TenFourFox

TenFourFox is a fast, efficient Web browser always based on the current version of Firefox, but unlike the main distribution TenFourFox is compatible with OS X 10.4 and 10.5 running on PowerPC processors. It comes in different tuned versions for specific PowerPC processor families:

• TenFourFox for G3 processors
• TenFourFox for G4 7400/7410 processors
• TenFourFox for G4 7450 processors
• TenFourFox for G5 processors

If you feel unsure what type of PowerPC processor your Mac has, go to the Apple menu and choose "About this Mac" and check the processor field. On the G4 Mac open the Terminal app (in Applications -> Utilities) and type the command machine.

TenFourFox no longer supports plugins or Flash - As of the previous TenFourFox 6.0, for the following reasons plugin support ships disabled. Sites will now act as if no plugins were installed at all. Plugins on PowerPC are of special concern because Mozilla is making updates to their plugin architecture which may require the plugins themselves to be updated, and there are certain difficult-to-correct bugs with them already on Tiger. Most importantly, Adobe Flash for PowerPC is no longer maintained and has known security risks that can crash or leak data, some sites require versions not available on the PowerPC, and QuickTime for Leopard will lose its own support with the release of OS X Lion. For these and other reasons, TenFourFox does not run plugins, and they cannot be enabled.

• Basic support for H.264 and MPEG-4 video (issue 550) using the TenFourFox MP4 Enabler. For licensing reasons this package is distributed separately. See Playing H.264 for important information on playing H.264 and MPEG-4 video in the browser. Only 1.25GHz or faster G4/7450 or G5 computers are supported
• JavaScript can now be embedded in AppleScripts and executed in browser tabs; see AppleScript for how to use AppleScript to control TenFourFox
• Frame rate is now capped to 30fps with software vsync to increase browser throughput between frames
• Malicious sites are limited to three authentication prompts per docshell to prevent modal windows from locking up the browser
• All relevant security and stability fixes from Firefox ESR 60.7.0
• A bug in AppleScript support where current tab may not reference the proper tab has been fixed
• The font blacklist has been updated

Full changelog available here