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

I cannot upgrade to FFv4.0, even though I am using OSX 10.5.8, I have 2.25GB RAM and 6.24GB disk space. I can't even give feedback via FF3.6...this is crap!

  • 2 replies
  • 1 has this problem
  • 2 views
  • Last reply by cor-el

more options

I cannot upgrade to FFv4.o.

According to Mozilla website software specs (http://www.mozilla.org/en-US/firefox/4.0/system-requirements/), I have to be running either OSX 10.5 0r 10.6 - I am using 10.5.8. So I assume I have the minimum requirement?

Under recommended hardware (not required or minimum) it says I also need 512MB of RAM (I have 2.25GB), and 200MB of disk space (I have 6.24GB).

I can't even give feedback via FF3.6, which is ridiculous.

What am I doing wrong?

I cannot upgrade to FFv4.o. According to Mozilla website software specs (http://www.mozilla.org/en-US/firefox/4.0/system-requirements/), I have to be running either OSX 10.5 0r 10.6 - I am using 10.5.8. So I assume I have the minimum requirement? Under ''recommended'' hardware (not required or minimum) it says I also need 512MB of RAM (I have 2.25GB), and 200MB of disk space (I have 6.24GB). I can't even give feedback via FF3.6, which is ridiculous. What am I doing wrong?

All Replies (2)

more options

latest version of Firefox 8 download it from

more options

Firefox 4 versions and later do not run on a PowerPC Mac.

Firefox 4 and later require at least OS X 10.5 and an Intel Mac.

For an unofficial Firefox 8 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at:

Firefox 3.6.x (Mac OS X 10.4 and later) can be found here: