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I have an old MacBook laptop and it doesn't have enough memory for a new version of Firefox; why can't I keep the old version which works fine on this computer?


I am running Firefox version 3.6.23 and I keep getting a message saying that I should upgrade, but I am working on an older MacBook laptop computer with 640 MB of memory and an 800 MHz Power PC G4 with Mac OS X version 10.4.11 and when I tried to upgrade, your message said that it couldn't happen. Please let me keep running the older version of Firefox because it works fine on my old laptop.

Additional System Details

This happened

Not sure how often

This started when...

a week or so ago

Installed Plug-ins

  • Gecko default plugin
  • Runs Java applets using the latest installed versions of Java. For more information: Java Embedding Plugin. Run version test: Java Information.
  • Java 1.3.1 Plug-in
  • iPhoto6
  • Shockwave Flash 10.0 r12
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.


  • User Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv: Gecko/20110920 Firefox/3.6.23

More Information

I lost Firefox for a week or two after I tried to download the latest version; please let me keep the older version.

  • Top 25 Contributor
617 solutions 4263 answers

The latest 9.0.x version is not compatible with your os.

see :Firefox 9 System Requirements

Firefox 4 versions and later do not run on a PowerPC Mac(like yours) and require at least OS X 10.5 and an Intel Mac.

The latest supported version for your os is 3.6.25 (you have 3.6.23), your can download from here:


see : Firefox 3.6 System Requirements

[For older Macs that aren't supported in Firefox 4+ versions, if you like, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8]




thank you

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