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my mac has 10.3.9 I have firefox 2.0.0.20 I need newer version, but can't afford to upgrade my mac OS, what can I do?

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I have tried to download the newer firefox version 3.6 but my mac os 10.3.9 won't support it. whenever I call up my browser it tells me that it is urgent to upgrade firefox for online security. Someone told me I need a higher version of Mac OS, but I can't afford to upgrade. What can I do?

It is obvious that my firefox 2.0.0.20 is struggling. Its slow and can't access some things. I suppose I can tolerate that, but if I use firefox to do my online banking, am I'm in danger?

I have tried to download the newer firefox version 3.6 but my mac os 10.3.9 won't support it. whenever I call up my browser it tells me that it is urgent to upgrade firefox for online security. Someone told me I need a higher version of Mac OS, but I can't afford to upgrade. What can I do? It is obvious that my firefox 2.0.0.20 is struggling. Its slow and can't access some things. I suppose I can tolerate that, but if I use firefox to do my online banking, am I'm in danger?

Modified by the-edmeister

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You could try using the latest version of SeaMonkey available for MacOSX 10.3.9 - it is a little newer than Firefox 2.0.0.20 is, but it still has many "security advisories" . http://www.seamonkey-project.org/releases/1.1.19
http://www.mozilla.org/security/known-vulnerabilities/seamonkey11.html

You really aren't safe doing online financial transactions with an old Operating System and and old web browser.