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.

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 want to upgrade my Firefox version 2.0.0.20. My Mac system version is 10.3.9. Newest update won't work. What can I do?

more options

I want to upgrade my Firefox version 2.0.0.20. My Mac system version is 10.3.9. Newest update won't work. What can I do?

I want to upgrade my Firefox version 2.0.0.20. My Mac system version is 10.3.9. Newest update won't work. What can I do?

All Replies (1)

more options

Nothing - Firefox 2.0.0.20 is the last ever release for Mac OSX 10.3.9 and earlier versions.