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.

Avatar for Username

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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

just updated to 5.o on a G4 powerbook and it says architecture won't support it, how do i go back to the version i had on the laptop already? i think it was 3.something.

  • 1 valiny
  • 1 manana an'ity olana ity
  • 2 views
  • Valiny farany nomen'i cor-el

scottehoerle
scottehoerle
more options

G4 powerbook running OS 10.5.8 clicking on the download firefox 4 gives you the package file for firefox 5 instead, which has a big white slash through it because it doesn't work on this powerbook architecture apparently. any way to reinstall the version i just had on it before clicking upgrade?

G4 powerbook running OS 10.5.8 clicking on the download firefox 4 gives you the package file for firefox 5 instead, which has a big white slash through it because it doesn't work on this powerbook architecture apparently. any way to reinstall the version i just had on it before clicking upgrade?

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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 4 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: