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 G5
• TenFourFox G4 - build 7450
• TenFourFox G4 - build 7400 (also for 7410)
• TenFourFox G3

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 and press return. You can read more in the Wiki entry; WhichVersion.

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. For details and an in-depth explanation of this policy and other workarounds, see Why aren't plugins supported in TenFourFox?. 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 Most importantly, Adobe Flash for PowerPC is no longer maintained and has known security risks that can crash or leak data, some sites requires versions not available on the PowerPC, and QuickTime for Leopard will lose its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.

Note: The 'Download' link yields the G5 version of TenFourFox. Additional downloads can be found in the Description.

New

• Now an independent evolving fork of Firefox.
• Additional support for ECMAScript 6 and ECMAScript 7 JavaScript features.
• Support for Brotli compression over HTTPS.

Fixed

• All relevant security and stability fixes from Firefox ESR 52.2.0.
• Multiple improvements to layout, DOM and JavaScript performance.
• SHA-1 certificates are now untrusted, as they are no longer considered secure.
• The font blacklist has been updated.

Known Issues

• Remember: Plugins do not work in TenFourFox and cannot be enabled.
• Starting in version 38, the new tab page is always blank for technical reasons.
• Starting in version 38, the default search provider is now Yahoo, not Google. You can change it back from the preferences page.
• 10.4Fx does not currently support WebGL, WebRTC, the Web Speech API or the webapp runtime, and scripts such as Arabic or Indic requiring glyph reordering or language-specific ligatures may not appear correctly without OpenType fonts (see issue 5 for more information).
• TenFourFox intentionally uses a different chrome for windows and dialogue boxes than prior versions or the official Mac Firefox.
• Bitmap-only fonts (usually Type 1 PostScript) cannot be used by the 10.4Fx font renderer and are automatically ignored by the browser. A fallback font will be used in their place.
• Graphite webfonts are not currently supported by TenFourFox.
• Personas and certain custom skins may hide the "traffic light" window buttons, but they are still present and will work if hovered over or clicked on.
• The "traffic light" buttons are misplaced on private browsing windows if the title bar is enabled (not the default). They function normally otherwise.
• Not all webcams are supported; in addition, multiple webcams may not all appear depending on how they are connected. Here is a list of supported webcam devices.
• Printing may crash the browser on Mac OS X Tiger Server. Please note that Mac OS X Server is not supported currently.
• Crash reporting is intentionally disabled to avoid polluting Mozilla's crash tracking system with our reports. Please use your system's crash logs if you are reporting a reproducible crash. Crashes that cannot be reproduced cannot be fixed, so please include detailed instructions on how to reliably trigger the crash with your report.
• Although 10.4Fx will tell you when an update is available, you must download updates manually at this time.