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I have the Mac OS 10.3.9 and cannot load ANY version of Firefox. Suggestions?

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Also, when I tried to download either Firefox 3 or 4 from your site, I was informed the app was "corrupt." Any suggestions?

Also, when I tried to download either Firefox 3 or 4 from your site, I was informed the app was "corrupt." Any suggestions?

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The last version of Firefox that works on OS X 10.3.9 is Firefox 2.0.0.20 available from ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.20/mac/en-US/

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Take a look at Classzilla for that older Mac.
http://www.floodgap.com/software/classilla/