We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Este fío arquivouse. Faga unha nova pregunta se precisa axuda.

I attempted to update to Firefox 6 but my system won't support it. Then I tried upgrading to 4.0 but it automatically tries to upgrade to 6.0.

  • 1 resposta
  • 3 have this problem
  • 5 views
  • Last reply by cor-el

NWFF
NWFF
more options

We are operating with Firefox 3.6.

In order to use our Quickbooks online, they suggested upgrading to Firefox 6.0. I attempted and my system is too old (Mac OS 10.5.8).

So, I tried to download Firefox 4.0. When the download begins it's 6.0 that is attempting to download and once done, there is a circle and slash through the Firefox logo. I can't find a way to upgrade to 4.0.

Any help would be appreciated :) Wen

We are operating with Firefox 3.6. In order to use our Quickbooks online, they suggested upgrading to Firefox 6.0. I attempted and my system is too old (Mac OS 10.5.8). So, I tried to download Firefox 4.0. When the download begins it's 6.0 that is attempting to download and once done, there is a circle and slash through the Firefox logo. I can't find a way to upgrade to 4.0. Any help would be appreciated :) Wen

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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: