPC G3 processor. A PowerPC G4 or G5 is recommended.
 * Mac OS X 10.4.11, supported up to Mac OS X 10.5.8.
 * 500 MB of physical RAM.
 * 200 MB of free drive space.

Alternatives
As TenFourFox development was halted, alternative web browsers for PowerPC Macs include:
 * InterWebPPC, a simplified successor to TenFourFox, from the developer of Arctic Fox.
 * Roccat Browser, based on the WebKit engine for Mac OS X 10.5 or later.