This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can't use new version--and lost old--even tho I meet min req'ts for 4.0, namely Mac OS 10.5.8, multiple GB free on HD (although back up HD is full), 768MB DDR RAM. And now I can't find an older, compatible, version of Firefox on Mozilla site to download

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by PMacD

more options

I downloaded the newest version of Firefox to my lamp globe iMac and was unable to run it. The old version is now gone. Can't give all detail why that happened. Would like to either make version 4.0 work, or find an older version on the Mozilla site that will get me back to where I was.

I downloaded the newest version of Firefox to my lamp globe iMac and was unable to run it. The old version is now gone. Can't give all detail why that happened. Would like to either make version 4.0 work, or find an older version on the Mozilla site that will get me back to where I was.

Chosen solution

Beginning with Firefox 4, Macs must have an Intel x86 processor (which you do NOT have; yours is a PPC Mac) and OSX 10.5 or higher

The good news is that Firefox 3.6.24 still supports OSX 10.4 and Macs with the PPC Mac architecture. The bad news is that support for the Firefox 3.6.x series is likely to end in the first quarter of 2012.

You can try the third-party product TenFourFox that supports PPC Macs. Firefox 8 version of TenFourFox is available. The product is based on Firefox released versions. All support is provided by the developer, not by this site:


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.

Read this answer in context 👍 0

All Replies (2)

more options

Chosen Solution

Beginning with Firefox 4, Macs must have an Intel x86 processor (which you do NOT have; yours is a PPC Mac) and OSX 10.5 or higher

The good news is that Firefox 3.6.24 still supports OSX 10.4 and Macs with the PPC Mac architecture. The bad news is that support for the Firefox 3.6.x series is likely to end in the first quarter of 2012.

You can try the third-party product TenFourFox that supports PPC Macs. Firefox 8 version of TenFourFox is available. The product is based on Firefox released versions. All support is provided by the developer, not by this site:


If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.

more options

Thanks. Worked right away!