Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Buscar en Ayuda

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 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 respuesta
  • 3 tienen este problema
  • 5 visitas
  • Última respuesta de cor-el

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

Todas las respuestas (1)

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: