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I am running Mac OSX Panther and Firefox 2.0.0.8. I want to use Intuit tax on-line and was told to update to Firefox 3.o. Downloaded 3.o(2) but it will not open. Help. Newton

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Have tried twice to download 3.o and 3.0(2). When I click on the disk image, the icon bounces once or twice, but nothing happens. I have tried placing the old versions in trash, but this did not help.

Have tried twice to download 3.o and 3.0(2). When I click on the disk image, the icon bounces once or twice, but nothing happens. I have tried placing the old versions in trash, but this did not help.

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Sorry, Firefox 2.0.0.20 was the last ever release for Mac OSX 10.3.9 and earlier versions. You can get it here, but that isn't going to help you for websites that require a Firefox 3.0+ version. You're going to have to use a different browser that's compatible with that web site, or use a newer computer that has a newer operating system to be able to install a newer version of Firefox.
https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.20/mac/en-US/