Firefox no longer works with Mac OS X 10.4 or PowerPC processors

Revision Information
  • Revision id: 23791
  • Created:
  • Creator: Michael Verdi
  • Comment: Based on hsivonen - added descrete step to update from 10.6 to 10.7, removed camino, added tenfourfox for intel
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: No
Revision Source
Revision Content

Firefox 3.6.28 is the last version of Firefox that works with Mac OS X 10.4 or PowerPC processors. To keep your computer and personal information safe, we recommend that you upgrade to Mac OS X 10.7 and install the latest Firefox if possible. This article covers your upgrade options.

Note: This article only applies to Mac OS X.

Intel Processors

If you have an Intel processor and Mac OS X 10.4, your best option (secure and easy) is to upgrade Mac OS X. There is some cost involved with that so we've included some other options:

Option 1: Upgrade Mac OS X

You should upgrade to the latest Mac OS X (10.6 or 10.7). This is the most secure option and will allow you to run the latest and greatest Firefox.

  1. Upgrade to Mac OS X 10.6 (prerequisite for upgrading to 10.7)
  2. Upgrade to Mac OS X 10.7
    Note: Some Intel based Macs can only update to Mac OS X 10.6.
  3. Update Firefox.

Option 2: Switch to the TenFourFox web browser

If you can't upgrade Mac OS X, you can switch to the latest version of the TenFourFox web browser.

Note: TenFourFox does not support plugins. If you require using Flash, Java or other plugins, do not use TenFourFox.
Warning: Continuing to use Mac OS X 10.4 is no longer supported by Apple and poses a significant security risk.

PowerPC Processors

If you have a PowerPC processor you won't be able to upgrade MacOS X. For most people the best option will be to switch to a newer computer. There is some cost involved with that so we've included some other options:

Option 1: Switch to a Mac with an Intel processor

Although getting a newer computer can involve significant cost, a newer Mac will provide a much better experience and allow you to keep Firefox and Mac OS X updated and secure.

Option 2: Switch to the TenFourFox web browser

If you can't upgrade Mac OS X, you can switch to the latest version of the TenFourFox web browser.

Note: TenFourFox does not support plugins. If you require using Flash, Java or other plugins, do not use TenFourFox.
Warning: Continuing to use Mac OS X 10.4 is no longer supported by Apple and poses a significant security risk.