I am using MAC pc in which I have OS X 10.5 which Is old. In my system I am using Firefox 3.6 version and now when I tried to upgrade it to Firefox 6.0 at that time I came to know that it 6.0 is not supported by my system and that is why I tried to update to Firefox 4.0 but at that time also it tries to upgrade for 6.0 version. Now please tell me how to fix this issue.
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